FR2567505B1 - Silice a prise d'huile elevee et a structure primaire controlee et procede pour son obtention - Google Patents

Silice a prise d'huile elevee et a structure primaire controlee et procede pour son obtention

Info

Publication number
FR2567505B1
FR2567505B1 FR8411004A FR8411004A FR2567505B1 FR 2567505 B1 FR2567505 B1 FR 2567505B1 FR 8411004 A FR8411004 A FR 8411004A FR 8411004 A FR8411004 A FR 8411004A FR 2567505 B1 FR2567505 B1 FR 2567505B1
Authority
FR
France
Prior art keywords
silica
primary structure
obtaining same
controlled primary
oil silica
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
FR8411004A
Other languages
English (en)
French (fr)
Other versions
FR2567505A1 (fr
Inventor
Yvonick Chevallier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rhone Poulenc Chimie de Base SA
Original Assignee
Rhone Poulenc Chimie de Base SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rhone Poulenc Chimie de Base SA filed Critical Rhone Poulenc Chimie de Base SA
Priority to FR8411004A priority Critical patent/FR2567505B1/fr
Priority to EP85401379A priority patent/EP0170579B1/fr
Priority to DE8585401379T priority patent/DE3568155D1/de
Priority to AT85401379T priority patent/ATE40669T1/de
Priority to CA000486487A priority patent/CA1285116C/en
Priority to JP60152150A priority patent/JPS61117113A/ja
Priority to KR1019850004952A priority patent/KR910009573B1/ko
Publication of FR2567505A1 publication Critical patent/FR2567505A1/fr
Priority to US06/879,492 priority patent/US4708859A/en
Application granted granted Critical
Publication of FR2567505B1 publication Critical patent/FR2567505B1/fr
Priority to US07/005,012 priority patent/US4842838A/en
Priority to US07/081,980 priority patent/US4874594A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
    • C01B33/187—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof by acidic treatment of silicates
    • C01B33/193—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof by acidic treatment of silicates of aqueous solutions of silicates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/01—Particle morphology depicted by an image
    • C01P2004/04—Particle morphology depicted by an image obtained by TEM, STEM, STM or AFM
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/50—Agglomerated particles
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/11—Powder tap density
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/14—Pore volume
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/19—Oil-absorption capacity, e.g. DBP values
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/90—Other properties not specified above

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Nanotechnology (AREA)
  • Inorganic Chemistry (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Physics & Mathematics (AREA)
  • Silicon Compounds (AREA)
  • Lubricants (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Fats And Perfumes (AREA)
FR8411004A 1984-07-11 1984-07-11 Silice a prise d'huile elevee et a structure primaire controlee et procede pour son obtention Expired FR2567505B1 (fr)

Priority Applications (10)

Application Number Priority Date Filing Date Title
FR8411004A FR2567505B1 (fr) 1984-07-11 1984-07-11 Silice a prise d'huile elevee et a structure primaire controlee et procede pour son obtention
DE8585401379T DE3568155D1 (en) 1984-07-11 1985-07-08 Silica with a high oil-uptake and controlled primary structure, and process for the preparation thereof
AT85401379T ATE40669T1 (de) 1984-07-11 1985-07-08 Kieselsaeure mit hoher oelaufnahme und gesteuerter primaerer struktur sowie verfahren zu deren herstellung.
EP85401379A EP0170579B1 (fr) 1984-07-11 1985-07-08 Silice à prise d'huile élevée et à structure primaire controlée et procédé pour son obtention
CA000486487A CA1285116C (en) 1984-07-11 1985-07-09 Silica with a high oil absorption capability and a controlled primary structure and process for the production thereof
JP60152150A JPS61117113A (ja) 1984-07-11 1985-07-10 高い吸油性能と制御された一次構造とを有するシリカ及びその製造方法
KR1019850004952A KR910009573B1 (ko) 1984-07-11 1985-07-11 실리카의 제조방법
US06/879,492 US4708859A (en) 1984-07-11 1986-06-24 Silica with a high oil absorption capability and a controlled primary structure and process for the production thereof
US07/005,012 US4842838A (en) 1984-07-11 1987-01-16 Silica with a high oil absorption capability and a controlled primary structure and process for the production thereof
US07/081,980 US4874594A (en) 1984-07-11 1987-08-05 Silica with a high oil absorption capability and a controlled primary structure and process for the production thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8411004A FR2567505B1 (fr) 1984-07-11 1984-07-11 Silice a prise d'huile elevee et a structure primaire controlee et procede pour son obtention

