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 Synthetic Oxalic Acid Continuous Process”

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 ≥ 99.99v%氢和从空气分离提取N₂ ≥ 99.99v%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，取代现有氮肥工业由煤制合成气经中温和低温CO水煤气变换生产大量CO₂与氨高温高压合成尿素或碳铵，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，以提高氮肥肥效和利用率，减少氮肥的流失和浪费，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: This article outlines the shortcomings of the available nitrogen fertilizer industry and the ad-vantages of slow-acting nitrogen fertilizer oxamide. Introducing the technical content of the in-vention patent “A Synthetic Oxamide Continuous Process”: Separation and extraction of H₂ ≥ 99.99v% hydrogen from coal-based syngas using gas separation technology, and synthesis of ammonia from N₂ ≥ 99.99v% nitrogen synthesis ammonia synthesis gas required for synthesis of ammonia. The CO gas after the separation of hydrogen gas from coal synthesis gas was purified by dehydrogenation and used in the gas phase to synthesize oxalate, reacting oxalic acid ester with ammonia to synthesize slow-acting nitrogen fertilizer oxamide, replacing the existing nitrogen fertilizer industry. The coal-synthetic gas must be produced by middle-temperature and low-temperature CO water gas shifting, producing large amount of CO₂ gas, and reacting with nitrogen under high temperature and high pressure conditions. Urea or ammonium bicarbonate filling the international nitrogen fertilizer industry for a long period of time cannot be large-scale, direct and continuous synthesis of slow-acting nitrogen fertilizer and oxamide blank, which will transform and innovate the production process and product structure of the nitrogen fertilizer industry. A large number of slow-producing nitrogen fertilizer oxamide is used in agricultural production to increase nitrogen fertilizer efficiency and utilization, reduce nitrogen fertilizer loss and waste, achieve resource conservation and energy saving, reduce water and environmental pollution, increase agricultural product output and quality, and promote modern green ecological agricultural production development, for the benefit of all humanity.