Patents Assigned to S. A. Lhoist Recherche et Developpement
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Patent number: 9738772Abstract: A mineral filler in a flame-retardant organic polymer composition comprising a calcium compound for a fire-resistant effect characterized in that said calcium compound comprises at least calcium hydroxide, use of same and the combustion residue obtained therefrom, and polymer sheaths for electrical cables containing the mineral filler in the flame-retardant polymer composition.Type: GrantFiled: July 12, 2013Date of Patent: August 22, 2017Assignee: S.A. Lhoist Recherche et DeveloppementInventors: Marion Lorgouilloux, Didier Lesueur, Philippe Dubois, Fouad Laoutid, Leila Bonnaud
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Patent number: 9725360Abstract: The invention relates to a method for the dry slaking of calcium oxides and magnesium from calcomagnesian compound containing preferably at least 10 wt. % of MgO in relation to the total weight of said calcomagnesian compound, in which calcomagnesian compound is supplied to a slaking vessel, a slaking aqueous phase is supplied to the slaking vessel, followed by slaking the calcomagnesian compound delivered to the slaking vessel, by means of the slaking aqueous phase, and forming hydrated solid particles of calcium hydroxides and magnesium, in the presence of an additive. The invention also relates to the compound produced in this way.Type: GrantFiled: February 18, 2014Date of Patent: August 8, 2017Assignee: S.A. Lhoist Recherche et DeveloppementInventors: Robert Sebastian Gärtner, Marion Lorgouilloux
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Patent number: 9579601Abstract: A method for treating a gas is shown which includes the steps of: injecting a powdered compound into the gas line, injecting an aqueous phase in droplet form into the line, capturing pollutants from the gases, and recovering the powdered compound separately. The step for injecting an aqueous phase in droplet form is done so as to moisten those particles of powdered compound in the gas line, when they are injected.Type: GrantFiled: June 20, 2014Date of Patent: February 28, 2017Assignee: S. A. Lhoist Recherche et DeveloppementInventors: Xavier Pettiau, Olivier Nyssen, Alain Brasseur, Alain Laudet
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Patent number: 9511340Abstract: An aqueous calco-magnesian suspension comprising solid particles fitting the general formula a Ca(OH)2.b Mg(OH)2.c MgO in an aqueous phase at a concentration greater than or equal to 200 g/kg, wherein a, b and c represent mass fractions, the sum of which has a value from 90 to 100% and an additive which is simultaneously a viscosity reducer and a viscosity increase moderator, wherein said additive is a phosphonate or a phosphonic acid.Type: GrantFiled: October 25, 2013Date of Patent: December 6, 2016Assignee: S.A. Lhoist Recherche et DeveloppementInventor: Bernard Laurent
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Patent number: 9365696Abstract: A powdery mineral filler comprising a calcium compound and a magnesium compound, comprising a semi-hydrated dolomite of general formula aCaCO3.bCa(OH)2.cMg(OH)2.dMg0.eCaO, a, b, c, d and e being molar fractions with (a+b+e)/(c+d) between 0.8 and 1.2, and comprising particle agglomerates, a flame-retardant polymer composition containing same, production methods and use of such mineral fillers.Type: GrantFiled: July 12, 2013Date of Patent: June 14, 2016Assignee: S.A. LHOIST RECHERCHE et DEVELOPPEMENTInventors: Marion Lorgouilloux, Didier Lesueur, Thierry Chopin, Fouad Laoutid, Philippe Dubois
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Publication number: 20150258519Abstract: An aqueous calco-magnesian suspension comprising solid particles fitting the general formula a Ca(OH)2.b Mg(OH)2.c MgO in an aqueous phase at a concentration greater than or equal to 200 g/kg, wherein a, b and c represent mass fractions, the sum of which has a value from 90 to 100% and an additive which is simultaneously a viscosity reducer and a viscosity increase moderator, wherein said additive is a phosphonate or a phosphonic acid.Type: ApplicationFiled: October 25, 2013Publication date: September 17, 2015Applicant: S.A. Lhoist Recherche et DeveloppementInventor: Bernard Laurent
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Publication number: 20150210580Abstract: Composition for conditioning sludge, comprising a mineral compound that is lime and an organic compound that is a cationic organic coagulant having an average molecular weight less than or equal to 5 million g/mol and greater than or equal to 20,000 g/mol, the said cationic organic coagulant being chosen from the group of linear or branched polymers based on diallyldialkyl ammonium salts.Type: ApplicationFiled: April 7, 2014Publication date: July 30, 2015Applicant: S. A. Lhoist Recherche et DeveloppementInventors: Laurent Biotteau, Gaetan Blandin, Hubert Charbonnier, Tamer Ozturk