Publications (2)

Publication Number Publication Date
FR2567505A1 FR2567505A1 (fr) 1986-01-17
FR2567505B1 true FR2567505B1 (fr) 1986-11-21

Family

ID=9306012

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8411004A Expired FR2567505B1 (fr) 1984-07-11 1984-07-11 Silice a prise d'huile elevee et a structure primaire controlee et procede pour son obtention

Country Status (8)

Country Link
US (3) US4708859A (https=)
EP (1) EP0170579B1 (https=)
JP (1) JPS61117113A (https=)
KR (1) KR910009573B1 (https=)
AT (1) ATE40669T1 (https=)
CA (1) CA1285116C (https=)
DE (1) DE3568155D1 (https=)
FR (1) FR2567505B1 (https=)

Families Citing this family (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2589871B1 (fr) * 1985-09-13 1987-12-11 Rhone Poulenc Chim Base Charge renforcante pour elastomere a base de silice
GB8713263D0 (en) * 1987-06-05 1987-07-08 Unilever Plc Spheroidal silica
US5614177A (en) * 1987-11-04 1997-03-25 Rhone-Poulenc Chimie Dentifrice-compatible silica particulates
US5286478A (en) * 1987-11-04 1994-02-15 Rhone-Poulenc Chimie Dentifrice-compatible silica particulates
FR2631620B1 (fr) * 1988-05-19 1990-07-27 Rhone Poulenc Chimie Nouvelle silice precipitee absorbante et composition a base de cette s ilice
FR2632185B1 (fr) * 1988-06-01 1992-05-22 Rhone Poulenc Chimie Silice pour compositions dentifrices compatible notamment avec le zinc
FR2649089B1 (fr) * 1989-07-03 1991-12-13 Rhone Poulenc Chimie Silice a porosite controlee et son procede d'obtention
US5225177A (en) * 1990-01-19 1993-07-06 J. M. Huber Corporation Dentifrice abrasives and compositions
US5094829A (en) * 1990-06-21 1992-03-10 Ppg Industries, Inc. Reinforced precipitated silica
FR2678259B1 (fr) * 1991-06-26 1993-11-05 Rhone Poulenc Chimie Nouvelles silices precipitees sous forme de granules ou de poudres, procedes de synthese et utilisation au renforcement des elastomeres.
US6001322A (en) * 1993-09-29 1999-12-14 Rhone-Poulenc Chimie Precipitated silicas
US6169135B1 (en) 1993-09-29 2001-01-02 Rhone Poulenc Chimie Precipitated silica
EP0670813B1 (fr) * 1993-09-29 2003-03-12 Rhodia Chimie Silice precipitee
FR2710630B1 (fr) * 1993-09-29 1995-12-29 Rhone Poulenc Chimie Nouvelles silices précipitées, leur procédé de préparation et leur utilisation au renforcement des élastomères.
WO1995017459A1 (en) * 1993-12-20 1995-06-29 Ppg Industries, Inc. Tire tread composition comprising highly reinforcing silica
WO1995017458A1 (en) * 1993-12-20 1995-06-29 Ppg Industries, Inc. Tire tread composition comprising highly reinforcing silica
FR2714369B1 (fr) * 1993-12-29 1996-01-26 Rhone Poulenc Chimie Silices abrasives pour compositions dentifrices.
FR2732331B1 (fr) * 1995-03-29 1997-06-20 Rhone Poulenc Chimie Nouveau procede de preparation de silice precipitee, nouvelles silices precipitees contenant du zinc et leur utilisation au renforcement des elastomeres
JP2908253B2 (ja) * 1994-09-26 1999-06-21 日本化学工業株式会社 水和珪酸とその製造方法
US5846506A (en) * 1994-10-07 1998-12-08 Degussa Aktiengesellschaft Precipitated silicas
US5571494A (en) * 1995-01-20 1996-11-05 J. M. Huber Corporation Temperature-activated polysilicic acids
FR2732330B1 (fr) * 1995-03-29 1997-06-20 Rhone Poulenc Chimie Nouveau procede de preparation de silice precipitee, nouvelles silices precipitees contenant du zinc et leur utilisation au renforcement des elastomeres
IL117915A (en) * 1995-04-19 2001-05-20 Ppg Ind Ohio Inc Amorphous precipitated silica having large liquid carrying capacity
US5911963A (en) * 1995-05-12 1999-06-15 Ppg Industries Ohio, Inc. Amorphous precipitated silica having a low proportion of small pores
DE19527278A1 (de) * 1995-07-26 1997-01-30 Degussa Fällungskieselsäure
