Energy-saving and environmental-protection butyl acrylate production method

A technology of butyl acrylate and production method, which is applied in the separation/purification of carboxylate, preparation of carboxylate, chemical instruments and methods, etc. It can solve the problems of difficult polymer treatment and excessive waste water, and achieve the service life of solid alkali The effects of long life, saving steam, and reducing the probability of side reactions

Inactive Publication Date: 2015-04-22
谦信化工集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 esterificatio

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  • Energy-saving and environmental-protection butyl acrylate production method

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Example Embodiment

[0017] Example 1

[0018] Such as figure 1 As shown, the energy-saving and environmentally-friendly production method of butyl acrylate of this embodiment 1 adopts continuous feeding. The raw material acrylic acid and n-butanol are fed in at a molar ratio of 1:1, and the methyl sulfonic acid catalyst is directly added to the esterification. In the kettle, the total feed is 1800L / h. After the raw materials are heated, the esterification reaction is carried out in the esterification kettle. The temperature of the esterification kettle is 95℃~96℃, and the pressure is 32kpa~38kpa. Keep the tower kettle circulating flow around 1300L / h, and the reboiler temperature around 93°C. After the reaction, the product undergoes azeotropic distillation, and the azeotrope enters the esterification tower in binary and ternary forms for separation. The top temperature of the esterification tower is about 68°C and the pressure is about 25kpa. The top distillate of the esterification tower is conde...

Example Embodiment

[0021] Example 2

[0022] Such as figure 1 As shown, the energy-saving and environmentally-friendly production method of butyl acrylate of this embodiment 2 adopts continuous feeding, and the raw material acrylic acid and n-butanol are added at a molar ratio of 1:1.1, and the methyl sulfonic acid catalyst is directly added to the esterification In the kettle, the total feed is 2500L / h. After the raw materials are heated, the esterification reaction is carried out in the esterification kettle. The temperature of the esterification kettle is 97°C~98°C and the pressure is 32kpa~38kpa. Keep the tower kettle circulating flow rate of the esterification kettle at about 2000L / h, and the reboiler temperature at about 99°C. After the reaction, the product undergoes azeotropic distillation, and the azeotrope enters the esterification tower in binary and ternary forms for separation. The top temperature of the tower is about 69°C and the pressure is about 25kpa. The overhead distillate o...

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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...

Claims

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Application Information

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IPC IPC(8): C07C67/08C07C69/54C07C67/54
CPCC07C67/08C07C67/48C07C67/54C07C69/54
Inventor 赵楚榜于冬娥王鹏
Owner 谦信化工集团有限公司
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