An integrated process to produce vanillin and lignin-based polyurethanes from Kraft lignin

• Type: Another Publication in an International Scientific Journal
• Date: 2009

Authors

Borges da Silva, EAB (Author) Other; Zabkova, M (Author) Other; Araujo, JDP (Author) FEUP; Cateto, CA (Author) Other; Barreiro, MF (Author) Other; Belgacem, MN (Author) Other; Alírio Rodrigues (Author) FEUP

Journal

Title: Chemical Engineering Research and Design

Vol. 87 No. 12A

Pages: 1276-1292

ISSN: 0263-8762

Publisher: Institute of Chemical Engineers

Indexing

ISI Web of Knowledge - 177 Citations

ISI Web of Science

Scopus - 288 Citations

INSPEC

COMPENDEX

Scientific classification

FOS: Engineering and technology > Chemical engineering

CORDIS: Technological sciences > Engineering > Chemical engineering

Other information

Authenticus ID: P-003-FZ2

DOI: 10.1016/j.cherd.2009.05.008

Abstract (EN): The aim of this manuscript is to present an integrated process that includes reaction and separation steps for producing vanillin and lignin-based polyurethanes from Kraft lignin. it provides details about lignin oxidation and subsequent vanillin recovery, as well as, the synthesis of lignin-based polyurethanes. The oxidation of Kraft lignin in alkaline medium has been carried out in a batch reactor and the optimum operational conditions for vanillin production obtained. The feasibility of a continuous process for vanillin production has been analyzed using a structured bubble column reactor. The generated reaction stream (degraded lignin and sodium vanillate) was further subjected to an ultrafiltration process to recover the vanillate. An ion-exchange process allows recovering the vanillin by passing the vanillate solution through a column packed with an ion-exchange resin in H+ form. The remaining lignin can act as a raw material to produce polyurethanes and/or biofuels. In this work the first approach was explored.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 17