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Article: Re-using melamine off-gas: recycling ammonia and carbon dioxide generated in a melamine plant to a urea plant is not too much of problem in a closely-integrated urea-melamine operation, but it is less straightforward if the process units are not close together. The Pulawy Nitrogen Works in Poland has come up with its own way round this problem. (Urea Production).
- Article from:
- Nitrogen & Methanol
- Article date:
- July 1, 2003
CopyrightCOPYRIGHT 2003 BCInsight LTD. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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There are various ways of reusing the off-gases (ammonia and carbon dioxide) from pressurized melamine units by introducing them directly to the reaction system of a urea plant or, where the condensation system is operated under a pressure equal to the pressure in the urea reactor, into the high-pressure carbamate condenser. But those ideas are only economically attractive when the melamine plant operates at or above the pressure in the urea plant. In any case, even where the process conditions permit it, it is undesirable to recycle the off-gases from a melamine plant to a urea plant unless the two plants are sited very close together because of the dangerous nature of ...
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Article: Urea plant gets government approval.(VIETNAM)
Nitrogen & Methanol;
July 1, 2005 ;
641 words
... ... 400m, 560,000t/y coalbased prilled urea plant in the northern Ninh Binh province ... easier. This is the second coal-based urea plant in Vietnam, the first being the Habac ... and Chemical Co.'s (Hanichemco) urea plant in Ha Bac province, North Vietnam.
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