CN116857564A - Oil drag reducer containing silicone oil and preparation method thereof - Google Patents

Abstract

The invention discloses a silicone oil-containing oil drag reducer and a preparation method thereof. The oil drag reducer comprises the following components: the poly alpha-olefin accounts for 15 to 35 percent of the total weight of the drag reducer slurry, the silicone oil accounts for 1 to 10 percent of the total weight of the drag reducer slurry, the anti-blocking agent accounts for 2 to 16 percent of the total weight of the drag reducer slurry, the alcohol ether dispersant accounts for 44 to 65 percent of the total weight of the drag reducer slurry, and the density regulator accounts for 3 to 20 percent of the total weight of the drag reducer slurry; the mass sum of the poly alpha-olefin, the silicone oil, the anti-blocking agent, the alcohol ether dispersant and the density regulator is 100 percent. The drag reducer has good stability, and does not delaminate or agglomerate in three months at normal temperature. The drag reduction rate of the crude oil drag reducer is evaluated by using the indoor loop evaluation device, so that a good drag reduction and transmission increasing effect can be achieved.

Description

Oil drag reducer containing silicone oil and preparation method thereof

Technical Field

The invention belongs to the technical field of drag reducers, and particularly relates to an oil drag reducer containing silicone oil and a preparation method thereof.

Background

The pipeline transportation is used as a main transportation mode of the finished oil and the crude oil, has the advantages of large transportation quantity, low cost, low energy consumption, long transportation distance, small influence by natural conditions and the like, but has the defects that the pipeline transportation has relatively poorer adjustability than that of highway, railway and marine transportation. How to reasonably regulate and control the pipe conveying amount of pipeline transportation is a relatively troublesome problem. In recent years, with the rapid increase of the demand of petroleum products, the petroleum transportation quantity is increased year by year, the development of an oil-gas pipe network system is rapid, and the improvement of the pipeline transportation quantity is urgent. At present, the total internal length of the oil and gas pipeline in China is 16.5 ten thousand kilometers, and the energy loss in the pipeline transportation process is huge due to the along-path friction resistance in the pipeline transportation process. In the past, people often adopt modes such as heating, adding middle pump station and add pipeline to improve oil delivery volume, but have a plurality of disadvantages such as high energy consumption, little operation elasticity, existence of potential safety hazard etc..

The oil drag reducer is a chemical additive applied to oil pipeline transportation, and can greatly reduce the friction resistance of the oil under the condition of unchanged oil delivery, thereby reducing the delivery pressure of a pipeline; the throughput of the pipeline can be increased without changing the pipeline operating pressure. Compared with the traditional method, the delivery of crude oil can be rapidly increased by adding a trace amount of oil drag reducer into an oil delivery pipeline, and the method has adjustability and becomes a large interest in drag reduction and delivery of oil. The drag reducer is a chemical auxiliary agent which can reduce the fluid conveying pressure by adding a small amount, is mostly a water-soluble or oil-soluble high polymer, and has the advantages of low investment, convenient filling, energy saving, consumption reduction and the like. Since 1979 when oil-soluble drag reducers were first used in crude oil delivery pipelines, the development of drag reducers was extremely rapid. The friction resistance of a pipeline system can be reduced by utilizing the drag reducer, the transmission and consumption are increased, the investment is saved, and the method has important practical significance for accelerating the development of petrochemical industry.

At present, the drag reduction polymer with better drag reduction effect is a poly alpha-olefin which is a nonpolar polymer and can be quickly dissolved in oil, and the drag reduction polymer is in a comb-shaped structure in oil flow, so that the flow resistance of the oil in a turbulent flow state can be effectively reduced; however, the production conditions are difficult to control, and strict anhydrous and anaerobic conditions are required. Generally, the higher the molecular weight of the poly-alpha-olefin, the higher the drag reduction rate of the drag reducer, and the better the relief of the flow resistance of the oil product.

