Method for preparing hydrazodicarbonamide using biuret as...

Details Method for preparing hydrazodicarbonamide using biuret as... Method for preparing hydrazodicarbonamide using biuret as...

2004-12-17

2008-12-16

Sergent, Rabon (Department: 1796)

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

Organic compounds

Amino nitrogen containing

C564S034000

Reexamination Certificate

active

07465828

ABSTRACT:
The method for preparing hydrazodicarbonamide (HDCA) using biuret as a starting material is disclosed. The method comprises the steps of; obtaining metal monohalobiuret salt by reacting a biuret with a metal hypohalogen compound, or by reacting the biuret with a halogenating agent and a base; and reacting the obtained metal monohalobiuret salt with ammonia, wherein the hydrazodicarbonamide is produced in the presence of a catalyst including bromine or iodine atom and generating bromine or iodine ion during the reaction.

REFERENCES:
patent: 6635785 (2003-10-01), Lee et al.
patent: 2004/0199012 (2004-10-01), Lee et al.
patent: 2001-68668 (2001-07-01), None
Morrison, Robert, and Boyd, Robert. “Organic Chemistry. 3rdEdition.” Boston: Allyn and Bacon, Inc. 1966.
International Preliminary Examination Report dated Sep. 30, 2004.

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