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Method for preparing supported nano copper nickel catalyst and application thereof in oxidative dehydrogenation reaction of alkylol amine

A technology of nickel catalyst and nano-copper, which is applied in the direction of catalyst activation/preparation, catalyst carrier, chemical instrument and method, etc., can solve the problems of high cost and complex catalyst preparation process, and achieve the reduction of preparation cost, good industrial application prospect, high Effect of iminodiacetic acid yield

Inactive Publication Date: 2006-09-06
SHANGHAI UNIV OF ENG SCI
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to disclose a preparation method of a supported nano-copper-nickel catalyst and its use in the oxidative dehydrogenation of alcohol amines, so as to overcome the existing catalyst preparation process for the oxidative dehydrogenation of diethanolamine to iminodiacetic acid Technical deficiencies such as complexity and high cost meet the needs of the market

Method used

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Experimental program
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Embodiment 1

[0020] Commercially available γ-Al 2 o 3 The carrier was calcined at 500°C for 3h before use.

[0021] Prepare 0.5mol / L Cu(NO 3 ) 2 solution and 0.5mol / L Ni(NO 3 ) 2 , take 80ml of the above solutions and mix them, add 20 grams of the above-mentioned treated carrier γ-Al 2 o 3 After immersing at room temperature for 10 hours, dry at 100°C, then dry at 120°C for 10 hours, and finally bake at 500°C for 6 hours in the air to prepare the catalyst precursor. 2 / N 2 The mixed gas is subjected to temperature-programmed reduction, the heating rate is 3°C / min, and the final reduction temperature is 350°C for 4 hours, and Ni-Cu / γ-Al is obtained after cooling down to room temperature 2 o 3 catalyst.

Embodiment 2

[0023] Add 10 grams of diethanolamine, 2.4 grams of catalyst, 7.9 grams of sodium hydroxide and 22.6 grams of deionized water into a 0.1L autoclave, feed nitrogen to raise the pressure to 0.9MPa, and remove nitrogen from the gas outlet, repeat three times, To drive away the air in the kettle, and finally feed nitrogen to keep the pressure at about 0.9 MPa, heat to 165°C, react for 4 hours, cool to 95°C, filter while hot to obtain a solution of iminodiacetate. The concentration of iminodiacetic acid in the solution was measured by colorimetry, and the yield of iminodiacetic acid was calculated to be 90%.

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Abstract

The invention discloses a method for preparing the carrier catalyst which can be used in aminoethyl alcohol dehydrogenation reaction to prepare the iminodiacetic acid, and relative usage. It comprises following steps: using the copper salt and nickel salt as main raw material, via dipping, drying, high-temperature baking and programmed increasing temperature, to from said catalyst nanometer copper nickel composite catalyst, then using said catalyst in aminoethyl alcohol dehydrogenation reaction to prepare the iminodiacetic acid. Said inventive catalyst has higher reaction activity. And the raw materials are easily to be attained, the producing cost is lower, and it has better application prospect.

Description

technical field [0001] The invention relates to a preparation method of a supported nano-copper-nickel catalyst and its use in the oxidative dehydrogenation reaction of diethanolamine. Background technique [0002] Iminodiacetic acid is an important intermediate of pesticides and the raw material of glyphosate, the main herbicide species in the world and in China; it can also be used in the production of chelating agents, synthetic detergents and pharmaceutical products. [0003] At present, the most economical and reasonable production method of iminodiacetic acid is to prepare diethanolamine through catalytic oxidative dehydrogenation under alkaline conditions. Patents US3969398, CN1136979C, etc. all relate to methods for preparing iminodiacetic acid and its salts, all of which are catalytic oxidative dehydrogenation reactions. However, there are many problems in the catalyst preparation process, such as many kinds of raw materials and many steps in the preparation proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/02B01J37/08B01J37/16B01J23/70B01J32/00C07C249/02C07C251/08
Inventor 陈思浩王远强徐菁利曹俭李欣荣胡顺忠黄永昌范志忠
Owner SHANGHAI UNIV OF ENG SCI
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