CN114106908A - Graphite high-temperature synthetic lubricating grease and preparation method thereof - Google Patents
Graphite high-temperature synthetic lubricating grease and preparation method thereof Download PDFInfo
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- 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
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
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- 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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/04—Elements
- C10M2201/041—Carbon; Graphite; Carbon black
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- 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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/065—Sulfides; Selenides; Tellurides
- C10M2201/066—Molybdenum sulfide
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- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups
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- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
- C10M2207/1265—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic used as thickening agent
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- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/127—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids polycarboxylic
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- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/128—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof
- C10M2207/1285—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof used as thickening agents
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- 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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
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- 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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
- C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
- C10M2219/066—Thiocarbamic type compounds
- C10M2219/068—Thiocarbamate metal salts
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- 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
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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- 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
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/08—Resistance to extreme temperature
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- 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
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
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- 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
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
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- 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
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/26—Waterproofing or water resistance
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- 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
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/10—Semi-solids; greasy
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Abstract
The invention provides graphite high-temperature synthetic lubricating grease which is prepared from the following raw materials in parts by weight: 70-80 parts of base oil, 10-15 parts of dodecahydroxy stearic acid, 2-8 parts of stearic acid, 0.2-1 part of glycerol, 3-12 parts of lithium hydroxide monohydrate, 1.5-2 parts of boric acid, 0.1-0.6 part of sebacic acid, 2-6 parts of molybdenum disulfide powder, 1-3 parts of molybdenum dialkyl dithiocarbamate, 1-3 parts of pour point depressant, 3-7 parts of barium petroleum sulfate and 3-5 parts of graphite. The method for preparing the graphite high-temperature synthetic lubricating grease is provided, and the lubricating grease prepared by the method has a wide use temperature: the water-resistant epoxy resin composition can be used under any working conditions at the temperature of-35-300 ℃, and has oxidation resistance, water resistance and mechanical stability.
Description
Technical Field
The invention relates to the technical field of lubricating grease, and particularly relates to graphite high-temperature synthetic lubricating grease and a preparation method thereof.
Background
With the development of modern science and technology, the development of high-end equipment, national defense construction and other fields is fast, the graphite high-temperature synthetic lubricating grease can be stably used under the conditions of severe equipment friction and severe environment, and the extreme pressure performance and the sealing performance are good. However, when the existing high-temperature lubricating grease is used under a high-temperature condition, the performances such as temperature resistance, extreme pressure property and the like are not ideal, the environmental pollution is easily caused, the service life is short, the preparation process is complex, and the cost is higher. Therefore, a graphite high-temperature synthetic lubricating grease is urgently needed to meet the requirements of modern production and meet the harsh requirements of equipment on the lubricating grease.
Disclosure of Invention
In view of the above, the present invention provides a graphite high-temperature synthetic grease and a preparation method thereof, and the grease prepared by the method has a wide application temperature: the water-resistant epoxy resin composition can be used under any working conditions at the temperature of-35-300 ℃, and has oxidation resistance, water resistance and mechanical stability.
In order to solve the technical problems, the invention provides graphite high-temperature synthetic lubricating grease which is prepared from the following raw materials in parts by weight: 70-80 parts of base oil, 10-15 parts of dodecahydroxy stearic acid, 2-8 parts of stearic acid, 0.2-1 part of glycerol, 3-12 parts of lithium hydroxide monohydrate, 1.5-2 parts of boric acid, 0.1-0.6 part of sebacic acid, 2-6 parts of molybdenum disulfide powder, 1-3 parts of molybdenum dialkyl dithiocarbamate, 1-3 parts of pour point depressant, 3-7 parts of barium petroleum sulfate and 3-5 parts of graphite.
Further, the base oil is one or a mixture of mineral oil, silicone oil and poly-alpha-olefin synthetic oil.
Furthermore, the content of the dodecahydroxystearic acid is more than 95%, the content of the stearic acid is more than 90%, the content of the glycerol is more than 95%, the content of the lithium hydroxide monohydrate is more than 90%, the content of the boric acid is more than 95%, and the content of the sebacic acid is more than 95%.
Furthermore, the molybdenum number of the molybdenum disulfide is 2000-3000 molybdenum.
