Energy-saving and environmental-protection butyl acrylate production method

Abstract

The invention discloses an energy-saving and environmental-protection butyl acrylate production method. The method comprises the following steps: adding reaction raw materials comprising acrylic acid and n-butanol into an esterification kettle according to a molar ratio of 0.8-1:1, adding a catalyst accounting for 0.5-5% of the total mass of the added materials and a polymerization inhibitor accounting for 0.01-0.1% of the total mass of the added materials into the esterification kettle, carrying out a steam heating reaction in the esterification kettle to form an esterification product, allowing the esterification product to enter an esterification tower in an ester-water azeotrope form, separating, extracting from the top of the esterification tower, condensing through a condenser, and adding the obtained condensed product to a phase splitter to layer in order to an ester phase with the content of crude ester of 85-95%; returning most of a kettle liquid of the esterification kettle to the esterification kettle in order to reflux, allowing a small amount of the kettle liquid to enter a cracking system, and carrying out cracking recovery; and carrying out reboiling heating treatment on the returned most kettle liquid, and adjusting a reboiling system to guarantee the full reaction of the raw materials, effectively control the temperature of the esterification kettle and avoid side reactions. The method can effectively reduce the occurrence probability of the side reactions and the wastewater treatment difficulty, saves energy by 5-15%, and is economic and environmentally-friendly.

Description

technical field [0001] The present invention provides an energy-saving and environment-friendly production method of butyl acrylate, especially by transforming the traditional esterification process, optimizing the production route, and simultaneously improving the production of butyl acrylate in the traditional process, which has many waste water and solves the problems of polymer refractory treatment and the like. A new production method, the new production method reduces the steam consumption required for production at the same time, so as to achieve the purpose of energy saving and efficiency improvement. Background technique [0002] Butyl acrylate is an important chemical raw material used in adhesives, elastomers, synthetic fibers, construction materials, superabsorbent resins, ultraviolet / electron beam (UV / EB) curing, flocculants, additives, detergents, etc. Many fields have shown excellent application prospects, usually used in the manufacture of soft monomers for a...

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Problems solved by technology

[0004] The present invention is to overcome the defects of the prior art, and the purpose is to provide an energy-saving and environment-friendly production method of butyl acrylate. The new production method improves the traditional process by transforming the traditional esterification process and optimizing the production route. There is a lot of waste water and the problem of difficult polymer treatment is solved, and at the same time, the steam consumption required for production is reduced, so as to achieve the purpose of energy saving and efficiency improvement

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