Study on vapor-liquid equilibria and distillation simulation of 1,3,5-trimethylbenzene-1,2,4-trimethylbenzene and 1,3,5-trimethylbenzene-2-ethyltoluene at 2 kPa

doi:10.11949/0438-1157.20210281

Abstract

Abstract:

1,3,5-trimethylbenzene is an important chemical raw material and usually exists in reformed heavy aromatics. It is difficult to separate 1,3,5-trimethylbenzene from 1,2,4-trimethylbenzene and 2-ethyltoluene in the C₉ aromatics mixture. The vapor-liquid equilibrium (VLE) data of 1,?3,?5-trimethylbenzene (1)?-1,?2,?4-trimethylbenzene (2) and 1,3,5-trimethylbenzene (1)-2-ethyltoluene (3) were measured at 2 kPa and then correlated by the activity coefficient models NRTL and UNIQUAC. The binary interaction parameters were obtained through regression. The thermodynamic consistency was checked as well. The results showed that 1,3,5-trimethylbenzene and 2-ethyltoluene could hardly be separated at 2 kPa by ordinary distillation. After the alkylation reaction of the ternary system (1,3,5-trimethylbenzene-1,2,4-trimethylbenzene-2-ethyltoluene), single-column and double-column distillation processes at low pressure were used to separate the reaction products by simulation, respectively. Compared to the single-column distillation process, the double-column one presented a better separation performance. The suitable separation parameters were obtained as follows: the number of stages in both columns was 50, and the reflux ratios were 7 and 8 respectively. The purity of 1,3,5-trimethylbenzene could reach 98%(mass) accordingly. This study not only fills in VLE database, but also provides a feasible method for the separation of C₉ aromatics at low pressure.

Key words: trimethylbenzene, vapor-liquid equilibria, separation, activity coefficient, process simulation

摘要：

均三甲苯是一种重要的化工原料，通常存在于重整重芳烃中，其中均三甲苯与偏三甲苯、邻甲乙苯的分离较为困难。测定了2 kPa下均三甲苯(1)-偏三甲苯(2)、均三甲苯(1)-邻甲乙苯(3)两个体系的汽液相平衡数据，并分别采用NRTL和UNIQUAC活度系数模型对相平衡数据进行关联，回归获得二元交互参数，并进行了热力学一致性检验。结果表明，在2 kPa下，均三甲苯与邻甲乙苯无法通过普通精馏实现分离。通过对均三甲苯-偏三甲苯-邻甲乙苯体系进行烷基化反应，而后分别采用单塔减压精馏和双塔减压精馏对反应产物的分离进行精馏模拟，得出较优工艺为双塔连续减压精馏，两塔塔板数分别为50，回流比分别为7和8，此时均三甲苯纯度可达98%(质量)。该研究不仅补充了汽液相平衡数据库，也为低压下C₉体系的分离工艺设计提供参考。

关键词: 三甲苯, 汽液平衡, 分离, 活度系数, 流程模拟

CLC Number:

TQ 013.1

Jianyuan XU, Yanyang WU, Jumei XU, Yangfeng PENG. Study on vapor-liquid equilibria and distillation simulation of 1,3,5-trimethylbenzene-1,2,4-trimethylbenzene and 1,3,5-trimethylbenzene-2-ethyltoluene at 2 kPa[J]. CIESC Journal, 2021, 72(9): 4504-4510.

徐健元, 吴艳阳, 徐菊美, 彭阳峰. 2 kPa下均三甲苯-偏三甲苯与均三甲苯-邻甲乙苯体系二元汽液相平衡数据研究及精馏模拟[J]. 化工学报, 2021, 72(9): 4504-4510.

Figures/Tables 10

Table 1 Boiling points and Antoine constants of experimental materials

原料	沸点(2 kPa)/K^①	Antoine常数^②[18]			Antione常数适用的温度范围/K
原料	沸点(2 kPa)/K^①	A	B	C	Antione常数适用的温度范围/K
均三甲苯	329.41	7.07436	1569.622	209.578	322.15~466.15
偏三甲苯	332.43	7.04383	1573.267	208.564	325.15~471.15
邻甲乙苯	329.27	7.00314	1535.374	207.300	321.15~467.15

