Process Performance of Dodecylbenzene Sulfonation with Liquid SO3 in a Microreactor
1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; 2. University of Chinese academy of sciences, Beijing 100049, China
Abstract：Petroleum sulfonates and heavy alkyl benzene sulfonates are important anionic surfactants used in tertiary oil recovery and the active components are alkyl benzene sulfonates. In this work, dodecylbenzene (DDB) sulfonation with liquid SO3 inmicroreactors was used as a model reaction and its reaction performance was studied in a microreactor. The effects of some important parameters on the yield of dodecylbenzene sulfonic acid are investigated, including liquid flow rate, reaction temperature, mass fraction of SO3, length of microchannel, molar ratio of SO3 to dodecylbenzene, reactor types and stirring time. The results showed that the sulfonation of dodecylbenzene is controlled by mass transfer and the initial period of sulfonation can be significantly intensified in the microreactor. With a combination of a microreactor and a tank reactor, the yield of dodecylbenzene sulfonic acid can reach 93.7% under the condition of molar ratio of SO3 to dodecylbenzene 1.1:1.
Zhu Kai 1,2,Zhao Yuchao 1 et al. Process Performance of Dodecylbenzene Sulfonation with Liquid SO3 in a Microreactor[J]. 化学反应工程与工艺, 2015, 31(3): 201-207.
