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Environmental-protection production of hexamethylolmelamine

A technology of hexamethylolmelamine and melamine, which is applied in the field of environmental protection production of hexamethylolmelamine, can solve the problems of large pollution, high production cost, and more aldehyde-containing wastewater, and achieve low-cost effects

Inactive Publication Date: 2018-10-02
CHONGQING JIANFENG HAOKANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems in this technology are that there is a lot of aldehyde-containing wastewater, great pollution, and high production costs

Method used

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Examples

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Effect test

preparation example

[0028] Composite silver catalyst preparation example of the present invention is as follows:

[0029] Cauliflower material polysilicon (silicon content 95%) is crushed into polysilicon particles with a particle size of 20-60 mesh, placed in nitric acid (68%) for 1 hour, and then cleaned with distilled water. Then polysilicon particles are mixed with silver nitrate and copper nitrate (the silver loading is controlled to be about 15%, and the copper is controlled to be about 10%), and an appropriate amount of methanol and water (based on immersion of the polysilicon particles), the volume ratio of methanol and water It is about 1:2. Stir and adjust the temperature to about 90°C to evaporate moisture, and then dry at about 130°C to form composite particles. The composite silver catalyst of the present invention is obtained by calcining the composite particles at about 1200° C. for about 6 hours.

[0030] Table 1 shows the performance comparison between the composite silver cata...

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PUM

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Abstract

Provided is environmental-protection production of hexamethylolmelamine. Preparation is preformed on spot by improving the process, formaldehyde with high concentration of 60% or more is used, and mother liquor is completely recycled for production of hexamethylolmelamine. The production cost is further reduced and zero pollution discharge is realized.

Description

technical field [0001] The present invention relates to the production technology of hexamethylol melamine. Background technique [0002] Hexamethylolmelamine is an important raw material in industries such as adhesives and coatings. At present, the production of hexamethylol melamine generally adopts melamine and formaldehyde aqueous solution or paraformaldehyde as raw materials to carry out methylolation reaction under alkaline conditions according to a certain stoichiometric ratio, and obtains the product after dehydration and drying. The problems in this technology are that there is a lot of aldehyde-containing waste water, great pollution, and high production cost. Contents of the invention [0003] The purpose of the present invention is to provide a low-cost and zero-pollution-emission hexamethylolmelamine production process. [0004] The production technique of hexamethylolmelamine according to the present invention comprises: [0005] 1) Add formaldehyde and me...

Claims

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Application Information

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IPC IPC(8): C07D251/64B01J23/89B01J23/96C07C45/00C07C47/055
CPCB01J23/8926B01J23/96B01J37/0018B01J37/0207C07C45/002C07D251/64C07C47/04Y02P20/584
Inventor 李平王庆华周建平唐学军
Owner CHONGQING JIANFENG HAOKANG CHEM
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