Rhodia Operations

S.a. Lhoist Recherche Et Developpement

Clarkson University—division Of Research

Clarkson University

Magnesium Elektron, Inc.

Guillaume Criniere

Mathias Destarac

Suryadevara Vijayakumar Babu

Olivier Larcher

Emmanuel Rohart

Michael Nispel

Simon Ifrah

Stephan Verdier

Rui Jorge Coelho Marques

Claire Pitois

Laurent Thiers

Robert Sebastian Gärtner

Deborah Jayne Harris

Thierry Chopin

David Lyons

Eric Perrin

Deborah Ballard

Narahari N Kramadhati

Pradeepa Dandu

Vamsi K Devarapalli

Gaetan Blandin

Heather Bradshaw

Jose Noldin

Mickey L Dixon, Jr

Clive Butler

Mairead Feeley

Jr Mickey L Dixon

Thierry Lucion

Jens Emmerich

José Noldin

The present invention is related to an installation and to a method for recirculating and mixing a fluid which is preferably a shear-thinning fluid. The installation comprises a tank, a pump, a piping assembly connected to the pump and comprising an injection piping for injecting said fluid into the tank and a return piping coupled to the injection piping for pumping the said fluid from the tank to the injection piping, wherein the piping assembly and the tank form a flow recirculation path in which fluid is homogenized by recirculation of the fluid upon action of the said pump, the injection piping being designed such as to reinject the fluid in at least two peripheral bottom locations with an horizontal and/or inclined orientation such as to create a swirl movement in the tank and to reinject simultaneously said fluid upwardly through a central location in a zone comprised between the central axis of the tank and the half radius of the tank such as to create a jet of fluid having a main vertical component.

Method and installation for homogenizing a shear thinning fluid contained in a cylindrical tank

A method for manufacturing green or thermally treated briquettes which are made up of at least one quick calcium-magnesium compound that is an iron-based compound. The method includes the steps of supplying a homogeneous pulverulent mixture to a roller press, the press having pockets where the pulverulent mixture is compressed to form the green briquettes. The rollers of the roller press develop linear speeds at the periphery of the rollers between 10 and 100 cm/s and linear pressures between 60 and 160 kN/cm. The method can also include a thermal treatment of the green briquettes to produce fired briquettes containing calcium ferrite, the briquettes having a Shatter Test Index less than 8%, and a porosity value greater than or equal to 30%.

Method for manufacturing briquettes containing a calcium-magnesium compound and an iron-based compound, and briquettes thus obtained

Process for manufacturing a milk of lime of great fineness comprising at least the steps of providing one lime compound and forming said milk of lime with a process water and said lime compound.

Process for manufacturing a milk of slaked lime of great fineness and milk of lime of great fineness thereby obtained with process water

Composition in the form of green or thermally treated briquettes comprising at least one 'quick' calcium-magnesium compound and an iron-based compound, the method of production thereof and uses thereof.

Thermally treated briquettes containing a 'quick' calcium-magnesium compound and calcium ferrites, and method of manufacture thereof

Process for dephosphorization of molten metal during a refining process using a lime composition in the form of compacted particles having a Shatter Test Index of less than 20%, leading to a refined metal reduced in phosphorus components to the extent that the refined metal reduced in phosphorus is showing a phosphorus content lower than 0.02 w % based on the total weight of the refined metal reduced in phosphorus.

Process for dephosphorization of molten metal during a refining process

A composition based on quick calcium-magnesium compounds in the form of briquettes is shown, as well as a method for the preparation and use thereof. The composition of the briquettes contains quicklime in the form of milled particles at a concentration of at least 10% by weight and at most 100% by weight relative to the weight of the composition. The compositions in the form of briquettes have a Shatter test index of less than 10%.

Composition in the form of briquettes comprising burnt calcium-magnesium compounds, method for obtaining same, and use thereof

The invention relates to a suspension of cerium oxide particles, of which the particles (secondary particles) have an average size of at most 200 nm, these secondary particles consisting of primary particles whose average size measured by TEM is of at most 150 nm with a standard deviation of at most 30% of the value of said average size, and for which the ratio of the average size measured by TEM to the average size measured by BET is at least 1.5. This suspension is prepared from a solution of a cerium III salt, comprising a colloidal dispersion of cerium IV, which is brought into contact, in the presence of nitrate ions and under an inert atmosphere, with a base; the medium obtained is subjected to a thermal treatment under an inert atmosphere and then acidified and washed. The suspension can be used for polishing.

