GB897584A - A process for extracting isobutylene from mixtures of isobutylene with other c hydrocarbons - Google Patents
A process for extracting isobutylene from mixtures of isobutylene with other c hydrocarbonsInfo
- Publication number
- GB897584A GB897584A GB2839460A GB2839460A GB897584A GB 897584 A GB897584 A GB 897584A GB 2839460 A GB2839460 A GB 2839460A GB 2839460 A GB2839460 A GB 2839460A GB 897584 A GB897584 A GB 897584A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stage
- acid
- isobutylene
- hydrocarbons
- emulsion
- 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)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
<PICT:0897584/IV (b)/1> In the recovery of isobutylene from C4 hydrocarbons by selective extraction with aqueous sulphuric acid to form tertiary butyl alcohol followed by regeneration of isobutylene from the acid solution, the acid used contains less than 2% by weight of non-aqueous impurities and the acid solution, prior to regeneration, is passed to a venting zone maintained at 57 DEG C.-66 DEG C. Using a two stage process, C4 feed is fed via heater or cooler 11 where the temperature is adjusted to 23 DEG C.-35 DEG C., the pressure being 6.9-9.98 atmospheres, and mixed with circulating emulsion from the first stage and sulphuric acid from the second stage already containing some tertiary butyl alcohol. The mixture is pumped via cooler 15 into reactor 14. Most of the emulsion is recycled, the remainder being bled off to settler 16 whence remaining hydrocarbons are removed from the final acid solution. The hydrocarbons pass to the second stage where they are mixed with circulating emulsion and fresh sulphuric acid of 55%-65% by weight strength. The second stage is maintained at 12 DEG C.-35 DEG C. and at a pressure 0.068-2.04 atmospheres higher than the first stage. The mixture is pumped to cooler 30 and reactor 22 whence most of the emulsion is recycled, some being bled off to settler 13 where acid is removed and passed to the first stage and remaining hydrocarbons are removed from the process. Acid solution from settler 16 is heated, preferably by mixing with 10.5 kg./cm.2 steam and passed to venting zone 23 where a defoamant, e.g. a spray of tertiary butyl alcohol, may be added if desired. Here undesired impurities are removed; these may be led to a n-butylene scrubber and then recycled to the first stage of the extraction. Isobutylene is recovered conventionally in tower 25 by heating and diluting, e.g. with steam. The spent acid is reconcentrated, preferably by distillation at 5.08-25.4 cm. mercury pressure and an outlet temperature of 65 DEG C.-93 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2839460A GB897584A (en) | 1960-08-16 | 1960-08-16 | A process for extracting isobutylene from mixtures of isobutylene with other c hydrocarbons |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2839460A GB897584A (en) | 1960-08-16 | 1960-08-16 | A process for extracting isobutylene from mixtures of isobutylene with other c hydrocarbons |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB897584A true GB897584A (en) | 1962-05-30 |
Family
ID=10274930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2839460A Expired GB897584A (en) | 1960-08-16 | 1960-08-16 | A process for extracting isobutylene from mixtures of isobutylene with other c hydrocarbons |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB897584A (en) |
-
1960
- 1960-08-16 GB GB2839460A patent/GB897584A/en not_active Expired
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