121-17-5Relevant articles and documents
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Ekonomov,A.L. et al.
, (1977)
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Self-powered continuous nitration method and device
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Paragraph 0053-0056, (2021/07/17)
The invention belongs to the technical field of organic synthesis application, and particularly relates to a self-powered continuous nitration method and device. According to the method, a raw material (or a raw material solution) and mixed acid (or nitric acid) are added into a self-powered continuous reactor at the same time, reaction feed liquid continuously and circularly flows, is mixed and reacts in a tube pass through self-propelling force generated by stirring of an impeller, the mass and heat transfer process is completed, and the target requirement is met. According to the invention, the mass transfer and heat transfer efficiency can be improved, the heat exchange and heat transfer capabilities are improved, the reaction time is shortened, the risk degree of art is reduced, the thermal runaway risk is avoided, the reaction safety is improved, and the realization of chemical industry intrinsic safety large scale production is facilitated.
Novel nitration process of 3,5-binitro-4-chlorobenzotrifluoride
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Paragraph 0018-0019; 0022-0023, (2018/09/08)
The invention discloses a novel nitration process of 3,5-binitro-4-chlorobenzotrifluoride. The novel nitration process comprises the following steps: mixing nitrate, fuming sulfuric acid and a waste acid according to a ratio so as to obtain a mixed acid, performing a dinitration reaction with 4-chlorine-3-nitro trifluorotoluene in a reaction kettle, after the completion of a reaction, performing phase separation so as to obtain a semi-waste acid and a target compound, applying the semi-waste acid to mononitratio reaction on p-chlorobenzotrifluoride, performing phase separation so as to obtaina waste acid and a mononitratio compound, treating the waste acid in a waste acid kettle, performing a dinitration reaction on the treated waste acid, and further recycling the waste acid. Compared with the prior art, the novel nitration process is capable of reducing and eliminating pollution from sources, is an environmental-friendly chemical process and has good industrial application prospects.
Synthetic method of aryl halide taking aryl carboxylic acid as raw material
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Paragraph 0091, (2018/01/03)
A synthetic method of an aryl halide taking aryl carboxylic acid as a raw material is characterized in that a corresponding aryl halide is formed by carrying out substitution reaction on an aryl carboxylic acid compound and haloid salt MX in an organic solvent under the condition that oxygen, a silver catalyst, a copper additive and a bidentate nitrogen ligand exist, wherein M in MX represents alkali metal or alkaline earth metal, and X represents F, Cl, Br or I. Compared with a conventional aryl halide synthetic method, the synthetic method disclosed by the invention has the obvious advantages that reaction raw materials (comprising aryl carboxylic acid and MX) are cheap and easy to obtain, the using amount of a metal catalyst is small, pollution to the environment when the oxygen is used as an oxidant is the smallest, good tolerance to various functional groups on an aromatic ring is obtained, the yield is high, and the like. The synthetic method disclosed by the invention can be widely applied to synthesis in the fields of medicine, materials, natural products and the like in industry and academia.