Patents by Inventor Régis Poisson
Régis Poisson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6322769Abstract: The present invention is a Ca(OH)2 particle composition and a method of making the composition, the composition consisting essentially of dried calcium hydroxide particles having a moisture content of less than 2 percent by weight of the total composition, a specific surface area greater than 30 m2/g, a total nitrogen desorption pore volume of at least 0.1 cm3/g, and a CO2 content of less than 2 percent by weight of the total composition, the aforementioned particles being in the form of a mixture comprising first fraction of particles having a size of less than 32 micrometers and a second fraction of particles of a size greater than 32 micrometers, the weight percent of the second fraction ranging from 20 to 50 percent, the aforementioned particles having a nitrogen desorption pore volume consisting of pores with a diameter ranging from 100 to 400 Angstroms.Type: GrantFiled: June 29, 1998Date of Patent: November 27, 2001Assignee: Lloist Recherche et Developpement S.A.Inventors: Henri René Langelin, Régis Poisson, Alain Laudet, Olivier Françoisse
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Patent number: 6066308Abstract: Provided is a process for preparing alumina agglomerates which comprises:(i) treating agglomerates of active alumina with an aqueous medium comprising at least one acid making it possible to dissolve at least part of the alumina and at least one compound providing an anion capable of combining with aluminum ions in solution,(ii) subjecting the agglomerates to a hydrothermal treatment at a temperature in the range of from about 80.degree. C. to about 250.degree. C., and then(iii) thermally activating the agglomerates at a temperature in the range of about 500.degree. C. to about 1100.degree. C.The resulting alumina agglomerates possess exceptional mechanical strength, heat resistance and hydrothermal resistance and are useful as catalysts or catalyst supports.Type: GrantFiled: June 5, 1995Date of Patent: May 23, 2000Assignee: L'Institut Francais du PetroleInventors: Thierry Dupin, Jean Lavina, Regis Poisson
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Patent number: 6056937Abstract: Provided is a process for preparing alumina agglomerates which comprises:(i) treating agglomerates of active alumina with an aqueous medium comprising at least one acid making it possible to dissolve at least part of the alumina and at least one compound providing an anion capable of combining with aluminum ions in solution,(ii) subjecting the agglomerates to a hydrothermal treatment at a temperature in the range of from about 80.degree. C. to about 250.degree. C., and then(iii) thermally activating the agglomerates at a temperature in the range of about 500.degree. C. to about 1100.degree. C.The resulting alumina agglomerates possess exceptional mechanical strength, heat resistance and hydrothermal resistance and are useful as catalysts or catalyst supports.Type: GrantFiled: June 28, 1993Date of Patent: May 2, 2000Assignee: L'Institut Francais du PetroleInventors: Thierry Dupin, Jean Lavina, Regis Poisson
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Patent number: 5244648Abstract: Provided is a process for preparing alumina agglomerates which comprises:(i) treating agglomerates of active alumina with an aqueous medium comprising at least one acid making it possible to dissolve at least part of the alumina and at least one compound providing an anion capable of combining with aluminum ions in solution,(ii) subjecting the agglomerates to a hydrothermal treatment at a temperature in the range of from about 80.degree. C. to about 250.degree. C., and then(iii) thermally activating the agglomerates at a temperature in the range of about 500.degree. C. to about 1100.degree. C.The resulting alumina agglomerates possess exceptional mechanical strength, heat resistance and hydrothermal resistance and are useful as catalysts or catalyst supports.Type: GrantFiled: April 2, 1992Date of Patent: September 14, 1993Assignee: Rhone-Poulenc IndustriesInventors: Thierry Dupin, Jean Lavina, Regis Poisson
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Patent number: 4748016Abstract: Finely divided powders of alkaline earth metal titanates, well suited for the fabrication of, e.g., ceramic resistors and condensers, are facilely prepared by (i) admixing a solution of an alkaline earth metal nitrate with a titanium sol having a pH ranging from 0.8 to 2.5 and which comprises elementary crystallites of TiO.sub.2 having particle sizes ranging from 10 to 100 .ANG., agglomerated into submicronic masses having particle sizes ranging from 200 to 1000 .ANG., (ii) next drying the suspension which results, (iii) calcining said dried suspension at a temperature ranging from 700.degree. to 1300.degree. C. for from 30 minutes to 24 hours, under a NO.sub.x partial pressure decreasing from 1 to 0, and then (iv) optionally grinding the powder resulting from said step (iii).Type: GrantFiled: September 14, 1984Date of Patent: May 31, 1988Assignee: Rhone-Poulenc Specialites ChimiquesInventors: Jean-Philippe Browaeys, Jean-Francois Colombet, Patrick Dougier, Claude Magnier, Regis Poisson
