Tech, Process for dimethyl violuric acid catalyzing hydrogenation reaction

A dimethyl violuric acid, catalytic hydrogenation technology, applied in the direction of organic chemistry, can solve the problems of unreported hydrogenation reaction of dimethyl violuric acid, pollute the environment, safety hazards and other problems, and achieve easy industrial scale-up production , no pollution to the environment, mild reaction conditions

Inactive Publication Date: 2006-06-28
天津市瑞凯科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of separating from the product, once the framework nickel is exposed to the air, it is easy to catch fire, which brings great safety hazards to production.
In addition, the skeleton nickel catalyst also has unfavorable factors such as environmental pollution, so it is urgent to develop a new catalyst with high efficiency and environmental friendliness.
In recent years, there are many reports on the use of amorphous alloy catalysts in various hydrogenation reactions in literature and patents, but there is no report on the hydrogenation reaction of dimethyl violin acid.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A NiB / MgO (CN200310107517.2) amorphous alloy catalyst was prepared by a metal-induced electroless plating method. The prepared catalyst is washed with water until neutral, then washed with absolute ethanol and stored in absolute ethanol.

[0018] A 100ml autoclave was used to carry out the hydrogenation reaction of dimethyl violuric acid. Reaction conditions: 75ml water, 15g dimethyl violuric acid, 1.3gNiB / MgO amorphous alloy catalyst (converted into dry weight); hydrogen pressure 0.4MPa; stirring speed: 800 rpm; reaction temperature and reaction time And the evaluation results are listed in Table 1.

Embodiment 2

[0020] Change the MgO carrier in embodiment 1 into Al 2 o 3 Carrier, others are all the same as embodiment 1. The results are shown in Table 1.

Embodiment 3

[0022] The MgO carrier in Example 1 is changed to a white carbon black carrier, and the others are the same as in Example 1. The results are shown in Table 1.

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PUM

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Abstract

The invention relates to a technology method dimethyl purple urea acid catalyst hydrogenation reaction that uses inorganic oxygen as carrier, uses load type NiB, NiCoB amorphous alloy as catalyst and dimethyl purple urea acid hydrogenation reacting to make 1, 3-dimethyl-4-amino group-5-formamido urea. The invention has good catalyst activity in dimethyl purple urea acid hydrogenation reacting, and has no influent by high temperature. It is save, no pollution, mild reacting condition, and simple technology.

Description

technical field [0001] The invention relates to a catalytic hydrogenation reaction, in particular to a process method for the catalytic hydrogenation reaction of dimethyl violin acid. The supported NiB and NiCoB amorphous alloy catalysts prepared by the metal-induced electroless plating method are prepared in dimethyl violin urea Application technology in the preparation of 1,3-dimethyl-4-amino-5-formylsemicarbazine by acid hydrogenation reaction. Background technique [0002] 1,3-Dimethyl-4-imino-5-isonitrosourazine is referred to as dimethyl NAU for short. Because it is a purple solid containing crystal water, it is commonly known as dimethyl violin. Its hydrogenation product is 1,3-dimethyl-4,5-semicarbazine, referred to as dimethyl DAU. Dimethyl DAU is unstable and reacts with formic acid to obtain a stable product 1,3-dimethyl-4-amino-5-formylsemicarbazine after acylation, referred to as dimethyl FAU. Dimethyl FAU is an important organic intermediate widely used in me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D403/12
Inventor 李伟王全义边俊民张志丽王广柏张明慧陶克毅
Owner 天津市瑞凯科技发展有限公司
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