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Publication number: 20150044469Abstract: A mineral composition made from a mixed solid phase of calcium and magnesium carbonates, method of preparing same and use thereof. A mineral composition made from a mixed solid phase of calcium and magnesium carbonates, formed from a crystallised calcium portion and a crystallised magnesium portion in the form of platelets, the crystals of the calcium portion and those of the magnesium portion being aggregated in the form of composite aggregates, said aggregates themselves being at least partially agglomerated, said calcium portion comprising at least one carbonate chosen from the group consisting of calcite, aragonite and the mixtures thereof, said magnesium portion comprising hydromagnesite in platelet form, said mixed solid phase having a bulk density less than or equal to 250 kg/m3, and greater than or equal to 80 kg/m3, measured according to standard EN 459.2.Type: ApplicationFiled: March 22, 2013Publication date: February 12, 2015Applicant: S.A. Lhoist Recherche et DeveloppementInventors: Marion Lorgouilloux, Robert Sebastian Gartner, Marc Pelletier, Thierry Chopin
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Patent number: 8871006Abstract: The invention relates to a solid mineral composition of heavy metals, in particular mercury, in flue gas, to a method for preparing such a solid mineral compound and to the use thereof for reducing heavy metals, in particular mercury, in flue gas, by placing the flue gas in contact with the solid mineral composition.Type: GrantFiled: July 13, 2010Date of Patent: October 28, 2014Assignee: S. A. Lhoist Recherche et DeveloppementInventors: Alain Brasseur, Jean-Paul Pirard, Alain Laudet
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Publication number: 20140217034Abstract: Composition for conditioning sludge, comprising a mineral compound that is lime and an organic compound that is a cationic organic coagulant having an average molecular weight less than or equal to 5 million g/mol and greater than or equal to 20,000 g/mol, the said cationic organic coagulant being chosen from the group of linear or branched polymers based on diallyldialkyl ammonium salts.Type: ApplicationFiled: April 7, 2014Publication date: August 7, 2014Applicant: S. A. Lhoist Recherche et DeveloppementInventors: Laurent Biotteau, Gaetan Blandin, Hubert Charbonnier, Tamer Ozturk
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Patent number: 8771633Abstract: A composition based on lime comprising at least one mineral agent consisting of slaked lime in the solid phase and of an organic polymer incorporated into said solid phase, a method for its making and the use for its application in the treatment of water and sludge, in particular for conditioning sludge before dewatering.Type: GrantFiled: June 29, 2010Date of Patent: July 8, 2014Assignees: S.A. Lhoist Recherche et Developpement, SNF S.A.S.Inventors: Laurent Biotteau, Gaetan Blandin
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Patent number: 8206680Abstract: Calco-magnesian aqueous suspension having particles of solid matter with, before being put into suspension, a specific surface area, calculated according to the BET method, which is less than or equal to 10 m2/g, and its method of preparation. Such an aqueous suspension of calco-magnesian solid matter can achieve a very low viscosity, making it possible to greatly increase the solid matter concentration of the suspension, or again to reduce the size of the particles in suspension, thus obtaining a concentrated and reactive milk of lime.Type: GrantFiled: July 27, 2004Date of Patent: June 26, 2012Assignee: S.A. Lhoist Recherche et DeveloppementInventors: Luis Alfredo Diaz Chavez, Timothy L. Salter, Ziad Habib, Henri-René Langelin
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Publication number: 20120152854Abstract: This invention relates to a method for processing sludge involving the addition of a lime-based basic agent to a sludge having a first pH value in order to raise the pH to a second value higher than the first one, adding at least one anionic organic flocculating agent that is active at the second pH value, flocculating the sludge, and separating the flocculated sludge between dehydrated sludge and a liquid phase.Type: ApplicationFiled: February 13, 2012Publication date: June 21, 2012Applicant: S. A. Lhoist Recherche et DeveloppementInventor: Marc Remy
