Church Dwight & Co., Inc.

Andrew D Kurtz

Dragomir Mark Bracilovic

Joseph A Paluzzi

Lawrence Kirschner

Herman L Marder

Zbigniew Senk

Anthony E Winston

William J Zuccarello

Thyge Borup Hjorth

John J Steinke

Poul Bertelsen

Zbignew M Senk

Nils Gjerlov Hansen

A boundary layer carbonation process for producing sodium bicarbonate crystals having specific surface area in the range 0.4 m/g to 2.5 m/g from Trona, wherein in one embodiment the process comprises the steps of: providing Trona particles having a particle size range of &#x2212;4+120 mesh; pre-wetting the Trona particles with water to provide a plurality of pre-wetted Trona particles each having a liquid water solution boundary layer deposited thereon; and carbonating the pre-wetted Trona particles across the water boundary layer to provide a product comprising sodium bicarbonate crystals.

Boundary layer carbonation of trona

A boundary layer carbonation process for producing sodium bicarbonate crystals having specific surface area in the range 0.4 m/g to 2.5 m/g from Trona, wherein in one embodiment the process comprises the steps of: providing Trona particles having a particle size range of &#x2212;4 +120 mesh; pre-wetting the Trona particles with water to provide a plurality of pre-wetted Trona particles each having a liquid water solution boundary layer deposited thereon; and carbonating the pre-wetted Trona particles across the water boundary layer to provide a product comprising sodium bicarbonate crystals.

Boundary layer carbonation of Trona

A method of producing sodium bicarbonate having a high degree of purity and obtaining a net reduction in effluent waste water, as compared to prior processes, when starting from trona ore is disclosed. The process entails utilizing the waste-water effluent stream from the conversion of trona ore to sodium carbonate as the feed for the conversion of sodium carbonate to sodium bicarbonate.

Sodium bicarbonate production method

Multiparticulate controlled release preparations incorporating an alkalinizing potassium salt, preferably potassium bicarbonate, as an active ingredient, which are suitable for forming pharmaceutical dosage forms for oral administration. Such dosage forms are useful for potassium supplementation and for the treatment of degenerative bone or cardiovascular diseases, e.g., osteoporosis and hypertension.

Alkalinizing potassium salt controlled release preparations

A large size, small surface area, granular crystalline potassium bicarbonate product suitable for application as an active ingredient in pharmaceutical oral unit dosage forms useful for the treatment of various degenerative bone and cardiovascular diseases, particularly osteoporosis or hypertension, comprising potassium bicarbonate crystals having a mean particle size of at least 350 microns and a specific B.E.T. surface area less than 0.02 m.sup.2 /gram. A process for preparing such product is further provided, in which a solution of potassium bicarbonate is fed to a slurry of potassium bicarbonate crystals in a crystallizer and the temperatures and concentrations of the potassium bicarbonate in the feed solution and the crystallizer slurry are so regulated, and the residence time and degree of agitation in the crystallizer are so controlled, that the desired large size, small surface area potassium bicarbonate crystals are produced.

Large potassium bicarbonate crystals and process for the preparation

A blast media for stripping contaminants from a substrate comprises abrasive particles which are formed by agglomerating fine particles of sodium bicarbonate with an aqueous binder solution of sodium carbonate to form composite particles of sodium bicarbonate and sodium sesquicarbonate which is formed by the reaction of the bicarbonate with the carbonate in solution.

Large size sodium bicarbonate blast media

A process for reducing the amount of residual carbonate on alkali metal bicarbonates which comprises:

Process for curing bicarbonates

A process for the production of potassium bicarbonate, involving the dry carbonation of potassium carbonate with a carbon dioxide gas stream having temperatures of up to 115.degree. C. and relative humidities of from 40% to 75%. High conversions of the potassium carbonate, carbon dioxide and water vapor reactants are achieved, with the formation of a substantially dry bicarbonate product which may be further processed without additional drying or handling expense.

Growing community of inventors

Belle Mead, NJ, United States of America

Andrew D Kurtz