Production technology of ethylene propylene rubber

Abstract

The invention discloses a production technology of ethylene propylene rubber and relates to the field of rubbers. The production technology of the ethylene propylene rubber comprises five technological processes, namely polymerization, removal of a catalyst, recycling of a monomer and a solvent, coagulation as well as dehydration and drying. According to the production technology of the ethylene propylene rubber, a catalyst (described in the specification) is adopted in the polymerization process, a reaction speed is greatly increased, a full liquid phase thermal insulation reaction is adopted in the polymerization process, namely reaction heat is used for warming a polymerization kettle in a thermal insulation manner, optimal design of the polymerization kettle can meet reactant mixing requirement, a liquid-liquid filling reaction system can accurately control parameters of the polymerization technological process and product quality, concentration of a polymer glue solution is high, quantity of a cycle solvent is low, efficiency of recycled steam and recycling rate of the solvent are high, the polymerization kettle is small in volume but high in production intensity, conversion per pass is high, raw materials and a cycle monomer do not need to be refined, content of residual catalyst in the product is low, qualified rate of a product is high, consumption of the raw materials and the catalyst is low, and content of a vanadium catalyst in sewage is low. The production technology of the ethylene propylene rubber is good, high in production elasticity and low in investment.

Description

technical field [0001] The invention relates to the field of rubber, in particular to an ethylene-propylene rubber production process. Background technique [0002] Ethylene-propylene rubber is a kind of organic compound product and an extremely important raw material in the rubber product industry. It has a variety of good physical and chemical properties. In 2003, the amount of synthetic rubber in China reached about 1.13 million tons, of which the amount of EPDM rubber was 20,400 tons, accounting for only 1.8% of the amount of synthetic rubber, so the demand for ethylene-propylene rubber is still considerable. Improving its production process and producing more and better products has become the responsibility of the company. The application number is CN200710193031.3 Disclosed is a preparation method of ethylene-propylene rubber. Using ethylene and propylene as raw materials, in the presence of a catalyst metallocene compound and a cocatalyst MAO, carry out a polymerizat...

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Problems solved by technology

[0002] Ethylene-propylene rubber is a kind of organic compound product and an extremely important raw material in the rubber product industry. It has a variety of good physical and chemical properties. In 2003, the amount of synthetic rubber in China reached about 1.13 million tons, of which the amount of EPDM rubber was 20,400 tons, accounting for only 1.8% of the amount of synthetic rubber, so the demand for ethylene-propylene rubber is still considerable. Improving its production process and producing more and better products has become the responsibility of the company. The application number is CN200710193031.3 Disclosed is a preparation method of ethylene-propylene rubber. Using ethylene and propylene as raw materials, in the presence of a catalyst metallocene compound and a cocatalyst MAO, carry out a polymerization reaction at 60-70° C. for 1-5 hours, and distill off the solvent to obtain ethylene-propylene rubber. Propylene rubber, the polymerization reaction process of this method is simple, the production cost is low, compared with the prior art, the pollution caused by the vanadium-based catalyst is reduced, which is beneficial to environmental protection, and a new process route has been developed for the production of ethylene-propylene rubber. However, this method has poor catalytic effect, low productivity, low recovery steam efficiency and low solvent reuse rate.

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