CN102304012A - Triisopropylbenzene transposition alkylation technique - Google Patents
Triisopropylbenzene transposition alkylation technique Download PDFInfo
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- CN102304012A CN102304012A CN201110191312A CN201110191312A CN102304012A CN 102304012 A CN102304012 A CN 102304012A CN 201110191312 A CN201110191312 A CN 201110191312A CN 201110191312 A CN201110191312 A CN 201110191312A CN 102304012 A CN102304012 A CN 102304012A
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- isopropyl benzene
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- triisopropylbenzene
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Abstract
The invention relates to a triisopropylbenzene transposition alkylation technique which comrises steps as follows: benzene is sent out by an alkylation reactor benzene feed pump (106-J/JA), and triisopropylbenzene is sent out by a triisopropylbenzene pump (153-J/JA) through a side line tank (152-F) from a diisopropylbenzene refining tower (104-E) side line; the two streams of materials are respectively subjected to flow regulation, mixed at the feed mixer (110-LA), preheated by a feed preheater (121-C) and enters a triisopropylbenzene transposition alkylation reactor (103-D) from the bottom; and the triisopropylbenzene and diisopropylbenzene are converted into isopropylbenzene in the triisopropylbenzene transposition alkylation reactor (103-D), wherein for the triisopropylbenzene transposition alkylation reactor (103-D), the raw material dry benzene comes from an isopropylbenzene unit circulation tower (133-E) side line of a phenol acetone device, the polyisopropylbenzene material containing triisopropylbenzene comes from a triisopropylbenzene side line of a diisopropylbenzene refining tower (104-E), and the mixed liquid after reaction enters the isopropylbenzene unit circulation tower (133-E). After adding the triisopropylbenzene transposition reactor, the ratio of benzene to olefine fed to the alkylation reactor is reduced to 3.0, and FTH-2 can completely treat triisopropylbenzene generated by the device. Besides, the alkylation unit operates stably.
Description
Technical field
The present invention relates to the commercial run of polyalkylbenzene transfering alkylation process, especially the commercial run of tri-isopropyl benzene transfering alkylation process.
Background technology
In benzene and propylene synthesizing iso-propylbenzene technology, it is inevitable that the consecutive side reaction generates polyisopropylbenzene.Thereby the transalkylation of polyisopropylbenzene is the important step of benzene and propylene hydrocarbonylation synthesizing iso-propylbenzene technology.In recent years, because the integral level of molecular sieve liquid phase hydrocarbonylation catalyzer and technology has had large increase, the level of polyisopropylbenzene transalkylation catalyst is also progressively increasing the influence of whole synthesizing iso-propylbenzene process technology economic index.Especially deep day by day along with energy-saving and cost-reducing work, the research and development of polyisopropylbenzene transalkylation catalyst have caused people's attention.Present domestic imported technology has UOP, Mobil, the YSPC technology that the research and development of Yan Hua company are arranged of independent research, and Oil of Shanghai Petrochemical Company research institute has also done many work in this respect, develops the MP-02 catalyzer.But it all is that diisopropylbenzene(DIPB) is purified to more than 95% that the polyisopropylbenzene in the existing technology transforms, and then diisopropylbenzene(DIPB) is changed into isopropyl benzene, outside tri-isopropyl benzene all extremely installs with the tar extraction of device by-product.Have a strong impact on the lifting of isopropyl benzene device technique economic target.
Summary of the invention
The objective of the invention is to the former tri-isopropyl benzene that is used as waste material is extracted from hydrocarbonylation tar, produce isopropyl benzene, reduce the device material consumption with the method for transfering alkylation.
