Process for synthesizing methyl acetic acid catalyst by ethanol carbonylation

Abstract

The invention discloses a method for preparation of propionic acid with alcohol by carbonylation. The pretreating technique to active carbon is: treating with deionized water, drying, treating with non- organic acid and cleaning with deionized water to make it neutral, and drying. The catalyst which is supported by metallic salt solution several times is burnt in 400- 600Deg. C high temperature and in a condition of reducing gas in order to be used in the reaction process. Dissolving part soluble material in the active carbon, and none destroying the bone structure of the active carbon, it improves specific surface area and absorption ability of the active carbon, and improves the conversion rate of alcohol and the total yield of propanoic and acid propionic ether.

Description

technical field

[0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a catalyst for carbonylation of propionic acid and ethyl propionate by using ethanol and carbon monoxide as raw materials. Background technique

[0002] Propionic acid is a non-transparent liquid with a strong pungent smell. It can be miscible with water, ethanol, ether, chloroform and other organic acids in any proportion. It is an important chemical raw material. Propionic acid and its derivatives are widely used in synthetic resins, food preservation, food and feed additives, spices, pesticides and pharmaceutical intermediates, etc. In the past 10 years, the demand for propionic acid in countries including my country has grown rapidly, and this growth trend will continue in the next few years.

[0003] In the international market, Germany's BASF BASF is the main supplier of propionic acid, and its new propionic acid plant (Jiangsu Yangba Integrated...

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