GB625570A - - Google Patents
Info
- Publication number
- GB625570A GB625570A GB625570DA GB625570A GB 625570 A GB625570 A GB 625570A GB 625570D A GB625570D A GB 625570DA GB 625570 A GB625570 A GB 625570A
- Authority
- GB
- United Kingdom
- Prior art keywords
- xylene
- xylenes
- cooled
- fraction
- overhead
- 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.)
- Active
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
- C07C15/08—Xylenes
-
- 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
- C07C5/2729—Changing the branching point of an open chain or the point of substitution on a ring
- C07C5/2732—Catalytic processes
- C07C5/2735—Catalytic processes with metal oxides
-
- 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
- C07C5/2729—Changing the branching point of an open chain or the point of substitution on a ring
- C07C5/2732—Catalytic processes
- C07C5/274—Catalytic processes with inorganic acids; with salts or anhydrides of acids
- C07C5/2748—Acids of halogen; Salts thereof
-
- 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
- C07C5/2729—Changing the branching point of an open chain or the point of substitution on a ring
- C07C5/2732—Catalytic processes
- C07C5/274—Catalytic processes with inorganic acids; with salts or anhydrides of acids
- C07C5/2748—Acids of halogen; Salts thereof
- C07C5/2751—Metal halides; Complexes thereof with organic compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/005—Processes comprising at least two steps in series
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
625,570. Distilling and crystallizing xylene. ANGLO-IRANIAN OIL CO., Ltd., BIRCH, S. F., FIDLER, F. A., and HARESNAPE, J. N. April 12, 1946, No. 11295. [Class 32] [Also in Group IV (b)] p-Xylene is obtained from an aromatic hydrocarbon mixture derived from coal tar or petroleum and boiling within 135-150‹ C. by separating by fractional distillation and/or low temperature filtration a fraction enriched in p-xylene, and a fraction enriched in o- and/or m-xylene, subjecting at least part of the latter to catalytic isomerization to convert part of the o- and/or m-xylene to p-xylene, and recovering p-xylene by fractional distillation and/or low temperature filtration. The aromatic fraction may be fractionated to give an overhead boiling up to 137‹ or 138‹ C. containing the ethyl benzene, a 138-139.5‹ C. fraction containing p-xylene and a residue of mainly o- and m-xylenes. The intermediate fraction is cooled to 0‹ to - 50‹ C. to crystallize p-xylene, and the residue passed with the o- and m-xylenes to the isomerization. Alternatively, ethyl benzene may be separated, the remaining xylenes cooled to - 40‹ to - 50‹ C. to crystallize p-xylene, and the mother liquors passed to the isomerization or an overhead containing ethyl benzene, p- and m-xylenes, an intermediate cut rich in m-xylene, and a residue containing o-xylene may be separated, the overhead cooled to crystallize p-xylene and the mother liquors fractionated to give ethyl benzene overhead, an intermediate containing m- and p-xylenes, and a residue concentrated in m-xylene, the intermediate cut being cooled to separate pxylene and the mother liquors fed with the first intermediate cut to the isomerization.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB625570A true GB625570A (en) |
Family
ID=1749681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB625570D Active GB625570A (en) |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB625570A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2879313A (en) * | 1953-09-17 | 1959-03-24 | Union Oil Co | Process for converting a xylene feed mixture to para-xylene and styrene |
| US2959626A (en) * | 1957-07-15 | 1960-11-08 | Cosden Petroleum Corp | Process for the production of styrenegrade ethyl benzene |
-
0
- GB GB625570D patent/GB625570A/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2879313A (en) * | 1953-09-17 | 1959-03-24 | Union Oil Co | Process for converting a xylene feed mixture to para-xylene and styrene |
| US2959626A (en) * | 1957-07-15 | 1960-11-08 | Cosden Petroleum Corp | Process for the production of styrenegrade ethyl benzene |
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