CA1181061A - Lubricants for gas compressors - Google Patents
Lubricants for gas compressorsInfo
- Publication number
- CA1181061A CA1181061A CA000376668A CA376668A CA1181061A CA 1181061 A CA1181061 A CA 1181061A CA 000376668 A CA000376668 A CA 000376668A CA 376668 A CA376668 A CA 376668A CA 1181061 A CA1181061 A CA 1181061A
- Authority
- CA
- Canada
- Prior art keywords
- glycol
- dimethyl ether
- lubricant
- ch3o
- compressor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
- C10M107/20—Lubricating compositions characterised by the base-material being a macromolecular compound containing oxygen
- C10M107/30—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M107/32—Condensation polymers of aldehydes or ketones; Polyesters; Polyethers
- C10M107/34—Polyoxyalkylenes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/108—Polyethers, i.e. containing di- or higher polyoxyalkylene groups etherified
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/30—Refrigerators lubricants or compressors lubricants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/32—Wires, ropes or cables lubricants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/34—Lubricating-sealants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/36—Release agents or mold release agents
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/38—Conveyors or chain belts
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/40—Generators or electric motors in oil or gas winning field
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/42—Flashing oils or marking oils
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/44—Super vacuum or supercritical use
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/50—Medical uses
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
Abstract Piston compressors used in natural gas processing are lubricated with a lubricant which is compatible with the processing materials used downstream of the compressor. A preferred class of lubricants comprises the polyglycols.
Description
6 ~
LUBRICANTS FOR ~AS COMPRESSORS
The present invention relates to lubricants for gas compressors, particularly piston type gas compressors used in the processing of natural gas.
Non-lubricated compressors, with any liner-type cylinders, have been used, for compressing gases, especially in applications where the delivery pressures are not excessive and the wear and tear imposed on the working parts is not too great. One such application has been in the processing of natural gases, for example, in compressing the gases leaving the flash steps of a sweetening plant. In ce~tain applications of this kind, it has been found that the gas from the flash steps of the sweetening plant, which still contains H2S and C02, may contain an unusually high content of solids which will cause excessive wear in the piston supporting and packing rings and will, within a few days, require the compressor to be taken out of operation.
Various solutions to this problem are possible - and even technically feasible - but for differing reasons may be unattractive. For example, complete removal of the entrained solids by filtration, centrifugation or precipitation, may be technically unfeasible because of space limitations on the physical equipment which would be necessary.
ûn the other hand, conversion of the compressor to conventional oil lubrication in order to control the wear problem would require the oil mist to be separated from the compressed gas and even then, complete exclusion of residual oil particles cannot be guaranteed, thereby creating a likelihood of oil contamination and foaming in subsequent processing steps. The technical problems and expense associated with this particular solution are therefore substantial.
We have now found that the operation of any liner-type compressors used in the processing of gases may be improved by using a lubricant which comprises one or more of the solvents, solvent components or drying solutions used in the processing of the gas.
It is also possible to use a lubricant fluid which is compatible with the solvents and other materials used in the processing o~
downstream of the compressor, i.eO a fluid which does not adversely react with such materials. The use of such fluids as the lubricant avoids contamination and other processing difficulties in subsequent stages of the processing plant while, at the same time, increasing the useful working life and maintenance interval of the compressor.
The compatibility of the lubricant fluid with the liquids used in subsequent processing steps prevents undesired reactiGns between these mate~ials.
The final choice of compressor lubricant depends, of course, on the kind of processing plant following the compressor and upon the solvents or solutions used in that plant. Suitable compressor lubricants for use in natural gas compressors therefore include the anhydrous, physically effective solvents, solvent components or drying solutions which are used alone or in combination in the gas sweetening or dehydration plants. These lubricants do not, in general, contain components which chemically react with or dissolve components of the gases which are being compressed.
The lubricant can be supplied to the compressor by feeding it in at the lubricating points provided in the compressor structure for lubrication of the cylinder. The lubricants may be used for lubricating all parts of the compressor which come into contact with the gas which is being compressed, including the cylinders, cylinder tracks, pistons, piston rings and main packing boxes and glands.
