Catalysts and Supports for Conversion of Lactic Acid to Acrylic Acid and 2,3-Pentanedione

Gunter, Garry C.; Langford, Robert H.; Jackson, James E.; Miller, Dennis J.

doi:10.1021/ie00042a035

Cited by 74 publications

(76 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the dehydration process, lactic acid can be reduced by reductive materials to form propanoic acid. What needs to be emphasized is that the reductive materials include activated carbon support (Gunter et al, 1995), formed coke on catalysts surfaces or hydrogen originated during dehydration process. In Table 5, molar yield of acrylic acid from 26 wt.% lactic acid is only 0.7% at 400…”

Section: Effect Of Contact Time On Lactic Acid Dehydrationmentioning

confidence: 99%

“…Furthermore, as the application of anaerobic lacto-bacteria (Bai et al, 2003), energy saving is achieved in this process. Lactic acid is capable to produce various chemicals such as acrylic acid, propanoic acid, acetaldehyde, 2,3-pentanedione (Gunter et al, 1994(Gunter et al, , 1995Waldley et al, 1997;Varadarajan and Miller, 1999), as well as biodegradable poly lactic acid. All the products from lactic acid are industrial chemicals, and the products can be separated by matured industrial process.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Catalytic dehydration of lactic acid to acrylic acid over sulfate catalysts

2008

View full text Add to dashboard Cite

The production of acrylates from biomass-originated lactic acid is of extraordinary importance to overcome the increasing worldwide shortage of petroleum. In this work, the catalytic dehydration of lactic acid to acrylic acid was carried out over calcium sulfate catalyst with cupric sulfate and phosphates as promoters. The mass ratio of m(CaSO 4 )/m(CuSO 4 )/m(Na 2 HPO 4 )/m(KH 2 PO 4 ) is 150.0:13.8:2.5:1.2. In the dehydration of lactic acid, effects of carrier gas, calcination temperature for catalyst, concentration of lactic acid as well as contact time are discussed in detail. With carbon dioxide as carrier gas, the highest acrylic acid yield of 63.7% is achieved from 26 wt.% lactic acid at 330 • C and 88 s contact time.La production des acrylatesà partir d'acide lactique issu de biomasse est d'une extrême importance compte tenu du manque croissant de pétrole dans le monde. Dans ce travail, la déshydratation catalytique de l'acide lactique en acide acrylique aété effectuée sur un catalyseur de sulfate de calcium avec du sulfate cuprique et des phosphates comme promoteurs. Les rapports de masse de m(CaSO 4 ), m(CuSO 4 ), m(Na 2 HPO 4 ), m(KH 2 PO 4 ) sont de 150,0, 13,8, 2,5 et 1,2, respectivement. Dans la déshydratation de l'acide lactique, les effets du gaz porteur, de la température de calcination du catalyseur, de la concentration de l'acide lactique ainsi que du temps de contact sont examinés en détail. Avec le dioxyde de carbone comme gaz transporteur, le rendement en acide acrylique le plusélevé obtenu est de 63,7%,à partir d'acide lactiqueà 26% massique, 330 • C et un temps de contact de 88 secondes.

show abstract

Section: Effect Of Contact Time On Lactic Acid Dehydrationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Catalytic dehydration of lactic acid to acrylic acid over sulfate catalysts

2008

View full text Add to dashboard Cite

show abstract

“…Lactic acid has been known as one of the most reactive species because it has both hydroxyl and carboxy functional groups. It can be converted into a variety of chemicals through polymerization [4], condensation [5][6][7], dehydration [8], esterification [9,10], and oxidation [11].…”

Section: Introductionmentioning

confidence: 99%

Catalytic conversion of lactic acid into propylene glycol over various metals supported on silica

et al. 2011

View full text Add to dashboard Cite

Catalytic hydrogenation of lactic acid to propylene glycol was performed over various metals (Ag, Co, Cu, Ni, Pt, and Ru) supported on silica prepared by an incipient wetness impregnation method. The loading amount of each metal was 5 wt%. Crystallinity of the synthesized catalysts was investigated by X-ray diffraction (XRD), and the BET method was utilized to examine the surface area. Pore volume and pore size of catalysts were determined using BJH analysis of the N 2 adsorption isotherm. Particle sizes of various metals were determined from transmission electron microscopy (TEM) images. The catalytic activity was found to be strongly dependent on the supported metal. Among catalysts tested, Ru/SiO 2 showed the highest propylene glycol yield. The yield of propylene glycol increased with pressure, and the highest yield was achieved at 130°C.

show abstract

“…Carbon monoxide is also used to synthesize propionaldehyde and other aldehydes through hydroformylation reaction of ethylene and other alkenes [14][15][16][17]. As a platform molecule, LA is utilized to produce many value added chemicals such as acrylic acid [18][19][20][21][22][23], acetaldehyde [8], 2,3-pentanedione [24,25], propionic acid [26], pyruvic acid [27] and polylactic acid [28]. Except for corn starch, rich and inexpensive biomass materials such as cellulose [29], sugars [30], and sorbitol [31] have also been used to produce LA.…”

Section: Introductionmentioning

confidence: 99%