Treatment of hydrogels

  • Inventors:
  • Assignees: Phillips Petroleum Co
  • Publication Date: April 19, 1967
  • Publication Number: GB-1066181-A

Abstract

An oxide hydrogel is treated with one of the following compounds: <FORM:1066181/C1/1> where R1 is H, Me, or Et; R2 is alkyl C1-C4; R3 is alkylene C2 or C3; R4 is alkylene C1-C3; X i Cl, Br, 1, or CN; then dried at below 500 DEG F. and calcined at above 500 DEG F. Specified oxides are silica, alumina, thoria, zirconia, boria, titania, and mixtures, e.g. alumina-silica. The hydrogel may first be washed with water or dilute aqueous ammonium nitrate or chloride, and the slurry is then treated for 0.1-100 hrs. at 0-200 DEG F., e.g. by agitating in a kettle, or by continuously treating in a bed with fresh or recycled treating agent. 2-50 parts of treating agent are used per part of hydrogel. The treated gel may be oven-or heat lamp-dried, and calcined for 0.5-25 hrs. at 500-1500 DEG F. It may be impregnated with chromium oxide and used as a catalyst in the polymerization of a -olefines. Silica gel is obtained from water glass by acidifying with H2SO4 (Examples 1-4) or HNO3 (Example 5) or by passing down an acid cation exchange resin and gelling by adding NH4OH, HCl, and water glass alternately (Example 6).ALSO:A catalyst for the polymerization of a -olefines at 100-450 DEG F., e.g. in the presence of cyclohexane diluent, comprises an oxide hydrogel, e.g. SiO2, which has been treated with methanol, acetone, or isopropanol, and then dried, calcined, impregnated with CrO3, and activated. Other a -olefines referred to are propylene, 1-butene, 1 - pentene, 1 - hexene, 1 - heptene, 1-octene, 4-methyl-1-pentene, butadiene, and isoprene. Other oxides are Al2O3, ThO2, ZrO2, B2O3, TiO2 and mixtures, e.g. Al2O3-SiO2.ALSO:An oxide hydrogel for use as a catalyst in the polymerisation of a -olefins, is treated with one of the following compounds: CH3-CO-R1; R2-OH; R1-(OR3)n-OH; <FORM:1066181/B1-B2/1> (R1)-R4-OH; X-R3-OH; where R1 is H, Me, or Et; R2 is alkyl C1-C4; R3 is alkylene C2 or C3; R4 is alkylene C1-C3; X is Cl Br, I, or CN; then dried at below 500 DEG F, calcined at above 500 DEG F, impregnated with a catalytic compound, and activated. Specified oxides are silica, alumina, thoria, zirconia, boria, titania, and mixtures, e.g. alumina-silica. The hydrogel may first be washed with water or dilute aqueous ammonium nitrate or chloride, and the slurry is then treated for 0.1-100 hrs at 0-200 DEG F, e.g. by agitating in a kettle, or by continuously treating in a bed with fresh or recycled treating agent. 2-50 parts of treating agent are used per part of hydrogel. The treated gel may be oven-or heat lamp-dried, and calcined for 0.5-25 hrs. at 500-1500 DEG F. It may be impregnated with chromium oxide, or an aqueous solution of a Cr compound, and activated at 500-1600 DEG F.

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Cited By (3)

    Publication numberPublication dateAssigneeTitle
    US-7598201-B2October 06, 2009Basell Polyolefine GmbhProcess for preparing a support for olefin polymerization catalysts
    WO-2007068365-A1June 21, 2007Basell Polyolefine GmbhProcess for preparing a support for olefin polymerization catalysts
    WO-2007068366-A1June 21, 2007Basell Polyolefine GmbhProcess for preparing a support for olefin polymerization catalysts