Transformation of cellulosic saccharides into alkyl glucosides catalyzed by bifunctional ionic liquids

2018 ◽  
Vol 54 (84) ◽  
pp. 11969-11972
Author(s):  
Han-cheng Zhou ◽  
Bin Wang ◽  
Xin-feng Guo ◽  
Xin-yi Zhang ◽  
Xiao-hong Wei ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Catalytic Conversion ◽  
Degree Of Crystallinity ◽  
Low Degree ◽  
Alkyl Glucosides

Three kinds of hydrophobic/acidic bifunctional ionic liquids were synthesized and utilized as catalysts for the conversion of cellulosic saccharides into alkyl glucosides, which exhibit a high catalytic conversion for cellobiose and cellulose with a low degree of crystallinity; the catalyst can be easily recovered and reused.

Sustainable Approach to Catalytic Conversion of Starch-based Biomaterials into Hydroxymethylfurfural Using Ionic Liquids

2014 ◽  
Vol 18 (9) ◽  
pp. 1149-1158 ◽  
Author(s):  
Young-Byung Yi ◽  
Jin-Woo Lee ◽  
Chung-Han Chung
Keyword(s):  
Ionic Liquids ◽  
Catalytic Conversion

Synthesis of Amorphous Zirconium Dioxide from Zirconyl Nitrate in Presence of Oxalic Acid

2021 ◽  
Vol 316 ◽  
pp. 127-133
Author(s):  
Yuriy Velyaev ◽  
Ilona Kometiani ◽  
Olga Miroshnichenko
Keyword(s):  
Oxalic Acid ◽  
Zirconium Dioxide ◽  
Spherical Particles ◽  
Degree Of Crystallinity ◽  
Optimum Temperature ◽  
Sorbed Water ◽  
Zirconyl Nitrate ◽  
X Ray ◽  
Low Degree ◽  
Gel Drying

The article presents the results of studies on preparation of amorphous zirconium dioxide from zirconium nitrate by its hydrolysis in the presence of oxalic acid. It is determined that the balance of reagents taken for synthesis (1 ml 0,025 M ZrO(NO3)2 is 1.35 ml 4 M HOOC-COOH), and the optimum temperature of the received gel drying, which is 230 ̊С, is established, too. Morphology of the obtained ZrO2 samples was explored. It has been found that the calcining temperature is independent of the size and shape forming irregular agglomerates, consisting of smaller spherical particles, whose diameter varies between 50 and 300 nm. The X-ray analysis of the sample is represented, which showed a low degree of crystallinity of the substance. IR spectroscopy data showed the presence of zirconium dioxide-characteristic peaks on the IR spectrum. The same spectrum reflects the presence of a large amount of sorbed water in the obtained sample, as well as peaks characteristic of the gas adsorbed by the sample from the environment.

Catalytic conversion of carbohydrates into 5-hydroxymethylfurfural by Hafnium(IV) chloride in ionic liquids

2012 ◽  
Vol 64 (10) ◽  
pp. 770-775 ◽  
Author(s):  
Zehui Zhang ◽  
Bing Liu ◽  
Zongbao K. Zhao
Keyword(s):  
Ionic Liquids ◽  
Catalytic Conversion

Preparation of nanocellulose by hydrolysis with ionic liquids and two-step hydrolysis with ionic liquids and enzymes

2021 ◽  
Vol 116 ◽  
pp. 5-14
Author(s):  
Marta Babicka ◽  
Magdalena Woźniak ◽  
Kinga Szentner ◽  
Sławomir Borysiak ◽  
Krzysztof Dwiecki ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Degree Of Crystallinity ◽  
Cellulolytic Enzyme ◽  
X Ray Diffraction ◽  
Production Methods ◽  
Step Process ◽  
X Ray ◽  
One Step ◽  
Xrd Patterns ◽  
The One

The aim of this study was to compare parameters of nanocellulose obtained by two different procedures: hydrolysis with ionic liquids (1-allyl-3-methylimidazolium chloride and 1-ethyl-3-methylimidazolium acetate) and hydrolysis with ionic liquids in combination with hydrolysis using a cellulolytic enzyme from Trichoderma reesei. Avicel cellulose was treated with two ionic liquids: 1-allyl-3-methylimidazolium chloride (AmimCl) and 1-ethyl 3-methylimidazolium acetate (EmimOAc). In the two-step hydrolysis cellulose after treatment with ionic liquids was additionally hydrolyzed with a solution of enzymes. In order to characterize the obtained material, the following analyses were used: infrared spectroscopy, X-ray diffraction and dynamic light scattering. The results indicated that cellulose obtained by two-step nanocellulose production methods (first hydrolysis with ionic liquids and then with enzymes) showed similar parameters (particle size, XRD patterns and degree of crystallinity) as the material after the one-step process, i.e. hydrolysis with ionic liquids.

Imidazolium-based polymeric ionic liquids for heterogeneous catalytic conversion of CO2 into cyclic carbonates

2020 ◽  
Vol 292 ◽  
pp. 109751 ◽  
Author(s):  
Yinpeng Wang ◽  
Junqi Nie ◽  
Cuifen Lu ◽  
Feiyi Wang ◽  
Chao Ma ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Catalytic Conversion ◽  
Cyclic Carbonates ◽  
Polymeric Ionic Liquids ◽  
Heterogeneous Catalytic

scholarly journals Heterogeneous catalytic conversion of CO2 and epoxides to cyclic carbonates over multifunctional tri-s-triazine terminal-linked ionic liquids

2017 ◽  
Vol 347 ◽  
pp. 138-147 ◽  
Author(s):  
Mengshuai Liu ◽  
Jianwen Lan ◽  
Lin Liang ◽  
Jianmin Sun ◽  
Masahiko Arai
Keyword(s):  
Ionic Liquids ◽  
Catalytic Conversion ◽  
Cyclic Carbonates ◽  
Heterogeneous Catalytic

Boron-doped melamine-derived carbon nitrides tailored by ionic liquids for catalytic conversion of CO2 into cyclic carbonates

2017 ◽  
Vol 19 (13) ◽  
pp. 2957-2965 ◽  
Author(s):  
Qian Su ◽  
Xiaoqian Yao ◽  
Weiguo Cheng ◽  
Suojiang Zhang
Keyword(s):  
Ionic Liquids ◽  
Catalytic Conversion ◽  
Soft Template ◽  
Cyclic Carbonates ◽  
Boron Doped ◽  
Carbon Nitrides ◽  
Boron Source

Boron-doped melamine-derived carbon nitrides were tailored with BmimBF4 as a soft template and boron source for CO2 conversion into cyclic carbonates.

Catalytic Conversion of Carbohydrate Biomass in Ionic Liquids to 5-Hydroxymethyl Furfural and Levulinic Acid: A Review

2020 ◽  
Vol 13 (3) ◽  
pp. 693-736 ◽  
Author(s):  
Nur Aainaa Syahirah Ramli ◽  
Nor Aishah Saidina Amin
Keyword(s):  
Ionic Liquids ◽  
Levulinic Acid ◽  
Catalytic Conversion ◽  
Hydroxymethyl Furfural
Sign in / Sign up

Export Citation Format

Share Document