Patent application number | Description | Published |
20090136672 | NEW PRECIPIATED SILICA FOR THICKENING AND CREATING THIXOTROPIC BEHAVIOR IN LIQUID SYSTEMS - A precipitated silica having a d | 05-28-2009 |
20090137732 | PRECIPITATED SILICAS FOR STORAGE-STABLE RTV-1 SILICONE RUBBER FORMULATIONS WITHOUT STABILIZER - A precipitated silica having an SiOH | 05-28-2009 |
20100285317 | AMORPHOUS SUBMICRON PARTICLES - A process for milling amorphous solids using a milling apparatus can result in particles having a median particle diameter d | 11-11-2010 |
20110236288 | METHOD FOR PRODUCING HIGH-PURITY SIO2 FROM SILICATE SOLUTIONS - The invention relates to a novel method for producing high-purity SiO | 09-29-2011 |
20110244238 | METHOD FOR PRODUCING HIGH-PURITY SIO2 FROM SILICATE SOLUTIONS - The invention relates to a novel method for producing high-purity SiO | 10-06-2011 |
20110262336 | PRODUCTION OF SOLAR-GRADE SILICON FROM SILICON DIOXIDE - The invention relates to a complete method for producing pure silicon that is suitable for use as solar-grade silicon, comprising the reduction of a silicon oxide, purified by acidic precipitation from an aqueous solution of a silicon oxide dissolved in an aqueous phase, using one or more pure carbon sources, the purified silicon oxide being obtained, in particular, by the precipitation of a silicon oxide dissolved in an aqueous phase in an acidifier. The invention also relates to a formulation containing an activator and to a device for producing silicon, a reactor and electrodes. | 10-27-2011 |
20110262339 | PRODUCTION OF SOLAR-GRADE SILICON FROM SILICON DIOXIDE - The invention relates to a complete method for producing pure silicon that is suitable for use as solar-grade silicon, comprising the reduction of a purified silicon oxide using one or more pure carbon sources, the purified silicon oxide, which was purified as silicon oxide dissolved in an aqueous phase, having a content of other polyvalent metals or metal oxides, in relation to the silicon oxide, of less than or equal to 300 ppm, preferably less than 100 ppm, especially preferably less than 50 ppm and according to the invention less than 10 ppm of the other metals and being obtained advantageously by gel formation in alkaline conditions. The invention also relates to a formulation containing an activator and to the use of purified silicon oxide together with an activator for producing silicon. | 10-27-2011 |
20110315912 | THERMAL INSULATION MATERIAL COMPRISING PRECIPITATED SILICA - A thermal insulation material comprising a precipitated silica having a modified tapped density of less than or equal to 70 g/l. | 12-29-2011 |
20140042359 | PROCESS FOR PREPARING AQUEOUS COLLOIDAL SILICA SOLS OF HIGH PURITY FROM ALKALI METAL SILICATE SOLUTIONS - The present invention relates to a process for preparing aqueous colloidal silica sols of high purity from silicate solutions, to aqueous colloidal silica sols with a specific profile of impurities, and to the use thereof. The invention further encompasses high-purity aqueous silica obtained as an intermediate in the course of the purification process, high-purity silicon dioxide obtainable by dewatering, and the use thereof. | 02-13-2014 |
20140072803 | HIGH-PURITY SILICON DIOXIDE GRANULES FOR QUARTZ GLASS APPLICATIONS AND METHOD FOR PRODUCING SAID GRANULES - It has been found that conventional cheap waterglass qualities in a strongly acidic medium react to give high-purity silica grades, the treatment of which with a base leads to products which can be processed further to give glass bodies with low silanol group contents. | 03-13-2014 |
20140079620 | METHOD FOR THE SEPARATION OF METAL IONS THAT ARE DIVALENT OR HIGHER FROM STRONG ACIDS OR HIGHLY ACIDIC MEDIA - The present invention relates to a method of purifying strong acids or strongly acidic media to remove di- and higher valent metal ions, which can be used within the context of the production of high-purity silica. The invention further relates to the use of special ion exchangers for carrying out the method according to the invention and the resultant high-purity silicas. | 03-20-2014 |