Production method for continuous synthesizing vinylmethylketone by one-step and device thereof

Abstract

The invention provides a method to synthesize vinylmethylketone continuously and the equipments thereof. The method is that: mix aqueous acetone solution and formalin according to a certain volume ratio and then add vitriol to the mixed solution; send the mixed solution to a reactor continuously with a high-pressure pump and make the reaction liquid flow out of the reactor continuously; cool, neutralize and rectify the reaction liquid to get vinylmethylketone. The acetone not used in the reaction is recycled to circulate in the reaction. The equipments include a raw material jar, a liquid feeding pump connected with the reactor through a pipeline. The reactor is provided with an empty tube or a spiral flow guiding stainless steel wire inside; a bushing is arranged at the outside of the reactor and a heat conduction oil circulation pipeline is arranged inside the bushing; the reactor is also provided with a reaction liquid output pipeline which is connected to a flash tank through a throttle; the flash tank is connected to a condenser through a pipeline and is also connected to a distiller through a pipeline. The invention has the advantages that the raw materials are easy to get; the process is simple and the production is stable and is easy to control; the equipments are of great throughputs; the yield of vinylmethylketone is high and the acetone circulation amount is small and the energy consumed is little.

Description

technical field [0001] The invention relates to the field of organic synthesis, and more specifically relates to a production method and equipment for one-step continuous synthesis of butenone. Background technique [0002] Methyl Vinyl Ketone (MVK for short), also known as butenone, is a typical α, β-unsaturated ketone, which has a strong reaction ability and is used as an alkylating agent and a polymerization monomer. It is used as an intermediate in the synthesis of steroids and vitamin A, and can also be used to prepare anionic resins, film emulsifiers, alkylating agents, poisonous gases, etc. It is considered to be an important raw material for the plastics industry, pharmaceutical industry, and fine organic synthesis industry. . [0003] Butenone has a variety of synthetic methods. Since the raw materials of acetone and formaldehyde are easy to obtain and the cost of synthesizing butenone is low, it becomes the main method for preparing butenone. [0004] There are ...

AI Technical Summary

Problems solved by technology

The production capacity of the equipment is low and the volume of the equipment is large

The previous one-step synthesis of butenone was carried out at relatively high temperature and pressure, so the requirements for the pressure resistance and leakage prevention of the production equipment were high, the investment in the equipment was large, and the safety hazards in the production process were relatively large.

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