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发明公开
CN108298563A 一种单氰胺水溶液的清洁制备方法 无效 - 驳回

一种单氰胺水溶液的清洁制备方法
摘要：
本发明属于化工领域，具体涉及一种单氰胺水溶液的清洁制备方法，该方法以单氰胺工业生产中产生的碳酸钙固废为原料，高温下与尿素反应制备石灰氮，再在水与二氧化碳的作用下制备单氰胺水溶液，同时实现碳酸钙的回收、循环、再利用。本发明设计的单氰胺水溶液的生产工艺具有收率高、成本低、生产过程不产生三废等优势，是一条经济效益与环保效益双赢的绿色之路。
摘要（英）：

The invention belongs to the field of chemical industry, and particularly relates to a clean preparation method of an aqueous cyanamide solution. Calcium carbonate solid waste produced in the industrial production of cyanamide is used as a raw material, and reacts with urea at a high temperature to prepare lime nitrogen, the aqueous cyanamide solution is prepared from the lime nitrogen under the action of water and carbon dioxide, and the recovery, recycling and reuse of calcium carbonate are realized. The production method of the aqueous cyanamide solution, designed in the invention, has theadvantages of high yield, low cost, and no production of three wastes in the production process, and is a green way with economic environmental benefits.

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