1, 4-butanediol production system and process

Abstract

The invention relates to the technical field of 1, 4-butanediol production, in particular to a 1, 4-butanediol production system and a 1, 4-butanediol production process, the system comprises a reactor, a distributor, a uniform collector and a circulating pipeline, the distributor and the uniform collector are arranged in the reactor, and the process is as follows: hydrogen and liquid containing 1, 4-butynediol respectively enter the distributor in the reactor; uniformly distributed fluids pass through a nickel catalyst bed layer and react in the passing process, the reacted fluids are centrifuged by a centrifugal baffle, enter a pipe fitting in a uniform collector, are filtered by filter screens on the top and the side wall of the pipe fitting, are collected and led out to an external circulating pipeline, and are pumped out by an external circulating pump; one path enters a liquid phase inlet for circular reaction, and the other path is output to a subsequent distillation refining section to obtain the required product 1, 4-butanediol. According to the invention, the bottleneck that the production cannot be continued or the effect is poor due to non-uniform reaction and bias flow under the condition that gas-liquid phases are mixed in various gas-liquid proportions in a high-pressure system is overcome.

Description

technical field [0001] The invention relates to the technical field of 1,4-butanediol production, in particular to a 1,4-butanediol production system and process. In the reactor, 1,4-butanediol is formed by reacting with hydrogen under the condition of nickel catalyst through segmented, multi-distribution, and circulating through the homogeneous collector to achieve the purpose of discharging. Background technique [0002] 1,4-Butanediol (BDO) is a colorless oily liquid, miscible with water, soluble in methanol, ethanol, acetone, and slightly soluble in ether. More than half of 1,4-butanediol (BDO) in the United States and Western Europe is used in the production of tetrahydrofuran, followed by gamma-butyrolactone and polybutylene terephthalate (polybutylene terephthalate). Esters are rapidly developing engineering plastics). 1,4-Butanediol is used as chain extender and polyester raw material for the production of polyurethane elastomers and flexible polyurethane foams; 1,...

AI Technical Summary

Problems solved by technology

The reaction pressure involved in high-pressure hydrogenation is high, the reaction operation under the fixed-bed catalyst is difficult, the effect is poor, the catalyst life is short, and the inspection and maintenance are difficult. Therefore, the reaction of high-pressure hydrogenation has always been the bottleneck in the production of various processes. Urgent need to solve

After the fixed-bed catalyst is loaded under high pressure until the end of the catalyst life, adjustments cannot be made, which further affects the long-term operation of high-pressure hydrogenation synthesis of organic compounds

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