CA2022982A1 - Transalkylation process - Google Patents
Transalkylation processInfo
- Publication number
- CA2022982A1 CA2022982A1 CA002022982A CA2022982A CA2022982A1 CA 2022982 A1 CA2022982 A1 CA 2022982A1 CA 002022982 A CA002022982 A CA 002022982A CA 2022982 A CA2022982 A CA 2022982A CA 2022982 A1 CA2022982 A1 CA 2022982A1
- Authority
- CA
- Canada
- Prior art keywords
- alkylation
- fraction
- zone
- transalkylation
- aromatic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/582—Recycling of unreacted starting or intermediate materials
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Alkylation-transalkylation process involving alkylation of an aromatic substrate with a C2-C4 alkylating agent coupled with separation to recover a monoalkylated aromatic product and liquid phase transalkylation of a polyalkylated product. Both the alkylation and transalkylation reactions carried out in the liquid phase over molecular sieve aromatic alkylation and transalkylation catalysts. The output from the alkylation reaction zone is separated to provide a lower boiling fraction comprising the aromatic substrate and a higher boiling fraction comprising a mixture of monoalkylated and polyalkylated aromatics which is separated to the to produce the monoalkylated fraction and a higher boiling polyalkylated fraction.
At least a portion of the polyalkylated fraction including substantially all dialkylated and trialkylated aromatics is supplied, along with the aromatic substrate, to a transalkylation reaction zone operated under liquid phase conditions to cause disproportionation of the polyalkylated fraction to arrive at a disproportionation product having a reduced polyalkylated aromatic content and an enhanced monoalkylated aromatic content which is supplied to the first separation zone.
A benzene feed stock and a C2-C4 alkylating agent are supplied to an alkylation reaction zone containing a molecular sieve alkylation catalyst and which is operated to produce an alkylated product comprising a mixture of monoalkyl and polyalkyl benzenes. The alkylation zone may be operated under liquid phase or vapor phase conditions with the output from the alkylation zone being subjected to separation steps.
The transalkylation reaction zone is operated at an average temperature below the average temperature of the alkylation reaction zone and under conditions to maintain the benzene in the liquid phase.
In the production of ethylbenzene, in which the alkylation reaction takes place over an aromatic alkylation catalyst selected from the group consisting of zeolite beta and zeolite omega, the output from the alkylation reaction zone is supplied to a benzene separation zone. A higher boiling fraction comprising an ethylbenzene polyethylbenzene mixtures is supplied from the benzene separation zone to an ethylbenzene separation zone. This zone is operated to produce a lower boiling product fraction comprising ethylbenzene and a higher boiling fraction comprising polyethylbenzene containing no more than 5 wt. %
ethylbenzene. The polyethylbenzene fraction is supplied along with benzene to a transalkylation reaction zone which preferably contains a transalkylation catalyst selected from the group consisting of zeolite y and zeolite omega.
At least a portion of the polyalkylated fraction including substantially all dialkylated and trialkylated aromatics is supplied, along with the aromatic substrate, to a transalkylation reaction zone operated under liquid phase conditions to cause disproportionation of the polyalkylated fraction to arrive at a disproportionation product having a reduced polyalkylated aromatic content and an enhanced monoalkylated aromatic content which is supplied to the first separation zone.
A benzene feed stock and a C2-C4 alkylating agent are supplied to an alkylation reaction zone containing a molecular sieve alkylation catalyst and which is operated to produce an alkylated product comprising a mixture of monoalkyl and polyalkyl benzenes. The alkylation zone may be operated under liquid phase or vapor phase conditions with the output from the alkylation zone being subjected to separation steps.
The transalkylation reaction zone is operated at an average temperature below the average temperature of the alkylation reaction zone and under conditions to maintain the benzene in the liquid phase.
In the production of ethylbenzene, in which the alkylation reaction takes place over an aromatic alkylation catalyst selected from the group consisting of zeolite beta and zeolite omega, the output from the alkylation reaction zone is supplied to a benzene separation zone. A higher boiling fraction comprising an ethylbenzene polyethylbenzene mixtures is supplied from the benzene separation zone to an ethylbenzene separation zone. This zone is operated to produce a lower boiling product fraction comprising ethylbenzene and a higher boiling fraction comprising polyethylbenzene containing no more than 5 wt. %
ethylbenzene. The polyethylbenzene fraction is supplied along with benzene to a transalkylation reaction zone which preferably contains a transalkylation catalyst selected from the group consisting of zeolite y and zeolite omega.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002022982A CA2022982C (en) | 1990-08-09 | 1990-08-09 | Transalkylation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002022982A CA2022982C (en) | 1990-08-09 | 1990-08-09 | Transalkylation process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2022982A1 true CA2022982A1 (en) | 1992-02-10 |
| CA2022982C CA2022982C (en) | 2001-07-17 |
Family
ID=4145687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002022982A Expired - Lifetime CA2022982C (en) | 1990-08-09 | 1990-08-09 | Transalkylation process |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2022982C (en) |
-
1990
- 1990-08-09 CA CA002022982A patent/CA2022982C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2022982C (en) | 2001-07-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5003119A (en) | Manufacture of alkylbenzenes | |
| US6002057A (en) | Alkylation process using zeolite beta | |
| EP0467007B1 (en) | Transalkylation process | |
| ES2193612T3 (en) | AROMATIC RENTAL PROCEDURE. | |
| CA2309440A1 (en) | Alkylaromatics production | |
| US20030125591A1 (en) | Selective production of meta-diisopropylbenzene | |
| US6057485A (en) | Gas phase alkylation with split load of catalyst | |
| EP0879809B1 (en) | Gas phase alkylation-liquid phase transalkylation process | |
| KR920001786B1 (en) | Manufacture of alkylbenzenes | |
| KR100515883B1 (en) | Thermal Integration in Alkylation / Transalkylation Processes | |
| WO2004033395A3 (en) | Critical phase alkylation process | |
| TW412522B (en) | Gas phase alkylation-liquid transalkylation process | |
| KR100729574B1 (en) | Aromatic conversion process | |
| CA2022982A1 (en) | Transalkylation process | |
| US3766290A (en) | Process for the preparation of ethylbenzene | |
| CA2546119A1 (en) | Aromatics alkylation process | |
| EP0440637A1 (en) | Improved process for the transalkylation of polyalkylbenzenes | |
| JP2001072611A5 (en) | ||
| JP2882542B2 (en) | Transalkylation method | |
| JP3786998B2 (en) | Improved ethylbenzene production process | |
| EP0190057A1 (en) | Process for the alkylation of aromatic hydrocarbons | |
| KR100531066B1 (en) | Control of Diarylalkane By-Product Formation in Alkylation of Aromatics by Olefins Using Zeolite Beta Catalyst | |
| KR920009746A (en) | Aromatic Conversion Methods and Useful Catalysts |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |