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Production method of2-ethyl hexanoic acid

A technology of ethylhexanoic acid and its manufacturing method, which is applied in the preparation of carboxylate salts, chemical instruments and methods, and the preparation of organic compounds, and can solve the problems of high manufacturing cost, high reaction temperature, and increased side reactions of 2-ethylhexanoic acid and other problems, to achieve the effect of suppressing side reactions, good effect, and reducing reaction time

Inactive Publication Date: 2003-04-16
QILU PETRO CHEM - SINOPEC
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology allows for faster chemical processes with improved product yields while reducing costs associated therewith. By utilizing an apparatus that falls down into droplets, it becomes possible to carryout these steps quickly and efficiently. Additionally, this process uses less energy compared to traditional methods like stirring up liquid solutions during batch processing instead of requiring large amounts of electricity. Overall, this new method provides technical benefits such as increased yield rates from ethanolamines due to shorter exposure times, reduced formation of unwanted compounds (such as aldehydes), lowered manufacturing costs caused by decreased use of fossil fuels, better control over specific types of products produced through this technique, etcetera

Problems solved by technology

The technical problem addressed in this patents is how to efficiently make certain chemical substances called 2-alkenoate hydroxycarboyductors (BAs), specifically B-2-methyldecane dicer oil diacid) without generating harmful waste streams due to their poor yield compared to other types of starting materials.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] The falling film reaction equipment is a glass tube with an inner diameter of 20 mm and a height of 1500 mm, with a glass jacket on the outside, and cooling water at 18°C. Contain 2-ethylhexanal 20% 2-ethylhexanal and 2-ethylhexanoic acid mixed solution to join in the falling film reaction equipment with the speed of 4g / min, contain the Mn(Ac) of 0.2% in the solution 2 . Under normal pressure, oxygen is fed at a rate of 0.14 g / min, and the amount of oxygen fed is 1.2 times of the theoretical amount. During the reaction, the inner wall temperature of the reaction equipment was 24°C. The reaction product flows into the product collector along the inner wall. During the reaction process, product samples were taken for analysis, and the conversion rate of 2-ethylhexanal was 99.7%, and the selectivity of 2-ethylhexanoic acid was 95.6%.

Embodiment 2

[0029] The falling film reaction equipment is the same as in Example 1. Pass cooling water at 18°C. A mixed solution of 2-ethylhexanal and 2-ethylhexanoic acid containing 30% of 2-ethylhexanal was added to the falling film reaction device at a speed of 4 g / min, and the solution contained 0.1% KAc. Oxygen is fed at a rate of 0.21 g / min under normal pressure, and the amount of oxygen fed is 1.2 times the theoretical amount. During the reaction, the inner wall temperature of the reaction equipment was 24°C. The reaction product flows into the product collector along the inner wall. During the reaction process, the product samples were taken for analysis, and the conversion rate of 2-ethylhexanal was 99.6%, and the selectivity of 2-ethylhexanoic acid was 95.8%.

Embodiment 3

[0031] The falling film reaction equipment is the same as in Example 1. Pass cooling water at 22°C. Containing 2-ethylhexanal 15% 2-ethylhexanal and n-butyric acid mixed solution joins in the falling film reaction equipment with the speed of 4g / min, contains 0.2% Cu(Ac) in the solution 2 . Oxygen is introduced at a rate of 0.11 g / min under normal pressure, and the amount of oxygen introduced is 1.2 times of the theoretical amount. During the reaction, the inner wall temperature of the reaction equipment was 30°C. The reaction product flows into the product collector along the inner wall. During the reaction process, product samples were taken for analysis, and the conversion rate of 2-ethylhexanal was 99.3%, and the selectivity of 2-ethylhexanoic acid was 94.9%.

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Abstract

A process for preparing 2-ethyl hexanoic acid features that under the existance of catalyst, which may be Mn(Ac)2, KAc, Cu(Ac)2 or NaAc, or their mixture, the mixture of the raw material containing 2-ethyl hexanal and solvent and the oxygen contained gas take part in oxidizing reaction in a falling-film reactor. Its advantages are short reaction period, less by-reaction, low cost, high transformer rate (more than 99.5%) and high selectivity (more than 95%).

Description

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Claims

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Application Information

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Owner QILU PETRO CHEM - SINOPEC
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