CAS: 13472-30-5; Sodium Orthosilicate

专利信息

专利号:US-5965105-A
优先权日:1998-06-12
标 题:Process for the synthesis of flyash based Zeolite-A
发明人：RAYALU SADHANA; LABHASETWAR NITIN KUMAR; KHANNA PURUSHOTTAM
权利人:COUNCIL SCIENT IND RES
摘要:The present invention relates to a process for synthesis of flyash based Zeolite-A, said process comprising grinding and mixing of flyash and caustic soda in a ratio of 1:1.2 and optionally adding sodium aluminate or aluminium hydroxide to obtain a fine homogeneous fusion mixture; heating the said mixture in an inert vessel at about 500-600 DEG C. for about 1-2 hrs. to obtain a fused mass; cooling, milling, and mixing the said fused mass in distilled water for about 8-10 hrs. with simultaneous optional additon of sodium aluminate or alum solution, in the present or absence of NaC1 followed by optional addition of zeolite-A seeding to obtain amorphous alumino -silicate slurry; subjecting the said slurry to hydrothermal crystallisation at about 90-110 DEG C. for 2 to 4 hrs. to obtain Zeolite-A crystals; and washing the said crystals with water and then subjecting the washed crystals to oven drying at about 50-60 DEG C. to obtain the FAZ-A crystals.

专利号:US-10457560-B1
优先权日:2007-12-07
标 题 :Synthesis of mesoporous silica shapes using sodium silicate as a silica source
发明人：SOKOLOV IGOR; NAIK SAJO P
权利人:SOKOLOV IGOR; NAIK SAJO P; UNIV CLARKSON
摘要:This invention describes the self-assembly of meso(nano)porous silica particles from inorganic an inexpensive silica precursor, sodium silicate. The particles have a well defined shape, high surface area, and high uniformity of the pore size, the properties that are typically found for high quality mesoporous material synthesized from organic silica precursors. The disclosure illustrates a synthesis of hard spheres, discoids, and a mixture comprising discoids, gyroids and fibers, termed as origami.

专利号:US-11554348-B2
优先权日:2016-11-10
标 题 :Method of preparing hierarchical porous channel molecular sieve membrane and application thereof
发明人：GU XUEHONG; YAO XUN; PENG LI
权利人:NANJING UNIVERSITY OF TECHNOLOGY
摘要:The invention relates to a method for preparing a hierarchical porous zeolite membrane and an application thereof, comprising the following steps: a mesoporous structure-directing agent is added to limit the growth of zeolite crystals, and self-assembled in the crystallization process to generate a mesoporous structure. Based on a seed crystal induced secondary nucleation mechanism, this method can realize one-step hydrothermal synthesis of hierarchical porous zeolite membrane with the advantages of mild and controllable synthesis conditions, simple process, good repeatability, reduced energy consumption and cost savings. The hierarchical porous zeolite membrane prepared by the method has good cut-off performance, and the cut-off molecular weight is adjustable between 200 to 500,000 Da.

专利号:US-5314674-A
优先权日:1991-11-08
标 题:Process for the synthesis of a zeolite of MTT type, products obtained and their application in adsorption and catalysts
发明人：DI R FRANCESCO DI RENZO; FRANCOIS FAJULA; THIERRY DES COURIERES; DIDIER ANGLEROT
权利人:ELF AQUITAINE
摘要:Process for the synthesis of a zeolite of MTT type in the absence of any nitrogenous organic agent, from a reaction mixture containing water, a source of tetravalent silicon and ethanol and optionally a source of trivalent aluminium and a source of hydroxide ions. The products obtained after heating the zeolite in air to 70 DEG -120 DEG C. or washing with water at 60 DEG -90 DEG C. are useful as selective organophilic adsorbents or as catalysts for the conversion of hydrocarbons.

专利号:WO-2006087337-A1
优先权日:2005-02-15
标题 :Nucleating gel, process for its preparation, and its use in the synthesis of mfi-type zeolite
发明人：STAMIRES DENNIS; LAM YIU LAU; GORNE JANAINA; WASSERMAN ROSANNA; MOREIRA FERREIRA JOSE CARLOS; DA SILVA JAIRO
权利人:ALBEMARLE NETHERLANDS BV; STAMIRES DENNIS; LAM YIU LAU; GORNE JANAINA; WASSERMAN ROSANNA; MOREIRA FERREIRA JOSE CARLOS; DA SILVA JAIRO
摘要:Process for the preparation of a nucleating gel, which process comprises the steps of: mixing sodium silicate, water, and a quaternary ammonium sait, adjusting the molar ratio OH-/SiO2 in the mixture to a value in the range 0.20-0.60 by adding an acid or base, and aging the mixture for at least 30 minutes at a temperature in the range 25 to 100°C. This process results in a nucleating gel which is very active in the synthesis of MFI zeolites.

专利号:EP-1707533-A1
优先权日:2005-04-01
标 题:Nucleating gel, process for its preparation, and its use in the synthesis of MFI-type zeolite
发明人：LAM YIU LAU; STAMIRES DENNIS; GORNE JANAINA; WASSERMAN ROSANA; MOREIRA FERREIRA JOSE MARCOS; DA SILVA JAIRO
权利人:PETROLEO BRASILEIRO SA; ALBEMARLE NETHERLANDS BV
摘要:Process for the preparation of a nucleating gel, which process comprises the steps of: mixing sodium silicate, water, and a quaternary ammonium salt, adjusting the molar ratio OH - /SiO 2 in the mixture to a value in the range 0.20-0.60 by adding an acid or base, and aging the mixture for at least 30 minutes at a temperature in the range 25 to 100°C. n This process results in a nucleating gel which is very active in the synthesis of MFI zeolites.