S.a. Lhoist Recherche Et Developpement

S. A. Lhoist Recherche Et Developpment

Rheinkalk Gmbh

Marion Lorgouilloux

Marc Pelletier

Thierry Chopin

Philippe Dubois

Didier Lesueur

Fouad Laoutid

Robert Sebastian Gärtner

Olivier Nyssen

Alain Laudet

Christopher Pust

Arnd Pickbrenner

Leila Bonnaud

Olivier Francoisse

Mehdi Maazoun

Emanuelle Ligner

Matthias Rohmann

Stephan Chini

Heiszwolf Johan

Leïla Bonnaud

Lime-based sorbent suitable for use in a flue gas treatment process comprising at least 70 wt. % of Ca(OH)and at least 0.2 wt. % to at most 10 wt. % of a first additive selected among the group of hydrogels of natural or synthetic origin, in particular superabsorbent polymers (SAPs) or in the group of cellulose ethers or a combination thereof, premix for use in a manufacturing process of said sorbent, process for manufacturing the sorbent and use of said sorbent in a flue gas treatment process.

Lime-based sorbent for use in a flue gas treatment installation and process of manufacturing said lime-based sorbent

The present invention is related to a process for manufacturing a sorbent suitable for a use in a circulating dry scrubber device comprising the steps of: providing quicklime and water in an hydrator; slaking said quicklime via a non-wet route in the hydrator; collecting a lime based sorbent at an exit of the hydrator. The process is characterized in that it comprises a further step of adding at least a first additive comprising: a compound comprising silicon, and/or, a compound comprising aluminum, and/or a compound comprising silicon and aluminum before or during said slaking step, at a molar ratio between silicon or aluminum or a combination thereof and the calcium provided to said hydrator equal to or below 0.2 and equal to or above 0.02. In some other aspects, the present invention is related to a sorbent, a premix, and a flue gas treatment process.

Process for manufacturing a sorbent for a flue gas treatment process, sorbent and use of said sorbent in such flue gas treatment process

The present invention concerns a powdery slaked lime composition having an Alpine fluidity greater than 50% and including a first fraction of particles having a size less than 32 &#x3bc;m and a second fraction of particles with the size greater than 32 &#x3bc;m, the second fraction being less than 10% by weight, compared to the total weight of the composition. The invention also relates to a method for producing same.

Highly porous powdered slaked lime composition

The present invention relates to a method for producing a highly porous fine powdery slaked lime composition, comprising a fluidification step for forming said highly porous fine powdery slaked lime composition having an Alpine fluidity greater than 50% and which is carried out in a dryer/grinder chosen from the group consisting of a pin-type dryer/grinder, a cage-type dryer/grinder, an instantaneous dryer/disagglomerator and a combination of these until the powdery slaked lime composition has a non-solid residual-phase content of less than or equal to 3.5% by weight and greater than or equal to 0.3% by weight, as well as the product obtained therefrom.

Method for producing a highly porous fine powdered slaked lime composition, and product obtained therefrom

A method for producing a mixed calcium and magnesium compound comprising the slaking of quicklime with a magnesium hydroxide suspension, forming solid particles, said slaking by non-wet means forming said solid particles comprising a calcium phase and a magnesium phase intimately bonded to each other and of homogeneous volume distribution, and a mixed compound comprising a calcium phase and a magnesium phase.

Mixed calcium and magnesium compound and method for producing same

A mineral composition is shown which contains a mixed solid phase of synthetic calcium and magnesium carbonates, formed of a crystallized calcic portion and a plate-like crystallized magnesian portion. The crystals of the calcic portion and those of the magnesian portion are aggregated in the form of composite aggregates. These aggregates themselves are at least partly agglomerated in the form of agglomerates. The calcic portion has at least one carbonate such as calcite or the mixtures of calcite and aragonite. The magnesian portion contains hydromagnesite in plate-like form. The aggregates are further formed of a calcic core on which hydromagnesite plates are aggregated. The mineral composition has defined thermal conductivity properties making it suitable for use as a building material.

Mineral composition based on a mixed solid phase of calcium and magnesium carbonates and process for preparing such a composition

Process for manufacturing highly porous slake lime comprising a feeding step of quicklime, a feeding step of water in a feeding zone of a hydrator, a slaking step of said quicklime in a slaking zone of said hydrator and a maturation step in a maturation zone of said hydrator to form slaked lime.

Process for manufacturing highly porous slaked lime and product thereby obtained

Process for preparing a mineral composition based on a mixed solid phase of calcium and magnesium carbonates, comprising a preparation, in an aqueous phase, of a suspension of a solid phase containing at least one calcium compound selected from calcium hydroxide, calcium carbonate and mixtures thereof and at least one magnesium compound selected from magnesium oxide, magnesium hydroxide, at least partially hydrated dolomite, and mixtures thereof, the weight of said solid phase being between 5% and 15% of the total weight of the suspension, a carbonation of said solid phase in suspension by injecting a gas containing COinto said suspension that is heated at a temperature of 55&#xb0; C. to 90&#xb0; C., at a flow rate of COof 2.5 to 15 dm/min/kg of said solid phase of the suspension, with a reduction of the pH of the suspension to a value of less than 9 and with a stabilization of the electrical conductivity of the suspension, the carbonation being stopped as soon as this stabilization of electrical conductivity is observed.

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 crystallized calcium portion and a crystallized 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/m, and greater than or equal to 80 kg/m3, measured according to standard EN 459.2.

Mineral composition made from a mixed solid phase of calcium and magnesium carbonates, method of preparing same and use thereof

A flame-retardant polymer composition comprising a mineral filler and a polymer, said mineral filler comprising a calcium compound, characterized in that the calcium compound is a fire-resistant additive in the form of calcium hydroxide, having a specific surface calculated according to the BET method greater than 25 m/g, preferably greater than 30 m2/g, more preferably greater than 35 m2/g and advantageously greater than 40 m2/g, uses of same and the combustion residue obtained.

Flame-retardant and fire-resistant polymer compositions made from lime having a high specific surface

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.

Flame-retardant and fire-resistant polymer compositions made from lime

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.

Method for the dry slaking of calcium and magnesium oxides from calcomagnesian compounds

A method is shown for the slaking of calcium oxides and magnesium from calcomagnesian compound containing at least 10 wt. % of MgO in relation to the total weight of said calcomagnesian compound, in which a slaking aqueous phase is supplied to a slaking device, and slaking the compound containing anhydrous dolomite delivered to the slaking device, by means of the slaking aqueous phase, forming hydrated solid particles of Mg(OH), in the presence of an additive.

Method for the wet slaking of calcium and magnesium oxides from calcomagnesian compounds

A powdery mineral filler comprising a calcium compound and a magnesium compound, comprising a semi-hydrated dolomite of general formula aCaCO.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.

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Strepy Bracquegnies, Belgium

Marion Lorgouilloux