Industry application method thereof of the present invention:
The nucleus equipment of industrial application device is tri-isopropyl benzene transposition alkylation reaction device 103-D; The dried benzene of raw material is from phenol-acetone device isopropyl benzene unit recycle column 133-E side line; Contain the tri-isopropyl benzene side line of the polyisopropylbenzene material of tri-isopropyl benzene from diisopropylbenzene(DIPB) treating tower 104-E, reacted mixed solution gets into isopropyl benzene unit recycle column 133-E.Benzene is seen off by alkylation reaction device benzene charge pump 106-J/JA; Tri-isopropyl benzene is seen off with tri-isopropyl benzene pump 153-J/JA through its side line jar (152-F) from the 104-E side line; Two strands of materials are respectively through mixing in entry mixers 110-LA after the Flow-rate adjustment, after feed preheater 121-C preheating, get into 103-D from the bottom.Change into isopropyl benzene at this tri-isopropyl benzene, diisopropylbenzene(DIPB).Schema is seen Fig. 1.
Processing parameter:
Industrial performance test device related process parameter such as following table behind condition optimizing:
Table 1: industrial performance test device related process parameter
Annotate: air speed is meant the quality (or volume) of passing through the reactant of unit mass (or volume) catalyzer in the unit time;
Weight percent in the table 1 is that component in the 104-E side line is based on the ratio of 104-E side line all components gross weight.
This process application is behind swallowization chemical industry three factory's biphenol devices, and the result shows that temperature of reaction is bigger to the influence of polyisopropylbenzene transformation efficiency, reduces with temperature, and the tri-isopropyl benzene transformation efficiency reduces.Selecting FTH-2 catalyzer tri-isopropyl benzene average conversion in the time of 180-190 ℃ for use is 86%, and transformation efficiency varies with temperature more obvious; The tri-isopropyl benzene average conversion is 75% in the time of 170-180 ℃, and transformation efficiency is relatively stable; The tri-isopropyl benzene average conversion is about 60% in the time of 160-170 ℃, varies with temperature fluctuation.Simultaneously, in the different temperature section, diisopropylbenzene(DIPB) per pass conversion overwhelming majority data are greater than 90%;
At temperature of reaction 160-165 ℃, reaction pressure 2.0Mpa, air speed 1.70/h; Benzene/polyisopropylbenzene weight ratio 4.0-6.0; Under the condition of diisopropylbenzene(DIPB)/tri-isopropyl benzene weight ratio 2.0-4.0, the per pass conversion of FTH-2 p-Diisopropylbenzene is more than 91%, to the transformation efficiency of tri-isopropyl benzene more than 57%.
Industrial performance test is the result show, behind the increase tri-isopropyl benzene translocation reaction device 103-D, after alkylation reaction device benzene feed alkene ratio reduced to 3.0, FTH-2 is the tri-isopropyl benzene of treatment unit generation fully; And the hydrocarbonylation unit is stable.
Wherein, the FTH-2 catalyzer is being that (its specification is following: silica alumina ratio is 9-12 to raw material through the USY molecular sieve of hydrothermal treatment consists; Na
2O ≦ 0.15%; Lattice constant is 2.448-2.453; Degree of crystallinity is greater than 95%; Butt is greater than 75%), carry out the modification forming preparation, it can be available from Tieling De Shijie chemical industry company limited.
Description of drawings
Fig. 1 is the alkylating process flow sheet of tri-isopropyl benzene transposition that obtains from diisopropylbenzene(DIPB) tower side line.
Fig. 2 is the alkylating process flow sheet of tri-isopropyl benzene transposition that obtains from diisopropylbenzene(DIPB) Tata still.
Embodiment
Embodiment 1:
The tri-isopropyl benzene of using in the technology obtains from diisopropylbenzene(DIPB) tower side line, mixes the back with benzene and sends into tri-isopropyl benzene translocation reaction device 103-D reaction, top discharging from the bottom.150 ~ 200 ℃ of temperature of reaction, pressure 1.5 ~ 3MPa, flow process is as shown in Figure 1.
Embodiment 2:
The tri-isopropyl benzene of using in the technology obtains from diisopropylbenzene(DIPB) Tata still.The material that is rich in tri-isopropyl benzene by diisopropylbenzene(DIPB) Tata still is seen off by 113J/JA; A part is delivered to the hydrocarbon tar storage tank 143-F of isopropyl benzene system after water cooler 142-C cooling; A part is mixed the back and is sent into tri-isopropyl benzene translocation reaction device 103-D reaction, top discharging from the bottom with benzene.150 ~ 200 ℃ of temperature of reaction, pressure 1.5 ~ 3MPa, flow process is as shown in Figure 2.
