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Copolymer pour-point depressant for lubricating oil

A technology of copolymer and pour point depressant, which is applied in the field of copolymer type lubricating oil pour point depressant to achieve excellent pour point depressant effect and excellent pour point depressant effect.

Inactive Publication Date: 2013-04-03
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The commercialized pour point depressants currently used in China, such as polyvinyl acetate-fumarate (polymericfumaric ester and vinyl acetate, referred to as PFVA, and the Chinese label is T818), are formed by the copolymerization of fumaric acid ester and vinyl acetate. Although the pour point depressant has a certain pour point depressant effect, as the wax content in crude oil increases, the field of lubricating oil urgently needs a pour point depressant with more excellent pour point depressant effect

Method used

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  • Copolymer pour-point depressant for lubricating oil
  • Copolymer pour-point depressant for lubricating oil
  • Copolymer pour-point depressant for lubricating oil

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preparation example Construction

[0034] The present invention also provides the preparation method of above-mentioned triblock copolymer, and this method comprises the following steps:

[0035] (1) Add fumaric acid higher ester, vinyl acetate and styrene in the device, wherein, the molar fractions of fumaric acid higher ester, vinyl acetate and styrene are respectively 10-80%, fumaric acid higher ester, The sum of the mole fractions of vinyl acetate and styrene is 100%;

[0036] (2) adding consumption is the free radical polymerization initiator of 0.1-1% of the total mass of fumaric acid higher ester, vinyl acetate and styrene;

[0037] (3) be heated up to 70-80 ℃, react for 3-8 hours;

[0038] (4) underpressure distillation, remove excessive vinyl acetate, obtain light yellow, viscous liquid, i.e. triblock copolymer, that is, the copolymer type lubricating oil pour point depressant of single component;

[0039] The structural formula of described fumaric acid senior ester is In the formula, n is an inte...

Embodiment 1

[0071] combine figure 2 Illustrative Example 1

[0072] The preparation method of single-component copolymer type lubricating oil pour point depressant:

[0073] (1) Add 0.08mol of myristyl alcohol and 0.08mol of fumaric acid into a reactor with a stirring device, add 60% of the total mass of myristyl alcohol and fumaric acid toluene, add myristyl alcohol and fumaric acid 1.5% of the total mass of p-toluenesulfonic acid was polymerized at a temperature of 130° C. for 6 hours to obtain a higher ester of fumaric acid;

[0074] (2) Add 0.08mol fumaric acid higher ester, 0.08mol vinyl acetate, 0.08mol styrene in the reactor equipped with stirring device and temperature sensing device, add fumaric acid higher ester, vinyl acetate and 0.5% dibenzoyl peroxide of the total mass of styrene, react at 70-80°C for 6 hours, and distill under reduced pressure to remove excess vinyl acetate to obtain a copolymer-type lubricating oil pour point depressant, viscosity average molecular weigh...

Embodiment 2

[0079] The preparation method of single-component copolymer type lubricating oil pour point depressant:

[0080] (1) Add 0.08mol of myristyl alcohol and 0.08mol of fumaric acid into a reactor with a stirring device, add toluene with 60% of the total mass of myristyl alcohol and fumaric acid, add myristyl alcohol and fumaric acid The p-toluenesulfonic acid of 1.5% of the total mass of the acid was polymerized for 5.5 hours at a temperature of 120° C. to obtain a higher ester of fumaric acid;

[0081] (2) Add 0.08mol of fumaric acid higher ester, 0.08mol of vinyl acetate, 0.04mol of styrene in the reactor equipped with stirring device and temperature sensing device, add fumaric acid higher ester, vinyl acetate React with 0.5% dibenzoyl peroxide of the total mass of styrene at 70-80°C for 4 hours, and distill under reduced pressure to remove excess vinyl acetate to obtain a copolymer-type lubricating oil pour point depressant, viscosity average The molecular weight is 55000, and...

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Abstract

The invention provides a copolymer pour-point depressant for lubricating oil to further improve pour-point depression effects of conventional pour-point depressants. The copolymer pour-point depressant is a triblock copolymer or a mixture of a plurality of triblock copolymers. A structural formula of the triblock copolymer is described in the specification; in the structural formula, n is an integer in a range of 7 to 17, a, b and c are integers in a range of 1 to 1000, respectively, and viscosity-average molecular weight of the triblock copolymer is 10000 to 500000. The invention also provides a preparation method for the triblock copolymer. The pour-point depressant provided by the invention has excellent pour-point depression effects and enables a pour point to be reduced by 32 DEG C.

Description

technical field [0001] The invention relates to a copolymer type lubricating oil pour point depressant, which belongs to the technical field of lubricating oil additives. technical background [0002] Most of the crude oil produced in my country is high-wax crude oil, especially with the increasing depletion of oil resources, the wax content of newly produced crude oil is getting higher and higher. This kind of crude oil has a high freezing point and poor low-temperature fluidity. The solutions include dewaxing, hydrogenation, adding point depressants, etc. From the perspective of reducing energy consumption and production costs and increasing the economic benefits of enterprises, it is simple to add polymer point depressants with certain functions to waxy crude oil. effective method. [0003] The pour point depressant technology began in the early 1930s and was mainly used in the field of lubricating oil. In 1929, Davis obtained the earliest pour point depressant, Paraflow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F218/08C08F222/14C08F212/08C10M145/16C10N30/02
Inventor 周光远雷金化张丽王小波曹旭
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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