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New heterogeneous Pb oxide catalysts for lactide production from an azeotropic mixture of ethyl lactate and water

Paper ID Volume ID Publish Year Pages File Format Full-Text
49453 46745 2014 5 PDF Available
Title
New heterogeneous Pb oxide catalysts for lactide production from an azeotropic mixture of ethyl lactate and water
Abstract

•We investigated new heterogeneous catalysts for producing lactide from ethyl lactate.•Pb oxides were unique and efficient heterogeneous catalysts for this reaction.•PbO catalyst worked well for ethyl l-lactate in the presence of water.•PbO catalyst was not leached out during reaction and recovery process.•Lactide was produced from fermentation broth of ammonium lactate using PbO catalyst.

The heterogeneous PbO, PbO2 and Pb3O4 gave the comparable oligomer yield, oligomer Mw, lactide yield and l-lactide selectivity from ethyl l-lactate with the conventional homogeneous Sn(Oct)2. PbO was also active for ethyl l-lactate containing water as an impurity in distillation process, while Sn(Oct)2 was not active in that condition. No leaching of PbO catalyst was observed during the reaction as well as the recovery process. The recovered catalyst showed no notable loss of activity. By combining this PbO-based catalyst technology with the advanced precipitation process for producing l-ethyl lactate from ammonium l-lactate, l-lactide could be selectively produced in high yield.

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Keywords
JJTUDXZGHPGLLC-UHFFFAOYSA-N; JVTAAEKCZFNVCJ-UHFFFAOYSA-N; GZCGUPFRVQAUEE-SLPGGIOYSA-N; LZCLXQDLBQLTDK-UHFFFAOYSA-N; RZOBLYBZQXQGFY-UHFFFAOYSA-NBiorefinery; Polylactic acid; Ethyl lactate; Lactide; Heterogeneous catalyst; PbO
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New heterogeneous Pb oxide catalysts for lactide production from an azeotropic mixture of ethyl lactate and water
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 56, 5 November 2014, Pages 179–183
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us