Pq Corporation

Philadelphia Quartz Company

Shell Oil Comapny

Pq Holding, Inc.

Elliot P Hertzenberg

Howard S Sherry

David Allen Cooper

John R McLaughlin

M Robert Derolf

Anthony L Dent

Thomas C Campbell

Brendan Dermot Murray

William Edward Cormier

Bruce H Winquist

Gary M Pasquale

Bonita K Marcus

David I Netting

Richard Hinchey

Thomas W Hastings

Irwin Jerry Itzkovitch

Ivan H Joyce

Sabbat J Strianse

Raymond P Denkewicz

David A Cooper

Theodorus L M Maesen

A hydrophobic zeolite is prepared having high Hydrophobicity Index number by calcining a zeolite with steam under turbulent condition with respect to flow pattern of the zeolite and at a temperature within the range of 650-1000&deg; C.

Process for preparing a modified zeolite

The mesopore volume in pores of diameters ranging from 2 to 60 nm of zeolite Y materials is increased by the hydrothermal treatment of such zeolites at temperatures above the atmospheric boiling point of the treating solution. Unique zeolites are produced as result of such process.

Process for preparing zeolite Y with increased mesopore volume

Y-type zeolites with unit cell constants of less than 24.14 .ANG. are prepared by improving the method of dealumination and aluminum ion exchange. Zeolites with such low unit cell constants have not been known previously.

Stable zeolite of low unit cell constant and method of making same

The instant invention comprises a process for concurrently dealuminating and ion exchanging an acid stable sodium ion-containing zeolite by contacting the zeolite with an about 0.5 M to about 3 M nitric acid solution containing ammonium nitrate in an amount sufficient to fully exchange the sodium ions for ammonium and hydrogen ions at a temperature of at least about -10.degree. C. The instant invention also relates to the zeolites thus prepared by the instant process and catalysts prepared utilizing these zeolites.

Process for the dealumination and ion exchange of zeolites

Self-warming personal care products such as lotions, creams and pastes can be prepared using Zeolite A that contains both sodium and potassium.

Zeolite for personal care products

Porous granules that contain separate particles of alkali metal silicate and zeolite are stable and are efficient ion exchangers in aqueous effluents and/or solutions. Said granules are heated to provide the stability required so that even though some silicate may dissolve when the granules are exposed to water, the zeolite does not disperse throughout the water.

Porous zeolite granules stable in aqueous solutions

Inorganic chill-proofing and other agents that are used to process stable beer often contain metals such as iron and copper that are soluble in beer or other beverages. A small addition of magnesium silicate added to said chill-proofing agents, particularly silica hydrogel, substantially averts metal contamination in the beer.

Composition for treating beer to prevent chill haze and metal

Treating beer to prevent chill haze and metal contamination

A combination of an acidic functional polymer and zeolite and/or amorphous alumino silicate provides a gel suitable as a cosmetic vehicle plus supplying functionality as well. The components combine easily to provide a creamy gel that is compounded with other ingredients to provide the complete cosmetic composition. The zeolite or amorphous alumino silicate is present in a sufficient quantity to provide functionality as well as the desired rheology. The combination can be used to compound astringent creams or lotions, make-up bases, facial masks, deodorant compositions, antiperspirants, anti-acne compositions, wrinkle smoothers or erasers, pore minimizers, and body lotions. An especially useful zeolite or amorphous alumino silicate is a material that contains aluminum as the cation.

Cosmetic vehicle

Crystalline alumino-silicates (zeolites) are multifunctional in dentifrice compositions thereby reducing the number of components required in such formulations. The pH-adjusted zeolites can keep the pH of the dentifrice in the range where caries formation is impossible. The pH-adjusted synthetic or natural zeolites can be prepared or obtained in a particle size range that provides both abrasive cleansing and polishing or lustering of the teeth. The fine particle size and water absorbing capabilities of the zeolite can also provide thickening. Such multifunctional performance allows considerable simplification in the formulation of dentrifice compositions.

Toothpaste containing pH-adjusted zeolite

Silicas that provide improved abrasive action when incorporated in dentifrice compositions can be prepared by dehydrating a silica hydrogel to a low water content and then reintroducing water to gel. The silica hydrogel is prepared by neutralizing a sodium silicate with an acid. This hydrogel is dried by any convenient method so that the gel contains about 15% water or less. This dried gel is rehydrated to about 30% or more. The rehydrated gel provides improved abrasion values over the prior art xerogels and hydrogels.

Rehydrated silica gel dentifrice abrasive

Silane-Zeolite composites are incorporated into phosphate free detergents as builders. The use of such composites allows compositional improvements and results in certain process advantages when compared to detergents utilizing plain zeolites as phosphate replacements. Hydrated zeolites which have been treated with functionally hydrophilic silanes do not agglomerate during incorporation into detergents. In addition, use of the silane-zeolite composite allows use of increased amounts of both the zeolite and silicate solids as builders in detergents.

Detergent compositions with silane-zeolite silicate builder

Hydrophilic, silane-zeolite compositions, their preparation, properties and applications are disclosed. These unique composites are formed by condensing a hydrophilic silane onto the surface of a hydrated zeolite. The properties of the silane-zeolite composite are surprisingly similar to those of the zeolite without the surface modification of the silane. These composites are useful in numerous applications of zeolite, particularly in aqueous environments. The composites are particularly suited to be included in detergent compounds as the builder since they do not agglomerate with other detergent ingredients as do zeolites.

Silane-zeolite compositions

A process for the preparation of finely divided dispersible alpha-alumina monohydrate (boehmite) from alumina trihydrate is disclosed. The alumina trihydrate is calcined thereby increasing the surface area through a partial dehydration. The calcined intermediate is slurried in water and autoclaved to achieve crystallization and rehydration. Conventional drying methods are used to obtain the particles. The particle size of the product is much smaller than that of the starting raw material.

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Wilmington, DE, United States of America

Elliot P Hertzenberg