GB571736A - Dehydrogenation of butenes to butadiene - Google Patents
Dehydrogenation of butenes to butadieneInfo
- Publication number
- GB571736A GB571736A GB12620/43A GB1262043A GB571736A GB 571736 A GB571736 A GB 571736A GB 12620/43 A GB12620/43 A GB 12620/43A GB 1262043 A GB1262043 A GB 1262043A GB 571736 A GB571736 A GB 571736A
- Authority
- GB
- United Kingdom
- Prior art keywords
- butene
- heated
- temperature
- butadiene
- feed
- 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
- C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
- C07C5/32—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen
- C07C5/327—Formation of non-aromatic carbon-to-carbon double bonds only
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
In the manufacture of butadiene by thermal non-catalytic dehydrogenation of a butene, a hydrocarbon mixture comprising predominantly C4 hydrocarbons and containing a substantial amount of a normal butene is heated to a dehydrogenating temperature by mixing with a separately heated inert gas having a temperature substantially above that of dehydrogenation, and rapidly quenching the resulting product. A suitable feed may be prepared by dehydration of butyl alcohol, dehydrohalogenation of chlorbutane or, preferably, by treating a C4 fraction of cracked gas with cold sulphuric acid to remove isobutene, contacting with warm acid to isomerize butene-1 to butene-2, and separating the olefin from paraffins by extractive distillation. The butene feed is preheated to below about 550, preferably 450-550 DEG C., an inert gas such as hydrogen, methane, ethane, steam, carbon dioxide or nitrogen is heated to about 700-1200, generally 800-1000 DEG C., and mixed rapidly therewith to give a temperature above 600, preferably 650-850 DEG C. The time of reaction varies and is chosen to give a conversion of 5-85 per cent of the butene in the feed. Contact with ferrous metals or iron oxides is avoided, heated surfaces preferably being of copper alloys or ceramics. Pressures are about atmospheric or below, preferably not substantially above 100-150 lbs./sq. in. The products are rapidly quenched by admixture with a cold fluid such as water or hydrocarbon which is inert and easily separable to lower the temperature to below 450, preferably 400-300 DEG C. Butadiene and, if desired, a butene fraction for recycling may be separated from the products. Butene-1 may be isomerized to butene-2 before recycling.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US571736XA | 1942-09-15 | 1942-09-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB571736A true GB571736A (en) | 1945-09-06 |
Family
ID=22008950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12620/43A Expired GB571736A (en) | 1942-09-15 | 1943-08-04 | Dehydrogenation of butenes to butadiene |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB571736A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103588609A (en) * | 2012-08-14 | 2014-02-19 | 中国石油化工股份有限公司 | Preparation method for butadiene |
CN103788991A (en) * | 2012-10-29 | 2014-05-14 | 中国石油化工股份有限公司 | Steam cracking method |
CN104250200A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Butadiene preparation method |
CN104250199A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Butadiene preparation method |
CN104250198A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Butadiene preparation method |
CN104250196A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Butadiene preparation method |
CN104250197A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Butadiene preparation method |
US9505677B2 (en) | 2012-10-29 | 2016-11-29 | China Petroleum & Chemical Corporation | Steam cracking processes |
-
1943
- 1943-08-04 GB GB12620/43A patent/GB571736A/en not_active Expired
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103588609A (en) * | 2012-08-14 | 2014-02-19 | 中国石油化工股份有限公司 | Preparation method for butadiene |
CN103788991A (en) * | 2012-10-29 | 2014-05-14 | 中国石油化工股份有限公司 | Steam cracking method |
CN103788991B (en) * | 2012-10-29 | 2016-03-30 | 中国石油化工股份有限公司 | A kind of steam cracking method |
US9505677B2 (en) | 2012-10-29 | 2016-11-29 | China Petroleum & Chemical Corporation | Steam cracking processes |
CN104250200A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Butadiene preparation method |
CN104250199A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Butadiene preparation method |
CN104250198A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Butadiene preparation method |
CN104250196A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Butadiene preparation method |
CN104250197A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Butadiene preparation method |
CN104250198B (en) * | 2013-06-28 | 2016-03-30 | 中国石油化工股份有限公司 | A kind of preparation method of divinyl |
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