Methallyl chloride synthetic process and apparatus thereof

Abstract

A process for synthesizing methallyl chloride includes such steps as gas-phase mixing of chlorine with isobutylene, separating chloride from HCl, neutralizing, continuous multi-tower vacuum distilling, and neutralizing. Its apparatus features that the cooling system is separated from reactor system. Its advantage is high product purity (more than 99.5%).

Description

(1) Technical field: [0001] The invention relates to a synthesis process and equipment for organic chlorinated substances. (2) Background technology [0002] The production of methallyl chloride (also known as methallyl chloride) is a gas-phase reaction of chlorine gas and isobutylene. Generally, the reaction temperature is normal temperature (30-100°C) and the reaction pressure is normal pressure (9 atmospheres) in a set of cooled tubular reactor. In order to avoid the deep chlorination reaction of methallyl chloride, isobutylene is slightly excessive. Feedstock was fed into the reactor through two outlet nozzles. (Japanese Laid-Open Patent Gazette, Japanese Unexamined 50-62910) The mixer reported is a single nozzle. The mixer of single spray nozzle then along with the enlargement of industrial scale, produces amplification effect and reduces yield, and generally speaking yield can drop from 85% to 75-78% or lower. [0003] The reacted m...

AI Technical Summary

Problems solved by technology

Because the crude chloride contains light components and heavy components, wherein the light components contain 4 to 5% dimethyl vinyl chloride, which has a similar boiling point and relative volatility to methallyl chloride, so it is similar to methallyl chloride. Allyl chloride is extremely difficult to separate, and the double-tower process cannot simultaneously obtain high-purity products and low losses in rectification

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