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Preparation method for viscosity index improver

A viscosity index and improver technology, which is applied in the field of preparation of viscosity index improvers, can solve problems such as unsatisfactory and difficult to control product quality, and achieve the effects of mild conditions, environmental friendliness, and simple process operation

Active Publication Date: 2014-09-10
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic additive factories mainly use the degradation process to produce various OCP viscosity index improvers. The related process is relatively mature, but the product quality is not easy to control. The shear index (SSI) between diesel nozzles is above 20, and it is mostly used for , Low-grade internal combustion engine oil products
Can not meet the growing domestic demand for high-grade internal combustion engine oil

Method used

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  • Preparation method for viscosity index improver
  • Preparation method for viscosity index improver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 86g of base oil into a 200ml glass container equipped with a stirrer, thermometer, heating mantle and air pipe, start stirring, then add 0.05g of octadecylamine, raise the temperature to 30°C, and then add 14g of ethylene propylene cut into small pieces glue. Open the gas valve, pass nitrogen protection to the reactor, continue to heat up to 120°C, react for 4 hours, close the gas valve, add 0.5g of 30% hydrogen peroxide, open the gas valve, and keep the temperature to continue the reaction for 60 minutes. After the reaction is over, stop ventilation, cool down and discharge. The product is analyzed and tested according to the petrochemical SH / T0622-2007 standard, and the product meets the T615 quality index. Its thickening capacity is 6.5mm 2 ·s -1 , Diesel nozzle shear stability index SSI (100 ℃) is 17.1.

Embodiment 2

[0024] Add 127g of base oil into a 250ml glass container equipped with a stirrer, thermometer, heating mantle and air pipe, start stirring, then add 1g of octadecylamine, raise the temperature to 40°C, and then add 22g of ethylene-propylene rubber cut into small pieces . Open the gas valve, pass nitrogen protection to the reactor, continue to heat up to 110°C, react for 5 hours, close the gas valve, add 2g of 30% hydrogen peroxide, open the gas valve, keep the temperature and continue the reaction for 30 minutes. After the reaction is over, stop ventilation, cool down and discharge. After the reaction is over, stop ventilation, cool down and discharge. The product is analyzed and tested according to the petrochemical SH / T0622-2007 standard, and the product meets the T615 quality index. Its thickening capacity is 7.7mm 2 ·s -1 , Diesel nozzle shear stability index SSI (100 ℃) is 18.4.

Embodiment 3

[0026] Add 680g of base oil into a 1000ml glass container equipped with a stirrer, thermometer, heating mantle and air pipe, start stirring, then add 20g of octadecylamine, raise the temperature to 40°C, and then add 120g of ethylene-propylene rubber cut into small pieces . Open the gas valve, pass nitrogen protection to the reactor, continue to heat up to 110°C, react for 4 hours, close the gas valve, add 20g of 30% hydrogen peroxide, open the gas valve, and keep the temperature to continue the reaction for 40 minutes. After the reaction is over, stop ventilation, cool down and discharge. The product is analyzed and tested according to the petrochemical SH / T0622-2007 standard, and the product meets the T615 quality index. Its thickening capacity is 8.2mm 2 ·s -1 , Diesel nozzle shear stability index SSI (100 ℃) is 18.9.

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Abstract

The invention discloses a preparation method for a viscosity index improver used for lubricating oil. The method mainly conducts exploratory research on the production technology of an ethylene-propylene copolymer viscosity index improver. Under low temperature, the method utilizes a peroxide oxidation degradation process, effectively controls the product quality, fully optimizes the anti-shearing performance and thickening performance of the product, and effectively improves the product cost performance. For the product, the mass content of the ethylene-propylene copolymer is 10-20%, the mass content of an accelerator is 0.01-8%, and the balance is base oil. The product has a thickening ability of 6.0-9.0mm<2>.s<-1>, and the diesel injection nozzle shear stability index SSI (100DEG C) is 16-20. Being in accord with the T615 product quality indexes of the national petrochemical industry standard SH / T0622-2007, the product is applicable to high range internal combustion engine oil products. The process involved in the invention has the characteristics of simple operation, mild condition, and environmental friendliness.

Description

(1) Technical field [0001] The invention relates to a preparation method of a viscosity index improver. The viscosity index improver obtained by the invention is suitable for preparing high-grade internal combustion engine oil products. (2) Background technology [0002] The development of the automobile industry has put forward higher and higher requirements for automotive lubricants. In order to meet the harsh operating conditions such as high speed, high load, and low temperature, higher and higher requirements are put forward for basic research on the performance of various additives added to lubricating oil, additive evaluation methods, and the performance of additive products. With the continuous updating of engines and the requirement of saving resources, internal combustion engine oils are rapidly developing towards high-grade and multi-grade oils. In the development of multi-grade oil, in order to meet the high and low temperature performance of the oil, it is nec...

Claims

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Application Information

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IPC IPC(8): C08F210/16C08F8/50
Inventor 管飞姚文钊瞿庆范
Owner PETROCHINA CO LTD
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