Method for purifying benzoyl chloride reaction terminating solution

A technology of benzoyl chloride and purification method, applied in the field of organic chemical adsorption and separation, can solve the problems of low yield, large energy consumption, inconvenient operation and the like, and achieve the effects of high yield and quality and simple operation process

Inactive Publication Date: 2012-07-11
JIANGSU YUANYANG PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method energy consumption is big, and yield is low, and operation is inconvenient, at the same time because there is catalyst iron trichloride in the reaction end liquid, cause benzoyl chloride to be difficult to be evaporated completely to later stage, and easily become yellow, cause product The quality is reduced, and a large amount of industrial waste (benzoyl chloride residue) is produced. This waste is very polluting to the environment and is not easy to be treated. It also contains a large amount of ferric chloride and a small amount of benzoic acid that has not been recycled.
cause waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0020] First fill 3kg of spherical activated carbon with a pore size of 100um into a titanium alloy filter with a filter bag with a pore size of 4.5um, and then pump 100kg of benzoyl chloride reaction end liquid cooled to 50°C into the columnar activated carbon In the filter of the titanium alloy that has the filter bag that aperture is 4.5um, after filtering, the finished product benzoyl chloride is obtained, and the content is 99.5%. Afterwards, the columnar activated carbon was regenerated, and the ferric chloride solution and solid benzoic acid were collected.

Embodiment 3

[0022] First fill 2kg of column-shaped activated carbon with a pore size of 10um into a titanium alloy filter with a filter bag with a pore size of 5.0um, and then pump 100kg of benzoyl chloride reaction end liquid cooled to 30°C into the column-shaped activated carbon In the titanium alloy filter with the filter bag of 5.0um in the activated carbon, after filtering, the finished product benzoyl chloride is obtained, and the content is 99.7%. Afterwards, the columnar activated carbon was regenerated, and the ferric chloride solution and solid benzoic acid were collected.

Embodiment 4

[0024] First fill 2kg of spherical activated carbon with a pore size of 50um into a titanium alloy filter with a filter bag with a pore size of 5.0um, and then pump 100kg of benzoyl chloride reaction end liquid cooled to 30°C into the columnar activated carbon In the filter of the titanium alloy that has the filter bag that aperture is 5.0um, after filtering, obtain the finished product benzoyl chloride, content is 99.9%. Afterwards, the columnar activated carbon was regenerated, and the ferric chloride solution and solid benzoic acid were collected.

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Abstract

The invention discloses a method for purifying a benzoyl chloride reaction terminating solution. The method comprises the following steps of: reacting benzotrichloride serving as a main raw material with benzoic acid or water in the presence of a ferric trichloride catalyst to prepare a benzoyl chloride reaction terminating solution, performing precision filtration through active carbon in a metal filter at a certain temperature to obtain a benzoyl chloride finished product, regenerating the active carbon, and collecting a ferric trichloride solution and a benzoic acid solid for recycling. The method is simple in operation process, 'three wastes' are nearly not produced in the whole production process, the yield and the quality of the product are high, and the method is an ideal green environment-friendly process.

Description

technical field [0001] The invention relates to a production process of benzoyl chloride, in particular to a method for purifying a reaction-finished liquid of benzoyl chloride, which belongs to the technical field of organic chemical adsorption and separation. Background technique [0002] Benzoyl chloride, the molecular formula is C 7 h 5 ClO, the molecular weight is 140.57, the Chinese name is benzoyl chloride, benzoyl chloride, benzoyl chloride, a colorless transparent flammable liquid, and it will fume when exposed to the air. Has a special pungent odor. Vapor is tear-jerking. Freezing point -1.0°C, melting point -1.0°C, boiling point 197.2°C, 71°C (1.2kPa), relative density 1.2120 (20 / 4°C), refractive index 1.5537, flash point 88°C. Soluble in ether, chloroform, benzene and carbon disulfide. When meeting with water, ammonia or ethanol, it gradually decomposes to generate benzoic acid, benzamide or ethyl benzoate and hydrogen chloride. [0003] Benzoyl chloride is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C63/10C07C51/64
Inventor 司双喜任举王建峰王敏文温建华
Owner JIANGSU YUANYANG PHARMA
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