Research And Optimization Of Styrene Production Technology

Styrene is an important basic petrochemical raw material.A variety of new materials with styrene as raw material continue to emerge leading to styrene market demand growth.With the new plants in Asia and the Middle East have been put into operation and the production of styrene has gradually shifted to China, styrene enterprises in China will face more and more challenges. It is the inevitable trendency of the existing styrene enterprises to reduce the production cost by optimizing the transformation,saving energy and reducing consumption. Based on styrene capacity and market outlook, the development prospect of styrene is predicted. Some suggestions are also put forward on the problems encountered in the development of styrene production enterprises in China.The production method of Jilin Petrochemical 320 thousand t/a styrene plant is LUMMUS-UOP process of ethylbenzene dehydrogenation. The technological advantages of this process are discussed in this paper, and the factors that affect the reaction efficiency and the energy consumption of the plant are analyzed.The Ethylbenzene / Styrene Separation Tower(DA-401) has a problem that the separation efficiency of the tower is getting lower and lower than the design.By replacing part of the distributor, increasing the packing layer height, replacing the gas distributor at the bottlom of tower, adjusting the distributor level etc.,the separation efficiency of the tower has been significantly improved,and 7.474 million Yuan benefits have been created in the year 2015. For the activity decline of the transalkylation reaction catalyst, we increase the conversion of polyethylbenzene rate from 41.6% to 55.2% by adjusting reaction temperature, controlling the reasonable ratio of benzene/ethyl benzene, removing the butylbenzene in ethylbenzene by distillation, thermal circulation of benzene etc..With the progress of process technology, the comprehensive energy consumption of SM Plant dropped about 41524 kcal/t styrene than the design, and the competitiveness of the product is significantly improved.