Preferred lubricants for use in natural gas processing plants are described below but the particular material used will, as stated above, be chosen according to the nature of the processing steps downstream of the compressor e.g. the dehydration or sweetening steps.
The polyglycols or polyalkylene oxides comprise a preferred class of lubricants for the present purpose. The polyglycols are essentially linear polymers having the following general formula R0-(CH2-CHR'-0)x-R'' where R' is hydrogen or an alkyl group or both, in different portions of the molecule. The end groups, R and R", are usually hydrogen or alkyl groups, generally lower alkyl, especially Cl to 1 18~0~
F-0603 ~3-C4 alkyl, although aromatic groups such as phenyl may be used in certain phenyl ether polyglycols. For present purposes R and R" are preferably hydrogen or methyl and R' is preferably hydrogen. That is, the preferred polyglycols for use according to the present invention are polyethylene glycols and their dimethyl ethers.
In the formula given above, x represents the degree of polymerization of the glycol. For the present purposes, relatively low molecular weight polyglycols and polyglycol ethers are preferred, where x is from 2 to 12, although higher molecular weight materials may be used. The glycols and glycol ethers may, of course, be used in oombination with one another.
Specific materials which may be used include the following:
Name Formula Diethylene glycol HO-(CH2~CH2-0~2-H
Triethylene glycol HOL(CH~-CH2-0~3~H
Tetraethylene glycol HO-(CH2-C~2-0)~-H
Triethylene glycol- CH30-(CH2-c ~ -)3 CH3 dimethyl ether Tetraethylene glycol- CH30-(CH2-CH2-0)4-CH3 dimethyl ether Pentaethylene glycol- CH30~(CH2-CH2-0)5-CH3 dimethyl ether Hexaethylene glycol- C ~ O-(CH2-CH2-0)6-CH3 dimethyl ether Heptaethylene glycol- CH30-(CH2-CH2-0)7~C~
dimethyl ether Octaethylene glycol- CH30-(~H~-CH2-0)8-CH3 dimethyl ether Nonaethylene glycol- CH3o-(cH2-cH2-o)9 CH3 dimethyl ether Thus, for the present purposes, polyglycols and poly-glycol ethers having molecular weights from 62 up to about 450 are preferred. Other similar materials and blends of materials may also be used. Examples of them are disclosed in the art, for instance, Synthetic Lubricants, Gunderson and Hart (Ed.), Reinhold, N.Y. 1962, Chapter 3. They are also commercially available, for example, as the UCON (trademark) fluids of Union Carbide.
0 ~ ~
Specific and preferred blends of polyglycols and poly-glycol ethers are as follows:
Lubricant A
~ . _ A blend of polyglycols which has the following properties:
Density at 20C 1.1254 kg~l Molecular weight 150.2 Boiling point at 760 Torr 287.4C
Thickening point at 760 Torr -7.2C
Viscosity at 20C 47.8 cP.
Lubrican-t B
A blend of seven ethylene glycol dimethyl ethers having the following properties:
Density at 25C 1.031 kg/l Vapor pressure at 25C 0.001 mbar Molecular weight 280 to 310 Freezing point -22 to -29C
Specific heat:
at 5C 0.49 kCal.kg-loc-l at 100C 0.51 kCa1.kg~loc 1 Viscosity at 25C 5.8 cP
Surface tension at 25C 34.3 dyn/cm Thermal conductivity at 25C 0.16 kcal. m 1 h -lC~
Flash point 151C
A specific blend conforming to the requirements of Lubrican-t A is as follows:
Lubricant A-l Component Wt. Percent Diethylene glycol Triethylene glycol 98 Tetraethylene glycol 0.5 Other ingredients o.s F-~603 -5-A blend of seven ethers conforming to the specification for Lubricant B is as follows: c Lubricant B-1 Component Wt. Percent Triethylene glycol dimethyl ether 12 Tetraethylene glycol dimethyl ether 24 Pentaethylene glycol dimethyl ether 25 Hexaethylene glycol dimethyl ether 19 Heptaethylene glycol dimethyl ether 11 Octaethylene glycol dimethyl ether 6 Nonaethylene glycol dimethyl ether 3 The invention is illustrated by the following Examples.
