Organometallic catalyst and preparation thereof
AssigneeThe University of Sydney
InventorsFariba Dehghani, Zhong Xia
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method for producing an organometallic catalyst and an organometallic catalyst when produced by the method. The method comprises the steps of combining a polycarboxylic acid or anhydride and a metal-oxide, metal-hydroxide or metal-salt with a solvent at a temperature and pressure at which the solvent exists as a supercritical or near-critical fluid. The polycarboxylic acid or anhydride is reacted with the metal-oxide, metal-hydroxide or metal-salt for sufficient time and under sufficient temperature and pressure to produce the organometallic catalyst. The present invention also relates to a process for making a poly(alkylene carbonate) in the presence of a catalytic amount of the organometallic catalyst produced by the method.
Claims15
A method for producing an organometallic catalyst comprising:
- combining a polycarboxylic acid or anhydride and a metal-oxide, metal-hydroxide or metal-salt with a solvent at a temperature and pressure at which the solvent exists as a supercritical or near-critical fluid;
- and
- reacting said polycarboxylic acid or anhydride with said metal-oxide, metal-hydroxide or metal-salt for sufficient time and under sufficient temperature and pressure to produce said organometallic catalyst.
A formulation for producing an organometallic catalyst comprising:
- a solvent in its supercritical or near-critical state,
- a polycarboxylic acid or anhydride and
- a metal-oxide, metal-hydroxide or metal-salt.
A method for controlling one or more crystal characteristics of an organometallic material during synthesis of the organometallic material, wherein said characteristics are selected from the group consisting of crystallinity, particle size, shape, polymorphism and porosity,
- said method comprising:
- reacting a polycarboxylic acid or anhydride with a metal-oxide, metal-hydroxide or metal-salt in the presence of a solvent for sufficient time and under sufficient temperature and pressure to produce said organometallic material, wherein said solvent exists either as a supercritical or a near-critical fluid thereby controlling the crystal characteristics of the produced organometallic material.
Dependencies are inferred from the claim text.