Methods for the production of alpha, beta-unsaturated carboxylic acids and salts thereof
AssigneeChevron Phillips Chemical Company LP
InventorsMark L. Hlavinka, Max P. McDaniel
Life of this patent
Estimating the term…
Abstract
Processes for producing an α,β-unsaturated carboxylic acid, such as acrylic acid, or a salt thereof, using solid promoters are disclosed. The solid promoters can be certain solid oxides, mixed oxides, and clays, illustrative examples of which can include alumina, zirconia, magnesia, magnesium aluminate, sepiolite, and similar materials.
Claims20
A process for performing a metallalactone elimination reaction, the process comprising:
- (1) calcining a solid promoter;
- (2) contacting
- (a) a metallalactone;
- (b) a diluent comprising a non-protic solvent;
- and
- (c) the solid promoter;
- and
- (3) forming an α,β-unsaturated carboxylic acid, or a salt thereof;
- wherein the molar yield of the α,β-unsaturated carboxylic acid, or the salt thereof, based on the metallalactone, is at least 5%.
A process for performing a metallalactone elimination reaction, the process comprising:
- (1) calcining a solid promoter;
- (2) contacting
- (a) a metallalactone;
- (b) a diluent;
- and
- (c) the solid promoter;
- and
- (3) forming an α,β-unsaturated carboxylic acid, or a salt thereof;
- wherein the molar yield of the α,β-unsaturated carboxylic acid, or the salt thereof, based on the metallalactone, is at least 5%;
- and
- wherein the solid promoter has a pore volume from 0.5 to 2.5 mL/g and a BET surface area from 100 to 750 m2/g.
A process for producing an α,β-unsaturated carboxylic acid, or a salt thereof, the process comprising:
- (I) calcining a solid promoter;
- (II) contacting
- (i) a transition metal-ligand complex, wherein the transition metal is nickel, palladium, or platinum, and the ligand is a neutral electron donor group or Lewis base;
- (ii) ethylene;
- (iii) carbon dioxide (CO2);
- (iv) a diluent;
- and
- (v) the solid promoter;
- and
- (III) forming the α,β-unsaturated carboxylic acid, or the salt thereof;
- wherein the molar yield of the α,β-unsaturated carboxylic acid, or the salt thereof, based on the transition metal-ligand complex, is at least 5%.
Dependencies are inferred from the claim text.