Example 1 A strip gas piston-type compressor was lubricated with Lubricant A-l above. The compressor characteristics were as follows:
Manufacturer: Klein, Schanzlin and Becker(KSB) Capacity : 600 m3. hr. 1 Inlet pressure: ~0 bar Delivery pressure: 70 bar No. of stages: 1 The compressor was supplied with the lubricant on a flow-through basis at a rate of 4 l.hr. for cylinder and piston rod lubrication.
Example 2 A recycle compressor in a sour natural gas sweetening plant was lubricated with Lubricant B-l above. The compressor characteristics were as follows:
Manufacturer: Thomassen Capacity : 18,800 m.3 hr. 1 Inlet pressure: 1 bar Delivery pressure: 78.5 bar No. of stages: 4 The compressor was supplied with the lubricant on a flow-through basis at a rate of 1 l.hr. 1 for cylinder and piston rod lubrication.
Example 3 A strip gas compressor was lubricated with Lubricant A-l above. The compressor characteristics were as follows:
Manufacturer: aorsig Capacity : 9 000 m3 hr -1 Inlet pressure: 59 bar Delivery pressure: 119 bar No. of stages:
The compressor was supplied with the lubricant on a flow-through basis at a rate of 4 l.hr. 1 for cylinder and piston rod lubrication.
The use of the lubricant fluids according to the invention avoids undesired contamination of the downstream processing steps and eliminates the problem of foam formation which would be encountered with conventional oil lubrication. At the same time, the operating life and maintenance interval of the compressors may be increased.
LUBRICANTS FOR ~AS COMPRESSORS
The present invention relates to lubricants for gas compressors, particularly piston type gas compressors used in the processing of natural gas.
Non-lubricated compressors, with any liner-type cylinders, have been used, for compressing gases, especially in applications where the delivery pressures are not excessive and the wear and tear imposed on the working parts is not too great. One such application has been in the processing of natural gases, for example, in compressing the gases leaving the flash steps of a sweetening plant. In ce~tain applications of this kind, it has been found that the gas from the flash steps of the sweetening plant, which still contains H2S and C02, may contain an unusually high content of solids which will cause excessive wear in the piston supporting and packing rings and will, within a few days, require the compressor to be taken out of operation.
Various solutions to this problem are possible - and even technically feasible - but for differing reasons may be unattractive. For example, complete removal of the entrained solids by filtration, centrifugation or precipitation, may be technically unfeasible because of space limitations on the physical equipment which would be necessary.
ûn the other hand, conversion of the compressor to conventional oil lubrication in order to control the wear problem would require the oil mist to be separated from the compressed gas and even then, complete exclusion of residual oil particles cannot be guaranteed, thereby creating a likelihood of oil contamination and foaming in subsequent processing steps. The technical problems and expense associated with this particular solution are therefore substantial.
We have now found that the operation of any liner-type compressors used in the processing of gases may be improved by using a lubricant which comprises one or more of the solvents, solvent components or drying solutions used in the processing of the gas.
It is also possible to use a lubricant fluid which is compatible with the solvents and other materials used in the processing o~
downstream of the compressor, i.eO a fluid which does not adversely react with such materials. The use of such fluids as the lubricant avoids contamination and other processing difficulties in subsequent stages of the processing plant while, at the same time, increasing the useful working life and maintenance interval of the compressor.
The compatibility of the lubricant fluid with the liquids used in subsequent processing steps prevents undesired reactiGns between these mate~ials.
The final choice of compressor lubricant depends, of course, on the kind of processing plant following the compressor and upon the solvents or solutions used in that plant. Suitable compressor lubricants for use in natural gas compressors therefore include the anhydrous, physically effective solvents, solvent components or drying solutions which are used alone or in combination in the gas sweetening or dehydration plants. These lubricants do not, in general, contain components which chemically react with or dissolve components of the gases which are being compressed.
