Production method of 3-methyl-4-nitrobenzoate trichloronitrile butyl ester

A technology of trichloronitrile butyl nitrobenzoate and nitrobenzoic acid is applied in the preparation of carboxylic acid nitrile, chemical instruments and methods, preparation of organic compounds, etc., and can solve difficult separation, low product purity, and many impurities. and other problems to achieve the effect of reducing production cost and improving reaction yield
CN110105239AActive Publication Date: 2019-08-09山东华科化工有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
山东华科化工有限公司
Publication Date
2019-08-09

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Abstract

The invention belongs to the technical field of fine chemistry, and relates to a production method of 3-methyl-4-nitrobenzoate trichloronitrile butyl ester. The production method comprises following steps: (1), cuprous chloride is taken as a catalyst, trichloroacetaldehyde and acrylonitrile are reacted at 65 to 95 DEG C to prepare 2, 4, 4-trichloro-4-formaldehyde butyronitrile; (2), formaldehyde,calcium hydrate, and 2, 4, 4-trichloro-4-formaldehyde butyronitrile are reacted at 30 to 70 DEG C so as to prepare 2, 4, 4-trichlorocyanbutanol; (3), 3-methyl-4 nitrobenzoic acid, pyridine, and thionyl chloride are reacted at 30 to 120 DEG C to prepare 3-methyl-4-nitro benzoyl chloride; and (4), 2, 4, 4-trichlorocyanbutanol and 3-methyl-4-nitro benzoyl chloride are reacted at 30 to 50 DEG C so asto obtain a finished product. The production method is capable of increasing the entire reaction yield, and reducing production cost; and is suitable for industrialized production.
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Description

technical field

[0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a production method of 3-methyl-4-nitrobenzoic acid trichloronitrile butyl. Background technique

[0002] 3-Methyl-4-nitrobenzoic acid trichloronitrile butyl ester is an important chemical intermediate, mainly used in the production of pharmaceuticals, pesticides, and intermediates in the production of dyes and photosensitive materials. At present, the production process of 3-methyl-4-nitrobenzoic acid trichloronitrile butyl ester can be divided into four units: condensation unit 2,4,4-trichloro-4-formaldehyde solution butyronitrile preparation process , the preparation process of the reduction unit 2,4,4-trichlorocyanobutanol, the preparation process of the acylation unit 3-methyl-4 nitrobenzoyl chloride, the esterification unit product 3-methyl-4 nitrobenzene Preparation procedure of trichlorocyanobutyl formate.

[0003] At present, the preparation process ...

Claims

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