high efficient tower tray method,suitable parameter method and double towers synthesis method were suggested,the principle of energy conservation,process technology and technology key for each scheme were described,th.

An emphasis is laid on the mechanism in two-step synthesis method.

The two step synthesis of stearic acid diethanolamide gives the product as pure as the product of ester exchanging method.

The revamp was conducted to replace traditional common trays with highly efficient wave-shaped trays to enhance the mass transfer and heat transfer in the converter.

Author systematically introduced the methanol converter technology which has been industrialized in modern times, and also the another methanol converter technology which is being now developed; therein mainly in allusion to the two kinds of methanol converters above mentioned, comparison was made from the aspects of converter type, technical process parameters, utilization of catalyst and so on.

The structure and process for internal of ammonia converter with one axial bed and three radial beds were introduced, the filling situation, scheme and course of heating and reducing for A202, A110-1 type of catalyst were described, both experience and lesson for heating and reducing were summarized.