Fig.1 Modified Rose vapor-liquid equilibrium still

Table 2 Vapor-liquid equilibria data at 2 kPa

T/K	$x_{1}$ ^①	$y_{1}$ ^②	$γ_{1}$	$γ_{2}$
均三甲苯(1)-偏三甲苯(2)
332.43	0.0000	0.0000	—	1.0000
332.05	0.0598	0.0759	1.1120	1.0016
331.79	0.1061	0.1329	1.1117	1.0014
331.52	0.1509	0.1875	1.1177	1.0013
331.32	0.1980	0.2404	1.1031	1.0011
331.05	0.2601	0.3076	1.0891	1.0026
330.88	0.3051	0.3547	1.0798	1.0035
330.67	0.3615	0.4096	1.0635	1.0099
330.53	0.4042	0.4507	1.0539	1.0140
330.42	0.4451	0.4872	1.0403	1.0221
330.20	0.5276	0.5623	1.0242	1.0362
329.99	0.6235	0.6485	1.0102	1.0553
329.85	0.6970	0.7155	1.0041	1.0689
329.72	0.7698	0.7830	1.0014	1.0802
329.64	0.8240	0.8345	1.0012	1.0819
329.54	0.8950	0.9016	1.0009	1.0838
329.47	0.9489	0.9523	1.0006	1.0834
329.41	1.0000	1.0000	1.0000	—
均三甲苯(1)-邻甲乙苯(3)
329.27	0.0000	0.0000	—	1.0000
329.28	0.0557	0.0554	1.0000	1.0000
329.29	0.1108	0.1104	1.0000	1.0000
329.29	0.1497	0.1493	1.0000	1.0000
329.30	0.2009	0.2002	1.0000	1.0000
329.31	0.2689	0.2680	1.0000	1.0000
329.31	0.3054	0.3044	1.0000	1.0000
329.32	0.3440	0.3425	1.0000	1.0000
329.33	0.4197	0.4181	1.0000	1.0000
329.34	0.4776	0.4758	1.0000	1.0000
329.35	0.5842	0.5825	1.0000	1.0000
329.37	0.6935	0.6924	1.0000	1.0000
329.38	0.7743	0.7737	1.0000	1.0000
329.39	0.8349	0.8345	1.0000	1.0000
329.40	0.8893	0.8890	1.0000	1.0000
329.40	0.9283	0.9280	1.0000	1.0000
329.41	1.0000	1.0000	1.0000	—

Table 2 Vapor-liquid equilibria data at 2 kPa

T/K	$x_{1}$ ^①	$y_{1}$ ^②	$γ_{1}$	$γ_{2}$
均三甲苯(1)-偏三甲苯(2)
332.43	0.0000	0.0000	—	1.0000
332.05	0.0598	0.0759	1.1120	1.0016
331.79	0.1061	0.1329	1.1117	1.0014
331.52	0.1509	0.1875	1.1177	1.0013
331.32	0.1980	0.2404	1.1031	1.0011
331.05	0.2601	0.3076	1.0891	1.0026
330.88	0.3051	0.3547	1.0798	1.0035
330.67	0.3615	0.4096	1.0635	1.0099
330.53	0.4042	0.4507	1.0539	1.0140
330.42	0.4451	0.4872	1.0403	1.0221
330.20	0.5276	0.5623	1.0242	1.0362
329.99	0.6235	0.6485	1.0102	1.0553
329.85	0.6970	0.7155	1.0041	1.0689
329.72	0.7698	0.7830	1.0014	1.0802
329.64	0.8240	0.8345	1.0012	1.0819
329.54	0.8950	0.9016	1.0009	1.0838
329.47	0.9489	0.9523	1.0006	1.0834
329.41	1.0000	1.0000	1.0000	—
均三甲苯(1)-邻甲乙苯(3)
329.27	0.0000	0.0000	—	1.0000
329.28	0.0557	0.0554	1.0000	1.0000
329.29	0.1108	0.1104	1.0000	1.0000
329.29	0.1497	0.1493	1.0000	1.0000
329.30	0.2009	0.2002	1.0000	1.0000
329.31	0.2689	0.2680	1.0000	1.0000
329.31	0.3054	0.3044	1.0000	1.0000
329.32	0.3440	0.3425	1.0000	1.0000
329.33	0.4197	0.4181	1.0000	1.0000
329.34	0.4776	0.4758	1.0000	1.0000
329.35	0.5842	0.5825	1.0000	1.0000
329.37	0.6935	0.6924	1.0000	1.0000
329.38	0.7743	0.7737	1.0000	1.0000
329.39	0.8349	0.8345	1.0000	1.0000
329.40	0.8893	0.8890	1.0000	1.0000
329.40	0.9283	0.9280	1.0000	1.0000
329.41	1.0000	1.0000	1.0000	—

Fig.2 lnγ1γ2-x1 for 1,3,5-trimethylbenzene (1) - 1,2,4-trimethylbenzene (2)

