GB890760A - Separation of isobutene from other hydrocarbons - Google Patents
Separation of isobutene from other hydrocarbonsInfo
- Publication number
- GB890760A GB890760A GB4321759A GB4321759A GB890760A GB 890760 A GB890760 A GB 890760A GB 4321759 A GB4321759 A GB 4321759A GB 4321759 A GB4321759 A GB 4321759A GB 890760 A GB890760 A GB 890760A
- Authority
- GB
- United Kingdom
- Prior art keywords
- isobutene
- acid
- hydrocarbons
- heating
- absorption
- 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
- C07C7/00—Purification; Separation; Use of additives
- C07C7/148—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound
- C07C7/17—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound with acids or sulfur oxides
- C07C7/171—Sulfuric acid or oleum
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (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
Isobutene is separated from a C4 hydrocarbon mixture by selective absorption in a mixture containing acetic acid and 0.5%-30% by weight of sulphuric acid, separating the non-absorbed hydrocarbons, recovering the isobutene by heating the acid phase to 50 DEG C.-120 DEG C. and recycling the acid to the absorption. Absorption may be effected at 5 DEG C.-85 DEG C. with the hydrocarbons in liquid or gaseous phase, e.g. passing the hydrocarbons countercurrent to the acid. Cooling is necessary as an exothermic reaction occurs. Recovery of the isobutene may be effected in one stage but a purer product is obtained by first neutralising the sulphuric acid with an aqueous base, e.g. an alkali or alkaline earth metal hydroxide or acetate or with a cation exchange resin, before reducing the pressure if this is necessary, heating to 50 DEG C.-120 DEG C. to expel hydrocarbons other than isobutene, and filtering off the sulphate formed, then adding further sulphuric acid, heating to recover the isobutene and recycling the acid mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4321759A GB890760A (en) | 1959-12-19 | 1959-12-19 | Separation of isobutene from other hydrocarbons |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4321759A GB890760A (en) | 1959-12-19 | 1959-12-19 | Separation of isobutene from other hydrocarbons |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB890760A true GB890760A (en) | 1962-03-07 |
Family
ID=10427779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4321759A Expired GB890760A (en) | 1959-12-19 | 1959-12-19 | Separation of isobutene from other hydrocarbons |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB890760A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104418688A (en) * | 2013-08-19 | 2015-03-18 | 湖南长岭石化科技开发有限公司 | Method for separating and purifying isobutylene from mixed C4 |
-
1959
- 1959-12-19 GB GB4321759A patent/GB890760A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104418688A (en) * | 2013-08-19 | 2015-03-18 | 湖南长岭石化科技开发有限公司 | Method for separating and purifying isobutylene from mixed C4 |
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