Obtaining levulinic acid and other products from sugars using heterogeneous catalysts

Reference:

The use of unused biomass in food production will play a major role in the future as a source of chemicals to replace those derived from mineral sources to create new bioproduct platforms as an alternative to reducing CO2 emissions. In this respect, levulinic acid plays an important role in this segment (one of the key substances – top twelve among the most potential) to have its manufacturing process developed due to its versatility as a raw material for the production of various products. However, the use of homogeneous and poorly selective catalysts in the production of this compound causes low yield and separation difficulties, increasing its production cost. In the present work the catalytic hydrolysis of sucrose, glucose, fructose, mannose and xylose was studied in the presence of heterogeneous acid catalysts (sulfonated styrene divinylbenzene resins, HZSM-5 zeolite and niobic acid) using a Parr reactor at 120 oC for 3 hours and the products were quantified by HPLC. Selectivity was found to depend on the type of sugar and the catalyst, with levulinic acid formed preferentially from fructose using proton resins, followed by sucrose. It is practically not formed from glucose, mannose and xylose with the tested catalysts. Sucrose undergoes inversion during the process. 5-HMF is an ever-present byproduct as it is an intermediate and formic acid a parallel co-product. High yield of furfural is obtained starting from xylose. To obtain a high yield of levulinic acid it is necessary to maximize the obtaining of 5-HMF previously.

Reference:
KIMURA, Vanessa Tiemi ; POÇO, João Guilherme Rocha; DERENZO, Silas; MATSUBARA, Rosa Mitiko Saito.; GOMES, Diego Zulkiewicz; MARCANTE, Amanda. Obtenção de ácido levulínico e outros produtos a partir de açúcares usando catalisadores heterogêneos. Brazilian Journal of Development, v.5, n.9, p.14804-14813, sept., 2019.

Access to the article on the journal website:
http://www.brjd.com.br/index.php/BRJD/article/view/3160/3061

Reference:
KIMURA, Vanessa Tiemi ; POÇO, João Guilherme Rocha; DERENZO, Silas; MATSUBARA, Rosa Mitiko Saito.; GOMES, Diego Zulkiewicz; MARCANTE, Amanda. Obtenção de ácido levulínico e outros produtos a partir de açúcares usando catalisadores heterogêneos. In: CONGRESSO BRASILEIRO DE ENGENHARIA QUÍMICA, 20., 2014, Florianópolis. Anais…

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