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External circulation distribution system applied to esterification reaction

A technology of distribution system and esterification reaction, which is applied in chemical instruments and methods, chemical/physical processes, chemical/physical/physical chemical processes, etc., can solve the difficulties in the arrangement of acid value and molecular weight of esterification reaction products, esterification Insufficient contact of reaction materials, low production efficiency and other problems, to achieve the effect of shortening the reaction time of esterification, good atomization effect, and narrowed arrangement

Active Publication Date: 2019-04-23
ZHANGJIAGANG NANGUANG CHEM
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Problems solved by technology

Due to the difficulty in supporting the agitator and the slow speed of the traditional mechanical cantilever stirring equipment, the contact of the esterification reaction material is insufficient, and the production efficiency is low.
Although the molecular distillation device can increase the reaction speed, it consumes a lot of energy and the production cost is relatively high.
In addition, these traditional equipment are more difficult in reducing the acid value and molecular weight distribution of the esterification reaction product, and the process is complicated

Method used

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  • External circulation distribution system applied to esterification reaction

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Embodiment Construction

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments, and the mode of the present invention includes but not limited to the following embodiments.

[0030] The purpose of this embodiment is to provide a method for esterification reaction, which can make the raw materials of esterification reaction fully contact, increase the reaction activity, shorten the reaction time, and increase the synchronization of the growth of intermolecular chains, so that the molecular weight distribution can be narrowed. , The external circulation distribution system with reduced acid value of the product.

[0031] Such as figure 1 As shown, the external circulation distribution system of the present embodiment is arranged on the feed pipe of the esterification tower 7, including a material circulation pump 2, a tube condenser 3 and a stirring tower 4 connected by circulation pipelines in sequence; the material circulation pump 2 ...

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Abstract

The invention discloses an external circulation distribution system applied to an esterification reaction. The external circulation distribution system is arranged on a feeding pipe of an esterification tower and comprises a material circulation pump, a pipe bundle condenser and a stirring tower connected in sequence through circulation pipelines; a stirring circulation inlet is formed in the upper part of a side surface of the stirring tower, and a stirring tower outlet connected with an esterification tower pipeline is formed in one side of the top of the stirring tower; the stirring tower comprises a second motor and a material distributor arranged in the stirring tower, the upper end is connected with the second motor, and the lower end runs through the top center of the stirring tower and extends into a stirrer in the stirring tower; stirring blades are arranged at the lower end of the stirrer; and the material distributor is arranged between the stirring blades and the stirring circulation inlet. The system can effectively promote alcohol acid molecules in esterification reaction raw materials to be in full contact, improve the reaction activity of the esterification reaction materials, and shorten the esterification reaction time; and intermolecular chains are synchronously added, so that the molecular weight arrangement is narrowed and the product acid value is reduced.

Description

technical field [0001] The invention relates to an esterification reaction, in particular to an external circulation distribution system applied to the esterification reaction. Background technique [0002] Esterification reaction is a kind of organic chemical reaction, which is the reaction of alcohol with carboxylic acid or oxygen-containing inorganic acid to form ester and water. It is divided into three categories: the reaction of carboxylic acid with alcohol, the reaction of inorganic oxyacid with alcohol, and the reaction of inorganic strong acid with alcohol. The reaction process between carboxylic acid and alcohol is generally: the hydroxyl group in the carboxylic acid molecule combines with the hydrogen atom of the hydroxyl group in the alcohol molecule to form water, and the rest combine with each other to form an ester. This has been confirmed by tracer atoms, and it is a reversible reaction. Generally, the reaction is not complete. According to the principle of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/00
CPCB01J19/0053B01J2219/185
Inventor 颜迪冯向华
Owner ZHANGJIAGANG NANGUANG CHEM
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