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Process for synthesizing methyl acetic acid catalyst by ethanol carbonylation

A technology of chemical synthesis and catalyst, which is applied in the direction of catalyst activation/preparation, carbon monoxide reaction to prepare carboxylic acid, physical/chemical process catalyst, etc. It can solve the problem of low space-time velocity of ethanol and achieve the effect of improving conversion rate

Inactive Publication Date: 2006-02-22
SHANGHAI WUJING CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the research results show that the space-time velocity of ethanol in the carbonylation process is relatively low

Method used

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  • Process for synthesizing methyl acetic acid catalyst by ethanol carbonylation

Examples

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Effect test

Embodiment 1

[0026] Take by weighing 50 grams of commercial activated carbon (coconut shell), boil in 250ml deionized water for 4 hours, then dry at 120°C for 12 hours, then reflux and boil for 3 hours in a 2% nitric acid solution by weight percentage, then boil at 120°C °C for 12 hours.

[0027] The pretreated activated carbon (AC) is placed in a water bath at 50°C and vacuumized to remove the adsorbed gas and reduce the penetration time of the metal solution. The activated carbon after vacuuming was thrown into the nickel nitrate solution of 3.84% by weight and soaked for 24 hours, then filtered off the excess solution, dried at 80°C for 6 hours, and then dried at 120°C for 6 hours. After taking it out, put it in a water bath at 50°C, put the activated carbon after vacuuming into a 3.84% nickel nitrate solution by weight and soak it for 24 hours, then filter off the excess solution, and dry it at 80°C for 6 hours. It was further dried at 120° C. for 6 hours. In this way, nickel-loaded ...

Embodiment 2

[0030] Except that the nickel nitrate solution of 15% and the copper nitrate solution of 8.6% are selected for use, other conditions and processes are the same as in Example 1, and the catalyst Ni-Cu with a loading of nickel of 10% and a loading of copper of 6% is prepared. / AC. The conversion of ethanol obtained was 90%. The total yield of propionic acid and ethyl propionate was 43%.

Embodiment 3

[0032] Except that the commercial activated carbon was not washed with water, the other preparation process was the same as in Example 1, and a catalyst Ni-Cu / AC with a nickel loading of 5% and a copper loading of 6% was prepared. The conversion of ethanol obtained was 88%. The total yield of propionic acid and ethyl propionate was 30%.

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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...

Claims

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Application Information

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IPC IPC(8): B01J37/02C07C51/12C07C53/122
Inventor 袁传敏曹智龙李彩云张亚珍何志祥陆鑫华
Owner SHANGHAI WUJING CHEM
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