Process for preparing pure cyanuric acid

Details Process for preparing pure cyanuric acid Process for preparing pure cyanuric acid

1980-07-01

1981-07-14

Ford, John M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

C07D25132

Patent

active

042787947

ABSTRACT:
Pure cyanuric acid is prepared from crude or waste melamine by introducing the melamine into 70 to 80% strength sulfuric acid at room temperature and heating the reaction mixture to 150.degree. to 190.degree. C., the water introduced with the sulfuric acid being distilled off during the heating period.

REFERENCES:
patent: 3563987 (1971-02-01), Berkowitz
patent: 3761474 (1973-09-01), Mesiah
patent: 3886153 (1975-05-01), Berkowitz
patent: 3996225 (1976-12-01), Gray et al.
patent: 4029660 (1977-06-01), Berkowitz
patent: 4031091 (1977-06-01), Berkowitz et al.

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