Device and method for continuously synthesizing sulfolene

Abstract

The invention relates to a device and a method for continuously synthesizing sulfolene. The process comprises the following steps: continuously putting a butadiene raw material, a polymerization inhibitor and a sulfur dioxide raw material into a reaction kettle A and a reaction kettle B according to a proportion to carry out a synthesis reaction, controlling a reaction mixture through a back pressure valve, and putting a sulfolene product into a blow-off tank after primary flash evaporation and secondary flash evaporation; introducing synthesis tail gas into a condenser and a freezing tank through a buffer tank for cryogenic recovery and then recycling. The continuous synthesis process of sulfolene, provided by the invention, has the advantages of low equipment investment, flexible processoperation, high product yield, effective recycling of raw materials, and reduced production cost. In addition, the exhaust emission is reduced and clean production is realized.

Description

technical field [0001] The invention relates to a device and method for continuously synthesizing sulfolene. Background technique [0002] Sulfolane is a chemical intermediate for the industrial synthesis of sulfolane. Sulfolane is mainly used as an extraction agent for the extraction of aromatics, a solvent for polymer spinning or film casting, purification of natural gas and synthesis gas, refinery gas, and purification of synthesis gas. Purification and desulfurization, and as a solvent for the synthesis of fine chemicals such as rubber, plastics and pharmaceuticals. In addition, it can also be used in the textile printing and dyeing industry as a printing and dyeing auxiliary agent to make the color bright and bright. With the widening of the application field, its market demand is also increasing, which accordingly promotes the progress of its production technology. At present, the relatively mature method of synthesizing sulfolene in the industry is to use butadiene ...

AI Technical Summary

Problems solved by technology

At present, the relatively mature method of synthesizing sulfolene in the industry is to use butadiene and sulfur dioxide as raw materials, and in the presence of a polymerization inhibitor, heat and react in a reactor to synthesize sulfolene. Most of the synthesis processes at home and abroad are Batch production, CN104761534A discloses a method for continuously synthesizing sulfone using a loop synthesis reactor, which has the following disadvantages: due to the generation of polymers in the process of synthesizing sulfone, long-term production will occur in the loop reactor Accumulation of wall-hanging in dead corners causes poor circulation, eventually clogging the reactor, and troublesome maintenance and treatment; Tank series not only effectively reduces the degree of back-mixing, but also can control different reaction temperatures, material concentrations and different stirring speeds in each tank to adapt to different requirements in technology

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