GB1078117A - Chemical methods - Google Patents
Chemical methodsInfo
- Publication number
- GB1078117A GB1078117A GB46830/63A GB4683063A GB1078117A GB 1078117 A GB1078117 A GB 1078117A GB 46830/63 A GB46830/63 A GB 46830/63A GB 4683063 A GB4683063 A GB 4683063A GB 1078117 A GB1078117 A GB 1078117A
- Authority
- GB
- United Kingdom
- Prior art keywords
- catalyst
- steam
- fed
- phosphoric acid
- stages
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/14—Phosphorus; Compounds thereof
- B01J27/16—Phosphorus; Compounds thereof containing oxygen, i.e. acids, anhydrides and their derivates with N, S, B or halogens without carriers or on carriers based on C, Si, Al or Zr; also salts of Si, Al and Zr
- B01J27/18—Phosphorus; Compounds thereof containing oxygen, i.e. acids, anhydrides and their derivates with N, S, B or halogens without carriers or on carriers based on C, Si, Al or Zr; also salts of Si, Al and Zr with metals other than Al or Zr
- B01J27/1802—Salts or mixtures of anhydrides with compounds of other metals than V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re, e.g. phosphates, thiophosphates
- B01J27/1808—Salts or mixtures of anhydrides with compounds of other metals than V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re, e.g. phosphates, thiophosphates with zinc, cadmium or mercury
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/14—Phosphorus; Compounds thereof
- B01J27/16—Phosphorus; Compounds thereof containing oxygen, i.e. acids, anhydrides and their derivates with N, S, B or halogens without carriers or on carriers based on C, Si, Al or Zr; also salts of Si, Al and Zr
- B01J27/18—Phosphorus; Compounds thereof containing oxygen, i.e. acids, anhydrides and their derivates with N, S, B or halogens without carriers or on carriers based on C, Si, Al or Zr; also salts of Si, Al and Zr with metals other than Al or Zr
- B01J27/1802—Salts or mixtures of anhydrides with compounds of other metals than V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re, e.g. phosphates, thiophosphates
- B01J27/1806—Salts or mixtures of anhydrides with compounds of other metals than V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re, e.g. phosphates, thiophosphates with alkaline or alkaline earth metals
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
- C07C1/20—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as heteroatoms
- C07C1/247—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as heteroatoms by splitting of cyclic ethers
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2527/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- C07C2527/14—Phosphorus; Compounds thereof
- C07C2527/16—Phosphorus; Compounds thereof containing oxygen
- C07C2527/167—Phosphates or other compounds comprising the anion (PnO3n+1)(n+2)-
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2527/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- C07C2527/14—Phosphorus; Compounds thereof
- C07C2527/16—Phosphorus; Compounds thereof containing oxygen
- C07C2527/167—Phosphates or other compounds comprising the anion (PnO3n+1)(n+2)-
- C07C2527/173—Phosphoric acid or other acids with the formula Hn+2PnO3n+1
-
- 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)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Catalysts (AREA)
Abstract
Diene hydrocarbons are prepared by reacting dioxan-1,3 with steam containing 0.002-0.06 wt. per cent of phosphoric acid in the presence of a normal metal phosphate, e.g. tricalcium and/or tricadmium phosphate. The catalyst may contain 3-10% of a corresponding hydrogen phosphate. The process may be carried out in a multi-stage reactor in which the phosphoric acid is fed at different rates into the different stages together with steam at 700-800 DEG C., said steam being fed to the first stage at a constant rate of about 1 kg./litre of catalyst/hour and into the other stages at such a rate that the total quantity of steam fed into all the stages is about 1.2 kg./litre of total catalyst/hour. The phosphoric acid need not be added to the catalyst during catalysis but may be added during regeneration of the catalyst. The examples describe the preparation of isoprene, 1,3-butadiene and methyl pentadiene from 4,4-dimethyl, 4-dimethyl and 2,4,4,6-tetramethyl-dioxan-1,3 respectively.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP1271A DE1271106B (en) | 1963-10-05 | 1963-10-05 | Process for the production of diene hydrocarbons by catalytic cleavage of 1,3-dioxanes |
GB46830/63A GB1078117A (en) | 1963-11-27 | 1963-11-27 | Chemical methods |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB46830/63A GB1078117A (en) | 1963-11-27 | 1963-11-27 | Chemical methods |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1078117A true GB1078117A (en) | 1967-08-02 |
Family
ID=10442740
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB46830/63A Expired GB1078117A (en) | 1963-10-05 | 1963-11-27 | Chemical methods |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1078117A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3714202A (en) * | 1969-07-15 | 1973-01-30 | Atlantic Richfield Co | Vinyl glycerol acetals |
FR2195585A1 (en) * | 1972-08-08 | 1974-03-08 | Inst Neftechimichesk | Metal phosphate prepn - with very low acid content |
FR2464747A1 (en) * | 1979-09-11 | 1981-03-20 | Batalin Oleg | Calcium phosphate catalyst prodn. for decomposition of 1,3-dioxane(s) - by pptn. of calcium phosphate in presence of ammonia,then steaming in presence of conditioning agent |
WO2021173739A1 (en) | 2020-02-28 | 2021-09-02 | The Procter & Gamble Company | Method of using nanofiltration and reverse osmosis to remove chemical contaminants |
-
1963
- 1963-11-27 GB GB46830/63A patent/GB1078117A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3714202A (en) * | 1969-07-15 | 1973-01-30 | Atlantic Richfield Co | Vinyl glycerol acetals |
FR2195585A1 (en) * | 1972-08-08 | 1974-03-08 | Inst Neftechimichesk | Metal phosphate prepn - with very low acid content |
FR2464747A1 (en) * | 1979-09-11 | 1981-03-20 | Batalin Oleg | Calcium phosphate catalyst prodn. for decomposition of 1,3-dioxane(s) - by pptn. of calcium phosphate in presence of ammonia,then steaming in presence of conditioning agent |
WO2021173739A1 (en) | 2020-02-28 | 2021-09-02 | The Procter & Gamble Company | Method of using nanofiltration and reverse osmosis to remove chemical contaminants |
WO2021173738A1 (en) | 2020-02-28 | 2021-09-02 | The Procter & Gamble Company | Method to remove chemical contaminants |
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