The lubricant can be supplied to the compressor by feeding it in at the lubricating points provided in the compressor structure for lubrication of the cylinder. The lubricants may be used for lubricating all parts of the compressor which come into contact with the gas which is being compressed, including the cylinders, cylinder tracks, pistons, piston rings and main packing boxes and glands.
Preferred lubricants for use in natural gas processing plants are described below but the particular material used will, as stated above, be chosen according to the nature of the processing steps downstream of the compressor e.g. the dehydration or sweetening steps.
The polyglycols or polyalkylene oxides comprise a preferred class of lubricants for the present purpose. The polyglycols are essentially linear polymers having the following general formula R0-(CH2-CHR'-0)x-R'' where R' is hydrogen or an alkyl group or both, in different portions of the molecule. The end groups, R and R", are usually hydrogen or alkyl groups, generally lower alkyl, especially Cl to 1 18~0~
F-0603 ~3-C4 alkyl, although aromatic groups such as phenyl may be used in certain phenyl ether polyglycols. For present purposes R and R" are preferably hydrogen or methyl and R' is preferably hydrogen. That is, the preferred polyglycols for use according to the present invention are polyethylene glycols and their dimethyl ethers.
In the formula given above, x represents the degree of polymerization of the glycol. For the present purposes, relatively low molecular weight polyglycols and polyglycol ethers are preferred, where x is from 2 to 12, although higher molecular weight materials may be used. The glycols and glycol ethers may, of course, be used in oombination with one another.
Specific materials which may be used include the following:
Name Formula Diethylene glycol HO-(CH2~CH2-0~2-H
Triethylene glycol HOL(CH~-CH2-0~3~H
Tetraethylene glycol HO-(CH2-C~2-0)~-H
Triethylene glycol- CH30-(CH2-c ~ -)3 CH3 dimethyl ether Tetraethylene glycol- CH30-(CH2-CH2-0)4-CH3 dimethyl ether Pentaethylene glycol- CH30~(CH2-CH2-0)5-CH3 dimethyl ether Hexaethylene glycol- C ~ O-(CH2-CH2-0)6-CH3 dimethyl ether Heptaethylene glycol- CH30-(CH2-CH2-0)7~C~
dimethyl ether Octaethylene glycol- CH30-(~H~-CH2-0)8-CH3 dimethyl ether Nonaethylene glycol- CH3o-(cH2-cH2-o)9 CH3 dimethyl ether Thus, for the present purposes, polyglycols and poly-glycol ethers having molecular weights from 62 up to about 450 are preferred. Other similar materials and blends of materials may also be used. Examples of them are disclosed in the art, for instance, Synthetic Lubricants, Gunderson and Hart (Ed.), Reinhold, N.Y. 1962, Chapter 3. They are also commercially available, for example, as the UCON (trademark) fluids of Union Carbide.
0 ~ ~
Specific and preferred blends of polyglycols and poly-glycol ethers are as follows:
Lubricant A
~ . _ A blend of polyglycols which has the following properties:
Density at 20C 1.1254 kg~l Molecular weight 150.2 Boiling point at 760 Torr 287.4C
Thickening point at 760 Torr -7.2C
Viscosity at 20C 47.8 cP.
Lubrican-t B
A blend of seven ethylene glycol dimethyl ethers having the following properties:
Density at 25C 1.031 kg/l Vapor pressure at 25C 0.001 mbar Molecular weight 280 to 310 Freezing point -22 to -29C
Specific heat:
at 5C 0.49 kCal.kg-loc-l at 100C 0.51 kCa1.kg~loc 1 Viscosity at 25C 5.8 cP
Surface tension at 25C 34.3 dyn/cm Thermal conductivity at 25C 0.16 kcal. m 1 h -lC~
Flash point 151C
A specific blend conforming to the requirements of Lubrican-t A is as follows:
Lubricant A-l Component Wt. Percent Diethylene glycol Triethylene glycol 98 Tetraethylene glycol 0.5 Other ingredients o.s F-~603 -5-A blend of seven ethers conforming to the specification for Lubricant B is as follows: c Lubricant B-1 Component Wt. Percent Triethylene glycol dimethyl ether 12 Tetraethylene glycol dimethyl ether 24 Pentaethylene glycol dimethyl ether 25 Hexaethylene glycol dimethyl ether 19 Heptaethylene glycol dimethyl ether 11 Octaethylene glycol dimethyl ether 6 Nonaethylene glycol dimethyl ether 3 The invention is illustrated by the following Examples.