Further, the graphite high-temperature synthetic lubricating grease is prepared from the following raw materials in parts by weight: 70-80 parts of base oil, 10-15 parts of dodecahydroxy stearic acid, 2-8 parts of stearic acid, 0.2-1 part of glycerol, 3-12 parts of lithium hydroxide monohydrate, 1.5-2 parts of boric acid, 0.1-0.6 part of sebacic acid, 2-6 parts of molybdenum disulfide powder, 1-3 parts of molybdenum dialkyl dithiocarbamate, 1-3 parts of pour point depressant, 3-7 parts of barium petroleum sulfate and 3-5 parts of graphite.
The preparation method of the graphite high-temperature synthetic lubricating grease comprises the following steps:
(1) adding base oil into a saponification kettle, stirring and mixing, heating to raise the temperature, adding dodecahydroxystearic acid, stearic acid and sebacic acid when the temperature is raised to 65-75 ℃, and stirring to raise the temperature;
(2) slowly adding an aqueous solution of lithium hydroxide monohydrate when the temperature is increased to 85-95 ℃, rapidly stirring, and adding an aqueous solution of boric acid when the temperature is increased to 100 ℃ and 110 ℃;
(3) dewatering, wherein the dewatering time is not less than 3 hours to ensure complete saponification;
(4) after dehydration is completed, rapidly heating to 165-175 ℃, adding glycerol, uniformly stirring, heating for refining at high temperature, heating to 200-220 ℃, and keeping the temperature for 10 min;
(5) when the temperature is reduced to below 120 ℃, adding molybdenum disulfide powder, molybdenum dialkyl dithio formate, pour point depressant, barium petroleum sulfate and graphite at one time, and stirring uniformly;
(6) grinding, shearing, filtering, adjusting consistency as required, discharging fat and packaging.
The technical scheme of the invention has the following beneficial effects:
the product is thickened by lithium soap, so that the dropping point is more than 280 ℃. The pour point depressant is added into the base oil, the condensation point of the polyalphaolefin synthetic oil and the alkyl naphthalene can reach-60 ℃, and the condensation point of the product is reduced to reach-45 ℃. The product has good mechanical stability, extreme pressure property and water resistance. In addition, the lubricant also contains a compound sulfur additive, so that the extreme pressure wear resistance is improved, and the friction coefficient is reduced. And the antirust preservative is added, so that the corrosion resistance of the product is further improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
Example one
The embodiment provides graphite high-temperature synthetic lubricating grease which is prepared from the following raw materials in parts by weight: 72 parts of base oil, 11 parts of dodecahydroxy stearic acid, 3 parts of stearic acid, 0.3 part of glycerol, 4 parts of lithium hydroxide monohydrate, 1.6 parts of boric acid, 0.1 part of sebacic acid, 2.5 parts of molybdenum disulfide powder, 1.4 parts of molybdenum dialkyl dithioformate, 1.4 parts of pour point depressant, 3.5 parts of barium petroleum sulfate and 3.3 parts of graphite.
The base oil is a mixture of mineral oil and silicone oil in a ratio of 1: 1.
The content of the dodecahydroxystearic acid is more than 95 percent, the content of the stearic acid is more than 90 percent, the content of the glycerol is more than 95 percent, the content of the lithium hydroxide monohydrate is more than 90 percent, the content of the boric acid is more than 95 percent, and the content of the sebacic acid is more than 95 percent.
The molybdenum disulfide has a molybdenum number of 2200 molybdenum.
The preparation method of the graphite high-temperature synthetic lubricating grease comprises the following steps:
(1) adding the base oil into a saponification kettle, stirring and mixing, heating to raise the temperature, adding the dodecahydroxystearic acid, the stearic acid and the sebacic acid when the temperature is raised to 67 ℃, and stirring to raise the temperature;
(2) slowly adding the aqueous solution of lithium hydroxide monohydrate when the temperature is raised to 86 ℃, quickly stirring, and adding the aqueous solution of boric acid when the temperature is raised to 101 ℃;
(3) dewatering, wherein the dewatering time is not less than 3 hours to ensure complete saponification;
(4) after dehydration is completed, rapidly heating to 166 ℃, adding glycerol, uniformly stirring, heating for refining at high temperature, and keeping the temperature for 10min after the temperature is raised to 202 ℃;
(5) when the temperature is reduced to below 120 ℃, adding molybdenum disulfide powder, molybdenum dialkyl dithio formate, pour point depressant, barium petroleum sulfate and graphite at one time, and stirring uniformly;
(6) grinding, shearing, filtering, adjusting consistency as required, discharging fat and packaging.
