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Technical method for synthesizing methyl acetate

A technology of methyl acetate and process method, which is applied in the field of synthesizing methyl acetate, and can solve the problems of residual liquid and waste water in the kettle polluting the environment, complicated process, and many side reactions.

Inactive Publication Date: 2013-08-28
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing methanol liquid-phase synthesis of dimethyl ether technology uses concentrated sulfuric acid as a catalyst, which has problems such as many side reactions, serious equipment corrosion, serious environmental pollution by residual liquid and waste water in the kettle, and poor operating conditions.
In addition, it needs to go through technical processes such as methanol dehydration and dimethyl ether distillation, which are complicated and require a lot of equipment.

Method used

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  • Technical method for synthesizing methyl acetate

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Embodiment Construction

[0018] The present invention is further described below in conjunction with specific embodiments.

[0019] The device comprises a bulkhead column (C1), a rectification column (C2), a compressor (1), a heat exchanger (2), an auxiliary reboiler (3), and a condenser (4). Wherein the dividing wall column (C1) and the rectifying column (C2) are divided by a complete dividing wall column, and no longer separate condenser and reboiler. The part above the bottom of the dividing wall column (C1) can be divided into three areas, including: a reaction area (I) equipped with a hydrolysis catalyst, a side line rectification area (II) and a stripping area (III).

[0020] In this device, the condenser (4) is installed at the top of the side line rectification zone (II); the compressor (1), heat exchanger (2), and auxiliary reboiler (3) are installed between the two towers for auxiliary realization Matching heat exchange of hot and cold streams.

[0021] The gas phase at the bottom of the d...

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Abstract

The invention relates to a novel technical method for synthesizing methyl acetate and equipment used in the method, and particularly relates to a novel technology combined with a differential pressure thermal coupling technology and a reaction rectifying dividing wall tower. The technical method is characterized in that methyl alcohol and acetic acid are subjected to esterification reaction in a reaction zone (I), incompletely reacted methyl alcohol is obtained in a side-line rectification zone (II), and reaction water is obtained at the bottom of the rectifying tower. According to the equipment, a dividing wall tower (C1) and a rectifying tower (C2) are not separately provided with condensers and reboilers, steam on the top of the dividing wall tower is pressurized by a compressor, and then, enters the bottom of the rectifying tower, and a liquid phase at the bottom of the rectifying tower is discharged and flows backwards into the tower from the top of the dividing wall tower. The operation pressures of the two towers are changed to ensure that the temperature of steam on the top of the rectifying tower is higher than that of the liquid phase at the bottom of the dividing wall tower, so that the heat exchange matching between two material flows in a heat exchanger (2) is realized, and the energy consumption is substantially reduced.

Description

technical field [0001] The invention relates to a process for synthesizing methyl acetate. Background technique [0002] Methyl acetate (Methyl Acetate, MA), also known as methyl acetate, is one of the most widely used fatty acid esters. With excellent solubility properties, it is widely used in the fields of coatings, inks, adhesives, pharmaceuticals and pesticide intermediates. Methyl acetate is a fast-drying solvent, which can dissolve acrylic acid, vinyl, nitrocellulose, epoxy polyester, polyurethane, phenolic resin and other resins. It has a higher flash point than acetone, and is gradually used in the world to replace Benzene and ketone solvents such as acetone, butanone, toluene, etc. With my country's increasing emphasis on environmental protection, health and safety issues, the rapid development of construction, automobiles, flavors and fragrances, and color printing industries, and the increasingly stringent requirements of foreign countries on the safety and env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/14C07C67/08B01J19/24
Inventor 刘立新刘桂丽齐新宇张镇宋慧
Owner QINGDAO TECHNOLOGICAL UNIVERSITY