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US 2020/0392264 A1Published application
Aqueous Titanation of Cr/Silica Catalysts by the Use of Acetylacetonate and Another Ligand
AssigneeChevron Phillips Chemical Company LP
InventorsMax P. MCDANIEL, Kathy S. CLEAR, William C. ELLIS, Deloris R. GAGAN
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Abstract
A method comprising contacting a silica support with a titanium-containing solution to form a titanated silica support, wherein the titanium-containing solution comprises a solvent; a ligand comprising a glycol, a carboxylate, a peroxide, or a combination thereof; and a titanium compound having the formula Ti(acac)2(OR)2, wherein “acac” is acetylacetonate and wherein each R independently is ethyl, isopropyl, n-propyl, isobutyl, or n-butyl.
Claims21
A pre-catalyst composition comprising:
- a) a silica support comprising silica wherein an amount of silica is in a range of from about 70 wt. % to about 95 wt. % based upon a total weight of the silica support;
- b) a titanium-containing compound wherein an amount of titanium is in a range of from about 0.1 wt. % to about 10 wt. % based upon the total weight of the silica support;
- and
- c) a ligand selected from the group consisting of a glycol, a carboxylate and a peroxide;
- wherein
- (i) the glycol is in an amount ranging from about 1 mole to about 4 moles per mole of titanium present in the pre-catalyst;
- (ii) the carboxylate is in an amount ranging from about 0.1 mole to about 1.0 moles per mole of titanium present in the pre-catalyst;
- and
- (iii) the peroxide is in an amount ranging from about 1 mole to about 4 moles per mole of titanium present in the pre-catalyst.
6 more elements
11-20. (canceled)
A pre-catalyst composition comprising:
- a) a silica support comprising silica wherein an amount of silica is in a range of from about 70 wt. % to about 95 wt. % based upon a total weight of the silica support;
- b) a titanium-containing compound wherein an amount of titanium is in a range of from about 0.1 wt. % to about 10 wt. % based upon the total weight of the silica support and wherein the titanium-containing compound has a formula Ti(acac)2(OR)2, wherein “acac” is acetylacetonate and wherein each R independently is ethyl, isopropyl, n-propyl, isobutyl, or n-butyl;
- c) a chromium-containing compound wherein an amount of chromium is in the range of from about 0.01 wt. % to about 10 wt. % based on the total weight of the silica support;
- and
- d) a ligand selected from the group consisting of a glycol, a carboxylate and a peroxide;
- wherein
- (i) the glycol is in an amount ranging from about 1 mole to about 4 moles per mole of titanium present in the pre-catalyst;
- (ii) the carboxylate is in an amount ranging from about 0.1 mole to about 1.0 moles per mole of titanium present in the pre-catalyst;
- and
- (iii) the peroxide is in an amount ranging from about 1 mole to about 4 moles per mole of titanium present in the pre-catalyst.
7 more elements
Dependencies are inferred from the claim text.