Patents by Inventor Jean-Marc Rousseaux
Jean-Marc Rousseaux 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: 10494280Abstract: A process is disclosed for treating a Bayer process waste comprising a slurry containing bauxite residue and dissolved aluminum. The process comprises supplying the waste to a settling area to cause the bauxite residue to settle out of the slurry, thereby producing a supernatant liquor. The process further comprises neutralizing the supernatant liquor with a solution containing magnesium and calcium to produce a neutralized slurry containing precipitated hydrotalcites and thickening the neutralized slurry to produce a clarified effluent and a compacted slurry containing the precipitated hydrotalcites, part of said compacted slurry being recirculated to the supernatant liquor to be neutralized and/or directly to the neutralizing step. The clarified effluent and the compacted slurry are disposed of separately. Also disclosed is a plant for treating a Bayer process waste.Type: GrantFiled: October 21, 2013Date of Patent: December 3, 2019Assignee: Rio Tinto Alcan International LimitedInventors: John Victor Anderson, Jean-Marc Rousseaux, Guy Peloquin, Ben O'Brien
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Publication number: 20150284278Abstract: A process is disclosed for treating a Bayer process waste comprising a slurry containing bauxite residue and dissolved aluminium. The process comprises supplying the waste to a settling area to cause the bauxite residue to settle out of the slurry, thereby producing a supernatant liquor. The process further comprises neutralizing the supernatant liquor with a solution containing magnesium and calcium to produce a neutralized slurry containing precipitated hydrotalcites and thickening the neutralized slurry to produce a clarified effluent and a compacted slurry containing the precipitated hydrotalcites, part of said compacted slurry being recirculated to the supernatant liquor to be neutralized and/or directly to the neutralizing step The clarified effluent and the compacted slurry are disposed of separately. Also disclosed is a plant for treating a Bayer process waste.Type: ApplicationFiled: October 21, 2013Publication date: October 8, 2015Inventors: John Victor Anderson, Jean-Marc Rousseaux, Guy Peloquin, Ben O'Brien
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Patent number: 9090413Abstract: Device for transporting powder comprising a conveyer, which includes a lower channel in which a gas circulates, and an upper channel, designed for the circulation of powder and said gas, said lower channel and said upper channel being separated by a porous wall that said gas can pass through, the lower channel being supplied with gas at a pressure allowing the potential fluidization of said powder in said upper channel, said upper channel being provided in its upper part with transverse walls placed so that they delimit with the upper wall of said upper channel at least one upper zone in which a gas bubble under pressure is formed as a result of putting said air chute under potential fluidization pressure. At the level of at least one bubble so formed, the wall of the upper channel includes a means of removal for fluidization gas provided with a means of creating pressure drop, which creates a substantially constant pressure drop.Type: GrantFiled: October 19, 2010Date of Patent: July 28, 2015Assignee: Rio Tinto Alcan International LimitedInventors: Geoffrey Petit, Mehrdji Hemati, Jean-Marc Rousseaux
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Patent number: 8425159Abstract: A process for transporting a powder material, in which a device is fitted between a supply zone and a zone to be supplied, the device including at least one substantially horizontal conveyor which includes a lower duct and an upper duct being separated by a porous wall, the upper duct provided with a balancing column. The upper duct is filled with powder material and the lower duct is supplied with gas at a pressure that allows the potential fluidization of the powder material in the upper duct. The minimal bubbling speed, which corresponds to the maximum void fraction, is determined and the fluidization pressure is set to a value such that the fluidization speed of the gas is between 0.8 and 1.5 times the minimal bubbling speed, preferably between 0.9 and 1.3 times the minimal bubbling speed.Type: GrantFiled: June 26, 2008Date of Patent: April 23, 2013Assignee: Rio Tinto Alcan International LimitedInventors: Raymond Roumieu, Mehrdji Hemati, Cécile Plais, Jean-Marc Rousseaux, Christian Cloue