Fig.3 lnγ1γ3-x1 for 1,3,5-trimethylbenzene (1) - 2-ethyltoluene (3)

Table 3 Activity coefficient parameters correlation and regression deviation at 2 kPa

模型	模型参数					AAD
模型	$a_{i j}$	$a_{j i}$	$b_{i j}$	$b_{j i}$	$c_{i j}$	$\|? T\|$ /K	$\|? p\|$ /kPa	$\|? x_{1}\|$	$\|? y_{1}\|$
均三甲苯(1)-偏三甲苯(2)
NRTL	6.6444	-1.8407	-2160.15	613.62	0.3	0.020	4.73×10^-7	2.15×10^-5	0.0025
UNIQUAC	-3.8399	2.6059	1254.69	-856.9	—	0.020	4.76×10^-7	2.14×10^-5	0.0025
均三甲苯(1)-邻甲乙苯(3)
NRTL	-7.4030	7.7726	2411.95	-2533.05	0.3	0.003	1.04×10^-9	1.43×10^-5	0.0064
UNIQUAC	0.0884	-0.0830	-35.97	34.13	—	0.003	1.03×10^-9	1.43×10^-5	0.0064

Table 3 Activity coefficient parameters correlation and regression deviation at 2 kPa

模型	模型参数					AAD
模型	$a_{i j}$	$a_{j i}$	$b_{i j}$	$b_{j i}$	$c_{i j}$	$\|? T\|$ /K	$\|? p\|$ /kPa	$\|? x_{1}\|$	$\|? y_{1}\|$
均三甲苯(1)-偏三甲苯(2)
NRTL	6.6444	-1.8407	-2160.15	613.62	0.3	0.020	4.73×10^-7	2.15×10^-5	0.0025
UNIQUAC	-3.8399	2.6059	1254.69	-856.9	—	0.020	4.76×10^-7	2.14×10^-5	0.0025
均三甲苯(1)-邻甲乙苯(3)
NRTL	-7.4030	7.7726	2411.95	-2533.05	0.3	0.003	1.04×10^-9	1.43×10^-5	0.0064
UNIQUAC	0.0884	-0.0830	-35.97	34.13	—	0.003	1.03×10^-9	1.43×10^-5	0.0064

Fig.4 Comparison of the VLE data from experimental data and regression data by NRTL for the system of 1,3,5-trimethylbenzene (1) - 1,2,4-trimethylbenzene (2) at 2 kPa

Fig.5 Comparison of the VLE data from experimental data and regression data by NRTL for the system of 1,3,5-trimethylbenzene (1) - 2-ethyltoluene (3) at 2 kPa

Fig.6 Diagram of distillation

Table 4 Parameters of distillation columns

参数	单塔减压精馏	双塔连续减压精馏
参数	T11	T21	T22
塔顶压力/kPa	2	2	2
塔板数n	120	50	50
回流比R	12	7	8
塔顶采出率	0.70	0.65	0.60
再沸器热负荷Q_R/kW	97.4296	56.8002	37.1880

