Entity

Time filter

Source Type


Gassama A.,CNRS Institute of Molecular Chemistry - Reims | Ernenwein C.,Agro Industrie Recherches et Developpements ARD | Hoffmann N.,CNRS Institute of Molecular Chemistry - Reims
Green Chemistry | Year: 2010

Furfural was oxidized to 2[5H]-furanone 2 using hydrogen peroxide. Furanone 2 was transformed with two equivalents of fatty amines. A condensation and a Michael reaction occurred. Ethyl bromoacetate 5 or methyl acrylate 6 were then added to the secondary amine function. Saponification of the ester function leads to amphoteric surfactants 8a,b,c and 10a,b,c possessing two n-alkyl chains as hydrophobic part. The resulting products can also be considered as Gemini surfactants or twin-tail amphoteric surfactants. Biodegradation studies have been performed on these compounds and the surfactant properties of 8a have been determined in detail. © 2010 The Royal Society of Chemistry.


Patent
French National Institute for Agricultural Research and Agro Industrie Recherches Et Developpements Ard | Date: 2014-02-27

A polypeptide which is a mutated mannanase, whose sequence is derived from a native mannanase of the filamentous ascomycete coprophile fungus


Freville V.,CNRS Integrated Transformations of Renewable Matter | van Hecke E.,CNRS Integrated Transformations of Renewable Matter | Marinkovic S.,Agro Industrie Recherches et Developpements ARD | Ernenwein C.,Agro Industrie Recherches et Developpements ARD | Pezron I.,CNRS Integrated Transformations of Renewable Matter
Journal of Dispersion Science and Technology | Year: 2011

Current regulations require the substitution of toxic solvents by safer ones. Succinct acid diesters, which are among promising bio-based candidates, have been compared to petrochemical solvents through two complementary approaches. The first one deals with a prediction of solvents dissolution power based on Hansen Solubility Parameters (HSP). HSP values obtained with the model developed by Stefanis-Panayiotou showed good agreement with experimental miscibility maps. The second one explores the physicochemical properties with multivariate statistical methods. Principal Components Analysis and Agglomerative Hierarchical Clustering led to a partition of green solvents into clusters together with toxic solvents, suggesting favorable substitutions in further applications. © Taylor & Francis Group, LLC.


Gassama A.,CNRS Institute of Molecular Chemistry - Reims | Ernenwein C.,Agro Industrie Recherches et Developpements ARD | Youssef A.,CNRS Institute of Molecular Chemistry - Reims | Agach M.,Agro Industrie Recherches et Developpements ARD | And 4 more authors.
Green Chemistry | Year: 2013

Furfural obtained from pentose containing biomass such as hemicelluloses is subjected to photooxygenation. The resulting hydroxyfuranone obtained in high yields undergoes acetalization with fatty alcohols. Using NaHSO3, surfactants are obtained by addition of a sulfonate group to α,β-unsaturated carboxyl or carbonyl compounds. Addition occurred either at the CC double bond (6) or at the aldehyde function (7). Compared to conventional surfactants of this type, the resulting compounds possess similar good detergent properties. In the case of compound family 6 and when compared to the corresponding alkylsulfate and alkylsulfonate surfactants, even lower critical micelle concentrations (CMC) are observed. Biodegradation of the new surfactants was determined according to the OECD Test guideline 301 F. Compounds of family 6 are biodegradable. Biodegradation of compounds of family 7 stopped after 10 days. © 2013 The Royal Society of Chemistry.

Discover hidden collaborations