Apparatus for preparing hydrazo-dicarbonamide using urea as...

Details Apparatus for preparing hydrazo-dicarbonamide using urea as... Apparatus for preparing hydrazo-dicarbonamide using urea as...

2007-05-11

2008-09-09

Griffin, Walter D. (Department: 1797)

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

With means applying electromagnetic wave energy or...

C422S187000, C564S034000

Reexamination Certificate

active

07422727

ABSTRACT:
The present invention relates to a method and apparatus for preparing hydrazodicarbonamide using urea as starting material economically and environmentally desirably. The apparatus includes a pyrolysis furnace to obtain biuret and ammonia by pyrolyzing urea; a recrystallization reactor to purify the biuret obtained from the pyrolysis furnace; a first reactor to obtain an metal monohalobiuret salt by reacting the biuret with metal hypohalogen compound or with halogen and base; a second reactor to synthesize the hydrazodicarbonamide by reacting the monohalobiuret metal salt with ammonia; and an ammonia evaporator to separate the excess ammonia from hydrazodicarbonamide and to supply the separated ammonia to an ammonia concentrator.

REFERENCES:
Waki, Kunio; Haraguchi, Mitsuaki; Yamashita, Tadataka, The Thermal Decomposition of Hydrazodicarbamide, 1974, Nippon Kagaku Kaishi, 9, 1668-1672.

Affiliated with

Also associated with

Rating

Apparatus for preparing hydrazo-dicarbonamide using urea as... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for preparing hydrazo-dicarbonamide using urea as..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for preparing hydrazo-dicarbonamide using urea as... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3992626