Production of furfural from xylose catalyzed by a novel calcium gluconate derived carbon solid acid in 1,4-dioxane

2020 ◽  
Vol 44 (19) ◽  
pp. 7968-7975 ◽  
Author(s):  
Tao Yang ◽  
Wenzhi Li ◽  
Mingxue Su ◽  
Yang Liu ◽  
Minghou Liu
Keyword(s):  
High Temperature ◽  
Calcium Gluconate ◽  
Room Temperature ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Carbon Based

A novel carbon-based solid acid catalyst (SC-GCa-800) was prepared by the high-temperature carbonization of calcium gluconate followed by sulfonation with 4-diazoniobenzenesulfonate at room temperature.

Novel Carbon-based Solid Acid from Green Pistachio Peel as an Efficient Catalyst for the Chemoselective Acylation, Acetalization and Thioacetalization of Aldehydes, Synthesis of Biscoumarins and Antimicrobial Evaluation

2019 ◽  
Vol 7 (1) ◽  
pp. 55-80 ◽  
Author(s):  
Fatemeh Ghorbani ◽  
Seied Ali Pourmousavi ◽  
Hamzeh Kiyani
Keyword(s):  
Catalytic Activity ◽  
High Efficiency ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Hydrothermal Carbonization ◽  
Biomass Waste ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
Carbon Based

Background: Much attention has been focused on heterogeneous catalysts. Reactions with these recoverable and reusable catalysts are clean, selective with high efficiency. Among the heterogeneous solid acid catalyst in organic synthesis, Carbon-Based Solid Acids (CBSAs), which are important solid acid with many practical and research applications have been extensively studied. In this work, green Pistachio peel, a biomass waste, was converted into a novel carbon-based solid acid catalyst (Pis-SO3H). Objective: The aim of this work is to synthesize highly sulfonated carbon as an efficient, recyclable, nontoxic solid acid catalyst by simultaneous sulfonation, dehydration and carbonization of green Pistachio peel as biomass and investigate the catalytic activity of Pis-SO3H in acetalization, thioacetalization, acylation of aldehydes and synthesis of 3,3'-Arylmethylene-bis(4-hydroxycoumarin) derivatives. Method: Pis-SO3H was synthesized by an integrated fast one-step hydrothermal carbonization and sulfonation process in the presence of sulfuric acid. The characterization of the physicochemical properties of Pis-SO3H was achieved by XRD, FT-IR, FE-SEM, and elemental analysis. Results: The result of acid-base titration showed that the total acidity of the catalyst was 7.75 mmol H+g−1. This new heterogeneous catalyst has been efficiently used for the chemoselective thioacetalization, acetalization and acylation of aldehyde and the synthesis of biscoumarins under solvent-free conditions. All the reactions work easily in high yields. The antimicrobial activity of some of the biscoumarins was evaluated in screening by disk diffusion assay for the zone of inhibition. Conclusion: The catalytic activity of the Pis-SO3H was investigated during acetalization, thioacetalization, acylation and synthesis of biscoumarins. The results of protection of carbonyl groups and synthesis of biscoumarins in the present work offer effective alternatives for environmentally friendly utilization of abundant biomass waste.

scholarly journals Sulfonic-acid-functionalized carbon fiber from waste newspaper as a recyclable carbon based solid acid catalyst for the hydrolysis of cellulose

RSC Advances ◽  
2019 ◽  
Vol 9 (50) ◽  
pp. 28902-28907 ◽  
Author(s):  
Runming Gong ◽  
Zihao Ma ◽  
Xing Wang ◽  
Ying Han ◽  
Yanzhu Guo ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Sulfonic Acid ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Cellulosic Materials ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of ◽  
Carbon Based

Waste newspaper is one of the most common cellulosic materials.

Highly selective direct azidation of alcohols over a heterogeneous povidone–phosphotungstic solid acid catalyst

2016 ◽  
Vol 40 (12) ◽  
pp. 10240-10245 ◽  
Author(s):  
Sumit Kamble ◽  
Sagar More ◽  
Chandrashekhar Rode
Keyword(s):  
Room Temperature ◽  
Solid Acid ◽  
Phosphotungstic Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Product Yields ◽  
Acid Catalyzed

A heterogeneous povidone–phosphotungstic acid catalyzed direct selective azidation of alcohols gave excellent product yields at room temperature.

Glycerol Valorization as Biofuel Additives by Employing a Carbon-Based Solid Acid Catalyst Derived from Glycerol

2014 ◽  
Vol 53 (42) ◽  
pp. 16164-16169 ◽  
Author(s):  
Ummadisetti Chandrakala ◽  
Rachapudi B. N. Prasad ◽  
Bethala L. A. Prabhavathi Devi
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Carbon Based

Acetalization of carbonyl compounds with 2,2,4-trimethyl-1,3-pentanedio catalyzed by novel carbon based solid acid catalyst

2008 ◽  
Vol 17 (2) ◽  
pp. 149-152 ◽  
Author(s):  
Ling Liu ◽  
Yuechang Zhao ◽  
Shan Gan ◽  
Xuezheng Liang ◽  
Jianguo Yang ◽  
...  
Keyword(s):  
Carbonyl Compounds ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Carbon Based

Synthesis of biodiesel from cottonseed oil and methanol using a carbon-based solid acid catalyst

2009 ◽  
Vol 90 (7-8) ◽  
pp. 1002-1008 ◽  
Author(s):  
Qing Shu ◽  
Qiang Zhang ◽  
Guanghui Xu ◽  
Zeeshan Nawaz ◽  
Dezheng Wang ◽  
...  
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Cottonseed Oil ◽  
Carbon Based

Synthesis and Application of an Efficient and Stable Solid Acid Catalyst St-c-AS

2011 ◽  
Vol 306-307 ◽  
pp. 1508-1511
Author(s):  
Sheng Huan Liu ◽  
Ping Rui Meng ◽  
Li Juan Yu ◽  
Yan Mei Zhang ◽  
Xiao Hui Wang
Keyword(s):  
High Temperature ◽  
High Speed ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Superior Performance ◽  
High Catalytic Activity ◽  
High Concentration ◽  
Acrylic Acid Copolymer ◽  
Soap Free Emulsion Polymerization

Styrene/Sodium allyl sulfonate copolymer (St-c-SAS) were prepared using soap-free emulsion polymerization method and boiling at high-speed stirring, and it was acided to obtain an efficient, stable, reusable new solid acid catalyst styrene/acrylic acid copolymer (St-c-AS). Elemental analysis and acid–base titration techniques showed that St-c-AS have high concentration of sulfonic groups. Differential thermal analysis (DTA) and thermogravimetric analysis (TG) results showed that the sulfonic of copolymer was hard to fall off at high temperature. Esterifications of acetic acid with ethanol showed that St-c-AS has high catalytic activity, and the catalyst can be reused without separation of 10 times, the esterification yields close to or exceed 100%. The superior performance of St-c-AS is attributed to their unique features including large surface area, high content of sulfonic groups as well as high temperature resistance.

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