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1. WO2001046073 - PROCESS FOR THE PRODUCTION OF A PRECIPITATED SILICA SLURRY WITH A CONTROLLED AGGREGATE PARTICLE SIZE DISTRIBUTION

Publication Number WO/2001/046073
Publication Date 28.06.2001
International Application No. PCT/CA2000/001473
International Filing Date 15.12.2000
Chapter 2 Demand Filed 06.04.2001
IPC
B01J 19/00 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
19Chemical, physical or physico-chemical processes in general; Their relevant apparatus
B01J 19/18 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
19Chemical, physical or physico-chemical processes in general; Their relevant apparatus
18Stationary reactors having moving elements inside
C01B 33/193 2006.1
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF
33Silicon; Compounds thereof
113Silicon oxides; Hydrates thereof
12Silica; Hydrates thereof, e.g. lepidoic silicic acid
18Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
187by acidic treatment of silicates
193of aqueous solutions of silicates
CPC
B01J 19/0086
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
19Chemical, physical or physico-chemical processes in general; Their relevant apparatus
0086Processes carried out with a view to control or to change the pH-value; Applications of buffer salts; Neutralisation reactions
B01J 19/18
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
19Chemical, physical or physico-chemical processes in general; Their relevant apparatus
18Stationary reactors having moving elements inside
B01J 2219/00069
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
2219Chemical, physical or physico-chemical processes in general; Their relevant apparatus
00049Controlling or regulating processes
00051Controlling the temperature
00054Controlling or regulating the heat exchange system
00056involving measured parameters
00069Flow rate measurement
B01J 2219/00164
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
2219Chemical, physical or physico-chemical processes in general; Their relevant apparatus
00049Controlling or regulating processes
00164controlling the flow
B01J 2219/00166
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
2219Chemical, physical or physico-chemical processes in general; Their relevant apparatus
00049Controlling or regulating processes
00164controlling the flow
00166controlling the residence time inside the reactor vessel
B01J 2219/00177
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
2219Chemical, physical or physico-chemical processes in general; Their relevant apparatus
00049Controlling or regulating processes
00177controlling the pH
Applicants
  • BAYER INC. [CA]/[CA] (AllExceptUS)
  • KOSKI, Ahti [CA]/[CA] (UsOnly)
Inventors
  • KOSKI, Ahti
Agents
  • SMART & BIGGAR
Priority Data
2,292,81922.12.1999CA
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR THE PRODUCTION OF A PRECIPITATED SILICA SLURRY WITH A CONTROLLED AGGREGATE PARTICLE SIZE DISTRIBUTION
(FR) PROCESSUS DE PRODUCTION D'UNE SUSPENSION EPAISSE DE SILICE PRECIPITE AVEC REPARTITION CONTROLEE DU CALIBRE DES PARTICULES D'AGREGAT
Abstract
(EN) A continuous process for producing a precipitated silica slurry is described. In the process, an aqueous metal silicate compound, an acid and an electrolyte are continuously fed to a mixing zone produce a reaction mixture. The reaction mixture is maintained at a temperature of less than about 100 °C in a quiescent zone. The reaction mixture is continuously removed from the quiescent zone. The precipitated silica slurry produced in accordance with the present process has a relatively narrow particle size distribution and may be dispersed more easily than currently available silica materials.
(FR) La présente invention concerne un processus continu permettant de produire une suspension épaisse de silice précipité. Dans ce processus, un composé de silice métallique aqueux, un acide et un électrolyte alimentent en continu une zone de mélange de façon à produire un mélange réactionnel. Ce mélange réactionnel est maintenu à une température inférieure à environ 100 °C dans une zone quiescente. Ce mélange réactionnel est continuellement retiré de cette zone quiescente. La suspension épaisse de silice précipité produite selon ce processus présente une répartition de calibre des particules relativement resserrée et elle peut être dispersée plus facilement que les matériaux de silice actuellement disponibles.
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