Trimeric cyanamide joint production method using one step method

A melamine and step method technology, applied in the field of one-step melamine co-production, can solve the problems of long equipment life, high consumption of raw materials and energy, and low labor intensity, and achieve the effects of good product quality, low raw material consumption, and low labor intensity
CN1493565AInactive Publication Date: 2004-05-05河南金山化工有限责任公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
河南金山化工有限责任公司
Publication Date
2004-05-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

A one-step process for preparing both cyanuramide and the ammonium hydrogen carbonate/sodium carbonate and ammonium chloride features that the synthetic amonia is directly delivered to the cyanuramide preparing step, where it is preheated to 350-400 deg.C and used as gas carrier of fluidized bed, and the gas from liquid urea washing tower is divdied into two channels, one returning back to crystallizer and used as cold gas and another being directly used to prepare ammonium hydrogen carbonate/sodium carbonate and ammonium chloiride. Its advantages are low cost and high catalytic efficiency.
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Claims

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