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公开(公告)号：PT2550095T
公开(公告)日：2017-12-18
申请号：PT11707879
申请日：2011-03-14
Applicant: EVONIK DEGUSSA GMBH
Inventor： FRANK HEINDL , CLAUS-PETER DREXEL , FRANK HASELHUHN , RALF RAUSCH , GÜNTER STEIN
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公开(公告)号：BR112012024021B1
公开(公告)日：2018-07-24
申请号：BR112012024021
申请日：2011-03-14
Applicant: EVONIK DEGUSSA GMBH
Inventor： CLAUS-PETER DREXEL , FRANK HASELHUHN , FRANK HEINDL , GÜNTER STEIN , RALF RAUSCH
Abstract: ácidos silícicos portadores em partículas grossas. a presente invenção refere-se a ácidos silícicos granulares de novo tipo para aplicação como material portador, especialmente como portador de catalisadore para reatores de leito fix, à sua fabricação e ao seu uso.
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公开(公告)号：PH30936A
公开(公告)日：1997-12-23
申请号：PH48754
申请日：1994-08-05
Applicant: DEGUSSA
Inventor： HEINZ ESCH , ROBERT KUHLMANN , MATTIAS NEUMUELLER , KARIN OTTO , RALF RAUSCH
Abstract: Precipitated silica having a BET surface area of 10-130 m /g, a CTAB surface area of 10-70 m /g, a mean particle diameter of 5-20 mu m, a Cu abrasion in 10% strength glycerol (glycerine) dispersion of 4-50 mg and a thickening behaviour in CMC solution (20% strength dispersion) of 300-3500 mPa.s is prepared by simultaneously adding alkali metal silicate (weight ratio SiO2: alkali metal oxide = 2.5-3.9:1) and a mineral acid to an initial charge of water which has been adjusted to a pH of from 7.0 to 9.9 or from 10.0 to 10.7 by addition of water, keeping the pH constant between 7.0 and 9.9 or 10.0 and 10.7, with the initial precipitation temperature being 50-90 DEG C and a viscosity increase commencing at the latest after 25% of the precipitation time, setting the pH to /= 160 g/l to 240 g/l, separating off the solid by filtration and washing, drying and milling it. The precipitated silica can be used as abrasive and/or thickening component in toothpastes.
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