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Preparation method of turbidity reducing agent

A technology of turbidity reducing agent and catalyst, which is used in petroleum industry, lubricating composition, etc.

Inactive Publication Date: 2015-04-08
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the cloud point of base oil with high cloud point is too high, the present invention provides a preparation method of a turbidity reducing agent capable of reducing the cloud point

Method used

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Embodiment 1

[0015] A kind of preparation method of novel turbidity reducer, with the fatty alcohol 210g of C12-14, the fatty alcohol 255g of C14-18 is mixed with 90g methacrylic acid respectively, each reaction adds inhibitor hydroquinone 1.7g, and catalyst is to 4g of toluenesulfonic acid, after all the reactants melted, under the protection of nitrogen, the temperature was raised to 120°C for 5 hours to react, and the crude product of higher alcohol methacrylate was produced. After neutralizing the obtained crude product with aqueous sodium hydroxide solution to pH = 7, the organic layer was separated, washed with water, and dehydrated to obtain higher alcohol methacrylate. Mix the prepared C12-C14, C14-C18 two high-carbon alcohol esters of methacrylate according to the mass ratio of 1:3, under the protection of nitrogen, add acid anhydride, ester or styrene, the initiator azoisobutylene Nitrile was reacted at 120°C for 7 hours to obtain its polymer. Wherein, the mass ratio of higher a...

Embodiment 2

[0018] (1), the molar ratio is 1:1.01 C12-14, the linear fatty alcohol of C14-18 is mixed with methacrylic acid respectively, add inhibitor hydroquinone, catalyst p-toluenesulfonic acid, in nitrogen Under protection, the reaction temperature is 100 ° C for 8 hours, and the reaction generates a crude product of higher alcohol methacrylate; its mass ratio is fatty alcohol: polymerization inhibitor: catalyst = 90:1:1;

[0019] (2), the high-carbon alcohol crude product of methacrylic acid obtained in step (1), adding sodium hydroxide solution to neutralize to pH=7, stirring, making its redundant methacrylic acid completely neutralized, and separating the organic layer; Higher alcohol methacrylate;

[0020] (3), mix C12-C14, C14-C18 two kinds of straight-chain higher alcohol methacrylates according to the mass ratio of 1:1, under the protection of nitrogen, add maleic anhydride, initiator azoisobutylene Nitrile was reacted at 80°C for 8 hours to obtain a polymer, namely: the targ...

Embodiment 3

[0023] (1), the molar ratio is 1:1.05 C12-14, C14-18 straight-chain aliphatic alcohol is mixed with methacrylic acid respectively, add inhibitor hydroquinone, catalyst p-toluenesulfonic acid, in nitrogen Under protection, the reaction temperature is 140°C for 2 hours, and the crude product of higher alcohol methacrylate is generated in the reaction; the mass ratio is fatty alcohol:inhibitor:catalyst=95:1.5:1;

[0024] (2), the high-carbon alcohol crude product of methacrylic acid obtained in step (1), adding sodium hydroxide solution to neutralize to pH=7, stirring, making its redundant methacrylic acid completely neutralized, and separating the organic layer; Higher alcohol methacrylate;

[0025] (3), C12-C14, C14-C18 two kinds of linear high-carbon alcohol esters are mixed according to the mass ratio of 1:6, under the protection of nitrogen, add vinyl acetate, initiator azoisobisbutyronitrile, in React at 130°C for 6 hours to obtain a polymer, namely: the target product; wh...

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Abstract

The invention relates to a preparation method of a turbidity reducing agent. The method comprises the steps: respectively mixing straight chain fatty alcohol of C12-14 and C14-18 with methacrylic acid; adding a polymerization inhibitor hydroquinol and a catalyst p-methylbenzene sulfonic acid and performing reaction under a nitrogen protection to produce a crude product of methacrylic acid higher alcohols ester; adding the crude product of methacrylic acid higher alcohols ester into an alkali liquid for neutralizing and stirring; separating an organic layer to obtain the methacrylic acid higher alcohols ester; mixing the two straight chain higher alcohols esters of C12-14 and C14-18; under the nitrogen protection, adding anhydride, ester or styrene and an initiating agent azo isobibutyronitrile for reacting to obtain a polymer, namely a target product. According to a solvent-free synthesizing method, solvent oil is eliminated, so that the cost is reduced, and the pollution is avoided.

Description

technical field [0001] The invention belongs to the field of lubricating oil additives, and in particular relates to a preparation method of a turbidity reducer, which has the effect of lowering the freezing point. Background technique [0002] "Development of nitrogen-containing polyester type diesel oil turbidity reducer", "Petroleum Refining and Chemical Industry", 1999, Volume 30, Issue 3. It is reported that a new type of diesel turbidity reducer synthesized in the laboratory by using α-olefin, acrylate and maleic anhydride as raw materials can reduce the cloud point, cold filter point and freezing point of diesel. This document reports a preparation method of a turbidity reducing agent, which is only aimed at reducing the turbidity of diesel oil, and does not involve the reduction of the cloud point of lubricating oil. [0003] In 2013, the inventor applied for a preparation method of a pour point depressant with dual functions of pour point depressant and turbidity, ...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F222/06C08F218/08C08F212/08C10M145/14C10N30/02
Inventor 孙然
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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