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Patent number: 4540559Abstract: Type Y zeolites were adopted as, e.g., catalysts and adsorbents, are facilely prepared by (i) intimately admixing, at essentially ambient temperature, an aqueous solution of a water-soluble aluminum compound with an aqueous solution of sodium silicate as to prepare a reaction mixture solution or sol therefrom, (ii) next heating said reaction mixture solution or sol to a temperature of crystallization, ranging from about 50.degree. to 120.degree. C., by heat exchange within such rapid period of time as to avoid any phase conversion thereof, but whereafter said reaction mixture solution or sol transforms essentially immediately into a gel, and (iii) thence maintaining the resulting gel at such crystallization temperature until Type Y zeolite crystals are crystallized therefrom.Type: GrantFiled: August 22, 1983Date of Patent: September 10, 1985Assignee: Rhone-Poulenc Specialites ChimiquesInventors: Bertrand Latourrette, Regis Poisson
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Patent number: 4388288Abstract: Shaped titanium oxide catalysts/carriers useful, e.g., for sulfur recovery via Claus catalysis, are prepared by (i) intimately admixing powdered, poorly crystalline and/or amorphous titanium oxide, said titanium oxide powder being characterized by a weight loss on ignition ranging from 1 to 50%, water and from 0 to about 15% by weight of a shaping additive, (ii) next shaping the intimate admixture which results, and (iii) thence, optionally after drying, calcining the product shaped article.Type: GrantFiled: April 23, 1981Date of Patent: June 14, 1983Assignee: Rhone-Poulenc IndustriesInventors: Thierry Dupin, Gilbert Bouge, Regis Poisson
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Patent number: 4315839Abstract: Spheroidal alumina particulates having bifold porosity are prepared by (i) intimately admixing, at a pH of less than about 7.5, (a) a sol of a member selected from the group consisting of ultrafine boehmite and pseudo-boehmite, said sol being devoid of amorphous alumina and the concentration by weight thereof, in content by weight of Al.sub.2 O.sub.3, being between 5 and 25%, with (b) from 30 to 95% by weight, based upon the total solids content of the admixture, of spheroidal alumina particulates essentially completely in at least one of the phases eta, gamma, delta and theta, such particulates having a micropore volume ranging from about 0.4 to 1 cm.sup.3 /g, a specific surface ranging from about 100 to 350 m.sup.2 /g, and particle diameters ranging from about 1 to 50 microns; (ii) prilling said intimate admixture into spheroidal particulates and gelling the same; and then, (iii) recovering, drying and calcining said gelled particulates at a temperature of from 550.degree. to 1100.degree. C.Type: GrantFiled: February 26, 1980Date of Patent: February 16, 1982Assignee: Rhone-Poulenc IndustriesInventors: Gilbert Bouge, Roland Jacques, Regis Poisson, Laurent Seigneurin
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Patent number: 4273735Abstract: Spheroidal alumina shaped articles are prepared by dispersing an ungelled admixture of an alumina sol and hexamethylenetetramine, in the form of droplets, into a liquid forming medium which is but very slightly miscible with water, said medium being at a temperature of between about 50.degree. and 105.degree. C., next aging the alumina spheres thus shaped at a temperature greater than about 105.degree. C. at superatmospheric pressure, then secondarily aging said alumina spheres in a basic medium, and thence washing, drying and calcining said aged alumina spheres.The resultant shaped articles are useful, e.g., catalysts or catalyst carriers/supports.Type: GrantFiled: August 29, 1979Date of Patent: June 16, 1981Assignee: Rhone-Poulenc IndustriesInventors: Roland Jacques, Regis Poisson
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Patent number: 4061594Abstract: Alumina based bodies having resistance to temperatures of up to 1200.degree. C prepared by autoclaving alumina and at least one additive from the group of oxides of lanthanum, neodymium, praseodymium and thorium. Bodies of the alumina of this invention are useful in adsorption and catalysis.Type: GrantFiled: December 13, 1976Date of Patent: December 6, 1977Assignee: Rhone-Poulenc IndustriesInventors: Max Michel, Regis Poisson