PRECIPITATED SILICA HAVING HYPER-ORDER STRUCTURE

PROBLEM TO BE SOLVED: To obtain a precipitated silica having improved DBP absorption. SOLUTION: This precipitated silica has a pH value of 3 to 8, a BET surface area of 400 to 600 m /g, a DBP absorption of 380 to 420 g/100 g, a bulk density of 100 to 200 g/L and a residue on ALPINE sieve with >63...

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Bibliographic Details
Main Authors MEIER KARL, KUHLMANN ROBERT
Format Patent
LanguageEnglish
Published 11.09.2002
Edition7
Subjects
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOUNDS THEREOF
FODDER
FOODS OR FOODSTUFFS
HUMAN NECESSITIES
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
ORGANIC MACROMOLECULAR COMPOUNDS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR PREPARATION OR CHEMICAL WORKING-UP
THEIR RELEVANT APPARATUS
THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
TRANSPORTING
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Summary:PROBLEM TO BE SOLVED: To obtain a precipitated silica having improved DBP absorption. SOLUTION: This precipitated silica has a pH value of 3 to 8, a BET surface area of 400 to 600 m /g, a DBP absorption of 380 to 420 g/100 g, a bulk density of 100 to 200 g/L and a residue on ALPINE sieve with >63 μm size of 0.1 to 40%, and the method for producing the precipitated silica comprises the steps of (a) adding water and sulfuric acid simultaneously within at least 100 minutes to an aqueous material heated at 35 to 45 deg.C under shear by agitation maintaining the pH value of 6 to 7, wherein the addition is intermitted for 60 to 120 minutes, and the solid concentration is adjusted to 36 to 42 g/L upon completion of the addition, (b) filtering the solid and washing the filtered cake, and (c) drying the solid in a short time.
Bibliography:Application Number: JP20010358187