GB826545A - Production of conjugated diolefins - Google Patents
Production of conjugated diolefinsInfo
- Publication number
- GB826545A GB826545A GB21877/57A GB2187757A GB826545A GB 826545 A GB826545 A GB 826545A GB 21877/57 A GB21877/57 A GB 21877/57A GB 2187757 A GB2187757 A GB 2187757A GB 826545 A GB826545 A GB 826545A
- Authority
- GB
- United Kingdom
- Prior art keywords
- formaldehyde
- catalyst
- methylbutene
- isobutene
- aldehyde
- 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
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
- C07C2/86—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon
- C07C2/862—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only oxygen as hetero-atoms
- C07C2/867—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only oxygen as hetero-atoms the non-hydrocarbon is an aldehyde or a ketone
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2521/00—Catalysts comprising the elements, oxides or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium or hafnium
- C07C2521/16—Clays or other mineral silicates
-
- 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
- Y02P20/584—Recycling of catalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Conjugated diolefines are prepared by reacting acetaldehyde or formaldehyde with a monoolefine of not more than 6 carbons in the vapour phase over an acidic surface-active clay catalyst. The mono-olefine is preferably a tertiary olefine and may be isobutene, 2-methylbutene-2 or 2-methylbutene-1. Formaldehyde may be introduced as industrial formalin containing 36-40% by weight of formaldehyde or as compounds which give rise to formaldehyde under the reaction conditions, e.g. trioxane and paraformaldehyde. The proportion of aldehyde in the reaction zone is preferably below 10 mol. per cent and this may be achieved by using an inert diluent such as nitrogen, a lower paraffin, carbon dioxide or steam. Reaction temperatures of 150-400 DEG C. can be used with space velocities of 0.5-50 mols. of aldehyde per litre of catalyst per hour. Any pressure may be used but atmospheric or just above is preferred. The catalyst may be an acid-activated montmorillonite, bentonite, fuller's earth. vermiculite, attapulgite, kaolinite or illite and may be used in fixed, moving or fluidized beds. The catalyst is easily regenerated by heating in air to remove carbon. The formation of isoprene from isobutene and formaldehyde is exemplified. Specification 826,546 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB21877/57A GB826545A (en) | 1957-07-10 | 1957-07-10 | Production of conjugated diolefins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB21877/57A GB826545A (en) | 1957-07-10 | 1957-07-10 | Production of conjugated diolefins |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB826545A true GB826545A (en) | 1960-01-13 |
Family
ID=10170319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21877/57A Expired GB826545A (en) | 1957-07-10 | 1957-07-10 | Production of conjugated diolefins |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB826545A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0215567A1 (en) * | 1985-08-07 | 1987-03-25 | Sumitomo Chemical Company, Limited | Production of 2,5-dimethyl-2,4-hexadiene |
| CN114773680A (en) * | 2022-03-10 | 2022-07-22 | 上海工程技术大学 | Organic-inorganic hybrid paraffin/silicon dioxide/modified illite powder phase change microcapsule and preparation method and application thereof |
-
1957
- 1957-07-10 GB GB21877/57A patent/GB826545A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0215567A1 (en) * | 1985-08-07 | 1987-03-25 | Sumitomo Chemical Company, Limited | Production of 2,5-dimethyl-2,4-hexadiene |
| CN114773680A (en) * | 2022-03-10 | 2022-07-22 | 上海工程技术大学 | Organic-inorganic hybrid paraffin/silicon dioxide/modified illite powder phase change microcapsule and preparation method and application thereof |
| CN114773680B (en) * | 2022-03-10 | 2023-06-02 | 上海工程技术大学 | Organic-inorganic hybrid paraffin/silicon dioxide/modified illite powder phase-change microcapsule and preparation method and application thereof |
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