Methods for the production of α,β-unsaturated carboxylic acids and salts thereof
AssigneeChevron Phillips Chemical Company LP
InventorsMark L. Hlavinka, Max P. McDaniel
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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.
Claims19
A process for performing a metallalactone elimination reaction, the process comprising:
- (1) forming a reaction mixture consisting essentially of
- (a) a metallalactone;
- (b) a diluent;
- and
- (c) a solid promoter selected from the group consisting of alumina, zirconia, magnesia, magnesium aluminate, and sepiolite, or a combination thereof;
- and
- (2) 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 producing an α,β-unsaturated carboxylic acid, or a salt thereof, the process comprising:
- (1) contacting
- (a) a metallalactone;
- (b) a diluent;
- and
- (c) a solid oxide;
- (2) forming an adduct of an α,β-unsaturated carboxylic acid adsorbed onto the solid oxide;
- and
- (3) contacting the adduct adsorbed onto the solid oxide with an acid to produce the α,β-unsaturated carboxylic acid, or the salt thereof.
A process for producing an α,β-unsaturated carboxylic acid, or a salt thereof, the process comprising:
- (I) forming a reaction mixture consisting essentially of
- (i) a transition metal-ligand complex;
- (ii) an olefin;
- (iii) carbon dioxide (CO2);
- (iv) a diluent;
- and
- (v) a solid promoter selected from the group consisting of magnesium aluminate, calcium aluminate, zinc aluminate, zirconium aluminate, sodium aluminate, magnesium zirconium oxide, sodium zirconium oxide, calcium zirconium oxide, lanthanum chromium oxide, barium titanium oxide, alumina, zirconia, magnesia, magnesium aluminate, and sepiolite, or a combination thereof;
- and
- (II) 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.