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荷兰的DSM Melamine BV公司在Geleen地区投资7800万美元建一规模为3万t/a的三聚氰胺工业化工厂,预计在2002年底开工。该工厂将是第一家应用DSM公司的高压SLP(shortened-liquid)过程,据称此过程的操作步骤是采用传统气相路线的工厂操作步骤的一半,所以投资和操作费用都明显减少。DSM公司的SLP生产过程不需要催化剂,在同样温度但压力高于10 MPa的条件下使尿素转化,用分离装置从液相三聚氰胺中除去CO_2和NH_3,然后在大于4.13 MPa压力下用冷NH_3急冷。此过程
DSM Melamine BV in the Netherlands invested $ 78 million in Geleen to build a melamine industrial plant with a capacity of 30,000 t / a and is expected to start operation by the end of 2002. The plant will be the first high-voltage SLP (shortened-liquid) process to be carried out by DSM. The process is said to be one-half the number of steps in a plant operating on conventional gas-phase routes, resulting in a significant reduction in capital and operating costs. DSM’s SLP production process does not require a catalyst to convert urea at the same temperature but at pressures higher than 10 MPa, and CO 2 and NH 3 are removed from the liquid melamine by a separation unit and quenched with cold NH 3 at a pressure greater than 4.13 MPa . This process