Synergism of Microwaves and Immobilized Enzyme Catalysis in Synthesis of Adipic Acid Esters in Nonaqueous Media

2005 ◽  
Vol 35 (12) ◽  
pp. 1699-1705 ◽  
Author(s):  
Ganapati D. Yadav ◽  
Piyush S. Lathi
Keyword(s):  
Adipic Acid ◽  
Enzyme Catalysis ◽  
Immobilized Enzyme ◽  
Nonaqueous Media ◽  
Acid Esters

scholarly journals Designing of Green Plasticizers and Assessment of the Effectiveness of Their Use

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1761
Author(s):  
Aliya K. Mazitova ◽  
Guliya K. Aminova ◽  
Irina N. Vikhareva
Keyword(s):  
Adipic Acid ◽  
Polymer Materials ◽  
Operational Parameters ◽  
Solid Domestic Waste ◽  
Polymer Waste ◽  
Synthetic Materials ◽  
Environmental Requirements ◽  
Potential Methods ◽  
High Set ◽  
Acid Esters

The growing anthropogenic load on the lithosphere is currently characterized by the alienation of huge areas for solid domestic waste. One of the most common pollutants is traditional plastics with a degradation period of over 100 years. In connection with the increasing environmental requirements, polymer materials, along with a high set of technological and operational parameters, must be environmentally friendly and biodegradable. The development of polymer composite materials that undergo accelerated physicochemical and biological changes in the natural environment due to the introduction of biodegradable additives is one of the potential methods for processing synthetic materials and ensures the release of significant areas of fertile soils and lands from the steadily increasing amount of polymer waste. The use of adipic acid esters as PVC plasticizers contributes to the production of biodegradable composites. The article describes a method for obtaining new esters of adipic acid, presents the results of studying their properties for practical use in PVC composites, and assesses the economic efficiency of preventing damage to the environment when using them.

Direct synthesis of adipic acid esters via palladium-catalyzed carbonylation of 1,3-dienes

Science ◽  
2019 ◽  
Vol 366 (6472) ◽  
pp. 1514-1517 ◽  
Author(s):  
Ji Yang ◽  
Jiawang Liu ◽  
Helfried Neumann ◽  
Robert Franke ◽  
Ralf Jackstell ◽  
...  
Keyword(s):  
Adipic Acid ◽  
Direct Synthesis ◽  
Reaction Network ◽  
Catalyst System ◽  
Environmentally Benign ◽  
Palladium Catalyzed ◽  
Bidentate Phosphine ◽  
Cost Efficient ◽  
Bidentate Phosphine Ligand ◽  
Acid Esters

The direct carbonylation of 1,3-butadiene offers the potential for a more cost-efficient and environmentally benign route to industrially important adipic acid derivatives. However, owing to the complex reaction network of regioisomeric carbonylation and isomerization pathways, a selective practical catalyst for this process has thus far proven elusive. Here, we report the design of a pyridyl-substituted bidentate phosphine ligand (HeMaRaphos) that, upon coordination to palladium, catalyzes adipate diester formation from 1,3-butadiene, carbon monoxide, and butanol with 97% selectivity and 100% atom-economy under industrially viable and scalable conditions (turnover number > 60,000). This catalyst system also affords access to a variety of other di- and triesters from 1,2- and 1,3-dienes.

scholarly journals Immobilization of Prunus amygdalus Hydroxynitrile Lyase on Celite

Catalysts ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 287 ◽  
Author(s):  
Paula Bracco ◽  
Guzman Torrelo ◽  
Sander Noordam ◽  
Glenn de Jong ◽  
Ulf Hanefeld
Keyword(s):  
Enzyme Catalysis ◽  
Immobilized Enzyme ◽  
Immobilized Enzymes ◽  
Prunus Amygdalus ◽  
Hydroxynitrile Lyase ◽  
High Enzyme ◽  
Background Reaction

The hydroxynitrile lyase from Prunus amygdalus was immobilized on Celite R-633. The immobilized enzyme could successfully be utilized in buffer saturated MTBE and excellent conversions of benzaldehyde to R-mandelonitrile were observed. No leaching occurred. To achieve high enantioselectivities, the suppression of the undesired background reaction was essential. This could be achieved by high enzyme loadings and the tight packing of the immobilized enzymes. When the immobilized enzyme is loosely packed, both the enzyme catalysis and the background reaction accelerates and only a modest enantioselectivity is observed. The enzyme was recycled for up to ten times, with some loss of activity and also enantioselectivity after 5 cycles, independent of packing.

scholarly journals Activated sludge degradation of adipic acid esters.

1976 ◽  
Vol 31 (5) ◽  
pp. 746-749 ◽  
Author(s):  
V W Saeger ◽  
R G Kalley ◽  
O Hicks ◽  
E S Tucker ◽  
J P Mieure
Keyword(s):  
Activated Sludge ◽  
Adipic Acid ◽  
Acid Esters

Orderly cascade of immobilized-enzyme catalysis and photocatalysis for continuous-microflow production of 2-phenylbenzothiazole

2021 ◽  
Author(s):  
Qiang Chen ◽  
Yujun Wang ◽  
Guangsheng Luo
Keyword(s):  
Enzyme Catalysis ◽  
Immobilized Enzyme ◽  
First Time

Green, economic, efficient, and sustainable synthesis of 2-phenylbenzothiazole (2-PBZ)—an important versatile scaffold—remains challenging. Here, for the first time, we propose to cascade immobilized enzyme catalysis and photocatalysis in a continuous-microflow...

scholarly journals Protonation Equilibria of Biologically Active Ligands in Mixed Aqueous Organic Solvents

2014 ◽  
Vol 2014 ◽  
pp. 1-18
Author(s):  
Ahmed A. El-Sherif ◽  
Mohamed M. Shoukry ◽  
Abeer T. Abd Elkarim ◽  
Mohammad H. Barakat
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Organic Solvents ◽  
Biologically Active ◽  
Amino Acid Esters ◽  
Nonaqueous Media ◽  
Protonation Equilibria ◽  
Dna Constituents ◽  
Equilibrium Concentrations ◽  
Acid Esters

The review is mainly concerned with the protonation equilibria of biologically active ligands like amino acids, peptides, DNA constituents, and amino acid esters in nonaqueous media. Equilibrium concentrations of proton-ligand formation as a function of pH were investigated. Also, thermodynamics associated with protonation equilibria were also discussed.

scholarly journals H 2 ‐Free Re‐Based Catalytic Dehydroxylation of Aldaric Acid to Muconic and Adipic Acid Esters

2020 ◽  
Author(s):  
Brigita Hočevar ◽  
Anže Prašnikar ◽  
Matej Huš ◽  
Miha Grilc ◽  
Blaž Likozar
Keyword(s):  
Adipic Acid ◽  
Acid Esters
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