The molecular weight of poly alpha-olefin used in industry is up to millions or even tens of millions, and the poly alpha-olefin is viscoelastic solid at normal temperature and can not be normally injected without treatment. For convenience in use, poly-alpha-olefins are usually processed into powder particles for use, but there are still some problems, such as agglomeration, adhesion, delamination, etc., when stored for a certain time at normal temperature, which are unfavorable for transportation, use and storage.

The production technology of the oil drag reducer has two key points: (1) synthesis of ultra-high molecular weight polyalphaolefins; (2) post-treatment process. Wherein the post-treatment process includes composition investigation of the drag reducer.

Chinese patent CN101544766a relates to a method for preparing a suspension of poly-alpha-olefin drag reducer, which comprises poly-alpha-olefin, long carbon chain amide and solvent, and suspending stabilizer, thickener, dispersant and surfactant are added to stabilize the suspension system. Firstly, long carbon chain amide, surfactant and solvent need to be emulsified for several hours at 40-50 ℃, and then crushed poly alpha-olefin, surfactant, thickener, suspending agent and the like are added to prepare the drag reducer. The drag reducer prepared by the method can be stable for 24 months at normal temperature, but components except the poly alpha-olefin cannot be emulsified at low temperature, otherwise, the drag reducer prepared by adding the poly alpha-olefin is easy to layer.

Chinese patent CN105218720a discloses a solution in-situ synthesis method of composite drag reducer, which is prepared from nano-SiO-containing solution ₂ The polyolefin is prepared by dissolving n-heptane or diesel oil, has better shearing resistance, but is inconvenient to store and use.

The existing suspension liquid system technology of the oil drag reducer has certain defects, and the problems of precipitation, sedimentation, agglomeration, layering and the like of active ingredients can be unavoidable in the industrial production process. The reasons for this are, on the one hand, the inability to control the molecular weight distribution of the polyalphaolefins very well and, on the other hand, the inadequate level of work-up technology or the inadequate formulation.

Disclosure of Invention

The invention aims to: the invention aims to overcome the defects of the prior art and provides a silicon oil-containing oil drag reducer. The oil drag reducer solves the problem of insufficient stability commonly existing in the existing drag reducer under the condition of ensuring good drag reduction rate.

The technical scheme is as follows: the aim of the invention is achieved by the following technical scheme:

the invention provides a silicone oil-containing oil drag reducer, which comprises the following components: 15-35 wt% of poly alpha-olefin, 1-10 wt% of silicone oil, 2-16 wt% of anti-blocking agent, 44-65 wt% of alcohol ether dispersant and 3-20 wt% of density regulator; wherein, the mass sum of the poly alpha-olefin, the silicone oil, the anti-blocking agent, the alcohol ether dispersant and the density regulator is 100 percent.

The invention has the advantages that as the silicone oil is contained, the invention can play a role in preventing the secondary agglomeration of poly alpha-olefin; the existence of the silicone oil enables the solid anti-blocking agent to be easily wrapped on the surface of the poly alpha-olefin, which is beneficial to the stability of the drag reducer product.

Preferably, the molecular weight of the polyalphaolefin is 600 to 1000 tens of thousands.

Further preferably, the molecular weight of the polyalphaolefin is 800 to 1000 tens of thousands. The higher the molecular weight is, the better the drag reduction effect of the poly alpha-olefin is, and the molecular weight of the poly alpha-olefin in China is generally below 500 ten thousand at present.

Preferably, the viscosity of the silicone oil at 25 ℃ is 5-200 cst. Silicone oils as reaction solvents, too high a viscosity, which is detrimental to the dispersion of the polyolefin product, can cause increased poly-alpha-olefin particles; the larger the particles are, the poorer the solubility of the poly-alpha-olefin in the oil product, and in order to reduce the particles of the poly-alpha-olefin, the post-treatment is generally required by a low-temperature freezing and crushing method, and the generated poly-alpha-olefin particles are large and inconvenient for the post-treatment.

Further preferably, the silicone oil is selected from one of phenyl methyl silicone oil or dimethyl silicone oil.

