Hydrogenation reduction method for aminolysis object serving as intermediate of active blue 198

A technology of reactive blue and body amine, applied in the field of reductive hydrogenation, can solve the problems of increasing production costs, etc., and achieve the effect of short time, low production cost and green production process

Inactive Publication Date: 2017-11-24
YANCHENG OUHUA CHEM IND +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patented method uses an organic solution, which involves the recovery of the organic solution after the reaction, which increases the production cost

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  • Hydrogenation reduction method for aminolysis object serving as intermediate of active blue 198
  • Hydrogenation reduction method for aminolysis object serving as intermediate of active blue 198
  • Hydrogenation reduction method for aminolysis object serving as intermediate of active blue 198

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Embodiment Construction

[0010] The technical solutions of the present invention will be described in further detail below through specific implementation methods.

[0011] In the 6 groups of experiments, 50g of the ammonium hydrolyzate was put into the reaction kettle, then the hydrogen valve was opened, hydrogen was introduced three times, and emptied three times, the air in the reaction kettle was driven away, the pressure was controlled respectively, the temperature was raised to the temperature in the table, and the temperature was kept. And record the hydrogen consumption rate, check and record the hydrogen consumption rate every 5 minutes, if there is no change in pressure, it is regarded as no hydrogen consumption, and the reaction is over. The results are shown in Table 1, wherein the water is deionized water, the reduced product is the final product, and the double-shrunk reduced product is a by-product, and the reaction equations of the reduced product and the double-shrunk reduced product a...

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Abstract

The invention provides a hydrogenation reduction method for an aminolysis object serving as an intermediate of active blue 198. The method is used for the hydrogenation reduction of the aminolysis object serving as the intermediate of the active blue 198. The method comprises the following steps: adding 100 mass parts of the aminolysis object and 1 to 3 mass parts of raney nickel into 500 to 1,000 mass parts of deionized water, feeding H2, and performing reaction at pressure of 0.5 to 3 MPa and 60 to 85 DEG C. The hydrogenation reduction method has the advantages of low production cost and green technology.

Description

technical field [0001] The invention belongs to the field of reduction and hydrogenation of p-nitrobenzenesulfonic acid substances, and specifically relates to a method for hydrogenation and reduction of active blue 198 intermediate amine hydrolyzate. Background technique [0002] The reactive blue 198 ammonium hydrolyzate is 2-(2-amino-ethylamino)-5-nitro-benzenesulfonic acid, and its reduction reaction adopts iron powder reduction method. Although this method has a simple process, a large amount of "iron slime" and waste water containing aromatic amines will be produced during the production process, causing serious environmental pollution. In today's increasingly stringent requirements for environmental protection, it is necessary to reform the process of reducing nitro by iron powder. [0003] Chinese patent 200810223416.4 discloses a method for preparing aminobenzenesulfonic acid by catalytic hydrogenation. Nitrobenzenesulfonic acid is mixed in an organic solution with...

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C07C303/22C07C309/46
CPCC07C303/22C07C309/46
Inventor王志伟郭宇时娇娇于光欣李超祁广娟余新云
OwnerYANCHENG OUHUA CHEM IND