催化蒸馏合成乙二醇乙醚的过程模拟

PROCESS SIMULATION FOR SYNTHESIS OF CELLOSOLVE WITH CATALYTIC DISTILLATION

修正了非平衡级速率模型,使之能适用于催化蒸馏过程的模拟.此催化蒸馏塔的精馏段和提馏段为一般的填料塔结构,而反应段为CR＆L公司提出的特定结构的催化剂填充层.采用专门测定此特殊结构的催化剂填充层的气膜和液膜传质系数关联式来计算反应段中的传质速率,用Onda的关联式计算精馏段和提馏段填充层中的传质速率.结合在NKC-01分子筛催化剂上环氧乙烷与乙醇反应的动力学方程式,采用Newton-Raphson技术完成了催化蒸馏合成乙二醇乙醚过程的模拟,结果是令人满意的.

In this article the non-equilibrium stage model is modified and used for processsimulation of catalytic distillation, which consists of rectifying and stripping sections with conventional structures of a packed column and a reaction section with catalyst bed specially packed, as proposed by CR&L Co. The mass transfer rate in the reaction section is calculated by using gas and liquid film mass transfer coefficients specially measured for this structure of catalyst bed and the mass transfer rates in the rectifying and stripping sections are calculated by using Onda's correlation. The process simulation of synthesis of cellosolve with catalytic distillation is accomplished on the basis of the kinetic equation of reaction between ethanol and ethylene oxide on molecular sieve catalyst NKC-01 and the Newton-Raphson technique The results are satisfactory.