Hydrogenation reaction system for conjugated diolefine polymer

Abstract

The invention relates to a hydrogenation reaction system of conjugated diene polymers; the system utilizes an improved recirculating reactor to carry out hydrogenation reaction of the conjugated diene polymers; in the system, hydrogen is led to form tiny bubbles which enter into a place below the fluid level of reactants to improve reaction rate under the shearing action of high-speed jet flow ofa venturi tube, and the purposes of removing reaction heat, batch and / or continuous reaction and non-homogeneous phase catalyst recovery are achieved by arranging a pump, a pipeline, a heat-exchanging device and a catalyst recovery device. The invention relates to the application of catalytic hydrogenation reaction of the conjugated diene polymers by using the recirculating reactor.

Description

Technical field [0001] The present invention relates to a hydrogenation reaction system for conjugated diene polymers. The present invention also relates to an application of a loop reactor in the hydrogenation reaction of conjugated diene polymers. Background technique [0002] At present, the industry often uses conjugated diene monomers and styrene monomers to carry out block polymerization, so that the styrene unit blocks are dispersed in the conjugated diene unit blocks to form physical crosslinks and make the material have thermal Plastic properties of rubber can be widely used in shoemaking, polymer modification, asphalt modification, waterproof coatings, liquid sealing materials, wires, cables, auto parts, medical equipment, household electrical appliances, adhesives and toys. However, because this type of polymer is rich in unsaturated double bonds in conjugated diene units, the weather resistance, heat resistance, oxidation resistance, and yellowing resistance of the pr...

AI Technical Summary

Problems solved by technology

However, the disadvantages of using a packed bed reactor are similar to those of the above-mentioned fixed bed reactor. The reactants must be diluted with a solvent, and hot spots often appear in the reactor, which is not economical; and multiple sets of heat exchangers are required to remove the calorific value generated by hydrogenation. Prevent gel from clogging tower bed

The use of bubble column reactors often requires adjustment of the size of the bubbles, which is not easy to operate. In addition, the speed of hydrogen diffusion into the polymer solution is not good, and it is often necessary to dilute the reactants or increase the height of the tower, and the hydrogen at the top of the tower must be repressurized. Recyclable, not economical to use

As for the use of a stirred tank reactor, it is more difficult for hydrogen to dissolve into the reactant solution, which forms the main factor controlling the reaction rate, resulting in a poor reaction rate. In addition, the reaction heat of the hydrogenation reaction is high, and the heat removal of the stirred tank reactor is poor. , making it difficult to control

Stirred tanks are limited to batch production; for continuous production, two to several hydrogenation reactors are usually required, making the production cost high

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