1
Abbas Razavi, Guy L G Debras: Process for producing polyolefins and polyolefin catalyst. Fina Research, M Norwood Cheairs, Jim Wheelington, February 17, 1998: US05719241 (43 worldwide citation)

The present invention provides a process for preparing polyolefins having a multimodal or at least bimodal molecular weight distribution by contacting in a reaction mixture under polymerization conditions at least one olefin and a catalyst system comprising a supported catalyst-component comprising ...


2
Guy L G Debras, Georges E M J De Clippeleir, Raymond M Cahen: Process for the isomerization of olefins. Labofina, John K Abokhair, M Norwood Cheairs, May 6, 1986: US04587375 (31 worldwide citation)

A process for the isomerization of n-butenes, comprising contacting, at elevated temperatures, a feed containing n-butenes with a catalyst comprising a crystalline silica polymorph of the silicalite type in the presence of stream to recover a steam containing isobutene. The reaction can be carried o ...


3
Abbas Razavi, Guy L G Debras: Process for producing polyolefins and polyolefin catalyst. Fina Research, William D Jackson, April 1, 2003: US06541413 (22 worldwide citation)

The present invention provides a process for preparing polyolefins having a multimodal or at least bimodal molecular weight distribution by contacting in a reaction mixture under polymeriation conditions at least one olefin and a catalyst system comprising a supported catalyst-component comprising a ...


4
Guy L G Debras, Georges E M J De Clippeleir, Jacques F Grootjans, Raymond M Cahen: Process for the selective hydrogenation of alkynes. Labofina, Mark A Montgomery, John K Abokhair, M Norwood Cheairs, May 16, 1989: US04831200 (13 worldwide citation)

Alkynes are selectively hydrogenated in alkene rich hydrocarbon feeds, such as 1,3-butadiene-rich C.sub.4 cuts, by passing the hydrocarbon feed at least partially in liquid phase over a palladium-based catalyst in the presence of hydrogen, preferably in trickle mode, followed by passing the effluent ...


5
Guy L G Debras, Georges E M J De Clippeleir, Raymond M Cahen: Process for para selective alkylation of aromatic hydrocarbons. Cosden Technology, William D Jackson, John K Abokhair, M Norwood Cheairs, July 8, 1986: US04599473 (10 worldwide citation)

A process for the selective alkylation of monoalkylbenzene into dialkylbenzenes wherein the para isomer of the disubstituted product is present in a concentration greater than in a thermodynamic equilibrium is provided.


6
Guy L G Debras, Georges E M J De Clippeleir, Raymond M Cahen: Process for removing carbonyl-sulfide from liquid hydrocarbon feedstocks. Labofina, John K Abokhair, M Norwood Cheairs, September 23, 1986: US04613724 (8 worldwide citation)

The present invention relates to a process for removing carbonyl sulfide from a liquid olefinic hydrocarbon feedstock comprising (a) passing said hydrocarbon feedstock over an absorbent material comprising zinc oxide and a promoter selected from the group consisting of alumina, silico-aluminas and a ...


7
Georges E M J DeClippeleir, Raymond M Cahen, Hugo Van Thillo, Guy L G Debras: Process for preparing crystalline silicas. Labofina, William D Jackson, John K Abokhair, M Norwood Cheairs, September 20, 1988: US04772456 (7 worldwide citation)

Disclosed is a process for preparing crystalline silicas having the monoclinic symmetry which comprises the step of calcining in air for at least 3 hours at a temperature of at least 500.degree. C. a crystalline silica of the silicalite type having a silica to alumina atomic ratio of at least 80.


8
Raymond M Cahen, Guy L G Debras, Georges E M J DeClippeleir: Crystalline silicas. Labofina, William D Jackson, John K Abokhair, M Norwood Cheairs, November 1, 1988: US04781906 (6 worldwide citation)

A novel crystalline silica composition having a silica to alumina atomic ratio not lower than 80 and having a certain specific X-ray diffraction pattern after calcination in air for at least 3 hours at a temperature of at least 500.degree. C.


9
Guy L G Debras, Georges E M J De Clippeleir, Raymond M Cahen: Process for removing carbonyl-sulfide from liquid hydrocarbon feedstocks. Labofina, Mark A Montgomery, John K Abokhair, M Norwood Cheairs, May 16, 1989: US04830735 (4 worldwide citation)

The present invention relates to a process for removing carbonyl sulfide from a liquid hydrocarbon feedstock, said process comprising the steps of (a) passing said hydrocarbon feedstock over an absorbent material comprising nickel deposited on a support material wherein nickel is present as both nic ...


10
Guy L G Debras, Georges E M J De Clippeleir, Raymond M Cahen: Process for removing carbonyl-sulfide from liquid hydrocarbon feedstocks. Fina Research, Jim D Wheelington, M Norwood Cheairs, November 28, 1995: US05470456 (4 worldwide citation)

The present invention relates to a process for removing carbonyl sulfide from a liquid hydrocarbon feedstock, said process comprising the steps of (a) passing said hydrocarbon feedstock over an absorbent material comprising nickel deposited on a support material wherein nickel is present as both nic ...