Continuous esterification production process of trimethyl borate

A technology of trimethyl borate and production process, applied in the field of medicine and chemical industry, can solve the problems of high requirements for equipment material selection, low primary conversion rate and high equipment cost, so as to improve reaction conversion rate and reaction yield, and reduce heat energy. The effect of reducing energy consumption and cooling energy consumption

Pending Publication Date: 2022-03-18
烟台国邦化工机械科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is not difficult to find that the primary conversion rate of the reaction raw materials in the above method is low; the operation is cumbersome; Blockage; the discharge of waste liquid pollutes the environment due to saturated boric acid
[0012] Moreover, the traditional reaction uses an acidic catalyst for the catalytic reaction, which requires high equipment material selection and high equipment cost
Acidic catalysts will cause side reactions between reactants, resulting in low reaction conversion an

Method used

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  • Continuous esterification production process of trimethyl borate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Methanol and boric acid are mixed in a molar ratio of 6:1, and enter the esterification tower after pre-reaction in the pre-reactor. 30% to 40% trimethyl borate is produced from the top of the esterification tower, and water is produced from the bottom of the esterification tower. 30%~40% trimethyl borate gaseous phase is extracted from the top of the tower and enters the refining tower, the trimethyl borate product is extracted from the top of the refining tower, the bottom of the tower is methanol, and the methanol is reused, and the specific parameters are as follows:

[0040] 1. The temperature at the top of the esterification tower is 62-64°C, and the temperature at the bottom of the tower is 100-102°C;

[0041] 2. The reflux ratio of the esterification tower is controlled at 3;

[0042] 3. The temperature at the top of the refining tower is 53-55°C, and the temperature at the bottom of the tower is 64-66°C;

[0043] 4. The reflux ratio of the refining tower is cont...

Embodiment 2

[0047] Mix methanol and boric acid in a molar ratio of 5:1, pre-react in the pre-reactor and then enter the esterification tower. 30% to 40% trimethyl borate is produced from the top of the esterification tower, and water is produced from the bottom of the esterification tower. , 30% to 40% of the trimethyl borate gas phase is extracted from the top of the tower and enters the refining tower, and the trimethyl borate product is extracted from the top of the refining tower, and the bottom of the tower is methanol, and the methanol is reused. The specific parameters are as follows:

[0048] 1. The temperature at the top of the esterification tower is 62-64°C, and the temperature at the bottom of the tower is 100-102°C;

[0049] 2. The reflux ratio of the esterification tower is controlled at 4;

[0050] 3. The temperature at the top of the refining tower is 53-55°C, and the temperature at the bottom of the tower is 64-66°C;

[0051] 4. The reflux ratio of the refining tower is ...

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Abstract

The invention relates to a trimethyl borate continuous esterification production process, which comprises the following steps: proportioning methanol and boric acid, carrying out pre-reaction in a pre-reactor, feeding into an esterification tower after pre-reaction, and continuing to carry out autocatalytic reaction; heat coupling of esterification and rectification is completed in the esterification tower, crude trimethyl borate is extracted from the tower top of the esterification tower, and water is extracted from the tower bottom of the esterification tower; a crude trimethyl borate gas phase extracted from the tower top of the esterification tower enters a refining tower, a qualified trimethyl borate product is extracted from the tower top of the refining tower, qualified recovered methanol is obtained from the tower bottom of the refining tower, and the methanol returns to a reaction system for recycling. According to the invention, no catalyst is added, and reactants are adopted for autocatalysis to complete esterification reaction; the esterification reaction operation and the rectification operation are coupled to be completed in one esterification reaction tower, so that the reaction conversion rate and the reaction yield can be improved; the esterification reaction is an exothermic reaction, the esterification reaction and the rectification operation are completed in the esterification reaction tower at the same time, the esterification reaction heat can be applied to the rectification operation, and the energy consumption of the system is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of medicine and chemical industry, and in particular relates to a continuous esterification production process of trimethyl borate. Background technique [0002] Trimethyl borate is mainly used in the synthesis of organic borides and the preparation of high-purity boron, and can also be used as organic solvents, dehydrating agents, plasticizers, catalysts, welding fluxes and flame retardants, and can also be used as polymers stabilizer. At present, the preparation of advanced borates is mainly carried out by the transesterification method of lower borates and higher alcohols. With the development and application of domestic advanced borates and the rise of high-energy fuels, trimethyl borate as the representative The demand for lower borates will increase sharply, so it is of great significance to develop and research new methods for the preparation of trimethyl borate. [0003] The reaction of synthetic t...

Claims

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Application Information

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IPC IPC(8): C07F5/04
CPCC07F5/04
Inventor 张燕毛学峰张慧慧王涛姜大勇
Owner 烟台国邦化工机械科技有限公司
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