Method for preparing 13 5-triaminobenzene and hydrolyzing it into high-purity phloroglucinal
AssigneePhv Analyitic
InventorsLhassane Ismaili, Bernard Refouvelet, Alain Xicluna
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Abstract
The invention concerns a method for method for preparing 1,3,5-triaminobenzene, characterized in that it comprises a step which consists in amination of a compound of formula (I), wherein: A represents a halogen atom or a NH2 group; X1 and X2, identical or different, represent each a halogen atom, the amination step being carried out in the presence of ammonia and a catalyst selected from the group consisting of copper salts, cupric and cuprous oxides or mixtures thereof at a temperature ranging between 150° C. and 250° C. and at a pressure higher that 35 bars.
Claims16
1-15. (canceled)
A method of preparing 1,3,5-triaminobenzene, comprising a step a) of amination of a compound of formula (I):
- in which:
- A represents a halogen atom or an NH2 group,
- X1 and X2, which are identical or different, each represent a halogen atom,
- said amination step being conducted in the presence of ammonia and a catalyst selected from the group consisting of copper salts, cupric and cuprous oxides and mixtures thereof, at a temperature ranging from 150° C. to 250° C. and at a pressure of greater than 35 bar.
A phloroglucinol comprising, in total, less than 0.5% by weight of impurities, preferably less than 0.2% by weight of impurities and more preferably still less than 0.1% by weight of impurities, based on the total weight of phloroglucinol.
A phloroglucinol comprising not more than 0.1%, preferably not more than 0.05% and more preferably not more than 0.01% by weight of 3,5 dichloroaniline, phloroglucide and resorcinol, based on the total weight of phloroglucinol.
Dependencies are inferred from the claim text.