Preferably, the anti-blocking agent is selected from one or more of sodium dodecyl benzene sulfonate, calcium stearate, zinc stearate, magnesium stearate, aluminum stearate, talcum powder, ethylene bis stearamide or polyamide wax. The anti-blocking agent can be wrapped on the surface of the polyolefin particles to play a certain role in isolation, so as to prevent the polyolefin particles from further agglomerating. The sodium dodecyl benzene sulfonate, the calcium stearate, the zinc stearate, the magnesium stearate, the aluminum stearate, the talcum powder, the ethylene bis stearamide and the polyamide wax all have polar bonds, and repulsive force exists between particles after the particles are wrapped on the surface of the poly alpha-olefin, so that the anti-adhesion effect is achieved.

Further preferably, the anti-blocking agent is selected from one or more of talc, ethylene bis stearamide or polyamide wax.

Preferably, the alcohol ether dispersant is selected from one or more of isobutanol, n-amyl alcohol, tertiary amyl alcohol, n-hexyl alcohol, n-octyl alcohol, isooctyl alcohol, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol dimethyl ether or diethylene glycol monobutyl ether.

Further preferably, the alcohol ether dispersant is one or more selected from n-amyl alcohol, n-octyl alcohol, isooctyl alcohol, diethylene glycol monomethyl ether, diethylene glycol diethyl ether and diethylene glycol monobutyl ether.

Preferably, in the alcohol ether dispersant, the mass ratio of alcohol to ether is 40-55: 1 to 8.

Preferably, the density regulator is one or more selected from glycerol, diglycerol, triglycerol, N-dimethylformamide or dioxane.

Further, the density regulator is selected from one or more of diglycerol, triglycerol or N, N-dimethylformamide.

The invention also provides a preparation method of the oil drag reducer, which comprises the following steps:

(1) After the polymerization reaction is completed, utilizing a centrifugal solid-liquid separator to carry out solid-liquid separation, filtering polyolefin suspended in silicone oil,

(2) Mixing the filter cake, namely poly alpha-olefin, with an anti-blocking agent, and fully mixing the two by utilizing a pushing three-blade stirring and dispersing device; sequentially adding a metered alcohol ether dispersing agent and a density regulator into the mixture, and carrying out uniform dispersion for 1.5 hours by a high-speed shearing machine at the temperature of 0-10 ℃ to obtain uniform and stable white slurry, namely the drag reducer.

Preferably, the amount of residual silicone oil in the polyalphaolefin is from 3 to 21% of the total weight of polyalphaolefin.

When the additive amount of the drag reducer for oil products is 20ppm, the friction reducer has the increasing and outputting rate of not less than 50 percent.

The beneficial effects are that:

the drag reducer for oil products of the invention mainly comprises poly alpha-olefin with ultra-high molecular weight, silicone oil, anti-blocking agent, alcohol ether dispersant and density regulator. The poly alpha-olefin is mainly used for drag reduction, the silicone oil can play a certain role in isolation, and the probability of poly alpha-olefin particle agglomeration is reduced; the anti-blocking agent can further avoid the agglomeration of poly alpha-olefin particles; the alcohol ether substance can play a certain role in dispersing, but the density of the alcohol ether dispersing agent is less than that of poly alpha-olefin, so that the product stability is improved by using a density regulator, and layering is avoided. The silicone oil, the alcohol ether dispersant and the density regulator form a mutual-soluble system, the anti-blocking agent powder and the poly alpha-olefin are suspended in the solution, and the components are synergistic, so that the stability of the drag reducer is improved, the phenomenon of layering, caking or agglomeration easily occurring in the use and storage processes of the drag reducer is avoided, and the filling of the drag reducer product is facilitated. The drag reducer product has the advantages of good stability, low production cost, simple preparation method, environmental protection and the like.

Detailed Description

The technical scheme of the present invention is described in detail below through specific examples, but the scope of the present invention is not limited to the examples.

The specific techniques or conditions are not identified in the examples and are described in the literature in this field or are carried out in accordance with the product specifications. The reagents or equipment used were conventional products available for purchase through regular channels, with no manufacturer noted.

The experimental methods in the following examples are conventional methods unless otherwise specified. The test materials used in the examples described below, unless otherwise specified, are all commercially available products.

