1141-38-4Relevant articles and documents
Preparation of 2,6-naphthalic acid by liquid phase oxidation of 2,6-diisopropyl naphthalene
Peng, Ge
, p. 735 - 738 (2013)
An orthogonal experiment was carried out and the effects of bromine, metal ions additives and organic nitrogen compounds on the yield of 2,6-naphthalic acid were discussed. The results shown that influence order for the yield of 2,6-naphthalic acid in the
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Haworth,Letsky,Mavin
, p. 1784,1791 (1932)
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Preparation method of dimethyl 2, 6-naphthalate
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, (2021/06/02)
The invention discloses a preparation method of dimethyl 2, 6-naphthalate. Specifically, the preparation method of the dimethyl 2, 6-naphthalate disclosed by the invention comprises the following steps: carrying out esterification reaction on 2, 6-naphthalic acid and methanol under a pressurization condition in the presence of a catalyst, and filtering without further purification to obtain the dimethyl 2, 6-naphthalate, wherein the mass ratio of the methanol to the 2, 6-naphthalic acid is (3: 1)-(25: 1), the reaction temperature ranges from 100 DEG C to 150 DEG C. According to the preparation method disclosed by the invention, the operation is simplified, the yield of the dimethyl 2, 6-naphthalate is improved, and meanwhile, the purity of the dimethyl 2, 6-naphthalate is maintained.
Method for preparing aromatic carboxylic acid compound
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Paragraph 0141-0143; 0156-0158; 0177, (2020/02/14)
The invention discloses a method for preparing an aromatic carboxylic acid compound. The method comprises the following steps: 1) heating carbon dioxide and hydrosilane in the presence of a copper catalyst in a reaction medium A; and 2) adding a reaction medium B, aryl halide, a palladium catalyst and a base to the reaction mixture in the step 1), sealing the reaction system, and performing a heating reaction. The method has the advantages that raw materials are simple and easy to obtain, the raw materials are cheap and stable, the catalyst is common, easy to obtain and stable, the reaction conditionsaremild, the aftertreatment is simple, the yield is high, and the like.
Method for preparing high-purity naphthalic acid by taking naphthalene as raw material
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Paragraph 0038-0043, (2019/09/05)
The invention discloses a method for preparing high-purity naphthalic acid by taking naphthalene as a raw material. The method comprises the following steps of 1) an alkylation reaction, wherein naphthalene, 1-isopropylnaphthalene and a catalyst are added into a reaction kettle, propylene is introduced for heating for a reaction, and diisopropylnaphthalene is obtained; 2) rectification/crystallization separation, wherein crude 2,6-diisopropylnaphthalene is obtained through rectification, and then high-purity 2,6-diisopropylnaphthalene is obtained through a crystallization method; 3) an oxidation reaction, wherein one or a mixture of a Co-Mn-Br catalyst, glacial acetic acid and propionic acid serves as a solvent, oxygen-containing gas is used for oxidizing diisopropylnaphthalene, and 2,6-naphthalic acid is obtained through liquid-phase synthesis; 4) purification, wherein an object obtained in step 3 is subjected to solid-liquid separation, washing and drying, and 2,6-naphthalic acid solid powder is obtained.