Research And Exploitation On The New Technics Of BHT Procreative Process

This article focuses on the study and improves of BHT product techniques. The new product technique of BHT with the character of enterprise is developed from those adopted in ZHONGSHAN refined chemical plant of Nanjing and SANYE industry trade company of Lanzhou. After applied in practice product, this new technique has been proved useful and the result of utilize is satisfied. In this study, experts choose the utilized catalyst by plus-relationship experiment。Then put out the idea that uses thick new type acid instead of resin catalyzer. The result of this replacement gives satisfaction. The adoption of new type acid as catalyst has many advantages: lessen the alkylation reaction time, increased the BHT fraction, decreased the cost of IB, lowered the consumption of catalyst, and the economic performance increased greatly. This text consider the neutralize process of alkylation fluid, and then make clear the best technique condition of neutralization. In this way, can make the cost of raw material controllable and make the wastewater utilizable. And more, it also can solve the potential environment problem cause by the use of new type acid as catalyst.In this new technique improved the distillation unit: the preliminary distillation is come off. Then discuss the better operate conditions of distillation process. By improving the technique method and changing the process conditions make the separation more efficiency. In this way, we can get the productions such as superposition oil,odd butyl phenol and BHT of high concentration which make it differ from other techniques. In crystal unit, during the beginning of production, production granularity is relatively thin and small its figure is powder, production become yellow easily beyond three months, crystal restrict sale. We have searched the best technique condition by testing and putting forward practical solution. And put out the answers on solving problems in practice production. In this article, put out the idea of use vacumn as drier instead of air-drier and make out the concrete method of this process that make the grain degree and the storage of BHT under control. In addition,some new ideas about analysis brought up in this article, such as use density test instead of chromatogram test, in order to make the examination of alkylation fluid more convenient and faster.