Patents Assigned to Europeenne de Retraitement de Catalyseurs Eurecat
-
Patent number: 6559092Abstract: The present invention concerns a process for sulphurising a hydrocarbon hydrotreatment catalyst in the presence of hydrogen and at least one sulphur-containing compound. The process is characterized in that the catalyst comprises a carbon-containing compound the major portion of which is not leachable deposited in its pores. The invention is of particular application to sulphurization carried out off-site.Type: GrantFiled: August 17, 2000Date of Patent: May 6, 2003Assignee: Europeenne de Retraitement de Catalyseurs EurecatInventors: Pierre Dufresne, Franck Labruyere, Michel Lacroix, Christophe Geantet, Cecile Glasson
-
Publication number: 20020098971Abstract: Process for the regeneration of a solid catalyst or of a solid adsorbent wherein the catalyst or the adsorbent is used in the form of a bed in a regeneration zone, in which bed the catalyst is in motion, said process comprising at least one heating step under a reductive atmosphere.Type: ApplicationFiled: January 19, 2001Publication date: July 25, 2002Applicant: Europeenne De Retraitement De Catalyseurs-EurecatInventors: James Robinson, Nilanjan Brahma, Georges Mendakis, Francois Locatelli, Pierre Dufresnce
-
Patent number: 6417134Abstract: The invention relates to a process for the ex-situ presulfuration of a catalyst for the hydroconversion of hydrocarbons in the presence of hydrogen and of at least one sulfurated compound. It is characterized in that the catalyst is also brought into contact with at least one hydrocarbon compound.Type: GrantFiled: October 12, 1999Date of Patent: July 9, 2002Assignee: Europeenne de Retraitement de Catalyseurs EurecatInventors: Pierre Dufresne, Franck Labruyere
-
Patent number: 6294498Abstract: Process for passivation of a heterogenous catalyst of refining reactions or hydrocarbon hydroconversion reactions, characterized in that the external surface of the particles of said heterogeneous catalyst is coated with a protective layer that is made of a particularly inert material which can be eliminated in the reaction zone under the conditions of the reaction.Type: GrantFiled: August 11, 1998Date of Patent: September 25, 2001Assignee: Europeenne de Retraitement de Catalyseurs EurecatInventors: Joan Darcissac, Franck Labruyere, Nilanjan Brahma, Pierre Dufrense
-
Patent number: 6100216Abstract: A process for presulfurizing a hydrocarbon treatment catalyst and/or for preconditioning a catalyst, comprising one or two stages of incorporating sulfur into the pores of a hydrocarbon conversion catalyst conducted off-site in at least one zone that contains a catalyst, preferably in motion, and with either suilirated hydrogen (H.sub.2 S), sulfur, or a sulfur compound capable of evolving nascent suilirated hydrogen.Type: GrantFiled: January 16, 1997Date of Patent: August 8, 2000Assignee: Europeenne de Retraitement de Catalyseurs EurecatInventors: Pierre Dufresne, Nilanjan Brahma, Jean Darcissac, Franck Labruyere
-
Patent number: 5854162Abstract: The invention concerns a process for the regeneration of a used hydrocarbon treatment catalyst, preferably a reforming catalyst, containing at least one precious metal preferably platinum, optionally at least one additional metal selected from the group formed by metals from groups 7, 8, 9, 10, 13 and 14 of the periodic classification of the elements and copper, optionally and preferably at least one halogen, preferably chlorine, and at least one porous support, preferably alumina, said process comprising at least one of the following two successive steps: at least one step (1) for the combustion of the coke present on said catalyst, carried out in the presence of an oxygen-containing gas, at a temperature in the range of 300.degree. C. to 680.degree. C. for a time in the range 0.3 to 7 hours, at least one step (2) for oxyhalogenation, preferably oxychlorination, carried out in a controlled air atmosphere, at a temperature in the range 350.degree. C. to 550.degree. C., for a time in the range 0.Type: GrantFiled: October 14, 1997Date of Patent: December 29, 1998Assignee: Europeenne de Retraitement de Catalyseurs EurecatInventors: Pierre Dufresne, Nilanjan Brahma
-
Patent number: 5823684Abstract: The present invention relates to belts used to protect drums formed by bags intended for transport of powders, granules or other powdery materials from tearing. The invention relates in particular to a belt designed to protect the drum formed by a bag intended for transporting materials placed in the body of said bag, to prevent it from tearing as a result of an external force, and being characterised in that it is cylindrical in shape, at least the top edge of its top and bottom edges being provided with an elastic band.Type: GrantFiled: October 2, 1997Date of Patent: October 20, 1998Assignee: Europeenne de Retraitement de Catalyseurs EurecatInventor: Francis Valeri
-
Patent number: 5654252Abstract: A process is provided for starting a catalytic hydrocarbon conversion reaction or using a hydrocarbon conversion catalyst into which a sulfur agent has been incorporated. In an inert atmosphere, the sulfur-impregnated catalyst is treated with dilute hydrogen to prevent excessive temperatures during the exothermic transformation of oxides into sulfides of the active metals of the catalyst.Type: GrantFiled: May 31, 1995Date of Patent: August 5, 1997Assignee: Europeenne De Retraitement De Catalyseurs EurecatInventors: Pierre Dufresne, Hans Rabehasaina, Georges Berrebi