The polyalphaolefins in the examples were synthesized using a company-independent development process: the method is characterized in that n-olefin with carbon chain length in a range of C3-C22, preferably C6-C14, is selected as a polymerization monomer, a supported high-activity Ziegler-Natta catalyst containing a special internal electron donor is utilized to cooperate with alkyl aluminum such as triethyl aluminum, triisobutyl aluminum or diethyl aluminum chloride and external electron donor organosiloxane such as diisopropyl dimethoxy silane, diphenyl dimethoxy silane or dimethoxy dicyclopentyl siloxane to form a high-efficiency catalytic system, olefin monomer polymerization is catalyzed, and alpha-olefin polymer is synthesized at low temperature and normal pressure. The small poly alpha-olefin particles generated in the reaction are suspended in inert silicone oil, and the white loose poly alpha-olefin containing silicone oil is obtained through filtering after the reaction is completed.

After the polymerization reaction is completed, solid-liquid separation is performed by using a centrifugal solid-liquid separator, and the polyolefin suspended in the silicone oil is filtered. In the embodiment of the invention, the silicone oil is remained in the loose poly-alpha-olefin, the silicone oil, the poly-alpha-olefin and the anti-blocking agent are still in a solid state.

Because the particle size of the adopted catalyst is small, the average particle size of the obtained poly-alpha-olefin is less than 500 mu m, and the weight average molecular weight is more than 600 ten thousand. The poly-alpha-olefin involved in the preparation of the drag reducer is not limited to poly-alpha-olefin synthesized by adopting the autonomous development process of the company; polyalphaolefins meeting the above conditions can be used in the preparation of the drag reducing agent of the present invention.

The polyamide wax referred to in the examples is from Shanghai suitable coating industry under the trade designation T-6650.

Example 1

The silicon oil-containing drag reducer comprises the following components in percentage by mass:

phenyl methyl silicone oil (5 cst): 4.2%;

polyalphaolefins (weight average molecular weight 607 ten thousand, particle size 400 μm): 15.8%;

talc powder: 2.0%;

n-amyl alcohol: 6.0%;

n-octanol: 46.0%;

diethylene glycol monobutyl ether: 8.0%;

glycerol: 9.0%;

n, N-dimethylformamide: 9.0%.

The preparation method comprises the following steps:

according to the mass percentage of the components, 40.0g of loose poly alpha-olefin solid (phenyl methyl silicone oil content is 21%) is weighed into a 500ml beaker, 4.0g of talcum powder is weighed and added into the beaker, and the loose poly alpha-olefin solid and the phenyl methyl silicone oil are fully mixed by using a pushing three-blade stirring and dispersing device; 12.0g of n-amyl alcohol, 92.0g of n-octyl alcohol, 16.0g of diethylene glycol monobutyl ether, 18.0g of glycerol and 18.0g of N, N-dimethylformamide are weighed and added into the solid, and the uniform dispersion is carried out for 1.5 hours by a high-speed shearing machine at the temperature of 0-10 ℃ to obtain uniform and stable drag reducer slurry. The materials are not agglomerated or layered within three months.

Example 2

The silicon oil-containing drag reducer comprises the following components in percentage by mass:

simethicone (10 cst): 1.4%;

poly alpha-olefins (weight average molecular weight 820 ten thousand, particle size 490 μm): 34.8%;

polyamide wax powder: 8.0%;

ethylene bis stearamide: 7.8%;

n-amyl alcohol: 3.0%;

isooctanol: 39.0%;

diethylene glycol monobutyl ether: 2.0%;

triglycerin: 4.0%.

The preparation method comprises the following steps:

according to the mass percentage of the components, 71.0g of loose poly alpha-olefin solid (the content of the simethicone is 4.0 percent) is weighed into a 500ml beaker, 15.7g of polyamide wax powder and 15.3g of ethylene bis stearamide are weighed and added into the beaker, and the two materials are fully mixed by utilizing a pushing three-blade stirring and dispersing device; 5.9g of n-amyl alcohol, 76.5g of isooctanol, 3.9g of diethylene glycol monobutyl ether and 7.8g of triglycerin are weighed and added into the solid, and the mixture is subjected to homogenizing and dispersing for 1.5 hours by a high-speed shearing machine at the temperature of 0-10 ℃ to obtain uniform and stable drag reducer slurry. The materials are not agglomerated or layered within three months.