Example two
The embodiment provides graphite high-temperature synthetic lubricating grease which is prepared from the following raw materials in parts by weight: 74 parts of base oil, 12 parts of dodecahydroxy stearic acid, 4 parts of stearic acid, 0.4 part of glycerol, 6 parts of lithium hydroxide monohydrate, 1.7 parts of boric acid, 0.2 part of sebacic acid, 3 parts of molybdenum disulfide powder, 1.8 parts of molybdenum dialkyl dithiocarbamate, 1.8 parts of pour point depressant, 4 parts of petroleum barium sulfate and 3.6 parts of graphite.
The base oil is a mixture of silicone oil and poly-alpha-olefin synthetic oil in a ratio of 1: 1.
The content of the dodecahydroxystearic acid is more than 95 percent, the content of the stearic acid is more than 90 percent, the content of the glycerol is more than 95 percent, the content of the lithium hydroxide monohydrate is more than 90 percent, the content of the boric acid is more than 95 percent, and the content of the sebacic acid is more than 95 percent.
The molybdenum number of the molybdenum disulfide is 2300 molybdenum.
The preparation method of the graphite high-temperature synthetic lubricating grease comprises the following steps:
(1) adding the base oil into a saponification kettle, stirring and mixing, heating to raise the temperature, adding the dodecahydroxystearic acid, the stearic acid and the sebacic acid when the temperature is raised to 69 ℃, and stirring to raise the temperature;
(2) slowly adding the aqueous solution of lithium hydroxide monohydrate when the temperature is raised to 88 ℃, quickly stirring, and adding the aqueous solution of boric acid when the temperature is raised to 103 ℃;
(3) dewatering, wherein the dewatering time is not less than 3 hours to ensure complete saponification;
(4) after dehydration is completed, rapidly heating to 168 ℃, adding glycerol, uniformly stirring, heating for refining at high temperature, and keeping the temperature for 10min after the temperature is increased to 206 ℃;
(5) when the temperature is reduced to below 120 ℃, adding molybdenum disulfide powder, molybdenum dialkyl dithio formate, pour point depressant, barium petroleum sulfate and graphite at one time, and stirring uniformly;
(6) grinding, shearing, filtering, adjusting consistency as required, discharging fat and packaging.
EXAMPLE III
The embodiment provides graphite high-temperature synthetic lubricating grease which is prepared from the following raw materials in parts by weight: 76 parts of base oil, 12.5 parts of dodecahydroxy stearic acid, 5 parts of stearic acid, 0.6 part of glycerol, 7 parts of lithium hydroxide monohydrate, 1.8 parts of boric acid, 0.3 part of sebacic acid, 3.5 parts of molybdenum disulfide powder, 2.2 parts of molybdenum dialkyl dithiocarbamate, 2.2 parts of pour point depressant, 4.5 parts of barium petroleum sulfate and 4 parts of graphite.
The base oil is a mixture of mineral oil, silicone oil and poly-alpha-olefin synthetic oil; the ratio was 5:1: 5.
The content of the dodecahydroxystearic acid is more than 95 percent, the content of the stearic acid is more than 90 percent, the content of the glycerol is more than 95 percent, the content of the lithium hydroxide monohydrate is more than 90 percent, the content of the boric acid is more than 95 percent, and the content of the sebacic acid is more than 95 percent.
The molybdenum number of the molybdenum disulfide is 2500 molybdenum.
The preparation method of the graphite high-temperature synthetic lubricating grease comprises the following steps:
(1) adding the base oil into a saponification kettle, stirring and mixing, heating to raise the temperature, adding the dodecahydroxystearic acid, the stearic acid and the sebacic acid when the temperature is raised to 71 ℃, and stirring to raise the temperature;
(2) slowly adding the aqueous solution of lithium hydroxide monohydrate when the temperature is raised to 90 ℃, quickly stirring, and adding the aqueous solution of boric acid when the temperature is raised to 105 ℃;
(3) dewatering, wherein the dewatering time is not less than 3 hours to ensure complete saponification;
(4) after dehydration is completed, rapidly heating to 170 ℃, adding glycerol, uniformly stirring, heating for refining at high temperature, and keeping the temperature for 10min after the temperature is increased to 210 ℃;
(5) when the temperature is reduced to below 120 ℃, adding molybdenum disulfide powder, molybdenum dialkyl dithio formate, pour point depressant, barium petroleum sulfate and graphite at one time, and stirring uniformly;
(6) grinding, shearing, filtering, adjusting consistency as required, discharging fat and packaging.
