92298-55-0

Usage

Structure

Tetramethyl ester derivative of cyclohexanetetracarboxylic acid

Usage

a. Monomers in the synthesis of high-performance polyimides and other engineering plastics
b. Building block in the synthesis of various pharmaceuticals and agrochemicals

Industrial applications

a. Advanced composites
b. Adhesives
c. Coatings
d. Electronic materials

Properties

a. High thermal stability
b. Excellent mechanical properties

Role

Critical in the development of advanced materials

Value

Versatile properties for a wide range of applications

Upstream product

• 15383-49-0 cyclohexane-1e,2a,4a,5e-tetracarboxylic acid 
• 635-10-9 tetramethyl 1,2,4,5-benzenetetracarboxylate 
• 89-05-4 1,2,4,5-benzenetetracarboxylic acid 
• 67-56-1 methanol 
• 1147100-49-9 cyclohexane-1r,2t,4t,5c-tetracarboxylic acid 

Downstream Products

• 2754-41-8 1,2,4,5-cyclohexanetetracarboxylic acid-1,2:4,5-dianhydride 

Relevant academic research and scientific papers

Synthesis method for 1,2,4,5-cyclohexanetetracarboxylic dianhydride

The invention provides a preparation method for 1,2,4,5-cyclohexanetetracarboxylic dianhydride. The method comprises the following steps: preparing pyromellitic acid ester by reacting pyromellitic acid with an esterification reagent; synthesizing hydrogenated pyromellitic acid ester by adding the pyromellitic acid ester with hydrogen in a fixed bed reactor; obtaining the 1,2,4,5-cyclohexanetetracarboxylic dianhydride by synthesizing the hydrogenated pyromellitic acid ester in strong acids and organic solvents. Compared with a traditional production process, the esterification reaction of the invention has high efficiency, the service life of a catalyst is prolonged, continuous production of hydrogenation reaction is realized, and a process route is shortened. The method has the advantagesof simple operation, high production efficiency and low cost and the like. The content of metal ions (sodium, potassium, iron, calcium, aluminum, and zinc) of the obtained 1,2,4,5-cyclohexanetetracarboxylic dianhydride contains is equal to or less than 1 ppm, and meets requirements of electronic grade products.