The development and industrialization process in methyl mercaptan synthesis with hydrogen sulfide and methanol in domestic and international field were introduced.The reaction mechanism for the process was discussed,and the key points of reaction were to reduce the alkaline of hydroxy on methanol and enhance nucleophilic performance of hydrogen sulfide.The type of catalyst,catalytic mechanism and research progress on catalyst were mainly discussed,and the application of acid and alkali catalytic theory in the progress was emphasized in this paper.
This paper introduced general situation of nitrobenzene production at home and aboard,as well typical occupational accidents.It is studied how to ensure safe production with device practice.
Based on the ingredients of latex emulsion matrix and the related accidents at home and abroad in recent years,we will analyze and judge the risks exist in the preparation of the traditional emulsion matrix,put forward the corresponding opinions,analyze the advantages of site mixed emulsion matrix in preparation and application,and point out the necessity of the popularization of site mixed emulsion explosive technology.
The enterprise’s execution status of production and business operation plan was analyzed by flexible using statistical calculation method,statistical chart,statistical analysis method,the main cause effecting target plan complete was analyzed and searched.
This paper briefly describes the operational principles and main characters of regulating valve with intelligent valve locator in automatic control system.It also introduces some application problems related to this kind of valve in pipe rolling and metallurgy automatic control system of Hengyang Valin Steel Tube Co.,Ltd.(Hereinafter refer as Heng-steel in short),and some skills and methods of fault treatment as well.
