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Method for preparing aromatic polycarboxylic acid derivative

A technology of derivatives and aromatic hydrocarbons, applied in the field of chemistry, which can solve the problems of high pressure and temperature, extremely high equipment safety requirements, and poor environmental impact.

Inactive Publication Date: 2018-02-16
朱翠英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these systems have their advantages, the disadvantages are also obvious. They need to use a large amount of acetic acid as a solvent, which has a bad impact on the environment. The hydrobromic acid and a large amount of acetic acid produced by the bromide initiator are easy to cause corrosion to the reaction vessel. Containers made of nickel-based or titanium-zirconium-based alloys, the pressure and temperature are too high, and the safety requirements for equipment are extremely high

Method used

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  • Method for preparing aromatic polycarboxylic acid derivative
  • Method for preparing aromatic polycarboxylic acid derivative
  • Method for preparing aromatic polycarboxylic acid derivative

Examples

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Embodiment 1

[0081] The operation of Example 1 is as follows.

[0082] Example 1 prepares terephthalic acid from 1,4-xylene [formula (I) to (II), cobalt chloride\2-aminopyridine\dodecyl fatty acid sodium\tempo, 0.5MPa oxygen\(butanedi Acid dimethyl ester + acetic acid)\140℃\24 hours\(1.0 / 0.005 / 0.005 / 0.005 / 0.005)].

[0083] Add cobalt chloride (0.020mmol), 2-aminopyridine (0.020mmol), sodium lauryl fatty acid (0.020mmol), 2,2,6,6-tetramethylpiperidine nitrogen oxide ( Also known as Tempo, 0.020mmol), toluene (4.0mmol), dimethyl succinate 2.0mL, acetic acid 0.2mL, under 0.5MPa oxygen at 140°C, stirred for 24 hours, stopped the reaction, cooled and filtered to obtain benzoic acid, produced The rate is 95%.

[0084] In the embodiment (1) to (180), when multiple metals are used in the embodiment, the ratio between the metals is 1:1. When multiple ligands are used in the embodiment, the ratio between the ligands is 1:1. When multiple additives are used in the embodiment, the ratio between th...

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Abstract

The invention relates to a method for preparing an aromatic polycarboxylic acid derivative and specifically discloses the method for preparing the aromatic polycarboxylic acid derivative. The method comprises the step: making a polymethyl substituted aromatic derivative as shown in a formula (I) react with an oxidant in an inert solvent under the conditions that an additive A is used or not used as a co-catalyst and an additive B is used or not used as a co-catalyst and under the catalysis of a metal salt and a ligand to obtain the aromatic polycarboxylic acid derivative as shown in a formula(II); or making a 3,3',4,4'-tetramethyl diphenyl derivative as shown in a formula (III) react with an oxidant to obtain a 3,3',4,4'-tetracarboxyl diphenyl derivative as shown in a formula (IV). The invention provides the method for preparing the aromatic polycarboxylic acid derivative under the conditions of low pressure, low temperature, low energy consumption, little pollution, simple process, low equipment requirement and low cost.

Description

technical field [0001] The present invention relates to the field of chemistry, in particular to a method for preparing aromatic hydrocarbon polyformic acid derivatives, and more specifically, to a method for preparing aromatic hydrocarbon polyformic acid derivatives by catalytic oxidation of metals in a diester solvent. Background technique [0002] Aromatic polyformic acid derivatives are important chemical and pharmaceutical raw materials, especially aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, and phthalic acid, and aromatic tricarboxylic acids such as trimellitic acid and trimellitic acid Polyacid compounds such as pyromellitic acid and 3,3',4,4'-tetracarboxydiphenyl derivatives are used in the development and synthesis of polymer materials, additives, films, laminates, coatings, adhesives, insulating materials, etc. The method of arene polyformic acid derivatives is of great significance. [0003] At present, air or oxygen is used as an oxi...

Claims

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Application Information

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IPC IPC(8): C07C51/265C07C63/26C07C63/24C07C63/16C07C63/68C07C65/21C07C63/307C07C51/235C07C201/12C07C205/57C07C63/38C07C63/313C07C65/34C07C65/24C07C63/72C07C63/331C07C315/04C07C317/44
CPCC07C51/235C07C51/265C07C201/12C07C315/04C07C63/26C07C63/24C07C63/16C07C63/68C07C65/21C07C63/307C07C205/57C07C63/38C07C63/313C07C65/34C07C65/24C07C63/72C07C63/331C07C317/44
Inventor 不公告发明人
Owner 朱翠英
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