References 31

1	唐卫东. 连续重整重芳烃综合利用工艺的探讨[J]. 石油炼制与化工, 2006, 37(11): 35-39.
	Tang W D. Perspectives on comprehensive utilization of heavy aromatics from CCR unit[J]. Petroleum Processing and Petrochemicals, 2006, 37(11): 35-39.
2	高丽霞, 刘植昌, 高金森, 等. 离子液体中苯与C₉芳烃烷基转移反应[J]. 化学反应工程与工艺, 2005, 21(3): 274-279.
	Gao L X, Liu Z C, Gao J S, et al. Transalkylation of C₉ aromatic hydrocarbon and benzene in ionic liquids[J]. Chemical Reaction Engineering and Technology, 2005, 21(3): 274-279.
3	陈伴生. 重整C₉芳烃的综合利用: 利用烷基化分离方法提纯均三甲苯[D]. 南京: 东南大学, 2006: 5-6.
	Chen B S. Complete utilization of C₉ aromatics mixture—purify mesitylene by alkylation distillation[D]. Nanjing: Southeast University, 2006: 5-6.
4	冯海强, 傅吉全. 采用分离集成技术从碳九芳烃中提取均三甲苯[J]. 化工进展, 2011, 30(3): 478-482.
	Feng H Q, Fu J Q. Extraction of mesitylene from C₉ arene by integrated separation technology[J]. Chemical Industry and Engineering Progress, 2011, 30(3): 478-482.
5	李伟宏, 任海伦, 张敬, 等. 一种差压热耦合萃取精馏精制均三甲苯的方法: 104591952A[P]. 2015-05-06.
	Li W H, Ren H L, Zhang J, et al. Method for refining mesitylene by virtue of differential pressure thermal coupling rectification: 104591952A[P]. 2015-05-06.
6	冯海强, 傅吉全. 萃取精馏分离均三甲苯的实验和模拟[J]. 石油化工, 2011, 40(2): 157-160.
	Feng H Q, Fu J Q. Experiment and simulation of separating mesitylene by extractive distillation[J]. Petrochemical Technology, 2011, 40(2): 157-160.
7	徐广宇, 徐建兵, 廖丽萍, 等. 2, 4, 6-三甲基苯甲酸的合成[J]. 化工进展, 2007, 26(3): 430-432.
	Xu G Y, Xu J B, Liao L P, et al. Synthesis of 2, 4, 6-trimethylbenzoic acid[J]. Chemical Industry and Engineering Progress, 2007, 26(3): 430-432.
8	项纯, 林光伟, 杨志萍, 等. 一种液相氧化法制备均苯三甲酸/偏苯三甲酸的方法: 110143862A[P]. 2019-08-20.
	Xiang C, Lin G W, Yang Z P, et al. Liquid phase oxidation method for preparing trimesic acid/trimellitic acid: 110143862A[P]. 2019-08-20.
9	曹正国, 李江华, 王福, 等. 均三甲苯低温液相连续氧化生产均苯三甲酸的方法: 110642699A[P]. 2020-01-03.
	Cao Z G, Li J H, Wang F, et al. Method for producing trimesic acid through low-temperature liquid-phase continuous oxidation of mesitylene: 110642699A[P]. 2020-01-03.
10	赵开鹏, 韩松. 重整C₉芳烃的综合利用[J]. 石油化工, 1999, 28(7): 57-67.
	Zhao K P, Han S. Comprehensive utilization of reformed C₉ aromatics[J]. Petrochemical Technology, 1999, 28(7): 57-67.
11	王明. 偏三甲苯异构化制取均三甲苯研究[D]. 天津: 天津大学, 2014: 2-4.
	Wang M. Research on the production of 1, 3, 5-trimethylbenzene by the isomerization of 1, 2, 4-trimethylbenzene[D]. Tianjin: Tianjin University, 2014: 2-4.
12	匡华. C₉芳烃中均三甲苯与邻甲乙苯的分离研究[J]. 化学反应工程与工艺, 2004, 20(2): 184-187.
	Kuang H. Separation of mesitylene and o-methylethylbenzene from C₉ aromatic[J]. Chemical Reaction Engineering and Technology, 2004, 20(2): 184-187.
13	Zhu M L, Sun J S, Tian Y F, et al. Design and application of a highly efficient separation technology for C₉ arenes[J]. Asia-Pacific Journal of Chemical Engineering, 2007, 2(4): 278-281.
14	郭乃龄, 郑金璇, 张杏芳, 等. 均三甲苯-偏三甲苯-连三甲苯汽液平衡的研究[J]. 化学工程, 1983, 11(4): 27-32.
	Guo N L, Zheng J X, Zhang X F, et al. Research on vapor-liquid equilibrium of 1, 3, 5-trimethylbenzene-1, 2, 4-trimethylbenze-1, 2, 3-trimethylbenzene[J]. Chemical Engineering (China), 1983, 11(4): 27-32.
15	Fu J Q, Liu X J, Fu D. Study on vapor liquid equilibrium for C₉ separation by azeotropic distillation[J]. China Petroleum Processing & Petrochemical Technology, 2012, 14(1): 80-86.
16	肖文, 周大军. 重整C₉芳烃中提取高纯度均三甲苯的实验研究[J]. 石油学报(石油加工), 2010, 26(S1): 93-97.
	Xiao W, Zhou D J. Experimental study on manufacturing high purity mesitylene from C₉ arene cut of reforming[J]. Acta Petrolei Sinica (Petroleum Processing Section), 2010, 26(S1): 93-97.
