3010-82-0Relevant articles and documents
A PROCESS FOR THE PREPARATION OF 4-CYANOBENZOYL CHLORIDES
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Page/Page column 11-12, (2021/10/22)
The present invention relates to a process for the preparation of 4-cyanobenzoyl chlorides of formula I through reaction of compounds of formula II with a chlorinating agent.
Method for preparing terephthalamide from terephthalic acid
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Paragraph 0046-0112, (2021/06/21)
The invention discloses a method for preparing terephthalamide from terephthalic acid, which comprises the following steps: carrying out esterification reaction on terephthalic acid and alcohol, and discharging by-product water generated by the reaction out of the reaction system; introducing ammonia gas into the esterification liquid to be ammonolyzed, and carrying out ammonolysis reaction to obtain a reaction container (marked as a reaction container I) filled with ammonolysis liquid containing high-concentration ammonia gas; connecting the reaction container I with a reaction container (marked as a reaction container II) filled with a next batch of esterification liquid to be ammonolyzed, so as to recover excessive ammonia gas; and cooling the ammonolysis liquid containing the low-concentration ammonia gas in the reaction container I, conducting filtering, and washing and drying a filter cake to obtain terephthalamide. According to the invention, terephthalic acid is subjected to esterification and ammonolysis to produce terephthalamide, the main byproduct in the reaction process is water, and the green production concept is met.
Preparation method of aromatic amide compound
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Paragraph 0056-0057, (2020/07/15)
The present invention provides a preparation method of an aromatic amide compound. In an organic solvent, under the effect of a catalyst, an aromatic acid compound and an amine source are subjected toa dehydration reaction to obtain the aromatic amide compound, wherein the aromatic acid compound is an aromatic acid, a substituted aromatic acid, a heterocyclic aromatic acid or a substituted heterocyclic aromatic acid; and the substituent group of amide is any substituent group of H, a C1-C8 straight-chain alkyl or branched-chain alkyl group, a benzene ring or an aromatic ring. The aromatic amide compound is an important chemical intermediate, and the synthesis method is mild in reaction condition and high in yield.