Process for the preparation of crystalline sheet sodium silicates
December 8, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesDetergent composition and process Process for producing granular detergent composition High-sudsing, granular detergent composition with greater granulate stability and process for its preparation Process for the preparation of crystalline sodium silicates Crystalline layered silicate Use of crystalline layered sodium silicates for softening water and a process for softening water Layered silicates of limited swelling power, a process for their production and their use in detergents and cleaning preparations Patent #: 4737306 InventorsApplicationNo. 281805 filed on 12/08/1988US Classes:23/295R, Crystallization23/303, Common salt423/332, Alkali metal containing (Li, Na, K, Rb, or Cs)423/333By precipitating or gelling from silicate solutionExaminersPrimary: Nucker, Christine M.Assistant: Steffe, Eric Foreign Patent References
International ClassC01B 033/02Foreign Application Priority Data1987-12-11 DEAbstractX-ray crystalline sodium silicates having a sheet structure and an SiO2 :Na2 O molar ratio of 1.9 to 3.5 are prepared by dissolving an X-ray crystalline sodium silicate having a sheet structure and an SiO2 /Na2 O molar ratio of 1.9:1 to 3.5:1 in water and evaporating the solution at temperatures of 20° to 445° C.For the preparation of detergents or cleaners, a mixture of surfactants and builders, which may also contain fillers, bleaching agents, bleach activators and enzymes, is made into a paste with water, mixed with an X-ray crystalline sheet sodium silicate having an SiO2 /Na2 O molar ratio of 1.9:1 to 3.5:1, mixed thoroughly and then spray-dried.Other References
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