-
Patent number: 5499746Abstract: The invention relates to a process and apparatus for transport, storage, loading and unloading of catalyst or adsorbent particles utilizing a special container equipped with a fluid-tight valve and which can rock progressively by means of a reverse-lock, escapement-type ratchet.Type: GrantFiled: April 11, 1994Date of Patent: March 19, 1996Assignee: Europeenne de Retraitement de Catalyseurs EurecatInventors: Georges Berrebi, Yves Jacquier, Habbo Edens, Gerrit Middelkoop
-
Patent number: 5397756Abstract: For the impregnation into the pores of a hydrocarbon treatment catalyst of a sulfurizing agent chosen from element sulfur and organic polysulfides with the aid of a solvent, the impregnation process totally or partially comprises a constituent of the olefin or olefin fraction type, e.g., of the vegetable oil type, or a similar constituent. The use of such a constituent makes it possible to significantly reduce the exothermal effect which occurs during presulfurization, compared with the exothermal effects obtained without using such a constituent.Type: GrantFiled: April 1, 1993Date of Patent: March 14, 1995Assignee: Europeenne de Retraitement de Catalyseurs (EURECAT)Inventors: Pierre Dufresne, Bernard Legall, Georges Berrebi
-
Patent number: 5153163Abstract: The invention relates to a pretreatment of a petrochemical or refining catalyst containing at least one metal in metallic or metallic oxide form, deposited on a support.The catalyst is impreganted by a solution or a suspension containing on the one hand a specific sulphur agent, e.g., diethanol disulfide and on the other an organic reducing agent, e.g., formic acid.Type: GrantFiled: July 12, 1991Date of Patent: October 6, 1992Assignee: Europeenne de Retraitement de Catalyseurs EurecatInventors: Raymond Roumieu, Jean-Paul Boitiaux
-
Patent number: 5139983Abstract: The invention relates to a process making it possible when a refining catalyst is subject preferably in situ to the conventional activation reaction in the presence of hydrogen (generally at above 100.degree. C.) to carry out, as a result of the in situ presence of hydrogen, the sulphurization at the required stoichiometric or non-stoichiometric level of the active metal or metals in the composition of the catalyst. In the absence of hydrogen, the process consists of incorporating into the porosity of the new or regenerated catalyst at least one sulphurizing agent of general formula:R--S(n)--R'in which n is an integer from 3 to 20 and R represents an organic radical.The invention is characterized in that a critical elementary sulphur quantity is added to the sulphurizing agent.Type: GrantFiled: March 19, 1991Date of Patent: August 18, 1992Assignee: Europeenne de Retraitement de Catalyseurs (Eurecat)Inventors: Georges Berrebi, Bernard Le Gall
-
Patent number: 5068477Abstract: This invention concerns a process for reducing a refining catalyst before it is put into use, the catalyst containing a support and an active phase based on at least one noble or non-noble metal of group VIII or of group Ib of the periodic classification of elements, consisting of:(a) impregnating the catalyst with an aqueous or organic solution of a reducing agent,(b) decomposing the reducing agent by heating with a catalyst, and(c) drying the catalyst thus obtained.The catalyst is used in selective hydrogention of a feed such as olefin, acetylenes, diolefins etc.Type: GrantFiled: April 29, 1991Date of Patent: November 26, 1991Assignee: Europeenne de Retraitement de Catalyseurs EurecatInventor: Georges Berrebi
-
Patent number: 4839031Abstract: The invention relates to a process for the separation of granulate materials, in extruded form of different lengths and of the same or different diameter. It is characterized by the use of a helicoidal vibrating elevator subjected to vibrations whose amplitude is chosen so as to cause on the threads of the spiral on the one hand the ascending flow of all the particles and on the other hand the recovery of the finest particles on the outer edge of the upper thread of the spiral and the largest particles on the inner edge of the upper thread of this spiral.Type: GrantFiled: December 9, 1987Date of Patent: June 13, 1989Assignee: Europeenne de Retraitement de Catalyseurs EurecatInventors: Francois Ackermann, Georges Berrebi
-
Patent number: 4719195Abstract: The invention concerns a process for sulfurizing a catalyst, particularly a refining catalyst comprising a carrier and active metal oxides.In a first step, a sulfur compound mainly consisting of organic polysulfide is introduced into the catalyst mass. A second step consists of first sulfurizing, in the absence of hydrogen, the active metal oxides at a temperature lower than 275.degree. C. and then activating the catalyst at a temperature higher than 275.degree. C.The present invention concerns a process for presulfurizing a hydrocarbon treatment catalyst and/or preconditioning a catalyst in view of subsequent presulfurization.Type: GrantFiled: October 30, 1985Date of Patent: January 12, 1988Assignee: Europeenne de Retraitement de Catalyseurs (Eurecat)Inventors: Herve Toulhoat, Georges Berrebi