Example 3

The silicon oil-containing drag reducer comprises the following components in percentage by mass:

simethicone (50 cst): 5.0%;

poly alpha-olefins (weight average molecular weight 785 ten thousand, particle size 380 μm): 26.0%;

talc powder: 8.0%;

isobutanol: 7.0%;

isooctanol: 45.0%;

diethylene glycol monoethyl ether: 2.0%;

triglycerin: 7.0%.

The preparation method comprises the following steps:

according to the mass percentage of the components, weighing 75g of loose poly alpha-olefin solid (the content of the simethicone is 16 percent) into a 500ml beaker, then weighing 19.4g of talcum powder, adding the talcum powder into the beaker, and fully mixing the two by utilizing a pushing three-blade stirring and dispersing device; 16.9g of isobutanol, 108.9g of isooctanol, 4.8g of diethylene glycol monoethyl ether and 16.9g of triglycerin are weighed and added into the solid, and the solid is subjected to homogenizing and dispersing for 1.5 hours by a high-speed shearing machine at the temperature of 0-10 ℃ to obtain uniform and stable drag reducer slurry. The materials are not agglomerated or layered within three months.

Example 4

The silicon oil-containing drag reducer comprises the following components in percentage by mass:

simethicone (150 cst): 5.0%;

polyalphaolefins (weight average molecular weight 830 ten thousand, particle size 350 μm): 26.5%;

talc powder: 3.5%;

polyamide wax: 3.5%;

tertiary amyl alcohol: 5.0%;

isooctanol: 44.5%;

diethylene glycol monomethyl ether: 3.0%;

diglycerol: 9.0%.

The preparation method comprises the following steps:

according to the mass percentage of the components, 72g of loose poly alpha-olefin solid (the content of the simethicone is 16%) is weighed into a 500ml beaker, 8.0g of talcum powder and 8.0g of polyamide wax are weighed and added, and the two materials are fully mixed by utilizing a pushing three-blade stirring and dispersing device; 11.4g of tertiary amyl alcohol, 101.7g of isooctyl alcohol, 6.9g of diethylene glycol monomethyl ether and 20.6g of diglycerol are weighed and added into the solid, and the mixture is subjected to homogenizing and dispersing for 1.5 hours by a high-speed shearing machine at the temperature of 0-10 ℃ to obtain uniform and stable drag reducer slurry. The materials are not agglomerated or layered within three months.

Example 5

The silicon oil-containing drag reducer comprises the following components in percentage by mass:

simethicone (200 cst): 5.3%;

poly alpha-olefins (weight average molecular weight 811 ten thousand, particle size 420 μm): 25.7%;

polyamide wax powder: 6.0%;

tertiary amyl alcohol: 6.0%;

isooctanol: 48.0%;

diethylene glycol monobutyl ether: 3.0%;

triglycerin: 6.0%.

The preparation method comprises the following steps:

according to the mass percentage of the components, 81g of loose poly alpha-olefin solid (the content of the simethicone is 17%) is weighed into a 500ml beaker, 15.7g of polyamide wax powder is weighed and added, and the two are fully mixed by utilizing a pushing three-blade stirring and dispersing device; 15.7g of tertiary amyl alcohol, 125.4g of isooctyl alcohol, 7.8g of diethylene glycol monomethyl ether and 15.7g of triglycerin are weighed and added into the solid, and the mixture is subjected to homogenizing and dispersing for 1.5 hours by a high-speed shearing machine at the temperature of 0-10 ℃ to obtain uniform and stable drag reducer slurry. The materials are not agglomerated or layered within three months.

Example 6

The silicon oil-containing drag reducer comprises the following components in percentage by mass:

phenyl methyl silicone oil (200 cst): 3.0%;

poly alpha-olefins (weight average molecular weight 809 ten thousand, particle size 430 μm): 25.0%;

10.0% of polyamide wax powder;

tertiary amyl alcohol: 6.0%;

isooctanol: 48.0%;

diethylene glycol monobutyl ether: 2.0%;

triglycerin: 6.0%.