Liquid suspensions and powders of cerium oxide particles and preparation and polishing applications thereof

Suspensions of cerium oxide particles, well suited for polishing applications, the particles (secondary particles) of which have an average size of at most 200 nm, these secondary particles are formed from primary particles whose average size measured by TEM is at most 150 nm with a standard deviation of at most 30% of the value of this average size, and for which the ratio of the average size measured by TEM to the average size measured by BET is at least 1.5. Such suspensions are prepared from solutions of a cerium III salt, comprising a colloidal dispersion of cerium IV, which are contacted, in the presence of nitrate ions and under an inert atmosphere, with a base, and the medium obtained is subjected to a thermal treatment under an inert atmosphere and then acidified and washed.

A colloidal dispersion for chemical mechanical polishing comprising: (a) an abrasive component; and (b) from about 0.05% to about 10% by weight of the abrasive component, a water-soluble amphoteric polymer comprising at least one macromolecular chain B and a part A bonded to a single end of the at least one macromolecular chain B, wherein the macromolecular chain B is derived from one or more ethylenically unsaturated monomers having quaternary ammonium groups or inium groups, and wherein the part A is a polymeric or nonpolymeric group comprising at least one anionic group; wherein the dispersion has a pH of between about 1.5 and about 6. The colloidal dispersion is capable of polishing a substrate comprising silicon nitride and silicon oxide with a reverse selectivity ratio of at least about 27, typically at least 50 the reverse selectivity ratio being the ratio of the rate of removal of the silicon nitride to the rate of removal of the silicon oxide.

Abrasive compositions for chemical mechanical polishing and methods for using same

Catalyst compositions include finely divided nanoscale particles of at least one supported oxide selected from among zirconium oxide, titanium oxide or a mixed zirconium/titanium oxide deposited onto an alumina-based or aluminum-oxyhydroxide-based support, wherein, after calcination for 4 hours at 900&#xb0; C., the at least one support oxide is in the form of nanoscale particles deposited onto the support, the size of said particles being at most 10 nm when the at least one supported oxide is based is zirconium oxide and being at most 15 nm when the at least one supported oxide is titanium oxide or a mixed zirconium/titanium oxide; such catalyst compositions are especially useful for the selective reduction of NOx.

Catalyst compositions based on nanoparticles of a zirconium oxide, a titanium oxide or a mixed zirconium/titanium oxide deposited onto an alumina or aluminum oxyhydroxide support therefor

Catalyst compositions include finely divided nanoscale particles of at least one supported oxide, based on a zirconium oxide, a titanium oxide or a mixed zirconium/titanium oxide deposited onto a silica based support, wherein, after calcination for 4 hours at 900&#xb0; C., the supported oxide is in the form of nanoscale particles deposited onto the support, the size of the particles being at most 5 nm when the at least one supported oxide is based on a zirconium oxide, being at most 10 nm when the at least one supported oxide is based on a titanium oxide and being at most 8 nm when the at least one supported oxide is based on a mixed zirconium/titanium oxide; such catalyst compositions are especially useful for the selective reduction of NOx.

Catalyst compositions based on nanoparticles of a zirconium oxide, a titanium oxide or a mixed zirconium/titanium oxide deposited onto a silica support therefor

Suspensions of cerium oxide particles in which the particles (secondary particles) have an average size not exceeding 200 nm, such secondary particles being comprised of primary particles having an average size not exceeding 100 nm with a standard deviation having a value not exceeding 30% of the value of this average size, are prepared from a solution of a cerium-III salt, including cerium IV or hydrogen peroxide, which is contacted with a base in the presence of nitrate ions and in an inert atmosphere; the medium thus obtained is subjected to a thermal processing in an inert atmosphere, then acidified and scrubbed and the powder is obtained by drying and calcining of the suspension, which suspension and powder are useful for polishing applications.

Liquid suspensions and powders of cerium oxide particles and polishing applications thereof

Colloidal dispersions of inorganic particles in a liquid phase include ampholytic copolymers containing at least one macromolecular chain B and a moiety A bonded to a single end thereof and in which the macromolecular chain B includes cationic units Bc, deriving from cationic monomers Bc and the moiety A is a polymeric or non-polymeric group containing at least one anionic or potentially anionic group; such dispersions may have a positive zeta potential within a pH ranging from 1 to 11.

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Ixelles, Belgium

Guillaume Criniere