Method of joint production of urea hydrogen peroxide and sodium percarbonate

A technology of urea peroxide and sodium percarbonate, applied in the direction of chemical instruments and methods, peroxide/peroxyhydrate/peroxyacid/superoxide/ozonide, organic compound preparation, etc. To avoid problems such as other methods of urea peroxide, hydrogen peroxide waste, and low production costs, to avoid adverse effects, mild reaction conditions, and reduce production costs
CN101786969AInactive Publication Date: 2010-07-28HEBEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEBEI UNIV OF TECH
Publication Date
2010-07-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method of joint production of urea hydrogen peroxide and sodium percarbonate, comprising the following steps: in a material system at the following mass ratio that sodium carbonate: urea: hydrogen peroxide: water is 1:1.30-1.60:0.42-0.45:2.75-3.20, crystallization filtering is carried out at the temperature of 0 DEG C, the obtained solid phase is dried at the temperatureof 60 DEG C to obtain sodium percarbonate, and the residual mother solution S is evaporated and concentrated; and after parts of separated sodium carbonate are evaporated to dryness, urea and hydrogen peroxide of which the mass concentration is 30% are added to ensure that the mass ratio in the system is as follows: sodium carbonate: urea: hydrogen peroxide: water is 1:14.00-16.00:5.50-7.50:14.00-16.50, crystallization filtering is carried out at the temperature of 0 DEG C, the obtained solid phase is urea hydrogen peroxide, and sodium carbonate is added into the liquid phase to ensure that the mass ratio in the system is still as follows: sodium carbonate: urea: hydrogen peroxide: water is 1:1.30-1.60:0.42-0.45:2.75-3.20, and thus cycle production is realized. The invention adopts mild reaction conditions and convenient operation, improves the economy of the urea hydrogen peroxide preparation technology, avoids adverse effect on environment due to mother solution abandonment and lowers production cost.
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Description

technical field

[0001] The technical scheme of the present invention relates to the preparation method of urea peroxide and sodium percarbonate, particularly the method for the joint production of urea peroxide and sodium percarbonate. Background technique

[0002] Urea peroxide [CO(NH 2 ) 2 ·H 2 o 2 ] is a 1:1 adduct formed by hydrogen peroxide binding to urea in a hydrogen bond manner. It is a non-toxic, odorless white crystalline powder. Compared with hydrogen peroxide, peracetic acid and other solid peroxides , Urea peroxide has the characteristics of wide bactericidal spectrum, strong bactericidal power, low concentration, short disinfection time, and no residual toxicity after disinfection. As a solid oxidant and an oxygen source providing reagent, urea peroxide can be widely used in bleaching, textiles, waste treatment, daily chemical industry, medicine, agriculture, aquaculture and other fields.

[0003] The production of urea peroxide generally adopts the wet p...

Claims

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