Example four
The embodiment provides graphite high-temperature synthetic lubricating grease which is prepared from the following raw materials in parts by weight: 77 parts of base oil, 13 parts of dodecahydroxy stearic acid, 6 parts of stearic acid, 0.8 part of glycerol, 8 parts of lithium hydroxide monohydrate, 1.9 parts of boric acid, 0.4 part of sebacic acid, 4 parts of molybdenum disulfide powder, 2.6 parts of molybdenum dialkyl dithiocarbamate, 2.6 parts of pour point depressant, 5 parts of petroleum barium sulfate and 4.4 parts of graphite.
The base oil is a mixture of mineral oil and poly-alpha-olefin synthetic oil, and the ratio is avoided to be 2: 1.
The content of the dodecahydroxystearic acid is more than 95 percent, the content of the stearic acid is more than 90 percent, the content of the glycerol is more than 95 percent, the content of the lithium hydroxide monohydrate is more than 90 percent, the content of the boric acid is more than 95 percent, and the content of the sebacic acid is more than 95 percent.
The molybdenum number of the molybdenum disulfide is 2700.
The preparation method of the graphite high-temperature synthetic lubricating grease comprises the following steps:
(1) adding the base oil into a saponification kettle, stirring and mixing, heating to raise the temperature, adding the dodecahydroxystearic acid, the stearic acid and the sebacic acid when the temperature is raised to 72 ℃, and stirring to raise the temperature;
(2) slowly adding the aqueous solution of lithium hydroxide monohydrate when the temperature is raised to 92 ℃, quickly stirring, and adding the aqueous solution of boric acid when the temperature is raised to 107 ℃;
(3) dewatering, wherein the dewatering time is not less than 3 hours to ensure complete saponification;
(4) after dehydration is completed, rapidly heating to 172 ℃, adding glycerol, uniformly stirring, heating for refining at high temperature, and keeping the temperature for 10min after the temperature is raised to 214 ℃;
(5) when the temperature is reduced to below 120 ℃, adding molybdenum disulfide powder, molybdenum dialkyl dithio formate, pour point depressant, barium petroleum sulfate and graphite at one time, and stirring uniformly;
(6) grinding, shearing, filtering, adjusting consistency as required, discharging fat and packaging.
EXAMPLE five
The embodiment provides graphite high-temperature synthetic lubricating grease which is prepared from the following raw materials in parts by weight: 78 parts of base oil, 14 parts of dodecahydroxy stearic acid, 7 parts of stearic acid, 0.9 part of glycerol, 10 parts of lithium hydroxide monohydrate, 2 parts of boric acid, 0.5 part of sebacic acid, 5 parts of molybdenum disulfide powder, 2.8 parts of molybdenum dialkyl dithiocarbamate, 2.5 parts of pour point depressant, 6 parts of petroleum barium sulfate and 4.7 parts of graphite.
The base oil is a mixture of mineral oil, silicone oil and poly-alpha-olefin synthetic oil in a ratio of 1:1: 1.
The content of the dodecahydroxystearic acid is more than 95 percent, the content of the stearic acid is more than 90 percent, the content of the glycerol is more than 95 percent, the content of the lithium hydroxide monohydrate is more than 90 percent, the content of the boric acid is more than 95 percent, and the content of the sebacic acid is more than 95 percent.
The molybdenum number of the molybdenum disulfide is 2900 molybdenum.