US5804293A (en) * 1995-12-08 1998-09-08 Ppg Industries, Inc. Coating composition for recording paper
EP0902758B1 (en) * 1996-05-31 2001-06-06 PPG Industries Ohio, Inc. Amorphous precipitated silica
KR100342941B1 (ko) * 1996-05-31 2002-08-22 피피지 인더스트리즈 오하이오 인코포레이티드 무정형의침전된실리카
FR2750692B1 (fr) * 1996-07-05 1998-10-16 Rhone Poulenc Chimie Nouvelle silice abrasive, utilisable dans les dentifrices, son procede de preparation et compositions dentifrices la contenant
FR2762611B1 (fr) * 1997-04-29 1999-06-11 Atochem Elf Sa Silice poreuse modifiee, son procede de fabrication et son utilisation dans les peintures et comme vecteur de pigments et colorants
US5891949A (en) * 1997-05-02 1999-04-06 J.M. Huber Corporation Natural rubber compound
US5929156A (en) * 1997-05-02 1999-07-27 J.M. Huber Corporation Silica product for use in elastomers
FR2763581B1 (fr) * 1997-05-26 1999-07-23 Rhodia Chimie Sa Silice precipitee utilisable comme charge renforcante pour elastomeres
US6607648B1 (en) * 1998-11-10 2003-08-19 Integrity Technologies Llc Method and apparatus for generating aqueous silica network particles
US6573032B1 (en) * 1999-04-22 2003-06-03 J. M. Huber Corporation Very high structure, highly absorptive hybrid silica and method for making same
US6624233B2 (en) 1999-05-31 2003-09-23 Pirelli Pneumatici S.P.A. Low rolling resistance tire for vehicles
BR0011098A (pt) * 1999-05-31 2002-03-26 Pirelli Pneu com baixa resistência ao rolamento para veìculos, banda de rodagem com baixa resistência ao rolamento para pneus de veìculo, e, método para redução da resistência ao rolamento de um pneu
CA2292819A1 (en) * 1999-12-22 2001-06-22 Bayer Inc. Process for the production of a precipitated silica slurry with a controlled aggregate particle size distribution
US7700062B2 (en) * 2000-10-13 2010-04-20 University Of Cincinnati Methods for synthesizing precipitated silica and use thereof
EP1284277B1 (de) * 2001-08-08 2004-10-20 Degussa Aktiengesellschaft Mit Siliziumdioxid umhüllte Metalloxidpartikel
US20030096900A1 (en) * 2001-11-16 2003-05-22 Holden Brian David Organic plant derived precipitated silica aggregates, elastomers reinforced therewith and articles such as tires with component thereof
FR2833937B1 (fr) * 2001-12-26 2004-11-12 Rhodia Chimie Sa Silices a faible reprise en eau
EP1495502A4 (en) * 2002-02-07 2006-12-13 Kvg Technologies Inc GELIFIED ELECTROLYTE LEAD BATTERY BATTERY, FORMED BY FILTRATION OF ABSORBENT SEPARATORS, ITS ELECTROLYTES, AND ITS ABSORBENT SEPARATORS
JP2005053728A (ja) * 2003-08-01 2005-03-03 Dsl Japan Co Ltd 高吸油性および高い構造性を有する非晶質シリカ粒子
IN2007DE00954A (https=) * 2007-05-03 2016-05-06
FR2928363B1 (fr) * 2008-03-10 2012-08-31 Rhodia Operations Nouveau procede de preparation de silices precipitees, silices precipitees a morphologie, granulometrie et porosite particulieres et leurs utilisations, notamment pour le renforcement de polymeres
US8790608B2 (en) * 2008-09-12 2014-07-29 Nalco Company Siliceous materials having tunable porosity and surface morphology and methods of synthesizing same
CN102164853B (zh) * 2008-09-26 2014-12-31 扶桑化学工业株式会社 含有具有弯曲结构和/或分支结构的二氧化硅二次颗粒的胶体二氧化硅及其制造方法
US8609068B2 (en) 2010-02-24 2013-12-17 J.M. Huber Corporation Continuous silica production process and silica product prepared from same
JP5495880B2 (ja) * 2010-03-25 2014-05-21 扶桑化学工業株式会社 コロイダルシリカの二次粒子径調整方法
US20130109072A1 (en) * 2010-06-09 2013-05-02 National Institute Of Advanced Industrial Science And Technology Support for protein immobilization, immobilized protein, and methods for producing the same
US9028605B2 (en) 2011-02-25 2015-05-12 J.M. Huber Corporation Coating compositions comprising spheroid silica or silicate
JP2025542087A (ja) 2022-11-08 2025-12-25 エボニック オペレーションズ ゲーエムベーハー 沈降シリカおよびその方法

