Catalytic features of Nb-based nanoscopic inorganic fluorides for an efficient one-pot conversion of cellulose to lactic acid

2018 ◽  
Vol 306 ◽  
pp. 102-110 ◽  
Author(s):  
Marian Verziu ◽  
Marion Serano ◽  
Bogdan Jurca ◽  
Vasile I. Parvulescu ◽  
Simona M. Coman ◽  
...  
Keyword(s):  
Lactic Acid ◽  
One Pot ◽  
Inorganic Fluorides

scholarly journals Production of lactic acid from cellulose using solid catalyst

2019 ◽  
Vol 268 ◽  
pp. 07006 ◽  
Author(s):  
Sujitra Doungsri ◽  
P. Rattanaphanee ◽  
Aatichat Wongkoblap
Keyword(s):  
Lactic Acid ◽  
Batch Reactor ◽  
Nitrogen Pressure ◽  
Reaction Pathways ◽  
Solid Catalyst ◽  
One Pot ◽  
Solid Catalysts ◽  
Platform Chemicals ◽  
Acid And Base ◽  
The One

Lactic acid (LA), one of the important biomass derived platform chemicals, has been used in food and chemical industries, especially in biodegradable polymer as polylactic acid (PLA). The aim of this work is to study the one-pot production of LA from cellulose by using different solid catalysts. The reaction was conducted in a high pressure batch reactor and the catalyst used in this study were ZrO2 and Al2O3. The reaction was carried out at temperature of 200oC for 6 hr. and under nitrogen pressure of 1 MP. It was found that the production yield of LA were 8.02% and 6.63%, when the ZrO2 and Al2O3 catalysts were used respectively. The result indicated that the ZrO2 may effect on the LA production because of the acid and base sites of the ZrO2. Therefore, the reaction pathways for conversion of cellulose into lactic acid have been investigated, and developed the new conditions to achieve the higher yield.

scholarly journals A Study on the Kinetics and Mechanism of the One-Pot Formation of 3,4,5-Substituted Furan-2(5H)-Ones in the Presence of Lactic Acid: Effect of Different Substituents

2018 ◽  
Vol 43 (3-4) ◽  
pp. 286-299 ◽  
Author(s):  
Osman Asheri ◽  
Sayyed Mostafa Habibi-Khorassani ◽  
Mehdi Shahraki
Keyword(s):  
Lactic Acid ◽  
Activation Parameters ◽  
General Mechanism ◽  
Common Mechanism ◽  
Substituted Anilines ◽  
One Pot ◽  
Isokinetic Relationship ◽  
Zero Order Kinetics ◽  
Different Temperatures ◽  
The One

The kinetics of the reaction between para-substituted anilines and dimethyl acetylenedicarboxylate (DMAD) with derivatives of benzaldehyde for the one-pot formation of 3,4,5-substituted furan-2(5 H)-ones in the presence of lactic acid as a catalyst have been studied spectrophotometrically at different temperatures. A mechanism involving four steps was proposed for the reactions, all of which followed second-order kinetics. The partial orders with respect to substituted aniline and DMAD were one and one and the reactions revealed zero-order kinetics for benzaldehyde and its derivatives. Changing of substituents on benzaldehyde left rates of reaction unaffected. However, various substituents on aniline showed that para electron-withdrawing groups decreased the rate of reaction. According to investigation of an isokinetic relationship, a common mechanism exists for all studied substituents and a general mechanism can be formulated. Kinetic values ( k and Ea) and associated activation parameters (Δ G‡, Δ S‡ and Δ H‡) of the reactions were determined.

One-Pot, Solvent- and Catalyst-Free Synthesis of Polyphosphoramide as an Eco-Benign and Effective Flame Retardant for Poly(lactic acid)

2020 ◽  
Vol 8 (44) ◽  
pp. 16612-16623
Author(s):  
Jiabing Feng ◽  
Xiaodong Xu ◽  
Zhiguang Xu ◽  
Hongyan Xie ◽  
Pingan Song ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Flame Retardant ◽  
Poly Lactic Acid ◽  
One Pot ◽  
Catalyst Free

A One-Pot, Two-Step Enzymatic Synthesis of L-Lactic Acid from Acetaldehyde

2002 ◽  
Vol 31 (7) ◽  
pp. 758-759 ◽  
Author(s):  
Masaya Miyazaki ◽  
Kazuya Ogino ◽  
Mitsukuni Shibue ◽  
Hiroyuki Nakamura ◽  
Hideaki Maeda
Keyword(s):  
Lactic Acid ◽  
Enzymatic Synthesis ◽  
One Pot

One-pot synthesis of poly(lactic acid) with terminal methacrylate groups for the adjustment of mechanical properties of biomaterials

2017 ◽  
Vol 27 (6) ◽  
pp. 574-576 ◽  
Author(s):  
Ilia V. Averianov ◽  
Viktor A. Korzhikov-Vlakh ◽  
Yulia E. Moskalenko ◽  
Valentina E. Smirnova ◽  
Tatiana B. Tennikova
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Poly Lactic Acid ◽  
One Pot ◽  
One Pot Synthesis

Er/β-zeolite-catalyzed one-pot conversion of cellulose to lactic acid

2016 ◽  
Vol 24 (3) ◽  
pp. 697-706 ◽  
Author(s):  
Fen-Fen Wang ◽  
Hai-Zhen Wu ◽  
Hui-Fang Ren ◽  
Chun-Ling Liu ◽  
Chun-Li Xu ◽  
...  
Keyword(s):  
Lactic Acid ◽  
One Pot ◽  
Β Zeolite
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