The preparation method of the graphite high-temperature synthetic lubricating grease comprises the following steps:
(1) adding the base oil into a saponification kettle, stirring and mixing, heating to raise the temperature, adding the dodecahydroxystearic acid, the stearic acid and the sebacic acid when the temperature is raised to 74 ℃, and stirring to raise the temperature;
(2) slowly adding the aqueous solution of lithium hydroxide monohydrate when the temperature is raised to 94 ℃, quickly stirring, and adding the aqueous solution of boric acid when the temperature is raised to 108 ℃;
(3) dewatering, wherein the dewatering time is not less than 3 hours to ensure complete saponification;
(4) after dehydration is completed, quickly heating to 173 ℃, adding glycerol, uniformly stirring, heating for high-temperature refining, and keeping the temperature for 10min after the temperature is increased to 217 ℃;
(5) when the temperature is reduced to below 120 ℃, adding molybdenum disulfide powder, molybdenum dialkyl dithio formate, pour point depressant, barium petroleum sulfate and graphite at one time, and stirring uniformly;
(6) grinding, shearing, filtering, adjusting consistency as required, discharging fat and packaging.
The finished products obtained in examples 1 to 5 were examined and the quality indices were as follows:
while the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. The graphite high-temperature synthetic lubricating grease is prepared from the following raw materials in parts by weight: 70-80 parts of base oil, 10-15 parts of dodecahydroxy stearic acid, 2-8 parts of stearic acid, 0.2-1 part of glycerol, 3-12 parts of lithium hydroxide monohydrate, 1.5-2 parts of boric acid, 0.1-0.6 part of sebacic acid, 2-6 parts of molybdenum disulfide powder, 1-3 parts of molybdenum dialkyl dithiocarbamate, 1-3 parts of pour point depressant, 3-7 parts of barium petroleum sulfate and 3-5 parts of graphite.
2. The graphite high temperature synthetic grease of claim 1 wherein: the base oil is one or more of mineral oil, silicone oil and poly-alpha-olefin synthetic oil.
3. The graphite high temperature synthetic grease of claim 1 wherein: the content of the dodecahydroxystearic acid is more than 95 percent, the content of the stearic acid is more than 90 percent, the content of the glycerol is more than 95 percent, the content of the lithium hydroxide monohydrate is more than 90 percent, the content of the boric acid is more than 95 percent, and the content of the sebacic acid is more than 95 percent.
4. The graphite high temperature synthetic grease of claim 1 wherein: the molybdenum number of the molybdenum disulfide is 2000-3000 molybdenum.
5. The graphite high temperature synthetic grease of claim 1 wherein: the graphite high-temperature synthetic lubricating grease is prepared from the following raw materials in parts by weight: 70-80 parts of base oil, 10-15 parts of dodecahydroxy stearic acid, 2-8 parts of stearic acid, 0.2-1 part of glycerol, 3-12 parts of lithium hydroxide monohydrate, 1.5-2 parts of boric acid, 0.1-0.6 part of sebacic acid, 2-6 parts of molybdenum disulfide powder, 1-3 parts of molybdenum dialkyl dithiocarbamate, 1-3 parts of pour point depressant, 3-7 parts of barium petroleum sulfate and 3-5 parts of graphite.
6. A method for preparing graphite high-temperature synthetic grease based on any one of claims 1-5, which is characterized in that: the method comprises the following steps:
(1) adding base oil into a saponification kettle, stirring and mixing, heating to raise the temperature, adding dodecahydroxystearic acid, stearic acid and sebacic acid when the temperature is raised to 65-75 ℃, and stirring to raise the temperature;
(2) slowly adding an aqueous solution of lithium hydroxide monohydrate when the temperature is increased to 85-95 ℃, rapidly stirring, and adding an aqueous solution of boric acid when the temperature is increased to 100 ℃ and 110 ℃;
(3) dewatering, wherein the dewatering time is not less than 3 hours to ensure complete saponification;
(4) after dehydration is completed, rapidly heating to 165-175 ℃, adding glycerol, uniformly stirring, heating for refining at high temperature, heating to 200-220 ℃, and keeping the temperature for 10 min;
(5) when the temperature is reduced to below 120 ℃, adding molybdenum disulfide powder, molybdenum dialkyl dithio formate, pour point depressant, barium petroleum sulfate and graphite at one time, and stirring uniformly;
(6) grinding, shearing, filtering, adjusting consistency as required, discharging fat and packaging.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116925833A (en) * | 2023-06-08 | 2023-10-24 | 深圳市合诚润滑材料有限公司 | A kind of grease for automobile constant velocity universal joint |
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