Preparation method of methylcyclohexyl diisocyanate

Abstract

This application discloses a method for preparing methylcyclohexyl diisocyanate and a reaction kettle. The preparation reaction kettle provided by the present invention is as follows: it includes a reaction tank, and also includes a number of electromagnet components, plastic balls, blades, copper rods, and permanent magnets. ; The copper rod is fixedly arranged at the bottom of the reaction tank, and the bottom of the reaction tank is a non-ferrous tank bottom, the permanent magnet is fixedly arranged in a plastic ball, and a through hole is provided on the plastic ball, and the plastic ball passes through Its own through hole is slidingly set on the copper rod, and the blades are arranged on the outer wall of the plastic ball; a spiral groove is opened on the outer wall of the copper rod, and a sliding ball is fixedly arranged on the plastic ball, and the sliding ball is located on the outer wall of the plastic ball. In the spiral groove; the electromagnet assembly is movable or fixedly arranged outside the reaction tank, and the copper rod and the electromagnet assembly are respectively located on both sides of the bottom of the tank, and the electromagnet assembly is used to drive the plastic ball to rotate along the copper stick exercise.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for preparing methylcyclohexyl diisocyanate. Background technique [0002] Methylcyclohexyl diisocyanate is a chemical raw material. Polyurethane products prepared from it have excellent characteristics such as non-yellowing, light stability, weather resistance and high mechanical properties. Therefore, methylcyclohexyl diisocyanate is a widely used chemical raw materials. [0003] At present, the production method of methylcyclohexyl diisocyanate is to use phosgene synthesis method, but phosgene is a highly toxic gas with low boiling point and high volatility, and there is great danger in the process of use, transportation and storage, and The amount of gas used in the production of phosgene is very large, and the reaction temperature is as high as 300°C to 500°C, resulting in high energy consumption and low production efficiency. Contents of the invention ...

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Problems solved by technology

[0003] At present, the production method of methylcyclohexyl diisocyanate is to use phosgene synthesis method, but phosgene is a highly toxic gas with low boiling point and high volatility, and there is great danger in the process of use, transportation and storage, and The amount of gas used in the production of phosgene is very large, and the reaction temperature is as high as 300°C to 500°C, resulting in high energy consumption and low production efficiency.

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