The preparation method comprises the following steps:

according to the mass percentage of the components, 91g of loose poly alpha-olefin solid (the phenyl methyl silicone oil content is 11%) is weighed into a 500ml beaker, 32.5g of polyamide wax powder is weighed and added, and the two are fully mixed by utilizing a pushing three-blade stirring and dispersing device; 19.5g of tertiary amyl alcohol, 156.0g of isooctyl alcohol, 6.5g of diethylene glycol monomethyl ether and 19.5g of triglycerin are weighed and added into the solid, and the mixture is subjected to homogenizing and dispersing for 1.5 hours by a high-speed shearing machine at the temperature of 0-10 ℃ to obtain uniform and stable drag reducer slurry. The materials are not agglomerated or layered within three months.

Example 7

The silicon oil-containing drag reducer comprises the following components in percentage by mass:

phenyl methyl silicone oil (5 cst): 6.1%;

poly alpha-olefins (weight average molecular weight 910 ten thousand, particle size 320 μm): 28.0%;

polyamide wax powder: 5.0%;

tertiary amyl alcohol: 5.0%;

isooctanol: 47.0%;

diethylene glycol monobutyl ether: 3.0%;

triglycerin: 5.9%.

The preparation method comprises the following steps:

according to the mass percentage of the components, weighing 95g of loose poly alpha-olefin solid (phenyl methyl silicone oil content is 18%) into a 500ml beaker, then weighing 13.9g of polyamide wax powder, adding the polyamide wax powder into the beaker, and fully mixing the two by utilizing a pushing three-blade stirring and dispersing device; 13.9g of tertiary amyl alcohol, 130.9g of isooctyl alcohol, 8.4g of diethylene glycol monobutyl ether and 16.4g of triglycerin are weighed and added into the solid, and the mixture is subjected to homogenizing and dispersing for 1.5 hours by a high-speed shearing machine at the temperature of 0-10 ℃ to obtain uniform and stable drag reducer slurry. The materials are not agglomerated or layered within three months.

Comparative example 1

The silicon oil-containing drag reducer comprises the following components in percentage by mass:

poly alpha-olefins (weight average molecular weight 780 ten thousand, particle size 370 μm): 25.4%;

polyamide wax powder: 5.0%;

tertiary amyl alcohol: 5.0%;

isooctanol: 51.0%;

diethylene glycol monobutyl ether: 7.0%;

triglycerin: 6.6%.

The preparation method comprises the following steps:

according to the mass percentage of each component, 100g of poly alpha-olefin solid without silicone oil is weighed in a 500ml beaker, 19.7g of polyamide wax powder is weighed and added, and the two are fully mixed by utilizing a pushing three-blade stirring and dispersing device; 19.7g of tertiary amyl alcohol, 200.8g of isooctyl alcohol, 27.6g of diethylene glycol monobutyl ether and 26.0g of triglycerin are weighed and added into the solid, and the mixture is subjected to homogenizing and dispersing for 1.5 hours by a high-speed shearing machine at the temperature of 0-10 ℃ to obtain uniform and stable drag reducer slurry. Layering occurs within a week, and poly alpha-olefin agglomeration occurs.

Comparative example 2

The silicon oil-containing drag reducer comprises the following components in percentage by mass:

simethicone (5 cst): 5.9%;

poly alpha-olefins (weight average molecular weight 815 ten thousand, particle size 390 μm): 25.0%;

tertiary amyl alcohol: 7.4%;

isooctanol: 46.5%;

diethylene glycol monobutyl ether: 8.5%;

triglycerin: 6.7%.