Claims (10)
1. tri-isopropyl benzene transposition alkylation process; It is characterized in that: benzene is seen off by alkylation reaction device benzene charge pump (106-J/JA); Tri-isopropyl benzene is seen off with tri-isopropyl benzene pump (153-J/JA) through its side line jar (152-F) from diisopropylbenzene(DIPB) treating tower (104-E) side line; Two strands of materials are respectively through mixing in entry mixers (110-LA) after the Flow-rate adjustment; After feed preheater (121-C) preheating, get into tri-isopropyl benzene transposition alkylation reaction device (103-D), change into isopropyl benzene at this tri-isopropyl benzene, diisopropylbenzene(DIPB) from the bottom; Wherein, For tri-isopropyl benzene transposition alkylation reaction device (103-D); The dried benzene of raw material is from phenol-acetone device isopropyl benzene unit recycle column (133-E) side line; Contain the tri-isopropyl benzene side line of the polyisopropylbenzene material of tri-isopropyl benzene from diisopropylbenzene(DIPB) treating tower (104-E), reacted mixed solution gets into isopropyl benzene unit recycle column (133-E).
2. according to the tri-isopropyl benzene transposition alkylation process of claim 1; Wherein in tri-isopropyl benzene transposition alkylation reaction device (103-D); The benzene charging is 1.5～3.0t/h; The tri-isopropyl benzene charging is 350～850kg/h; Preheating temperature is 160～165 ℃; Top hole pressure is 1.9MPa, and benzene/polyisopropylbenzene feed weight is than being (5～8): 1, and air speed is 1.7h
-1, loaded catalyst is 1.5t.
3. according to the tri-isopropyl benzene transposition alkylation process of claim 2, wherein benzene/polyisopropylbenzene feed weight is than being (4～6): 1.
4. according to the tri-isopropyl benzene transposition alkylation process of one of claim 1 to 3; Wherein diisopropylbenzene(DIPB) treating tower (104-E) side line extraction heavy constituent content is 0.6～1wt%; Tri-isopropyl benzene content is 20～30wt%; Diisopropylbenzene(DIPB) content is 70～80wt%, based on diisopropylbenzene(DIPB) treating tower (104-E) side line all components gross weight meter.
5. according to the tri-isopropyl benzene transposition alkylation process of claim 4, wherein the weight ratio of diisopropylbenzene(DIPB)/tri-isopropyl benzene is (2～4): 1.
6. according to the tri-isopropyl benzene transposition alkylation process of claim 4, wherein said catalyzer is FTH-2.
7. according to the tri-isopropyl benzene transposition alkylation process of claim 4, wherein the temperature of reaction in tri-isopropyl benzene transposition alkylation reaction device (103-D) is 150 ~ 200 ℃, reaction pressure 1.5 ~ 3MPa.
8. according to the tri-isopropyl benzene transposition alkylation process of claim 7, wherein reaction pressure is 2.0MPa.
9. according to the tri-isopropyl benzene transposition alkylation process of claim 7, wherein temperature of reaction is 180-190 ℃.
10. according to the tri-isopropyl benzene transposition alkylation process of claim 7, wherein temperature of reaction is 170-180 ℃.
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| CN 201110191312 CN102304012B (en) | 2011-07-08 | 2011-07-08 | Triisopropylbenzene transposition alkylation technique |
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| WO2010135062A2 (en) * | 2009-05-18 | 2010-11-25 | Uop Llc | Aromatic alkylation process with reduced byproduct formation |
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| WO2010135062A2 (en) * | 2009-05-18 | 2010-11-25 | Uop Llc | Aromatic alkylation process with reduced byproduct formation |
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| 代成娜: "苯与丙烯合成异丙苯工艺流程优化", 《现代化工》 * |
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