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Technology for heat-insulated polymerization producing rare earth polybutadiene rubber

A rare earth butadiene and adiabatic polymerization technology, which is applied in the field of adiabatic polymerization of rare earth butadiene rubber, to reduce production costs and energy consumption

Inactive Publication Date: 2004-11-10
锦州石化股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, only solution polymerization technology is used in the production of rare earth butadiene rubber, and how to reduce energy consumption and production cost under solution polymerization conditions has not been reported yet.

Method used

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  • Technology for heat-insulated polymerization producing rare earth polybutadiene rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The polymerization device adopts a 15,000-ton continuous polymerization device, and the volume of the polymerization tank is 12m 3 , is a three-pot continuous polymerization device, and is equipped with a termination tank and a post-processing device. Butadiene feed rate is 4.0m 3 / h, the feeding amount of solvent hexane is 17.0m 3 / h. After the butadiene and hexane are mixed, the temperature is lowered to 10°C by a pre-cooler, and they enter the first kettle at the same time as the rare earth catalyst.

[0021] The feed amount of rare earth catalyst is:

[0022] Neodymium naphthenate: 0.13mol / L hexane solution, 12L / h;

[0023] Diisobutylaluminum hydride (AlH(i-Bu) 2 ): 0.42mol / L% hexane solution, 70L / h;

[0024] Diisobutylaluminum chloride (Al(i-Bu) 2 Cl): 0.6mol / L hexane solution, 6L / h.

[0025] The three components of the catalyst are mixed by a static mixer and enter the first kettle after passing through the pipeline for about 10 minutes.

[0026] After co...

Embodiment 2

[0030] Neodymium neodecanoate instead of neodymium naphthenate, with Me 3 SiCl instead of diisobutylaluminum chloride, Me 3 The SiCl feed rate is: 6 L / h of 0.2 mol / L hexane solution, while butadiene and hexane are heated to 40° C. by a preheater, and other conditions are the same as in Example 1.

[0031] After continuous polymerization for 10 hours, the temperature of the first tank was 92°C, and the stirring current was 30A; the temperature of the middle tank was 104°C, and the stirring current was 34A; the temperature of the final tank was 110°C, and the stirring current was 50A.

[0032] After testing, the Mooney of the gained rare earth butadiene rubber product is 36-44 (ML 1+4 100℃ ), all indicators of the product are qualified. The cost of energy consumption is 750 yuan / ton.

Embodiment 3

[0034] Take MeSiCl 3 instead of me 3 SiCl, butadiene and hexane are fed directly at normal temperature 20° C. without preheater or precooler, and other conditions are the same as in Example 1.

[0035] After continuous polymerization for 10 hours, the temperature of the first tank was 82°C, and the stirring current was 34A; the temperature of the middle tank was 93°C, and the stirring current was 37A; the temperature of the final tank was 97°C, and the stirring current was 50A.

[0036] After testing, the mooney of the gained rare earth butadiene rubber product is 36-47 (ML 1+4 100℃ ), all indicators of the product are qualified. The cost of energy consumption is 670 yuan / ton.

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Abstract

The invention relates to a rare earth polybutadiene rubber thermal insulation polymerization manufacturing process, wherein the rare earth catalytic system comprises neodymium carboxylic compound with branching structure of carbon atoms, aluminoxane compound and halogen-containing compound. The rare earth polybutadiene rubber product is prepared by regulating monomer butadiene and solvent to 0-40 deg. C through precooler and preheater into polymerization still, charging the catalysts for butadiene sym-form polymerization, charging polymerization glue solution into terminating still with charged anti-aging agent, and the continuous post-treatment procedures of condensation, drying, and packaging.

Description

technical field [0001] The invention belongs to a production technology of adiabatic polymerization of rare earth butadiene rubber. Background technique [0002] With the development of expressway construction in China, tires are developing towards radialization and high performance. The original nickel-based butadiene rubber cannot meet the requirements of high-performance tire rubber. Therefore, the large-scale production of high-performance rare earth rubber is inevitable for economic development. Require. Since 1998, Jinzhou Petrochemical Co., Ltd. has carried out the 10,000-ton industrial trial production of rare earth butadiene rubber. The overall comprehensive performance of the trial production products is better than that of traditional nickel-based butadiene rubber (Tire Industry, 2000, 22). Approved and welcomed. However, in the production of rare earth butadiene rubber, the dynamic viscosity of the polymerization system is high, the transportation is difficult,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/602C08F136/06
Inventor 李波王道立姜连升柳希春毕吉福张学全
Owner 锦州石化股份有限公司