Device for continuously producing methyl tetrahydrophthalic anhydride

Abstract

The invention discloses a device for continuously producing methyltetrahydrophthalic anhydride, which is composed of a raw material box, a catalytic box, a water removal tank and a production box. The communication pipe between the water removal tanks is provided with a catalytic box, the water removal tank is provided with a heater, the top of the water removal tank is provided with a distillation tube, and the distillation tube is sealed and connected with the distilled water collection bucket. There is a filter, the other end of the water removal tank is sealed and connected to the production box through a communication pipe, a detector is provided on the side wall of the production box, a discharge port is provided at the bottom of the production box, and a discharge port is provided inside the production box. There is an acid-base detector and a display demodulator. Through the setting of the detector, the pH of methyltetrahydrophthalic anhydride can be measured during the raw material production process, which improves the purity detection of p-methyltetrahydrophthalic anhydride, thus avoiding the occurrence of pH Too high affects the product quality of methyl tetrahydrophthalic anhydride.

Description

technical field [0001] The invention relates to the technical field of methyltetrahydrophthalic anhydride production equipment, in particular to a device for continuous production of methyltetrahydrophthalic anhydride. Background technique [0002] Methyltetrahydrophthalic anhydride, also known as methyltetrahydrophthalic anhydride, has two isomers, namely 4-methyltetrahydrophthalic anhydride and 3-methyltetrahydrophthalic anhydride, with melting points of 65°C and 63°C, respectively. It is rarely used alone as a curing agent. The actual commodity is a liquid mixture of isomerized isomers. Molecular weight 166.17. Pale yellow transparent oily liquid, relative density 1.20~1.22. Freezing point <-20 ℃. The boiling point is 115~155°C. Viscosity (25°C) 40-80mPa·s. The refractive index is 1.4960~1.4980. Anhydride group content ≥ 40%. The neutralization equivalent is 81-85. The flash point is 137~150℃. Soluble in acetone, ethanol, toluene, etc. It has good stability ...

AI Technical Summary

Problems solved by technology

[0003] Since the traditional production device of methyl tetrahydrophthalic anhydride does not have a detector to carry out the final test on methyl tetrahydrophthalic anhydride, in the continuous production process, if there is a problem in the middle link, it is easy to cause the production of methyl tetrahydrophthalic anhydride to be impure, resulting in Inefficient and poor-quality production of methyltetrahydrophthalic anhydride

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