Thoria catalyst

Details Thoria catalyst Thoria catalyst

1997-10-21

1999-07-20

Yildirim, Bekir L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568 58, 568632, 502300, 423252, C07C 43275, B01J 2312

Patent

active

059257989

ABSTRACT:
A more reactive thoria catalyst for the production of diaryl ethers from aromatic compounds, a process for making the catalyst and the use of the catalyst is taught. The thoria catalyst has a specified surface area, density and average crystal size.

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Brey, Jr., et al., "Preparation and Properties of Active Thorium Oxide from Thorium Hydroxide", Journal of Catalysis 3, pp. 303-311 (1964), From the Department of Chemistry, University of Florida, Gainesville.
Abstract: FR 1603748A (19680917) discloses the catalyst is obtained by incorporating in a inert support, a thorium compound, which decomposes to the oxide on heating at 200-600 degrees C, pref. between 300 and 400 degrees C.
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S. Karuppannasamy, et al., "Investigations of Phenol Decomposition on Thoria Catalysts", Proc. Natl. Symp. Catal., 4.sup.th, 1978, pp. 443-450.
E. Briner, et al., "Catalytic Dehydration of Phenols; Influence and Nature of the Position of Substituted Groups", Heb. Chin. Acta., vol. 15, Aug. 1932, pp. 1234-1241.
Karuppannasarny et al., "Investigations of Phenol Decomposition on Thoria Catalysts", Department of Chemistry, Indian Institute of Technology, Madras-600 036(India), Proc. Natl. Symp. Catal., 4.sup.th Edition, 1978, pp. 443-450.
Abstract: 94-46533v Investigations of Phenol Decomposition on Thoria Catalysts, S. Karuppannasamy, et al., (Dep. Chem., Indian Inst. Technol., Madras, 600 036 India). Proc. Natl. Symp. Catal., 4.sup.th 1978 (Pub. 1980), 443-50 (Eng.) Indian Inst. Technol.: Bombay, India.
Abstract: "Catalytic Phenyl Ethers Production", Patent Assignee: Midland-Yorkshire Tar Dis, GB 1236389.
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Francois Claes, et al., "No. 188.--Quantitative Kinetics in Heterogeneous Catalysis: Dehydration of Phenols on Thoria", (Physical Chemistry Laboratory, University of Louvain, Belgium, Manuscript received on Apr. 3, 1962), Bull. Soc. Chim. Franc., vol. 964, pp. 1042-1046, Series 5 (1962)--Memoranda presented to the Chemical Society (Translation from French).
Abstract: 85-50883 MITC * E14 84-315126/51 *J5 9196-835-A; Di:phenyl ether(s) prepn. with high selectivity--by contacting phenol(s) with titanium oxide or zirconium oxide in the vapour phase.
Abstract: "Thorium Oxide Catalyst for Selective De-Hydration--of Secondary Alcohols t alpha", Patent Assignee: Inst Francais Du Petrole, FR 1603748.
Abstract: OLS 1, 810, 179; Diaryl ethers in which each aromatic nucleus is substituted by at least one secondary or tertiary . . . , 21.11.68. P 1810179.6 (22.11.67. G.B. 53181/67) Midland-Yorkshire Tar Distillers Ltd. (24.7.69). C07c.
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"Reactions of Phenols and Alcohols Over Thoria"; S. Karuppannasamy, et al.; J. of Catalysis 63; pp. 433-437 (1980).
"Reactions of Phenols and Alcohols Over Thoria: Mechanism of Ether Formation"; S. Karuppannasamy, et al.; J. Of Catalysis 66; pp. 281-289 (1980).
Catalysis in Organic Syntheses, Edited by W. H. Jones (1980); pp. 119-132.

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