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    • 80. 发明申请
    • PROCESS FOR THE PRODUCTION OF MELAMINE FROM UREA
    • 从尿素生产甲胺的方法
    • WO0100597A3
    • 2002-01-24
    • PCT/NL0000403
    • 2000-06-09
    • DSM NVWIT NORA ANNA DE
    • DE WIT NORA ANNA
    • C07D251/60
    • C07D251/60
    • Process for the production of melamine from urea by causing urea or thermal decomposition products thereof to react at elevated temperature in the presence of a catalyst in fluidised condition, the melamine vapour pressure in the reactor being less than (5.3+9*ln[(1.5*Preactor)] *T*10 MPa and the velocity of the gas in part, at least, of the reactor being greater than 0.008*(rhop*g*dp /etag) m/s, where: Preactor stands for the pressure in the reactor's synthesis zone in MPa and T for the reactor temperature in DEG C and where: rhop = density of catalyst particle in kg/m dp = average (Sauter) diameter of the catalyst in m etag = dynamic viscosity of the gas in Pa.s g = 9.8 m/s .
    • 通过使尿素或其热分解产物在流化状态的催化剂存在下在升高的温度下反应从尿素生产三聚氰胺的方法,反应器中的三聚氰胺蒸气压小于(5.3 + 9 * ln [(1.5 *预反应器)] * T * 10 -5 MPa,部分至少反应器的气体速度大于0.008 *(rhop * g * dp 2 / etag)m / s,其中 :反应器代表反应器合成区的压力,单位为℃,T为反应器温度,℃,其中:rhop =催化剂颗粒的密度,单位为kg / m 3 dp =催化剂平均(Sauter)直径(m) etag =气体的动态粘度,Pa.sg = 9.8m / s 2。