The preparation method comprises the following steps:

according to the mass percentage of the components, 98g of loose poly alpha-olefin solid (the content of the simethicone is 19%) is weighed in a 500ml beaker, and is dispersed into small particles by utilizing a pushing three-blade stirring dispersion device; 23.5g of tertiary amyl alcohol, 147.5g of isooctyl alcohol, 27.0g of diethylene glycol monomethyl ether and 21.2g of triglycerin are weighed and added into the solid, and the mixture is subjected to homogenizing and dispersing for 1.5 hours by a high-speed shearing machine at the temperature of 0-10 ℃ to obtain uniform and stable drag reducer slurry. Layering is carried out within three days, and poly alpha-olefin agglomeration phenomenon occurs.

The indoor loop effect test standard and method are as follows:

the drag reduction effect of the drag reducer for oil products prepared in the above examples and comparative examples was evaluated and compared with commercially available drag reducers at an additive level of 20ppm by reference to the standard "indoor test method for drag reduction effect of oil pipeline drag reducer SY/T6578-2009", and the results are shown in table 1:

commercially available inlet drag reducers: beijing Jin Dingke (agency), crude oil drag reducer brand SIL643

Commercially available drag reducing agents: jiangyin Hua Heng auxiliary agent Co., ltd, crude oil drag reducer brand HH-33

The standard for evaluating the stability at normal temperature is that the stability is not layered and is not agglomerated.

Table 1 drag reducing effect and stability of drag reducing agent

The drag reducer products produced by examples 1-7 above were tested for the following characteristics:

1. the flash point is more than or equal to 50 ℃;

2. placing for 3 months at normal temperature, the drag reducer product is not layered and is not agglomerated;

3. the drag reducer product has good fluidity without obvious reduction after being placed for 1 to 2 days at the temperature of-45 ℃; has no strong pungent smell.

As described above, although the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limiting the invention itself. Various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A silicone oil-containing drag reducer comprising: 15-35 wt% of poly alpha-olefin, 1-10 wt% of silicone oil, 2-16 wt% of anti-blocking agent, 44-65 wt% of alcohol ether dispersant and 3-20 wt% of density regulator; the mass sum of the poly alpha-olefin, the silicone oil, the anti-blocking agent, the alcohol ether dispersant and the density regulator is 100 percent.

2. The oil drag reducer of claim 1, wherein the polyalphaolefin has a molecular weight of 600 to 1000 tens of thousands.

3. The oil drag reducer of claim 1, wherein the silicone oil has a viscosity of 5 to 200cst at 25 ℃.

4. The oil drag reducer of claim 3 wherein said silicone oil is selected from one of phenyl methyl silicone oil or dimethyl silicone oil.

5. The oil drag reducer of claim 1, wherein the anti-blocking agent is selected from one or more of sodium dodecylbenzene sulfonate, calcium stearate, zinc stearate, magnesium stearate, aluminum stearate, talc, ethylene bis stearamide, or polyamide wax.

6. The oil drag reducer of claim 1, wherein the alcohol ether dispersant is selected from one or more of isobutanol, n-pentanol, t-pentanol, n-hexanol, n-octanol, isooctanol, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol dimethyl ether, or diethylene glycol monobutyl ether.

7. The oil drag reducer of claim 6, wherein the mass ratio of alcohol to ether in the alcohol ether dispersant is 40-55: 1 to 8.

8. The oil drag reducer of claim 1, wherein the density modifier is selected from one or more of glycerol, diglycerol, triglycerol, N-dimethylformamide, and dioxane.

9. The method of producing an oil drag reducer according to any one of claims 1-8, comprising the steps of:

(1) After the polymerization reaction is completed, utilizing a centrifugal solid-liquid separator to carry out solid-liquid separation, filtering polyolefin suspended in silicone oil,

(2) Mixing the filter cake, namely poly alpha-olefin, with an anti-blocking agent, and fully mixing the two by utilizing a pushing three-blade stirring and dispersing device; sequentially adding a metered alcohol ether dispersing agent and a density regulator into the mixture, and carrying out uniform dispersion for 1.5 hours by a high-speed shearing machine at the temperature of 0-10 ℃ to obtain uniform and stable white slurry, namely the drag reducer.

10. The method of claim 9, wherein the amount of residual silicone oil in the polyalphaolefin is 3 to 21% of the total weight of the polyalphaolefin.