US 6,541,598 B2 · Composition comprising titanium and process therewith

Abstract

A composition that can be used as catalyst is disclosed. The composition comprises, or is produced by combining, (A) a titanium compound; (B) either (i) a complexing agent, (ii) a combination of a complexing agent, hypophosphorous acid or a salt thereof, and optionally a solvent, a zirconium compound, or both, (iii) combinations thereof; (C) a phosphorus compound; and optionally a solvent. Also disclosed is a process that can be used for producing a polyester. The process comprises contacting, in the presence of an esterification or transesterification or polycondensation catalyst composition and a phosphorus compound, a carbonyl compound and an alcohol under a condition suitable for esterification, transesterification, or polymerization. Further disclosed is a process to make polyester with reduced insoluble particles or solids using a phosphorus compound other than the commonly used phosphoric acid.

Claims34

Dependent claims

A process comprising contacting, in the presence of a catalyst, a carbonyl compound with an alcohol wherein said catalyst comprises or is produced by combining (1) a titanium compound, a solubility promoter, a phosphorus source, optionally a first solvent, optionally a phosphorus compound, and optionally a second solvent;

(2) a titanium compound, a glycol, and either a phosphorus compound or water;
or (3) combinations of (1) and (2);
said solubility promotor is selected from the group consisting of ortho silicates, ortho zirconates, a combinations thereof;
said phosphorus source is selected from the group consisting of a phosphonic acid, a phosphinic acid, a phosphine, and combinations of two or more thereof;
and said phosphorus compound is selected from the group consisting of a polyphosphoric acid or a salt thereof, a phosphonate ester, a pyrophosphoric acid or salt thereof, a pyrophosphorous acid or salt thereof, and combinations of two or more thereof.

2 more elements

A process comprising contacting, in the presence of a catalyst, a carbonyl compound with an alcohol wherein said catalyst composition comprises or is produced by combining (i) tetra isopropyl titanate and lactic acid, (ii) tetra-isopropyl titanate, lactic acid, and sodium hypophosphite;

(iii) tetra isopropyl titanate, ethylene glycol, and water, or (iv) tetra isopropyl titanate, ethylene glycol, and either potassium tripolyphosphate, di(polyoxyethylene)hydroxymethyl phosphonate, or triethyl phosphonoacetate.

A process comprising contacting, in the presence of a metal or metal compound and a phosphorus compound, a carbonyl compound with an alcohol wherein

said metal or metal compound is selected from the group consisting of TiO2, antimony oxide, antimony glycolate, antimony acetate, manganese acetate, zinc oxide, zinc acetate, cobalt acetate, aluminum compound, germanium compound, titanium compound, and combinations of two or more thereof;
said phosphorus compound is selected from the group consisting of a polyphosphoric acid or a salt thereof, a phosphonate ester, a pyrophosphoric acid or salt thereof, a pyrophosphorous acid or salt thereof, and combinations of two or more thereof;
and
said polyphosphoric acid has the formula of Hn+2PnO3+1;
said phosphonate ester is selected from the group consisting of (R1O)2P(O)ZCO2R1, di(polyoxyethylene)hydroxymethyl phosphonate, and combinations thereof;
n is ≧2;
each R1 is independently selected from the group consisting of H, C1-4 alkyl, and combinations thereof;
and Z is selected from the group consisting of C1-5 alkylene, C1-5 alkylidene, and combinations thereof.

5 more elements

Dependencies are inferred from the claim text.

Composition comprising titanium and process therewith

Life of this patent

Composition comprising titanium and process therewith

Life of this patent

Abstract

Claims34