Methods of 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
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Abstract
Methods for making acrylic acid, acrylic acid derivatives, or mixtures thereof by contacting a feed stream containing lactic acid, lactic acid derivatives, or mixtures thereof with a molten salt catalyst comprising an ionic liquid (IL) and an acid in liquid phase are provided.
Claims9
A method of making acrylic acid, acrylic acid derivatives, or mixtures thereof comprising contacting a feed stream comprising lactic acid, lactic acid derivatives, or mixtures thereof with a molten salt catalyst in a reactor at a temperature;
- wherein said molten salt catalyst comprises an ionic liquid (IL) and a Lewis acid that is soluble in the IL;
- and whereby acrylic acid, acrylic acid derivatives, or mixtures thereof are produced as a result of said contacting in said reactor;
- wherein said IL has a bromide (Br-) anion and a phosphonium cation;
- wherein said contacting is performed at atmospheric pressure;
- wherein said contacting proceeds in the presence of a strip gas.
A method of making acrylic acid comprising contacting a feed stream comprising 2-acetoxypropionic acid (2-APA) with a molten salt catalyst in a reactor at 220° C.;
- wherein said molten salt catalyst comprises [EtPPh3]Br and HBr at a molar ratio of about 4 to 1 respectively;
- wherein said contacting proceeds under atmospheric pressure;
- and whereby acrylic acid is produced as a result of said contacting in said reactor with an acrylic acid yield of at least about 25 mol %;
- wherein said contacting proceeds in the presence of a strip gas.
Dependencies are inferred from the claim text.