Catalytic hydrodehalogenation of polyhalogenated hydrocarbons

Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – From nonhydrocarbon feed

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

585638, 585641, 585733, 570227, C07C 126

Patent

active

052762408

ABSTRACT:
A novel catalytic process involving complete hydrodehalogenation of halogenated aliphatic hydrocarbons in the presence of a hydrogen donor and a modified zeolite catalyst has been developed. The process is operated in a continuous flow mode and reaction products consist exclusively of hydrogen halide and hydrocarbons. The relative ratio of paraffins to olefins to aromatics obtained in the product distribution is a strong function of the ratio of hydrogen to reactant and the space velocity and temperature employed. The catalyst employed is a nickel metal modified shape selective zeolite that takes advantage of the hydrogenolysis ability of nickel and the acidic-shape selective properties of the zeolite.

REFERENCES:
patent: 3894107 (1975-07-01), Butter et al.
patent: 4046825 (1977-09-01), Owen et al.
patent: 4049738 (1977-09-01), Young
patent: 4112056 (1978-09-01), Chen et al.
patent: 4144192 (1979-03-01), Reinhardt, III
patent: 4306106 (1981-12-01), Kerr et al.
patent: 4384159 (1983-05-01), Diesen
patent: 4652688 (1987-03-01), Brophy et al.
Weiss et al; "Hydrodechlorination and Oligomerization of Carbon Tetrachloride over Nickel Y Zeolites": Journal of Catalysis, 1982, 74, 136-143.
Chemical Abstracts vol. 91: No. 63337Q.
Oku, et al., "Complete Destruction of Tetra- and Tri-Chloroethylene by Reductive Dechlorination Using Sodium Naphthalenide", Chemistry Express, 5, 181-184 (1990).
Chuang, et al., "Gas-Phase Reactions of Chloroform and 1,1,2-Trichloroethane with Hydrogen in a Tubular Flow Reactor," Ind. Eng. Chem. Process. Des. Dev., 25, 317-321 (1986).
Gokhberg, et al., "Heterogeneous Catalytic Dehydrochlorination of 1,1,2-Trichloroethane. III. Study of the Features of Deactivation of Silica Gel Modified with Alkali Metal Compounds," Kinetika i Kataliz, 30, 1376-1380 (1989).
Bartholomew, et al., "Chemistry of Nickel-Alumina Catalysts," J. Catalysis, 45, 41-53 (1976).
Mochida, et al., "Linear Free-Energy Relationships in Heterogeneous Catalysis. VI. Catalytic Elimination Reaction of Hydrogen Chloride from Chloroethanes on Solid Acids and Bases," J. Org. Chem., 32, 3894-3898 (1967).
Mochida, et al., "Dehydrochlorination and Dechlorination of Chloroethanes on Chromia Catalyst," J. Org. Chem. 5, 33, 2163-2165 (1968).
Mochida et al., "Elimination Reaction of Hydrogen Chloride from 1,1,2-Trichloroethane on Ion-Exchanged Molecular Sieves," J. Org. Chem., 33, 2161-2163 (1968).
Mochida et al., "Catalytic Dehydrochlorination over Alumina Promoted by Steam," J. of Catalysis, 51, 72-79 (1978).
Mochida et al., "Selective Dehydrochlorination of Ethylene Chlorohydrin over Acid-Proof Basic Catalysts Recovering Dry Hydrogen Chloride," Ind. Eng. Chem. Prod. Res. Dev., 22, 38-40 (1983).
Mochida et al., "Catalytic Dehydrochlorination of 3,4-Dichloro-1-butene over CsCl Supported on Silica Gel," Ind. Eng. Chem. Prod. Res. Dev., 25, 496-499 (1986).
Imamura et al., "Decomposition of 1,2-Dichloroethane on TiO.sub.2 /SiO.sub.2," Ind. Eng. Chem. Res., 28, 1449-1452 (1989).
Helt, J. E., "Biofuels and Municipal Waste Technology Research Program Summary: FY 1986," DOE Report NTIS, PC A16/MF AO1, Energy Research Reports, 1987.
Shishkov, et al., "Catalytic Conversion of Thiophene and Mercaptans on a Cobalt-Molybdenum Catalyst," Dokl. Bolg. Akad. Nauk., 35, 45-48 (1982).
Naum, et al., "Statistical-Mathematical Analysis of the Influence of Y Zeolite Catalysts in Various Polycationic Forms on the Conversion of Hydrodechlorination Reaction of Some Chlorinated Organic Compounds. I. Hydrodechlorination of Chlorobezene," Bul. Inst. Politech, lasi, sec. 2, Chim Ing. Chim., 25, number 1-2, 53-58 (1979).
Dialog Search Report.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Catalytic hydrodehalogenation of polyhalogenated hydrocarbons does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Catalytic hydrodehalogenation of polyhalogenated hydrocarbons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalytic hydrodehalogenation of polyhalogenated hydrocarbons will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-309117

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.