17	程能林. 溶剂手册[M]. 4版. 北京: 化学工业出版社, 2007: 216-218.
	Cheng N L. Handbook of Solvents[M]. 4th ed. Beijing: Chemical Industry Press, 2007: 216-218.
18	Yaws C L, Yang H C. To estimate vapor pressure easily[J]. Hydrocarbon Processing, 1989, 68(10): 65-66.
19	Xu J M, Li S T, Zeng Z X, et al. Isobaric vapor-liquid equilibrium for binary system of isoamyl DL-lactate and isoamyl alcohol at 25.0, 50.0, and 101.3 kPa[J]. Journal of Chemical & Engineering Data, 2020, 65(1): 81-87.
20	徐勉, 吴亮衡, 张杰. 2,4-TDI/共沸剂二元体系的汽液平衡数据的测定及共沸组成分析[J]. 化工学报, 2016, 67(5): 1673-1679.
	Xu M, Wu L H, Zhang J. Measurement of vapor-liquid equilibrium data and azeotropic analysis for 2, 4-toluene diisocyanate + entrainer[J]. CIESC Journal, 2016, 67(5): 1673-1679.
21	Song Y Z, Wang Y, Zhang X B, et al. Isobaric vapor-liquid equilibrium measurements of binary systems of dimethyl carbonate with dimethyl sulfoxide, anisole, and diethyl oxalate at 101.3 kPa[J]. Journal of Chemical & Engineering Data, 2021, 66(3): 1367-1375.
22	宋卓栋, 张作毅, 潘学龙, 等. 聚甲醛二甲醚体系汽液平衡数据的测定与关联[J]. 化工学报, 2020, 71: 1-6.
	Song Z D, Zhang Z Y, Pan X L, et al. Determination and correlation of vapor-liquid equilibrium for polyoxymethylene dimethyl ether system[J]. CIESC Journal, 2020, 71: 1-6.
23	周峰, 陈长旭, 许春建. 乙酸异戊酯+异戊醇和乙酸异戊酯+正己醇体系汽液平衡[J]. 化工学报, 2017, 68(2): 560-566.
	Zhou F, Chen C X, Xu C J. Isobaric vapor-liquid equilibrium for binary systems of isoamyl acetate + isoamyl alcohol and isoamyl acetate + n-hexanol at 50.00 and 101.33 kPa[J]. CIESC Journal, 2017, 68(2): 560-566.
24	Herington E F G. A thermodynamic test for the internal consistency of experimental data on volatility ratios[J]. Nature, 1947, 160(4070): 610-611.
25	Zhong Y, Wu Y Y, Zhu J W, et al. Thermodynamics in separation for the ternary system 1, 2-ethanediol + 1, 2-propanediol + 2, 3-butanediol[J]. Industrial & Engineering Chemistry Research, 2014, 53(30): 12143-12148.
26	谈金辉, 徐菊美, 施云海. 常压下乙醇-水-醋酸钾系统汽液平衡数据的测定与关联[J]. 化工学报, 2020, 71(8): 3444-3451.
	Tan J H, Xu J M, Shi Y H. Measurement and correlation of vapor-liquid equilibria for ethanol-water-potassium acetate system under atmospheric pressure[J]. CIESC Journal, 2020, 71(8): 3444-3451.
27	Yang S K, Zhang Y P, Wang X J, et al. Isobaric VLE data for 1-methyl-3-ethylbenzene or 1-methyl-4-ethylbenzene + 1, 2, 4-trimethylbenzene at 20 kPa[J]. The Journal of Chemical Thermodynamics, 2013, 60: 52-56.
28	Yang S K, Zhang Y P, Wang X J, et al. Isobaric vapor-liquid equilibrium data for the system of 1-methyl-2-ethylbenzene + 1, 2, 4-trimethylbenzene at 10 kPa[J]. Journal of Chemical & Engineering Data, 2013, 58(2): 398-401.
29	张卫江, 付强, 李汝贤, 等. 异丁烯烷基化法分离提纯均三甲苯[J]. 天津大学学报, 2005, 38(6): 518-522.
	Zhang W J, Fu Q, Li R X, et al. Production of high-purity 1, 3, 5-trimethyl benzene by isobutene alkylation[J]. Journal of Tianjin University, 2005, 38(6): 518-522.
30	张卫江, 张雪梅, 韩振为, 等. 偏三甲苯生产均三甲苯工艺[J]. 化工学报, 2002, 53(3): 274-279.
	Zhang W J, Zhang X M, Han Z W, et al. Technology of production of 1, 3, 5-trimethylbenzene from 1, 2, 4-trimethylbenzene[J]. CIESC Journal, 2002, 53(3): 274-279.
31	任慧勇, 杨卫兰, 张蓓. 中国重整C₉⁺重芳烃分离和利用机会分析[J]. 现代化工, 2020, 40(8): 11-14, 20.
	Ren H Y, Yang W L, Zhang P. Opportunities for separation and utilization of C₉⁺ heavy aromatics from reformation in China[J]. Modern Chemical Industry, 2020, 40(8): 11-14, 20.

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