GB1171865A - Continuous Process for the Preparation of p-Xylene. - Google Patents
Continuous Process for the Preparation of p-Xylene.Info
- Publication number
- GB1171865A GB1171865A GB5393/68A GB539368A GB1171865A GB 1171865 A GB1171865 A GB 1171865A GB 5393/68 A GB5393/68 A GB 5393/68A GB 539368 A GB539368 A GB 539368A GB 1171865 A GB1171865 A GB 1171865A
- Authority
- GB
- United Kingdom
- Prior art keywords
- isomerization
- xylene
- xylenes
- product mixture
- recycled
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C15/00—Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic parts
- C07C15/02—Monocyclic hydrocarbons
- C07C15/067—C8H10 hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
- C07C5/22—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by isomerisation
- C07C5/27—Rearrangement of carbon atoms in the hydrocarbon skeleton
- C07C5/2702—Catalytic processes not covered by C07C5/2732 - C07C5/31; Catalytic processes covered by both C07C5/2732 and C07C5/277 simultaneously
- C07C5/2724—Catalytic processes not covered by C07C5/2732 - C07C5/31; Catalytic processes covered by both C07C5/2732 and C07C5/277 simultaneously with metals
-
- 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
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
1,171,865. Isomerizing xylenes. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. 17 Oct., 1968 [19 Oct., 1967; 2 Feb., 1968], Nos. 47587/67 and 5393/68. Heading C5E. In a one-stage continuous isomerization process in which a mixture of two or more C 8 aromatic hydrocarbons comprising ethylbenzene as one component is contacted with hydrogen in an isomerization section in the presence of a catalyst comprising an acidic refractory oxide and a hydrogenating/dehydrogenating metal component, and in which the product mixture is subsequently fractionated, the isomerization is conducted under such conditions of temperature and hydrogen partial pressure that the product mixture before fractionation contains 1-50 wt. per cent of C 8 naphthenes, at least 10% of which are recycled, after recovery, direct to the isomerization. Decrease in catalyst activity may be counteracted by increasing both temperature and hydrogen partial pressure in such a way that the product mixture maintains the desired C 8 naphthene content. Individual xylenes may be recovered as desired: o-xylene by appropriate fractionation, m-xylene by extraction with HF/BF 3 or HF/PF 5 , and p-xylene by crystallization. Unwanted xylenes may be recycled to isomerization.
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5393/68A GB1171865A (en) | 1967-10-19 | 1967-10-19 | Continuous Process for the Preparation of p-Xylene. |
| SE14035/68A SE352332B (en) | 1967-10-19 | 1968-10-17 | |
| DE1803694A DE1803694C3 (en) | 1967-10-19 | 1968-10-17 | Process for the continuous isomerization of aromatic C8 hydrocarbons for the production of p-xylene |
| BE722433D BE722433A (en) | 1967-10-19 | 1968-10-17 | |
| CA032,810A CA986144A (en) | 1967-10-19 | 1968-10-17 | Continuous process for the preparation of p-xylene |
| NL6814836.A NL162049C (en) | 1967-10-19 | 1968-10-17 | PROCESS FOR CONTINUOUS ISOMERIZATION IN A STAGE OF A MIXTURE OF TWO OR MORE C8 AROMATIC HYDROCARBONS. |
| FR1588697D FR1588697A (en) | 1967-10-19 | 1968-10-17 | |
| JP43075348A JPS4947734B1 (en) | 1967-10-19 | 1968-10-17 | |
| ES359257A ES359257A1 (en) | 1967-10-19 | 1968-10-17 | Continuous Process for the Preparation of p-Xylene. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5393/68A GB1171865A (en) | 1967-10-19 | 1967-10-19 | Continuous Process for the Preparation of p-Xylene. |
| GB4758767 | 1967-10-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1171865A true GB1171865A (en) | 1969-11-26 |
Family
ID=26239857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5393/68A Expired GB1171865A (en) | 1967-10-19 | 1967-10-19 | Continuous Process for the Preparation of p-Xylene. |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS4947734B1 (en) |
| BE (1) | BE722433A (en) |
| CA (1) | CA986144A (en) |
| DE (1) | DE1803694C3 (en) |
| ES (1) | ES359257A1 (en) |
| FR (1) | FR1588697A (en) |
| GB (1) | GB1171865A (en) |
| NL (1) | NL162049C (en) |
| SE (1) | SE352332B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1255459A (en) * | 1970-05-26 | 1971-12-01 | Shell Int Research | Process for the isomerization of alkylaromatic hydrocarbons |
| US4139571A (en) * | 1977-09-14 | 1979-02-13 | Atlantic Richfield Company | C8 Alkyl aromatic hydrocarbon isomerization by recycling benzene and toluene |
-
1967
- 1967-10-19 GB GB5393/68A patent/GB1171865A/en not_active Expired
-
1968
- 1968-10-17 JP JP43075348A patent/JPS4947734B1/ja active Pending
- 1968-10-17 ES ES359257A patent/ES359257A1/en not_active Expired
- 1968-10-17 DE DE1803694A patent/DE1803694C3/en not_active Expired
- 1968-10-17 CA CA032,810A patent/CA986144A/en not_active Expired
- 1968-10-17 FR FR1588697D patent/FR1588697A/fr not_active Expired
- 1968-10-17 NL NL6814836.A patent/NL162049C/en not_active IP Right Cessation
- 1968-10-17 BE BE722433D patent/BE722433A/xx not_active IP Right Cessation
- 1968-10-17 SE SE14035/68A patent/SE352332B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CA986144A (en) | 1976-03-23 |
| DE1803694B2 (en) | 1979-05-03 |
| DE1803694C3 (en) | 1979-12-20 |
| ES359257A1 (en) | 1970-06-01 |
| SE352332B (en) | 1972-12-27 |
| DE1803694A1 (en) | 1969-06-26 |
| FR1588697A (en) | 1970-04-17 |
| BE722433A (en) | 1969-04-17 |
| JPS4947734B1 (en) | 1974-12-17 |
| NL162049C (en) | 1980-04-15 |
| NL6814836A (en) | 1969-04-22 |
| NL162049B (en) | 1979-11-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE20 | Patent expired after termination of 20 years |