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Patent number: 8147703Abstract: The invention relates to a method for processing sludge, comprising the addition of a lime-based basic agent to a sludge having a first pH value in order to raise the pH to a second value higher than the first one, adding at least one anionic organic flocculating agent that is active at said second pH value, flocculating the sludge, and separating the flocculated sludge between dehydrated sludge and a liquid phase, wherein the sludge to be dehydrated has a first above-mentioned pH value lower than 9, while the lime-based basic agent induces said pH raise to said above-mentioned second value within less than 5 minutes. The invention also relates to a composition for implementing said processing.Type: GrantFiled: November 13, 2007Date of Patent: April 3, 2012Assignee: S.A. Lhoist Recherche et DeveloppementInventor: Marc Joseph Henri Remy
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Patent number: 8048217Abstract: The invention relates to a powder composition based on a calcium/magnésium compound having formula (I), xCaA.(1?x)[yMgA+(1?y)MgO], in which A is a group ?(OH)2 or ?CO3 and x and y are mole fractions where 0<x=1 and 0=y=1, containing an amount of mineral solid flow agent that is less than 5 wt.-% of the composition, said agent being selected from the group containing vermiculite, perlite, diatomaceous earth and silica, in the form of particles having a size greater than 90 ?m.Type: GrantFiled: December 14, 2004Date of Patent: November 1, 2011Assignee: S. A.Lhoist Recherche et DeveloppementInventors: Amandine Gambin, Alain Laudet, Olivier Francoisse
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Patent number: 7918627Abstract: A method for treating soils, in particular water-sensitive dry soils, comprising burying a treatment liquid, optionally loaded with a suspended material into trenches and a device for implementing the method. The device comprises a transportable chassis (2), a reservoir and hollow dispensing tines (1). The dispensing tines comprise a vertical supporting portion (3) which connects the dispensing tines (1) to the chassis and a horizontal share portion (4), including a spike (5) prior to penetrating into the soil, and a rear dispenser (6).Type: GrantFiled: February 20, 2006Date of Patent: April 5, 2011Assignee: S.A. Lhoist Recherche et DeveloppementInventor: Claude Joly
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Patent number: 7744678Abstract: Powdered lime composition having a BET specific surface area that is equal to or greater than 25 m2/g and a BJH total pore volume obtained from nitrogen desorption that is equal to or greater than 0.1 cm3/g, and furthermore comprising an alkali metal. The alkali metal content is equal to or greater than 0.2% and equal to or less than 3.5% based on the total weight of the composition. There is also described a method of preparing the composition and use thereof to reduce flue gases.Type: GrantFiled: June 26, 2006Date of Patent: June 29, 2010Assignee: S.A. Lhoist Recherche et DeveloppementInventors: Alain Laudet, Amandine Gambin
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Patent number: 7740196Abstract: Device for implementing a method of granulating slag fines including a conveyable removable platform (1) on which there are arranged at least one device for the selective obtaining of fines (10) upstream of a feed hopper (5), a granulator (2) fed with the fines by the feed hopper (5), a storage reservoir (9) for a granulation aqueous phase feeding of the granulator (2) with the aqueous phase, a power source (4) and a monitor and controller (3) for producing granules from the fines.Type: GrantFiled: June 21, 2005Date of Patent: June 22, 2010Assignee: S.A. Lhoist Recherche et DeveloppementInventor: Etienne Van Tichelen
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Patent number: 7628925Abstract: The invention concerns a method for dehydrating sludge, comprising adding a basic agent to sludge having a pH not more than 8, adding to the sludge at least one organic flocculating constituent, by adding said basic agent, increasing the sludge pH to a value not more than a pH at which occurs degradation of said at least one organic constituent, flocculating the sludge and separating in the flocculated sludge dehydrated sludge from a liquid phase, said basic agent being a magnesian limestone compound of formula xCaCO3,(1?x)[yMg(OH)2+(1?Y) MgO], wherein 0,45:=x=0,75, and 0=y=, the treated sludge having, until after said separation, said value less than a pH at which occurs degradation of said at least one organic constituent.Type: GrantFiled: July 8, 2004Date of Patent: December 8, 2009Assignee: S.A Lhoist Recherche et DeveloppementInventors: Marc Remy, Eric Judenne, Matthias Rohmann
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Patent number: 6803105Abstract: The invention concerns a product based on calcium oxide in the form of rough grains, comprising a protective film coating the grains, based on at least a film-forming compound, which is solid at room temperature and which, when applied on the grains, is in solution or in emulsion in a vaporable aqueous phase. The invention also concerns a method for making said product.Type: GrantFiled: June 7, 2002Date of Patent: October 12, 2004Assignee: S. A. Lhoist Recherche et DeveloppementInventors: Alain Laudet, Erwan Gueguen