METHOD OF PRODUCING PRECIPITATED SILICON DIOXIDE, INCLUDING MEMBRANE CONCENTRATION STEP Russian patent published in 2016 - IPC C01B33/193

Abstract RU 2575222 C1

FIELD: chemistry.

SUBSTANCE: silicate reacts with an acidifying agent to obtain a suspension of precipitated silicon dioxide (S1) followed by a separation step to obtain a cake. The said cake is disintegrated to obtain a suspension of precipitated silicon dioxide (S2) and drying. According to the invention, membrane concentration is performed between the disintegration step and the drying step.

EFFECT: high efficiency of the process while preserving the quality of the product.

13 cl, 2 tbl, 3 ex

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RU 2 575 222 C1

Authors

Neve Sil'Ven

Pino Ann-Lor

Dates

2016-02-20—Published

2013-03-21—Filed