摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
Dispersible colloidal particles of .alpha. alumina monohydrate are prepared by conditioning aqueous solutions of an aluminum salt with an organic solvent and the precipitating alumina with an aqueous solution of base. The reaction mixture is heated under pressure, filtered, washed and dried to obtain the product.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.