Akzo Nobel N.v.

Akzo N.v.

Akzo Nobel Chemicals International B.v.

John Douglas Nowak

Jeffrey E Telschow

Elliot I Band

James F Gadberry

Jian Zhou

Paul Albert Iacobucci

Phuong-Nga Trinh

Xiaoyu Wang

Maurice O Dery

Claude B Peterson

William Francis Joyce

Michael Engel

Harold Providence

Garry J Garvey

Sandra Urquhart

Biing Ming Su

Michael J Engel

The present invention generally relates to a viscoelastic fluids, thickened acid compositions and the like and to methods of using said gelled compositions. The thickened compositions of the present invention can usefully be employed in methods of stimulating and/or modifying the permeability of underground formations, in drilling fluids, completion fluids, workover fluids, acidizing fluids, fracturing, gravel packing and the like.

Thickened viscoelastic fluids and uses thereof

The present invention relates to a process for the minimization of volatile organic sulphur byproducts in dimethyl sulfate quaternization of amines made with hypophosphorous acid, which leads to the formation of an odor stable product.

Minimization of volatile organic sulphur byproducts in dimethyl sulfate quaternization of amines made with hypophorous acid

Particulate ceramic precursor gel compositions (e.g., particulate silica gel) are formed by mechanically extruding a substantially monolithic, substantially undried ceramic precursor. gel through a screen using a mechanical force which is supplied substantially normal to the plane of the screen to directly form the particulate composition, collecting the extrudate in a substantially non-stacked configuration, and drying the extrudate, e.g., in a dryer without imposition of strong vacuum when the extrudate is in substantially nonlayered configuration, to substantially maintain its particle morphology.

Extrusion, collection, and drying of ceramic precursor gel to form dried

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Yonkers, NY, United States of America

John Douglas Nowak