GB911246A - Improvements in and relating to hydration and dehydration processes and to catalyststherefor - Google Patents

Improvements in and relating to hydration and dehydration processes and to catalyststherefor

Info

Publication number
GB911246A
GB911246A GB15718/60A GB1571860A GB911246A GB 911246 A GB911246 A GB 911246A GB 15718/60 A GB15718/60 A GB 15718/60A GB 1571860 A GB1571860 A GB 1571860A GB 911246 A GB911246 A GB 911246A
Authority
GB
United Kingdom
Prior art keywords
alumina
thoria
hydration
catalysts
phenol
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
Application number
GB15718/60A
Inventor
Raymond Jackson Moss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB15718/60A priority Critical patent/GB911246A/en
Publication of GB911246A publication Critical patent/GB911246A/en
Expired legal-status Critical Current

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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/12—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of actinides
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
    • C07C37/01—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by replacing functional groups bound to a six-membered aromatic ring by hydroxy groups, e.g. by hydrolysis
    • C07C37/055—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by replacing functional groups bound to a six-membered aromatic ring by hydroxy groups, e.g. by hydrolysis the substituted group being bound to oxygen, e.g. ether group
    • 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
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Catalysts (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Hydration-dehydration catalysts comprising thoria supported on a -alumina. are prepared by treating a -alumina in the solid phase to produce a deposit of thoria in its pores. They are suitable for catalysing the hydration of diphenyl oxides to the corresponding phenol or phenols as well as the reverse dehydration. They may be prepared by impregnating a -alumina which may be pelleted, with a solution of a thorium salt, e.g. the nitrate, and converting the salt to thoria; alternatively the alumina may be impregnated by teating it in aqueous suspension with a solution of a thorium salt. In this case it is preferably treated with ammonia to precipitate thorium hydroxide which is then converted by heating to thoria. Catalysts are preferred which contain about 25% thoria by weight of the alumina and which are in the form of pellets. The a -alumina may be obtained by firing alumina for 6 hours at 1000-1500 DEG C. The catalysts are regenerated by heating in a stream of air at 500 DEG C. The example describes the preparation and use of the catalysts.ALSO:The hydration of diphenyl oxides to a phenol or phenols and the corresponding dehydration is effected in the presence of a catalyst comprising thoria supported on a -alumina (see Group III). The reactions are preferably performed in the vapour phase at atmospheric pressure and elevated temperature, e.g. for diphenyl oxide itself 475 DEG C. The process may be carried out in successive cycles of reaction and regeneration, being accomplished by heating the catalyst in a stream of air at 500 DEG C. Specified reactants are diphenyl oxide, bis(p - methylphenyl)oxide, phenol p and p-cresol. In the example diphenyl oxide is converted to phenol.
GB15718/60A 1960-05-04 1960-05-04 Improvements in and relating to hydration and dehydration processes and to catalyststherefor Expired GB911246A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB15718/60A GB911246A (en) 1960-05-04 1960-05-04 Improvements in and relating to hydration and dehydration processes and to catalyststherefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15718/60A GB911246A (en) 1960-05-04 1960-05-04 Improvements in and relating to hydration and dehydration processes and to catalyststherefor

Publications (1)

Publication Number Publication Date
GB911246A true GB911246A (en) 1962-11-21

Family

ID=10064236

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15718/60A Expired GB911246A (en) 1960-05-04 1960-05-04 Improvements in and relating to hydration and dehydration processes and to catalyststherefor

Country Status (1)

Country Link
GB (1) GB911246A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0083140A1 (en) * 1981-12-24 1983-07-06 Stamicarbon B.V. Process for the decarboxylative oxidation of a benzene monocarboxylic acid
EP0317208A2 (en) * 1987-11-16 1989-05-24 Amoco Corporation Preparation of Diaryl Ethers and Diaryl Sulfides
US4978811A (en) * 1988-04-01 1990-12-18 The Dow Chemical Company Process for hydrolysis of ortho-aromatic di-aryl ethers
US5925798A (en) * 1995-03-08 1999-07-20 Solutia Inc. Thoria catalyst

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0083140A1 (en) * 1981-12-24 1983-07-06 Stamicarbon B.V. Process for the decarboxylative oxidation of a benzene monocarboxylic acid
EP0317208A2 (en) * 1987-11-16 1989-05-24 Amoco Corporation Preparation of Diaryl Ethers and Diaryl Sulfides
US4898982A (en) * 1987-11-16 1990-02-06 Amoco Corporation Preparation of diaryl ethers and diaryl sulfides
EP0317208A3 (en) * 1987-11-16 1990-11-28 Amoco Corporation Preparation of diaryl ethers and diaryl sulfides
US4978811A (en) * 1988-04-01 1990-12-18 The Dow Chemical Company Process for hydrolysis of ortho-aromatic di-aryl ethers
US5925798A (en) * 1995-03-08 1999-07-20 Solutia Inc. Thoria catalyst

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