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2466842A (en) * 1945-11-15 1949-04-12 Davison Chemical Corp Method for making silica hydrosol
US2577485A (en) * 1950-09-08 1951-12-04 Du Pont Process of making stable silica sols and resulting composition
GB710015A (en) * 1950-12-02 1954-06-02 Degussa An improved process for the production of finely divided silica
CH341802A (de) * 1955-02-03 1959-10-31 Basf Ag Verfahren zur kontinuierlichen Herstellung kieselsäurehaltiger Hydrogele
US2956957A (en) * 1956-04-02 1960-10-18 Grace W R & Co Method for producing clear, homogeneous silica hydrosols
GB1044019A (en) * 1963-10-17 1966-09-28 Permutit Co Ltd Improvements relating to the production of silica sol
DE1299617B (de) * 1965-01-13 1969-07-24 Degussa Verfahren zur Herstellung von feinverteiltem gefaelltem Siliciumdioxid
US3337299A (en) * 1965-05-24 1967-08-22 Jr Oliver W Burke Silica pigments and process for producing same
US4001379A (en) * 1968-04-27 1977-01-04 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler Process of making superfine amorphous high structural silicic acid
US3954944A (en) * 1973-03-08 1976-05-04 Joseph Crosfield & Sons, Ltd. Fine silicas
US4191742A (en) * 1974-05-22 1980-03-04 J. M. Huber Corporation Amorphous precipitated siliceous pigments and methods for their production
US4144321A (en) * 1974-10-31 1979-03-13 J. M. Huber Corporation Amorphous precipitated siliceous pigments and methods for their production
US4127641A (en) * 1975-12-10 1978-11-28 Joseph Crosfield And Sons Limited Process for the preparation of precipitated silicas having morphology similar to pyrogenic silicas
FR2353486A1 (fr) * 1976-06-04 1977-12-30 Rhone Poulenc Ind Nouvelle silice de synthese amorphe, procede pour son obtention et application de ladite silice dans les vulcanisats
FR2444700A1 (fr) * 1978-12-20 1980-07-18 Rhone Poulenc Ind Nouvel agent recurant non abrasif et composition lessivielle le renfermant
US4243428A (en) * 1979-01-24 1981-01-06 Donnet Jean Baptise Processes for the manufacturing of precipitated silica
US4356107A (en) * 1979-11-26 1982-10-26 Nalco Chemical Company Process for preparing silica sols
JPS59163306A (ja) * 1983-03-08 1984-09-14 Taki Chem Co Ltd 歯磨用シリカ基剤及びその製法
FR2562534B1 (fr) * 1984-04-06 1986-06-27 Rhone Poulenc Chim Base Nouvelle silice precipitee a caracteres morphologiques ameliores, procede pour son obtention et application, notamment comme charge

Also Published As

Publication number Publication date
US4708859A (en) 1987-11-24
DE3568155D1 (en) 1989-03-16
JPH0130764B2 (https=) 1989-06-21
US4874594A (en) 1989-10-17
US4842838A (en) 1989-06-27
EP0170579B1 (fr) 1989-02-08
FR2567505A1 (fr) 1986-01-17
ATE40669T1 (de) 1989-02-15
EP0170579A1 (fr) 1986-02-05
CA1285116C (en) 1991-06-25
KR860001008A (ko) 1986-02-22
JPS61117113A (ja) 1986-06-04
KR910009573B1 (ko) 1991-11-21

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