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Publication number: 20120230778Abstract: Device for transporting powder comprising a conveyer, which includes a lower channel in which a gas circulates, and an upper channel, designed for the circulation of powder and said gas, said lower channel and said upper channel being separated by a porous wall that said gas can pass through, the lower channel being supplied with gas at a pressure allowing the potential fluidization of said powder in said upper channel, said upper channel being provided in its upper part with transverse walls placed so that they delimit with the upper wall of said upper channel at least one upper zone in which a gas bubble under pressure is formed as a result of putting said air chute under potential fluidization pressure. At the level of at least one bubble so formed, the wall of the upper channel includes a means of removal for fluidization gas provided with a means of creating pressure drop, which creates a substantially constant pressure drop.Type: ApplicationFiled: October 19, 2010Publication date: September 13, 2012Applicant: RIO TINTO ALCAN INTERNATIONAL LIMITEDInventors: Geoffrey Petit, Mehrdji Hemati, Jean-Marc Rousseaux
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Patent number: 7807119Abstract: A process for the production of alumina trihydrate by alkaline digestion of bauxite using the Bayer process in which aluminate liquor and insoluble residues are separated using a solid/liquid separation device (E; W2; DC) characterised in that the said slurry (21a; 41; 230?) is at least partially passed through a hydrocyclone (H1; H21; H22; H3) to improve and accelerate the separation of the sodium aluminate liquor from the insoluble residues in the slurry (21a; 41; 230?) containing the said liquor and the said residues and that supplies or is derived from the said liquid-solid separation device. In a first embodiment, at least one hydrocyclone is used at the upstream side of the settler-thickener, as clarifier of the pregnant liquor. In a second embodiment, at least one hydrocyclone is used as a thickener of insoluble residue mud. In a third embodiment, a hydrocyclone is used in combination with the causticisation settler.Type: GrantFiled: September 19, 2005Date of Patent: October 5, 2010Assignee: Aluminium PechineyInventors: Jean-Marc Rousseaux, Gerard Pignol, Yves Magnan
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Publication number: 20100189518Abstract: A process making it possible to transport by potential fluidization, a powder material, in which a device is fitted between the supply zone, typically a storage zone for said powder material, and the zone to be supplied, said device including at least one substantially horizontal conveyor, called an “air chute”, which includes a lower duct designed for the circulation of a gas and an upper duct designed for the circulation of the powder material, said lower duct and said upper duct being separated by a porous wall that said gas can pass through, a process in which the upper duct is filled with said powder material and the lower duct is supplied with gas at a pressure that allows the potential fluidization of said powder material in said upper duct said upper duct being provided with at least one balancing column.Type: ApplicationFiled: June 26, 2008Publication date: July 29, 2010Applicant: ALCAN INTERNATIONAL LIMITEDInventors: Raymond Roumieu, Mehrdji Hemati, Cécile Plais, Jean-Marc Rousseaux, Christian Cloue
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Publication number: 20070243118Abstract: A process for the production of alumina trihydrate by alkaline digestion of bauxite using the Bayer process in which aluminate liquor and insoluble residues are separated using a solid/liquid separation device (E; W2; DC) characterised in that the said slurry (21a; 41; 230?) is at least partially passed through a hydrocyclone (H1; H21; H22; H3) to improve and accelerate the separation of the sodium aluminate liquor from the insoluble residues in the slurry (21a; 41; 230?) containing the said liquor and the said residues and that supplies or is derived from the said liquid—solid separation device. In a first embodiment, at least one hydrocyclone is used at the upstream side of the settler—thickener, as clarifier of the pregnant liquor. In a second embodiment, at least one hydrocyclone is used as a thickener of insoluble residue mud. In a third embodiment, a hydrocyclone is used in combination with the causticisation settler.Type: ApplicationFiled: September 19, 2005Publication date: October 18, 2007Applicant: ALUMINIUM PECHINEYInventors: Jean-Marc Rousseaux, Gerard Pignol, Yves Magnan