Abstract:
PROBLEM TO BE SOLVED: To provide silica which possesses particularly good sorption characteristics for polar compounds because silica is frequently used as a carrier material for polar compounds such as choline chloride, propionic acid or formic acid. SOLUTION: Precipitated silica or a silicate can be obtained by acid precipitation of an aqueous silicate solution while maintaining a constant alkali number of at least 15-60. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a metal-ion-doped silica wherein metal ions are fully embedded in the silicate skeleton. SOLUTION: Foreign-atom-doped precipitated silica is provided which has a BET surface area of above 300 m 2 /g and has a maximum surface concentration of foreign atoms of 0.05 mmol/m 2 . The foreign atoms are added in the form of an organic salt or an inorganic salt at the time of precipitation. The foreign atoms or a solution of a salt thereof is added at the time of adding sulfuric acid or near the time (15 to 5 min) of completion of the simultaneous addition of sodium silicate and sulfuric acid. The foreign atoms are exemplified by Al, Zr, Zn, Ti, P, Cr, V, Sc, Ga, In, Fe, Ag, Sc, Mn, Co, Ni, and Cu. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide silicic acid having excellent absorption behavior especially for a polar compound, since the silicic acid is used as a supporting material for the polar compound such as choline choloride, propionic acid and formic acid. SOLUTION: Precipitated silicic acid or silicate is obtained by precipitation from a silicate aqueous solution with an acid under at least one fixed alkalinity.
Abstract:
PROBLEM TO BE SOLVED: To obtain a silica doped by a metallic ion which is fully embedded in the silicate skeleton. SOLUTION: The precipitated silica doped with hetero-atoms has a BET surface area exceeding 300 m /g and maximum surface concentration of hetero- atoms of 0.05 mmol/m .
Abstract:
Provided is a hydrophilic precipitated silica which is well suited to use in silicone rubber formulations (RTV-1, RTV-2, HTV and LSR), particularly well suited to use in HTV silicone rubber formulations. It has a BET surface area of 185˜260 m2/g, a CTAB surface area of 100˜160 m2/g, a BET/CTAB ratio of 1.2˜2.6, and a conductivity of
Abstract:
Precipitated silica has the following properties: (1) BET surface area = 50-700m /g; (2) DBP absorption = 100-450g/100g; (3) choline chloride absorption for a 75 wt.% aqueous solution = 150-400g/100g; (4) CTAB surface area = 50-350m /g; and (5) DBP/choline chloride absorption ratio = below 1.07. An Independent claim is also included for production of the precipitated silica.
Abstract:
Precipitated silica has the following properties: (1) BET surface area = 50-700m /g; (2) DBP absorption = 100-450g/100g; (3) choline chloride absorption for a 75 wt.% aqueous solution = 150-400g/100g; (4) CTAB surface area = 50-350m /g; and (5) DBP/choline chloride absorption ratio = below 1.07. An Independent claim is also included for production of the precipitated silica.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung einer Fällungskieselsäure, wobei man Wasser vorlegt und Alkali- und/oder Erdalkalisilikat zugibt, bis sich ein pH-Wert von 8,0–10,8 einstellt, in diese Vorlage unter Rühren bei 50–95°C gleichzeitig Alkali- und/oder Erdalkalisilikat und ein Säuerungsmittel ohne Unterbrechung der Zudosierung zugibt bis ein Feststoffgehalt von größer 150 g/l erreicht ist, wobei das Säuerungsmittel auf den Scherkopf eines zusätzlichen Scheraggregats im Fällbehälter gegeben wird, anschließend mit einem Säuerungsmittel auf einen pH-Wert von ≤ 5,0 ansäuert, den Feststoff durch Filtration abtrennt und wäscht, trocknet und vermahlt. Die vorliegende Erfindung betrifft auch ein Verfahren zur Bestimmung des Schonabriebfaktors mit einem Abriebtestgerät, wobei man Prüfkörper aus gegossenem Polymethylmethacrylat einsetzt.
Abstract:
Precipitated silica has the following properties: (1) BET surface area = 50-700m /g; (2) DBP absorption = 100-450g/100g; (3) choline chloride absorption for a 75 wt.% aqueous solution = 150-400g/100g; (4) CTAB surface area = 50-350m /g; and (5) DBP/choline chloride absorption ratio = below 1.07. An Independent claim is also included for production of the precipitated silica.