Example 1 A strip gas piston-type compressor was lubricated with Lubricant A-l above. The compressor characteristics were as follows:
Manufacturer: Klein, Schanzlin and Becker(KSB) Capacity : 600 m3. hr. 1 Inlet pressure: ~0 bar Delivery pressure: 70 bar No. of stages: 1 The compressor was supplied with the lubricant on a flow-through basis at a rate of 4 l.hr. for cylinder and piston rod lubrication.
Example 2 A recycle compressor in a sour natural gas sweetening plant was lubricated with Lubricant B-l above. The compressor characteristics were as follows:
Manufacturer: Thomassen Capacity : 18,800 m.3 hr. 1 Inlet pressure: 1 bar Delivery pressure: 78.5 bar No. of stages: 4 The compressor was supplied with the lubricant on a flow-through basis at a rate of 1 l.hr. 1 for cylinder and piston rod lubrication.
Example 3 A strip gas compressor was lubricated with Lubricant A-l above. The compressor characteristics were as follows:
Manufacturer: aorsig Capacity : 9 000 m3 hr -1 Inlet pressure: 59 bar Delivery pressure: 119 bar No. of stages:
The compressor was supplied with the lubricant on a flow-through basis at a rate of 4 l.hr. 1 for cylinder and piston rod lubrication.
The use of the lubricant fluids according to the invention avoids undesired contamination of the downstream processing steps and eliminates the problem of foam formation which would be encountered with conventional oil lubrication. At the same time, the operating life and maintenance interval of the compressors may be increased.
Claims (7)
1. A method of lubricating a piston-type compressor used for compressing natural gas in which the lubricant is a solvent, solvent component or a drying solution used in the processing of the gas downstream of the compressor or is compatible with them, said lubricant comprising a polyglycol, polyglycol ether or mixture thereof.
2. A method according to claim 1 in which the lubricant is used to lubricate the cylinder tracks, pistons, piston rings and main packing boxes of the compressor.
3. A method according to claim 1 in which the lubricant comprises in parts by weight:
Diethylene glycol 1 Triethylene glycol 98 Tetraethylene glycol 0.5 Other ingredients 0.5.
Diethylene glycol 1 Triethylene glycol 98 Tetraethylene glycol 0.5 Other ingredients 0.5.
4. A method according to claim 1 in which the lubricant comprises in parts by weight:
Triethylene glycol dimethyl ether 12 Tetraethylene glycol dimethyl ether 24 Pentaethylene glycol dimethyl ether 25 Hexaethylene glycol dimethyl ether 19 Heptaethylene glycol dimethyl ether 11 Octaethylene glycol dimethyl ether 6 Nonaethylene glycol dimethyl ether 3.
Triethylene glycol dimethyl ether 12 Tetraethylene glycol dimethyl ether 24 Pentaethylene glycol dimethyl ether 25 Hexaethylene glycol dimethyl ether 19 Heptaethylene glycol dimethyl ether 11 Octaethylene glycol dimethyl ether 6 Nonaethylene glycol dimethyl ether 3.
5. A method according to claim 1 wherein the polyglycol or polyglycol ether is selected from the group consisting of:
Diethylene glycol HO-(CH2-CH2-O)2-H
Triethylene glycol HO-(CH2-CH2-O)3-H
Tetraethylene glycol HO-(CH2-CH2-O)4-H
Triethylene glycol- CH3O-(CH2-CH2-O)3-CH3 dimethyl ether Tetraethylene glycol- CH3O-(CH2-CH2-O)4-CH3 dimethyl ether Pentaethylene glycol- CH3O-(CH2-CH2-O)5-CH3 dimethyl ether Hexaethylene glycol- CH3O-(CH2-CH2-O)6-CH3 dimethyl ether Heptaethylene glycol- CH3O-(CH2-CH2-O)7-CH3 dimethyl ether Octaethylene glycol- CH3O-(CH2-CH2-O)8-CH3 dimethyl ether Nonaethylene glycol- CH3O-(CH2-CH2-O)9-CH3 dimethyl ether and mixtures thereof.
