PREPARATION OF SILICA-ALUMINA COMPOSITION

Number of patents in Portfolio can not be more than 2000

United States of America Patent

APP PUB NO 20140187411A1
SERIAL NO

14132801

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

A process for preparing a silica-alumina composition containing of from 30 to 70% wt silica and of from 70 to 30% wt of alumina, which process comprises (a) preparing an aqueous mixture containing aluminum sulfate and having a pH in the range of from 1.0 to 6.5; (b) adding alkali metal aluminate to the mixture obtained in step (a) to increase the pH of the mixture to within the range of from 7.1 to 12;

    (c) adding aluminum sulfate to the mixture obtained in step (b) to lower the pH of the mixture to within the range of from 1.5 to 6.5; (d) adding alkali metal silicate to the mixture obtained in step (c) to increase the pH of the mixture to within the range of from 6.5 to 11,(e) adding aluminum sulfate to the mixture obtained in step (d) to lower the pH of the mixture to within the range of from 1.5 to 6.5; wherein the final steps of the preparation process are(w) adding alkali metal silicate to a silica-alumina mixture obtained by step (a)-(e) to increase the pH of the mixture to within the range of from 5.0 to 8.5,(x) adding to the mixture obtained in step (w) (i) alkali metal aluminate to change the pH of the mixture to of from 7.8 to 12 and (ii) aluminum sulfate to change the pH of the mixture to within the range of from 1.5 to 7.7, wherein step (i) can precede or succeed step (ii),(y) treating the mixture obtained in step (x) with an alkaline solution having a pH of from 7.5 to 12, and(z) recovering a precipitate solid from the mixture obtained in step (y) to obtain a silica-alumina composition containing of from 30 to 70% wt silica and of from 70 to 30% wt of alumina.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
PQ CORPORATIONVALLEY FORGE PA

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Alkema, Sjoerd Delfzijl, NL 3 6
Cooper, David Allen Morrisville, US 10 23
Domokos, Laszlo Amsterdam, NL 12 166
Kijlstra, Wiebe Sjoerd Amsterdam, NL 7 20
Ong, Lay Hwa Amsterdam, NL 7 9
Winter, Ferry Amsterdam, NL 33 38

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation