Continuous Production of Activated Silica With Carbon Dioxide Gas

Andrews, Robert V.

doi:10.1002/j.1551-8833.1954.tb16036.x

Journal AWWA

1954

DOI: 10.1002/j.1551-8833.1954.tb16036.x

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Continuous Production of Activated Silica With Carbon Dioxide Gas

Robert V. Andrews¹

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1955

1956

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“…I N a previous study (1), the continuous production of activated silica with pure carbon dioxide gas has been discussed. Because flue gases from boiler plants and exhaust gases from diesel engines are common free sources of carbon dioxide, experiments were conducted using gases of this type for the continuous preparation of activated silica, and a set of process variables was established which could be used for the commercial preparation of activated silica.…”

mentioning

confidence: 99%

Continuous Production of Activated Silica With Low‐CO₂ Gases

Andrews¹,

Burdett²

1956

Journal AWWA

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mentioning

confidence: 99%

Continuous Production of Activated Silica With Low‐CO₂ Gases

Andrews¹,

Burdett²

1956

Journal AWWA

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Experience With Activated‐Silica Treatment

Klinger¹

1955

Journal AWWA

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Factors influencing the time of gelation of acid ‘modified’ sodium silicate

Heald¹,

Coates²,

Edwards³

1955

J. Appl. Chem.

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In one method of preparing ‘modified’ sodium silicate, a coagulant of increasing importance in water treatment processes, a solution of sodium silicate is treated with an acid, allowed to age and finally diluted according to a recommended procedure. The changes which occur during the ageing time are retarded by the final dilution. If the ageing time is much too long, the product gels; if too short, the diluted sol is a less efficient coagulant than one aged for the correct time. The time of gelation is therefore of considerable importance in the technology of making the reagent. The literature contains scattered references to the effect of such variables as concentration on the gel time of ‘modified’ sodium silicate, but few systematic measurements appear yet to have been reported on the influence of other factors. The results of such a study are given in this report. The data are set out in graphical form from which most of the facts required in practice can be obtained. The conclusions of especial interest are: (a) silica sols exhibit the greatest instability when the pH value is about 7.5 whatever acid is used for neutralization; (b) the presence of neutral salts hastens gelation; (c) the effect of using sodium silicate containing more Na2O (i.e. of a lower grade) and neutralizing to the same residual alkalinity can be explained quantitatively in terms of the extra sodium salt introduced by such a method of preparation.

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Continuous Production of Activated Silica With Carbon Dioxide Gas

Cited by 3 publications

References 3 publications

Continuous Production of Activated Silica With Low‐CO₂ Gases

Continuous Production of Activated Silica With Low‐CO₂ Gases

Experience With Activated‐Silica Treatment

Factors influencing the time of gelation of acid ‘modified’ sodium silicate

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About

Continuous Production of Activated Silica With Carbon Dioxide Gas

Cited by 3 publications

References 3 publications

Continuous Production of Activated Silica With Low‐CO2 Gases

Continuous Production of Activated Silica With Low‐CO2 Gases

Experience With Activated‐Silica Treatment

Factors influencing the time of gelation of acid ‘modified’ sodium silicate

Contact Info

Product

Resources

About

Continuous Production of Activated Silica With Low‐CO₂ Gases

Continuous Production of Activated Silica With Low‐CO₂ Gases