Results 231 to 240 of about 38,855 (280)

TOWARDS CATALYTIC OXIDATIVE DEPOLYMERIZATION OF LIGNIN

, 2016
Lignin is one of the most abundant and underutilized biopolymers on earth. Primarily composed on three monolignol units (sinapyl, coniferyl, and p-coumaryl alcohol), lignin is formed through a radical pathway resulting in an assortment of linkages, of which the β-O-4 linkage is the most prevalent (up to 60% in some hardwood species).
Mobley, Justin K.
openaire   +3 more sources

Supported-Metal Catalysts in Upgrading Lignin to Aromatics by Oxidative Depolymerization

Catalysts, 2021
Supported gold and platinum particles on titanium oxide catalysts were evaluated in the oxidative depolymerization of lignins toward high added value aromatics under mild conditions (T: 150 °C, Pair: 20 bar, CNaOH: 10 g/L, 1 h).
Aleksandr S Kazachenko, Pascal Fongarland, Denilson Da Silva Perez   +2 more
exaly   +2 more sources

Some of the next articles are maybe not open access.

Related searches:

Depolymerization of lignin by wet air oxidation

Bioresource Technology Reports, 2020
Abstract In the present study, effect of temperature (150–250 °C) and pressure (500–1500 psi) was investigated for depolymerization of lignin by wet air oxidation (WAO). Commercial alkali lignin was used as representative lignin material. The degradation/oxidation products of WAO treatments were identified to understand the potential value of the ...
Sibel Irmak, Juhyon Kang, Mark Wilkins
openaire   +1 more source

The depolymerization of sodium alginate by oxidative degradation

Pharmaceutical Development and Technology, 2011
Alginate has been extensively used as a carrier for macromolecules and as gene delivery vehicle. Both properties are molecular weight (Mw) dependent. Herein, we investigated factors affecting the oxidative depolymerization of alginate. The depolymerization process occurred mainly in the first 1 h.
Shirui, Mao, Tingting, Zhang, Wei, Sun, Xuhong, Ren   +3 more
openaire   +2 more sources

Oxidative Depolymerization of Lignin in Ionic Liquids

ChemSusChem, 2010
AbstractBeech lignin was oxidatively cleaved in ionic liquids to give phenols, unsaturated propylaromatics, and aromatic aldehydes. A multiparallel batch reactor system was used to screen different ionic liquids and metal catalysts. Mn(NO3)2 in 1‐ethyl‐3‐methylimidazolium trifluoromethanesulfonate [EMIM][CF3SO3] proved to be the most effective reaction
Kerstin, Stärk, Nicola, Taccardi, Andreas, Bösmann, Peter, Wasserscheid   +3 more
openaire   +2 more sources

Depolymerization of oxidized bituminous coals

Fuel, 1974
Abstract Certain high-sulphur-containing, high-volatile bituminous (hvb) coals have been converted into products which are almost completely soluble in chloroform. These products were obtained by a series of reactions involving initial oxidation with 2N nitric acid, depolymerization with boron trifluoride-phenol, and acetylation.
Larry J. Darlage, J.P. Weidner, S.S. Block   +2 more
openaire   +1 more source

Anil formation by oxidative depolymerization

Journal of the Chemical Society, Chemical Communications, 1973
Mixtures of substituted anilines and oligomers of poly-(2,6-dimethyl-1,4-phenylene) ether in benzene were oxidized by sodium bismuthate to give anils such as 2,6-dimethyl-p-benzoquinone-4-(2′,4′,6′-trimethyl)anil, a product of oxidative depolymerization.
Emil Kon, Edward McNelis
openaire   +1 more source

Periodate oxidized alginates: Depolymerization kinetics

Carbohydrate Polymers, 2011
Abstract Limited periodate oxidation (0–8%) of alginates results in enhanced degradability, extending the range of applications of alginates as biomaterials, e.g. in tissue engineering. Oxidation produces dialdehydes that are highly sensitive to alkaline β-elimination, even under physiological conditions (pH 7.4, 37 °C).
Kåre A. Kristiansen, Henrik Berg Tomren, Bjørn E. Christensen   +2 more
openaire   +1 more source

Depolymerization of cellulose to glucose by oxidation–hydrolysis

Green Chemistry, 2015
An oxidation–hydrolysis strategy was developed for depolymerization of cellulose. The method needs no additional catalyst. Part of the hydroxymethyl groups on glucose units were oxidized to carboxyl groups during the preoxidation treatment, and the generated acid sites act as the catalytic active centers for the following depolymerization of cellulose.
Lipeng Zhou, Xiaomei Yang, Jiaolong Xu, Meiting Shi, Feng Wang, Chen Chen, Jie Xu   +6 more
openaire   +1 more source

Sulphite and oxidative—reductive depolymerization reactions

Food Chemistry, 1997
Abstract Addition of sulphite at levels between 0.004 and 1% helps to protect the water soluble neutral polysaccharide guar gum from thermal degradation. The greater the amount of sulphite incorporated the more viscous the guar is post-retorting. Starch granules, from a wide range of sources, swell when heated in excess water.
Lorna A. Paterson, Sandra E. Hill, John R. Mitchell, John M.V. Blanshard   +3 more
openaire   +1 more source