新型硫酸法C_4烷基化工艺的模拟  

Simulation of a Novel C_4 Alkylation Process with Sulfuric Acid as Catalyst

作　　者：原平方[1,2,3] 刘春江[1,2,3] 

机构地区：[1]天津大学化工学院,天津300072 [2]化学工程联合国家重点实验室(天津大学),天津300072 [3]天津化学化工协同创新中心,天津300072

出　　处：《石油化工》2015年第5期543-547,共5页Petrochemical Technology

摘　　要：提出了一种新型硫酸法C4烷基化生产工艺,丁烯原料在气相状态下进入反应器,与液相异丁烷、浓硫酸混合后,部分丁烯溶于液相,在液相中进行反应;通过控制反应器的压力,部分液相吸收反应热而汽化,使反应温度基本稳定;经气液分离、酸烃分离及产品分馏后,气相丁烯、异丁烷、浓硫酸分别构成循环。采用Aspen Plus过程模拟软件对新工艺过程进行模拟计算的结果表明,在反应器进口压力0.2 MPa、压降4.5 k Pa的条件下,反应器进出口温度均在7.2℃左右,可通过调节反应器压力实现温度的控制;反应器进口液相中烷烯质量比为145∶1,可减少副反应的发生;与传统硫酸法C4烷基化工艺相比,新工艺耗电量可降低30%。A novel C4 alkylation process with sulfuric acid as catalyst was proposed, in which butene gas was led into reactor and mixed with isobutane liquid and concentrated sulfuric acid, and then the C4 alkylation was conducted in the liquid phase. By controlling pressure in the reactor, a part of the liquid evaporated so the reaction temperature could be kept stable. After gas-liquid separation, acid-hydrocarbon separation and product distillation, the butene gas, isobutane and sulfuric acid formed loops separately. The novel process was simulated by means of Aspen Plus software. The results showed that both the temperatures at the inlet and outlet of the reactor were kept at about 7.2 ℃ under the conditions of the inlet pressure 0.2 MPa and the pressure drop 4.5 kPa. When the mass ratio of alkanes to olefins in the liquid phase at the reactor inlet was 145 ： 1, side-reactions could be reduced. And the power consumption of the novel process was reduced by 30% compared with traditional alkylation process.

关 键 词：碳四烷基化 硫酸催化剂 ASPEN PLUS软件 过程模拟 

分 类 号：TQ032[化学工程]