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A kind of hydrogenation method of ternary nitrile latex

A technology of ternary nitrile and nitrile rubber, which is applied in the field of hydrogenation of ternary nitrile latex, can solve the problems of the degree of hydrogenation of hydrogenation products to be improved, the reactivity of hydrogenation catalysts, and the high gel content of products. Effects of shortened reaction time, short reaction time, and easy operation

Active Publication Date: 2018-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the higher production cost in the ternary nitrile latex hydrogenation process of existing method, be difficult for implementing (reaction temperature is high, energy consumption is high), hydrogenation catalyst reactivity is lower, the hydrogenation of hydrogenation product The hydrogen degree needs to be improved, and the product gel content is relatively high, and it provides a low production cost, easier implementation (lower reaction temperature, simple operation, low energy consumption), high hydrogenation reaction activity of the hydrogenation catalyst, hydrogenation The hydrogenation method of the ternary nitrile latex whose hydrogenation degree of the product is significantly improved and the hydrogenation product has no obvious gel growth

Method used

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  • A kind of hydrogenation method of ternary nitrile latex
  • A kind of hydrogenation method of ternary nitrile latex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0041] The following examples will further illustrate the present invention, but do not limit the present invention thereby.

[0042] In the following examples and comparative examples, the method for determining the degree of hydrogenation is the bromine-iodide method (for details, refer to the bromine-iodide method for determining the degree of hydrogenation of hydrogenated nitrile rubber. Journal of Beijing University of Chemical Technology, 2002, 29(3), 46-48).

[0043] In the following examples and comparative examples, the molecular weight and molecular weight distribution are measured by a gel permeation chromatograph of HLC-8320 commercially available from TOSOH, with THF as the mobile phase and narrow distribution polystyrene as the standard sample at a temperature of 40°C.

[0044] Determination method of gel content: Weigh w1 gram of dry glue, add chlorobenzene to make a solution of 1g / 100mL, after dissolving for 24 hours, pour the solution into a filter screen with...

preparation example 1

[0048] This preparation example is used to illustrate hydrogenation catalyst M 1 a m 2 b x m L n The preparation method of (C2), wherein, M 1 for rhodium, M 2 is ruthenium, X is chlorine, L is triphenylphosphine, a:b:m:n is 2:1:4:9.

[0049] 4.5 g PPh 3 Dissolve in hot ethanol solution at 70°C under the protection of argon, and add the dissolved solution into the reaction flask; weigh 0.5 g of RhCl 3 .H 2 O and 0.23 g RuCl 3 .H 2 O was dissolved in ethanol solution under the protection of argon, heated to reflux at 78°C, and RhCl 3 .H 2 O and RuCl 3 .H 2 The ethanol solution of O was added dropwise into the reaction flask to react for 2.5 hours, cooled to 25°C, filtered with suction, washed with ether to obtain a powdered hydrogenation catalyst with Rh:Ru=2:1, denoted as C2.

preparation example 2

[0051] This preparation example is used to illustrate hydrogenation catalyst M 1 a m 2 b x m L n The preparation method of (C3), wherein, M 1 for rhodium, M 2 is ruthenium, X is chlorine, L is triphenylphosphine, a:b:m:n is 3:1:5:12.

[0052] 6 g PPh 3 Dissolve in hot ethanol solution at 70°C under the protection of argon, and add the dissolved solution into the reaction flask; weigh 0.75 g of RhCl 3 .H 2 O and 0.23 g RuCl 3 .H 2 O was dissolved in ethanol solution under the protection of argon, heated to reflux at 78°C, and RhCl 3 .H 2 O and RuCl 3 .H 2 The ethanol solution of O was added dropwise into the reaction flask to react for 2.5 hours, cooled to 25°C, filtered with suction, and washed with ether to obtain a powdered hydrogenation catalyst with Rh:Ru=3:1, denoted as C3.

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Abstract

The invention relates to the field of ternary butyronitrile latex hydrogenation and discloses a hydrogenation method of ternary butyronitrile latex. The method includes the steps of firstly, mixing the ternary butyronitrile latex, a hydrogenation catalyst and a ligand; secondly, sequentially performing first hydrogenation reaction and second hydrogenation reaction on the mixture obtained in the first step in the presence of hydrogen, wherein the reaction temperature of the first hydrogenation reaction is 0-30 DEG C, and the reaction temperature of the second hydrogenation reaction is 50-180 DEG C; thirdly, removing solvent in the reaction product obtained in the second step. By using the hydrogenation method to hydrogenate the ternary butyronitrile latex, the hydrogenation reaction activity of the hydrogenation catalyst and the hydrogenation degree of the hydrogenated product can be increased, and the hydrogenated product has no evident gel increasing as compared with nitrile-butadiene rubber in the ternary butyronitrile latex before the hydrogenation. In addition, the hydrogenation method is simple to operate, short in reaction time, easy to implement and low in hydrogenation cost.

Description

technical field [0001] The invention relates to the field of hydrogenation of ternary nitrile latex, in particular to a hydrogenation method of ternary nitrile latex. Background technique [0002] In recent years, with the continuous development of automobile manufacturing, mechanical processing, metallurgical sealing, engineering construction, petroleum industry and other industries, the demand for high-end polymers is also rising. Ternary nitrile rubber not only has the inherent oil resistance, abrasion resistance, aging resistance and air tightness of binary nitrile rubber, but also has excellent mechanical stability and freeze-thaw stability, and has a wider range of applications. [0003] In recent years, hydrogenated nitrile rubber products developed on the basis of nitrile rubber not only have good properties of binary nitrile rubber and ternary nitrile rubber such as wear resistance, low temperature resistance, oxidation resistance and ozone resistance, but more impo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08C19/02
CPCC08C19/02
Inventor 毕海鹏徐林关敏邵明波佟辉
Owner CHINA PETROLEUM & CHEM CORP
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