Process for the preparation of crystalline sheet-type alkali metal silicates
Patent 4578258 Issued on March 25, 1986. Estimated Expiration Date: 
January 2, 2005. 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.
January 2, 2005. 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 ReferencesMethod of preparing crystalline zeolite Method of preparing crystalline zeolite Crystalline aluminosilicate and process for its production Patent #: 4481174 InventorApplicationNo. 06/688184 filed on 01/02/1985US Classes:423/325, Oxygen containing423/326, Metal containing (i.e., silicate)423/328.2, Crystalline423/332, Alkali metal containing (Li, Na, K, Rb, or Cs)423/333By precipitating or gelling from silicate solutionExaminersPrimary: Doll, JohnAssistant: Leeds, Jackson Attorney, Agent or FirmInternational ClassesC01B 33/12 (20060101)C01B 33/38 (20060101) C01B 33/00 (20060101) Foreign Application Priority Data1984-01-04 DEAbstractA process for the preparation of a crystalline sheet-type alkali metal silicate in an aqueous medium is described, in which an acidic compound is added to an amorphous alkali metal silicate, or an alkali metal silicate dissolved in water, having a molar ratio M2 O/SiO2 (M=alkali metal) of 0.24 to 2.0, in an amount such that a molar ratio M2 O (unneutralized)/SiO2 of 0.05 to 0.239 is obtained. If required, the molar ratio SiO2 /H2 O is adjusted from 1:5 to 1:100 by dilution, and the reaction mixture is kept at a reaction temperature of 70° to 250° C. until the sheet-type alkali metal silicate has crystallized out.Other References
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