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2 032 618

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C1

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IPC

(21) (22)

Application

5028357/26, 1992-02-21

(22)

Actual filing date

1992-02-21

(45)

Published

1995-04-10

(72)

Inventor

Shabanova N.A.Medvedkova N.G.Silos I.V.

(73)

Holder

Moskovskij Khimiko-Tekhnologicheskij Institut Im.D.I.Mendeleeva

PROCESS FOR PREPARING OF CONCENTRATED PASTE OF COLLOIDAL SILICA Russian patent published in 1995 - IPC

Abstract RU 2032618 C1

FIELD: inorganic chemistry. SUBSTANCE: a silica hydrosol is mixed with an anionic polyelectrolyte solution in an alkali me dium and the precipitated phase is then separated. The anionic water-soluble polymer is used as a polyelectrolyte and after separation of the precipitated phase at least 0.15 mole of urea is added thereto per 100 g of SiO2. EFFECT: more efficiency preparation process. 1 tbl

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RU 2 032 618 C1

Authors

Shabanova N.A.

Medvedkova N.G.

Silos I.V.

Dates

1995-04-10—Published

1992-02-21—Filed

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