Highly Selective Synthesis of Acrylic Acid from Lactide in the Liquid Phase

ChemSusChem ◽  
2018 ◽  
Vol 11 (17) ◽  
pp. 2936-2943 ◽  
Author(s):  
Jens Nagengast ◽  
Simon Hahn ◽  
Nicola Taccardi ◽  
Matthias Kehrer ◽  
Julian Kadar ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Acrylic Acid ◽  
Selective Synthesis

scholarly journals ZnAlMCM-41; a very ecofriendly and reusable solid acid catalyst for highly selective synthesis of 1, 3-dioxanes by Prins cyclization of olefins

2021 ◽  
Author(s):  
Manickam Selvaraj ◽  
Mohammed A. Assiri ◽  
Hari Singh ◽  
Jimmy Nelson Appaturi ◽  
Subrahmanyam Ch ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Selective Synthesis ◽  
Comparison Study ◽  
Catalytic Method ◽  
Prins Cyclization ◽  
Heterogeneous Catalytic

Prins cyclization of styrene (SE) with paraformaldehyde (PFCHO) was conducted with mesoporous ZnAlMCM-41 catalysts for synthesis of 4-phenyl-1,3-dioxane (4-PDO) under a liquid phase heterogeneous catalytic method. For comparison study, the...

A Selective Synthesis of Unsymmetrical 1,1'-Methylenebisdiazoles by Solid-liquid Phase Transfer Catalysis

Heterocycles ◽  
1986 ◽  
Vol 24 (8) ◽  
pp. 2233 ◽  
Author(s):  
Jos� Elguero ◽  
Sebastian Juli� ◽  
Carlos Mart地ez-Martorell
Keyword(s):  
Liquid Phase ◽  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Selective Synthesis ◽  
Solid Liquid

Factors affecting liquid-phase photografting of acrylic acid on cellulose and its derivatives

1997 ◽  
Vol 33 (1) ◽  
pp. 67-71 ◽  
Author(s):  
Hitoshi Kubota ◽  
Yukari Fukushima ◽  
Shin Kuwabara
Keyword(s):  
Liquid Phase ◽  
Acrylic Acid ◽  
Factors Affecting

Catalytic Wet Oxidation of Acrylic Acid: Studies with Manganese-based Oxides

2003 ◽  
Vol 1 (1) ◽  
Author(s):  
Adrián M.T. Silva ◽  
Rita R.N. Marques ◽  
Rosa M. Quinta-Ferreira
Keyword(s):  
Liquid Phase ◽  
Acrylic Acid ◽  
Industrial Effluents ◽  
Operating Conditions ◽  
Catalyst Stability ◽  
Acid Oxidation ◽  
Incipient Wetness Impregnation ◽  
Impregnation Method ◽  
Catalytic Wet Oxidation ◽  
Catalytic Systems

Development of active, stable and economical catalysts for oxidation of acrylic acid contained in industrial effluents is nowadays of great importance. Several manganese-based solids catalysts supported in Ce, Zr, Ti and Al oxides were prepared in our laboratory by incipient wetness impregnation for oxidation of acrylic acid in a batch high-pressure reactor at slurry conditions under 200°C and 15 bar of oxygen partial pressure. The Mn-Ce-O catalyst was the most active leading to high conversions (92.3%) in terms of total organic carbon (TOC) and total degradation of acrylic acid in the first 30 min of reaction. The TOC reductions were lower with Mn-Zr-O (45.6%), Mn-Ti-O (43.6%) and Mn-Al-O (28.2%) as well as acrylic acid was not completely degraded even after 180 min of reaction. The impregnation method used for catalyst preparation was compared with the co-precipitation procedure, being the last one less effective for TOC reduction (87.0%) although the same activity to oxidation of acrylic acid was observed. Acetic and formic acids were found as reaction intermediates being refractory compounds for the catalysts supported in Zr, Ti and Al. Catalyst stability was also evaluated and Mn-Ce-O prepared by impregnation showed low leaching of Mn to the liquid phase as well as carbon adsorption was not found strengthening the catalyst potentialities in the treatment of wastewaters containing acrylic acid. Since under non-catalytic conditions acrylic acid is refractory up to high temperatures (260°C), this work offers a step forward in the design of an economical catalyst able to promote acrylic acid oxidation in the liquid-phase at lower operating conditions than those used in non-catalytic systems.

Acrylic Acid Synthesis from Lactide in a Continuous Liquid-Phase Process

2019 ◽  
Vol 7 (7) ◽  
pp. 7140-7147 ◽  
Author(s):  
Julian Kadar ◽  
Nina Heene-Würl ◽  
Simon Hahn ◽  
Jens Nagengast ◽  
Matthias Kehrer ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Acrylic Acid ◽  
Acid Synthesis ◽  
Phase Process
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