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US 10,307,745 B2Granted
Catalysts for making acrylic acid from lactic acid or its derivatives in liquid phase
AssigneeThe Procter & Gamble Company
InventorsJakob Albert, Peter Wasserscheid, Nicola Taccardi, Jens Nagengast, Matthias Kehrer, Julian Kadar, Dimitris Ioannis Collias
Life of this patent
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Abstract
Catalysts for the dehydration of lactic acid, lactic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof in liquid phase comprising an ionic liquid (IL) and an acid are provided.
Claims9
A molten salt catalyst comprising an ionic liquid (IL) and an acid;
- wherein said IL is ethyltriphenylphosphonium bromide ([EtPPh3]Br);
- wherein said acid is soluble in said IL and selected from the group consisting of Lewis acid, Brønsted acid, and mixtures thereof;
- wherein said Lewis acid is selected from the group consisting of CaBr2, MgBr2, AlBr3, CuBr2, and mixtures thereof;
- and wherein said Brønsted acid has a pKa less than about 5 in water at 25° C.
1 more element
A molten salt catalyst comprising an ionic liquid (IL) and an acid;
- wherein said IL is tetrabutylphosphonium bromide ([PBu4]Br);
- wherein said acid is soluble in said IL and selected from the group consisting of Lewis acid, Brønsted acid, and mixtures thereof;
- wherein said Lewis acid is selected from the group consisting of CaBr2, MgBr2, AlBr3, CuBr2, and mixtures thereof;
- and wherein said Brønsted acid is pyrophosphoric acid (H4P2O7).
1 more element
A molten salt catalyst comprising an ionic liquid (IL) and an acid;
- wherein said IL is tetrabutylphosphonium bromide ([PBu4]Br);
- and wherein said acid is selected from the group consisting of sulfuric acid (H2SO4), phosphoric acid (H3PO4), and 2-bromopropionic acid (2-BrPA).
Dependencies are inferred from the claim text.