Technologies for sulfonation including using sulfur trioxide as sulfonating agent and baking process and the sulfonation equipment such as tubular sulfonator as well are briefed.

For example, technology of multi-tube film sulfonation reactor and the reactor produced domestically; application of computer science in technology of sulfur trioxide sulfonation; product development of AOS and MES; manufacture of petroleum sulfonate and its use in tertiary process, etc.

Through calculation and analytic comparison of the ma ss transfer coeffi cient of double film and multibute film sulfonation reactor,it is showed that th e decisive factor of the mass transfer coefficient is SO 3 diffusive distance, and it's the mass transfer coefficient nearly comes in accord with the actual co nditions.

The application situation and development of domestic made film sulfonation reactor with 3.

Core equipment of sulfur trioxide sulphonation unit——sulfonation reactor;

The new developments of the sulfonation technology of toluene were reviewed,several important types of sulfonation reactors were discussed and a newly developed sulfonation technology of toluene by gaseous sulfur trioxide was reported.

A new technoloty is described for production of ureabased compound fertilizer with high N content, including the adoption of ammonization tubular reactor, rise of granulating temperature(70～80℃),decrease in granulating moisture(1.