Rhodia Operations

Cyril Chomette

Cédric Boivin

Thomas Chaussee

Frédéric Colbeau-justin

Laurent Guy

Valérie Buissette

Marc-David Braida

Thierry Le Mercier

Fabien Stocklouser

A precipitated silica having large particle size for use in tire applications. In particular, a precipitated silica characterised by a CTAB surface area Sequal to or greater than 160 m/g; a median particle size d50, measured by centrifugal sedimentation, such that|50|>25000/||  (I) wherein |d50| represents the numerical value of the median particle size d50 measured by centrifugal sedimentation and expressed in nm and |S| represents the numerical value of the CTAB surface area Sexpressed in m/g; and an aluminium content not exceeding 4500 ppm.

Precipitated silica and process for its manufacture

A precipitated silica for use in tire applications. In particular, a precipitated silica characterised by a CTAB surface area Sgreater than 140 m/g; a width of the aggregate size distribution Ld, measured by centrifugal sedimentation, of at least 1.2; a pH of less than 5.5; and a carbon content of less than 1500 ppm.

Precipitated silica with improved processing properties

The present invention relates to a process for preparing an ammonium vanadium phosphate of formula (NH)(VO)(HPO). It also relates to a process for preparing a vanadium orthophosphate VPO.

Method for preparing a vanadium phosphate

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Mérignac, France

Cyril Chomette