Diethanolamine dehydrogendting process of preparing imino diacetate
A technology of iminodiacetate and diethanolamine is applied in chemical instruments and methods, preparation of cyanide reaction, preparation of organic compounds, etc., and can solve the problems of low catalyst load, large amount of catalyst, affecting the production capacity of the device and the like, Achieve the effect of increasing catalyst load, large specific surface area, and improving electron transfer ability
Inactive Publication Date: 2003-02-26
CHINA PETROLEUM & CHEM CORP +1
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- Description
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Problems solved by technology
In this document, the highest yield of the product iminodiacetate is 98.7%, but the amount of catalyst used is relatively large. In terms of every gram of raw material diethanolamine, about 0.2 grams of catalyst is needed, that is, the catalyst load is low, which affects the production capacity of the device.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 2～4
[0015] According to each operating condition and step of embodiment 1, just change catalyst composition, its reaction result is listed in table 1. 【Example 5】
Embodiment 5
[0016] According to the various steps and operating conditions of Example 1, only the consumption of raw material NaOH was changed to 18 grams, the reaction result was that the conversion rate of diethanolamine was 100%, and the yield of iminodiacetic acid was 94.9%. 【Comparative example 1~2】
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The present invention relates to a diethanolamine dehydrogenating process for preparing imino diacetate. The preparation process adopts the technological scheme includes diethanolamine and alkali metal hydroxide as raw materials, reaction condition of 140-200 deg.C temperature and 0.9-1.2 MPa reaction pressure in gauge pressure, skeleton copper as main catalyst, Ni, Mo, Co and at least one of Cr, W, B, P, V, Ce, La and Cd as cocatalyst. Compared with the existing technology, the present invention has relatively high load of catalyst, and thus higher production capacity of the plant. The process may be used in the industrial production of preparing imino diacetate.
Description
technical field [0001] The invention relates to a method for preparing iminodiacetate by dehydrogenating diethanolamine. Background technique [0002] Iminodiacetate is mainly used as an intermediate in the production of synthetic herbicide glyphosate, a widely used chelating agent and a raw material for chelating ion exchange resins. For example, in the electroplating and chemical plating industries, iminodiacetate can be used in the preparation of chemical gold plating and trivalent chromium plating solutions. In the water treatment industry, iminodiacetic acid or its water-soluble salt cooperates with other chelates to chelate calcium ions and magnesium ions; a chelating agent synthesized from iminodiacetic acid salts - surface active compound , can be used as a scale inhibitor for heat exchangers in brine systems. By introducing iminodiacetic acid into different polymerization systems, chelating cation exchange resins with various us...
Claims
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IPC IPC(8): C07C227/02C07C229/24
Inventor 刘仲能杨伟侯闽渤朱海燕
Owner CHINA PETROLEUM & CHEM CORP
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