推动氮肥工业技术创新、促进农业绿色生态发展—“一种合成草酰胺连续工艺”专利简介

Promote Technological Innovation in Nitrogen Fertilizer Industry and Promote Agricultural Green Ecological Development—Patent Brief of “A Continuous Process for Synthetic Oxamide”

摘要: 本文概述速效氮肥工业存在的弊端，和缓效氮肥草酰胺的优点；介绍发明专利“一种合成草酰胺连续工艺”的技术内容：用气体分离技术直接从煤制合成气分离提取H₂ ≥ 99.99 v%氢和从空气分离提取N₂ ≥ 99.99 v%氮配成合成氨所需合成气用于合成氨；煤制合成气分离氢气后的CO气体，经脱氢净化后，用于气相催化合成草酸酯；用草酸酯与氨反应合成缓效氮肥草酰胺，取代现有氮肥工业必须由煤制合成气经中温和低温CO水煤气变换、生产大量CO₂气体、在高温、高压条件下用于与氨反应合成尿素或碳铵，填补国际氮肥工业长期无法大规模、直接、连续合成缓效氮肥和草酰胺二项空白，使氮肥工业的生产工艺流程和产品结构都发生变革和创新，大量生产缓效氮肥草酰胺用于农业生产，以达到提高氮肥肥效和利用率，减少氮肥的流失和浪费，达到节约资源和能源，减轻水源和环境污染，提高农业产品产量和质量，促进现代绿色生态农业生产发展，造福全人类。

Abstract: In this paper, the disadvantages of quick-acting nitrogenous fertilizer industry and the advantages of slow-acting nitrogenous fertilizer oxamide are summarized. The technical content of the patent “a continuous process for synthesizing oxamide” is introduced, which comprises the following steps of: A gas separation technology is used for directly separating and extracting H₂ more than or equal to 99.99 v% hydrogen from synthesis gas produced by coal and N₂ more than or equal to 99.99 v% nitrogen from air to prepare synthesis gas required for synthesizing ammonia for synthesizing ammonia. The co gas separated from hydrogen by the synthesis gas produced by coal is used for gas phase catalytic synthesis of oxalate after being dehydrogenated and purified. The slow-acting nitrogenous fertilize oxamide is synthesized by react oxalate with ammonia, so that that existing nitrogenous fertilizer industry must be replaced by coal-made synthetic gas which is transform by medium-temperature and low-temperature co water gas to produce a large amount of CO₂ gas, is used for synthesizing urea or ammonium carbonate by reaction with ammonia under high-temperature and high-pressure conditions, and fills the blank that the international nitrogen fertilizer industry cannot synthesize the slow-acting nitrogen fertilizer and oxamide on a large scale, directly and continuously for a long time. The production process flow and product structure of the nitrogenous fertilizer industry are changed and innovated, The large-scale production of slow-acting nitrogen fertilizer oxamide is used for agricultural production, so as to improve the efficiency and utilization rate of the nitrogen fertilizer, reduce the loss and waste of the nitrogen fertilizer, save resources and energy, reduce water sources and environmental pollution, improve the yield and quality of agricultural products, promote the development of modern green ecological agricultural production and benefit all mankind.