Diethylene glycol HO-(CH2-CH2-O)2-H
Triethylene glycol HO-(CH2-CH2-O)3-H
Tetraethylene glycol HO-(CH2-CH2-O)4-H
Triethylene glycol- CH3O-(CH2-CH2-O)3-CH3 dimethyl ether Tetraethylene glycol- CH3O-(CH2-CH2-O)4-CH3 dimethyl ether Pentaethylene glycol- CH3O-(CH2-CH2-O)5-CH3 dimethyl ether Hexaethylene glycol- CH3O-(CH2-CH2-O)6-CH3 dimethyl ether Heptaethylene glycol- CH3O-(CH2-CH2-O)7-CH3 dimethyl ether Octaethylene glycol- CH3O-(CH2-CH2-O)8-CH3 dimethyl ether Nonaethylene glycol- CH3O-(CH2-CH2-O)9-CH3 dimethyl ether and mixtures thereof.
6. A method according to claim 1 wherein the lubricant is a blend of polyglycols having the following properties:
Density at 20°C 1.1254 kg/l Molecular weight 150.2 Boiling point at 760 Torr 287.4°C
Thickening point at 760 Torr -7.2°C
Viscosity at 20°C 47.8cP.
Density at 20°C 1.1254 kg/l Molecular weight 150.2 Boiling point at 760 Torr 287.4°C
Thickening point at 760 Torr -7.2°C
Viscosity at 20°C 47.8cP.
7. A method according to claim 1 wherein the lubricant is a blend of seven ethylene glycol dimethyl ethers having the following properties:
Density at 25°C 1.031 kg/l Vapor pressure at 25°C 0.001 mbar Molecular weight 280 to 310 Freezing point -22° to -29°C
Specific heat:
at 5°C 0.49 kcal.kg-1°C-1 at 100°C 0.51 kcal.kg-1°C-1 Viscosity at 25°C 5.8 cP
Surface tension at 25°C 34.3 dyn/cm Thermal conductivity at 25°C 0.16 kcal.m-1 hour -1°C-1 Flash point 151°C.
Density at 25°C 1.031 kg/l Vapor pressure at 25°C 0.001 mbar Molecular weight 280 to 310 Freezing point -22° to -29°C
Specific heat:
at 5°C 0.49 kcal.kg-1°C-1 at 100°C 0.51 kcal.kg-1°C-1 Viscosity at 25°C 5.8 cP
Surface tension at 25°C 34.3 dyn/cm Thermal conductivity at 25°C 0.16 kcal.m-1 hour -1°C-1 Flash point 151°C.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803016805 DE3016805A1 (en) | 1980-05-02 | 1980-05-02 | LUBRICANTS FOR FAS COMPRESSORS |
| DE3016805.9 | 1980-05-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1181061A true CA1181061A (en) | 1985-01-15 |
Family
ID=6101419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000376668A Expired CA1181061A (en) | 1980-05-02 | 1981-05-01 | Lubricants for gas compressors |
Country Status (6)
| Country | Link |
|---|---|
| CA (1) | CA1181061A (en) |
| DE (1) | DE3016805A1 (en) |
| GB (1) | GB2075544B (en) |
| MY (1) | MY8500085A (en) |
| NL (1) | NL190622C (en) |
| NO (1) | NO150642C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100005707A1 (en) * | 2008-07-09 | 2010-01-14 | Eberhard Jacob | Low-soot diesel fuels comprising a fuel additive, use thereof and the use of the fuel additive for producing low-soot diesel fuels |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2121818B (en) * | 1982-06-11 | 1985-08-14 | Shell Int Research | Lubrication of piston-type natural gas re-injection compressors |
| FR2552238B2 (en) * | 1983-09-16 | 1985-10-25 | Cables De Lyon Geoffroy Delore | |
| GB0108386D0 (en) | 2001-04-04 | 2001-05-23 | Bp Exploration Operating | Process |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE553313C (en) * | 1931-02-14 | 1932-06-24 | I G Farbenindustrie Akt Ges | lubricant |
| DE920864C (en) * | 1951-03-07 | 1954-12-02 | Basf Ag | lubricant |
| GB1388012A (en) * | 1972-02-09 | 1975-03-19 | Shell Int Research | Hydraulic fluids and their preparation |
-
1980
