CIESC Journal ›› 2022, Vol. 73 ›› Issue (3): 1184-1193.DOI: 10.11949/0438-1157.20211523

• Catalysis, kinetics and reactors • Previous Articles     Next Articles

Study on the continuous synthesis process of industrial mixed linear alkyl benzene sulfonates in a microchannel reactor

Yiming XU1(),Hua YUAN2,Suli LIU2,Ping LI1(),Peirong YAN1,Xi ZHAO1,Junhua LU1,Wei ZHAO1,Xuelan ZHANG1   

  1. 1.State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, Ningxia, China
    2.Ningxia Coal Industry Group Co. Ltd. , CHN ENERGY, Yinchuan 750011, Ningxia, China
  • Received:2021-10-26 Revised:2021-12-11 Online:2022-03-14 Published:2022-03-15
  • Contact: Ping LI

微通道反应器中工业混合直链烷基苯磺酸盐的连续合成工艺研究

徐一鸣1(),袁华2,刘素丽2,李平1(),严佩蓉1,赵曦1,卢俊华1,赵唯1,张学兰1   

  1. 1.宁夏大学化学化工学院,省部共建煤炭高效利用与绿色化工国家重点实验室,宁夏 银川 750021
    2.国家能源集团宁夏煤业有限责任公司,宁夏 银川 750011
  • 通讯作者: 李平
  • 作者简介:徐一鸣(1994—),女,硕士研究生,junshaxi@163.com
  • 基金资助:
    国家自然科学基金项目(22068030);宁夏回族自治区国内一流学科建设项目(NXYLXK2017A04)

Abstract:

Linear alkyl benzene sulfonic acid and its derivatives, straight-chain alkyl benzene sulfonates, are a class of inexpensive surfactants that are widely used in washing and tertiary oil recovery. In this experiment, we propose a continuous synthesis process of linear alkylbenzene sulfonic acid using Linear alkylbenzene produced from industrial mixed olefins in a coal-to-oil enterprise in a microreactor, and investigate the influence of process conditions such as sulfonation temperature, molar ratio of raw materials and concentration of sulfonating agent. It was found that the individual process conditions during the mixed straight-chain alkylbenzene sulfonation process had a significant effect on the product yield. Under the conditions of reaction temperature of 50℃, SO3∶LAB molar ratio of 1.0∶1 and residence time of 5.09 s, the final product could reach 94.5%(mass) of active species. Meanwhile, a microreactor pilot platform was designed and built to realize the continuous synthesis of mixed alkylbenzene sulfonate,and the yield of sulfonate product was over 90%. The study can provide technical support for the industrial application of the process.

Key words: microreactor, sulfonation, linear alkyl benzene sulphonic acid, liquid sulfur trioxide, surfactants

摘要:

直链烷基苯磺酸是一种重要的阴离子表面活性剂,由其合成的直链烷基苯磺酸盐是价格低廉的表面活性剂之一,广泛应用于洗涤和三次采油等领域。以某煤制油企业的工业混合烯烃生产的直链烷基苯为原料,在微通道反应器中连续合成直链烷基苯磺酸,考察磺化温度、原料摩尔比以及磺化剂浓度等工艺条件对磺酸产物的影响规律,并与纯十六烷基苯磺化规律进行对比。研究发现混合直链烷基苯磺化过程中各个工艺条件对产品收率的影响较大。在反应温度为50℃,SO3与LAB摩尔比为1.0∶1,停留时间为5.09 s条件下,最终产品中活性物含量可达到94.5%(质量)。同时,设计并搭建了微反应器小试平台,实现连续合成混合烷基苯磺酸盐,磺酸盐产品收率在90%以上,可为该工艺的工业应用提供技术支持。

关键词: 微反应器, 磺化, 直链烷基苯磺酸, 液相三氧化硫, 表面活性剂

CLC Number: