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Photochemical reaction method of benzophenone

A photochemical reaction, benzophenone technology, applied in the chemical industry, can solve problems such as explosion

Inactive Publication Date: 2016-01-06
CHONGQING CHANGFENG CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the process of the reaction, the photochemical reaction is carried out first. The existing photochemical reaction uses uniform transmission when the phosgene is introduced. However, in the process of the reaction, explosions often occur

Method used

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  • Photochemical reaction method of benzophenone

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Experimental program
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Effect test

Embodiment Construction

[0012] The photochemical reaction method of benzophenone of the present invention, the reaction parameters in each embodiment reaction process are as shown in table 1:

[0013] Table 1

[0014]

[0015] Take embodiment two as example, illustrate reaction method of the present invention:

[0016] First put 1kg of aluminum trichloride and 3kg of benzene into the reaction kettle, and in the process of stirring, now use 60m 2 The speed of / h is first passed into phosgene slowly for 3 hours, the reaction temperature is 30 ° C, and then 100 m 2 / h speed into phosgene 3h; then 30m 2 The speed of / h passes through phosgene for 2h, and the total amount of phosgene passed through is 1kg.

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Abstract

The invention discloses a photochemical reaction method of benzophenone. The method comprises the steps that aluminum trichloride and benzene are put into a reaction kettle, phosgene is fed in the stirring process, a reaction is conducted with the feeding flow velocity of the phosgene changing from low to high to low, the reaction temperature ranges from 25 DEG C to 50 DEG C, and the reaction time ranges from 8 h to 9 h; the first low velocity ranges from 50 m<2> / h to 80 m<2> / h, the high velocity ranges from 80 m<2> / h to 120 m<2> / h, and the next low velocity ranges from 20 m<2> / h to 50 m<2> / h. By means of the photochemical reaction method of the benzophenone, the technical problems of avoiding explosions is solved.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a photochemical reaction method of benzophenone. Background technique [0002] Benzophenone is a white shiny prismatic crystal. Rose-like fragrance, sweet taste, 1G is soluble in 7.5ml ethanol, 6ml ether, soluble in chloroform, insoluble in water, relative density (d504) 1.0869, melting point 48.5°C, boiling point 305.4°C, refractive index (n45.2D) 1.5975, flash Point 138 ℃, irritating. Molecular formula: C 13 h 10 O, structural formula ; Molecular weight: 182; Physical and chemical properties: Specific gravity: 1.098 (g / cm 3 ,20℃), boiling point: 306℃, insoluble in water, soluble in many organic solvents such as ethanol, benzene, chloroform, etc. Uses: Ultraviolet absorber, organic synthesis raw material and pharmaceutical intermediate, fragrance fixative. [0003] The existing synthesis routes of benzophenone include phosgene method, benzoyl chloride method, carbon diox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/47C07C49/786
CPCC07C45/47C07C49/786
Inventor 李定山
Owner CHONGQING CHANGFENG CHEM IND