- 1980-05-02 DE DE19803016805 patent/DE3016805A1/en not_active Ceased
-
1981
- 1981-04-28 NO NO811436A patent/NO150642C/en unknown
- 1981-04-30 GB GB8113298A patent/GB2075544B/en not_active Expired
- 1981-05-01 NL NL8102164A patent/NL190622C/en not_active IP Right Cessation
- 1981-05-01 CA CA000376668A patent/CA1181061A/en not_active Expired
-
1985
- 1985-12-30 MY MY85/85A patent/MY8500085A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100005707A1 (en) * | 2008-07-09 | 2010-01-14 | Eberhard Jacob | Low-soot diesel fuels comprising a fuel additive, use thereof and the use of the fuel additive for producing low-soot diesel fuels |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2075544A (en) | 1981-11-18 |
| NO811436L (en) | 1981-11-03 |
| GB2075544B (en) | 1983-06-29 |
| NL8102164A (en) | 1981-12-01 |
| NL190622B (en) | 1993-12-16 |
| MY8500085A (en) | 1985-12-31 |
| DE3016805A1 (en) | 1981-11-12 |
| NO150642B (en) | 1984-08-13 |
| NL190622C (en) | 1994-05-16 |
| NO150642C (en) | 1984-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5957676A (en) | Rotary compressor with water miscible lubricant | |
| US5143640A (en) | Polyether lubricants | |
| CA2360536C (en) | Lubricant refrigerant composition for hydrofluorocarbon (hfc) refrigerants | |
| KR100348666B1 (en) | Ammonia refrigerant lubricant composition for use in compressed refrigeration systems | |
| KR100287584B1 (en) | Refrigerator oil composition | |
| US8476210B2 (en) | Composition for compressor working fluid for applications with soluble gas or gas condensates | |
| JPS5558298A (en) | Lubricating oil for rotary refrigerant compressor | |
| EP1792970B1 (en) | Refrigerator oil composition containing an aromatic sulfur compound | |
| CN1044292A (en) | Be used for polyoxyethylene glycol lubricant of refrigerator and preparation method thereof | |
| CA1181061A (en) | Lubricants for gas compressors | |
| US4711714A (en) | Method for the separation of gas from oil | |
| JPH0631363B2 (en) | Lubricating oil composition for refrigerator | |
| EP0386851B1 (en) | Refrigeration lubricants | |
| US20050250654A1 (en) | Compressor lubricant compositions | |
| CA2375594C (en) | Refrigerator lubricant composition comprising an aliphatic substituted naphthalene with carbon dioxide as refrigerant | |
| US5543068A (en) | Lubricating oils for flon compressors, compositions adapted for flon compressors and composed of mixtures of said lubricating oils and flon, and process for lubricating flon compressor by using said lubricating oils | |
| CA1227185A (en) | Water-tolerant lubricant composition | |
| US4438006A (en) | Perfluorinated aliphatic polyalkylether lubricant with an additive composed of an aromatic phosphine substituted with perfluoroalkylether groups | |
| US4690698A (en) | Absolute separator | |
| Miller | Synthetic lubricants and their industrial applications | |
| WO2000024849A1 (en) | Lubricant compositions | |
| KR20020068545A (en) | Refrigerant Lubricant Composition Comprising a Foam-Inducing Additive | |
| RU2084495C1 (en) | Lubricating composition for ethylene compressors of production of high pressure polyethylene | |
| US2751356A (en) | Hydraulic pressure transmitting fluid | |
| Short | Natural and Process Compressors |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |