CA2300615A1 - Continuous production of activated silica - Google Patents

Continuous production of activated silica Download PDF

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Publication number
CA2300615A1
CA2300615A1 CA 2300615 CA2300615A CA2300615A1 CA 2300615 A1 CA2300615 A1 CA 2300615A1 CA 2300615 CA2300615 CA 2300615 CA 2300615 A CA2300615 A CA 2300615A CA 2300615 A1 CA2300615 A1 CA 2300615A1
Authority
CA
Canada
Prior art keywords
activated silica
carbonic acid
sodium silicate
reactor
continuous production
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.)
Granted
Application number
CA 2300615
Other languages
French (fr)
Other versions
CA2300615C (en
Inventor
Derek Hornsey
Vicky Sidorkiewicz
Graham Hagens
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.)
Air Liquide Canada Inc
Original Assignee
Air Liquide Canada Inc
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 Air Liquide Canada Inc filed Critical Air Liquide Canada Inc
Publication of CA2300615A1 publication Critical patent/CA2300615A1/en
Application granted granted Critical
Publication of CA2300615C publication Critical patent/CA2300615C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

Provided is a method and apparatus for continuously producing activated silica from sodium silicate using carbon dioxide. The method comprises dissolving carbon dioxide in water to form carbonic acid and then reacting the carbonic acid with sodium silicate to produce activated silica in a reactor. The carbonic acid and sodium silicate are contacted under turbulent hydraulic conditions. The prevention of scale build ups can be achieved by using flexible tubing in the reactor. It is also preferred that a holding tank be employed in which the reaction is allowed to continue.
CA 2300615 1999-03-12 2000-03-10 Continuous production of activated silica Expired - Lifetime CA2300615C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US12414199P 1999-03-12 1999-03-12
US60/124,141 1999-03-12
US51562900A 2000-02-29 2000-02-29
US09/515,629 2000-02-29

Publications (2)

Publication Number Publication Date
CA2300615A1 true CA2300615A1 (en) 2000-09-12
CA2300615C CA2300615C (en) 2009-08-25

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ID=26822246

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2300615 Expired - Lifetime CA2300615C (en) 1999-03-12 2000-03-10 Continuous production of activated silica

Country Status (1)

Country Link
CA (1) CA2300615C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006058855A2 (en) * 2004-12-01 2006-06-08 Ciba Specialty Chemicals Water Treatments Limited High velocity, low pressure process for making silica gels and microgels
CN104828831A (en) * 2015-06-05 2015-08-12 确成硅化学股份有限公司 Method for continuously producing white carbon black
DE102017123807A1 (en) * 2017-10-12 2019-04-18 Chemische Fabrik Budenheim Kg Improved process for carbon dioxide extraction of phosphates from raw materials
CN111661849A (en) * 2020-06-11 2020-09-15 昆明冶金高等专科学校 Method for preparing food-grade white carbon black by inorganic acid fractional precipitation method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006058855A2 (en) * 2004-12-01 2006-06-08 Ciba Specialty Chemicals Water Treatments Limited High velocity, low pressure process for making silica gels and microgels
WO2006058855A3 (en) * 2004-12-01 2006-09-08 Ciba Spec Chem Water Treat Ltd High velocity, low pressure process for making silica gels and microgels
US7504084B2 (en) 2004-12-01 2009-03-17 Ciba Specialty Chemicals Corporation High velocity, low pressure process for making silica gels and microgels
CN101068747B (en) * 2004-12-01 2010-12-22 西巴特殊化学水处理有限公司 High velocity, low pressure process for making silica gels and microgels
CN104828831A (en) * 2015-06-05 2015-08-12 确成硅化学股份有限公司 Method for continuously producing white carbon black
DE102017123807A1 (en) * 2017-10-12 2019-04-18 Chemische Fabrik Budenheim Kg Improved process for carbon dioxide extraction of phosphates from raw materials
CN111661849A (en) * 2020-06-11 2020-09-15 昆明冶金高等专科学校 Method for preparing food-grade white carbon black by inorganic acid fractional precipitation method

Also Published As

Publication number Publication date
CA2300615C (en) 2009-08-25

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EEER Examination request
MKEX Expiry

Effective date: 20200310