Selective Hydrogenolysis of Xylitol to Ethylene Glycol and Propylene Glycol over Silica Dispersed Copper Catalysts Prepared by a Precipitation-Gel Method

ChemCatChem ◽  
2014 ◽  
Vol 6 (10) ◽  
pp. 2918-2928 ◽  
Author(s):  
Hailong Liu ◽  
Zhiwei Huang ◽  
Chungu Xia ◽  
Yuqing Jia ◽  
Jing Chen ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Propylene Glycol ◽  
Copper Catalysts ◽  
Gel Method ◽  
Selective Hydrogenolysis

Selective hydrogenolysis of xylitol to ethylene glycol and propylene glycol over copper catalysts

2014 ◽  
Vol 147 ◽  
pp. 377-386 ◽  
Author(s):  
Zhiwei Huang ◽  
Jing Chen ◽  
Yuqing Jia ◽  
Hailong Liu ◽  
Chungu Xia ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Propylene Glycol ◽  
Copper Catalysts ◽  
Selective Hydrogenolysis

Efficient bimetallic NiCu-SiO2 catalysts for selective hydrogenolysis of xylitol to ethylene glycol and propylene glycol

2018 ◽  
Vol 220 ◽  
pp. 251-263 ◽  
Author(s):  
Hailong Liu ◽  
Zhiwei Huang ◽  
Haixiao Kang ◽  
Xuemei Li ◽  
Chungu Xia ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Propylene Glycol ◽  
Selective Hydrogenolysis

Mechanistic insight into the selective hydrogenolysis of sorbitol to propylene glycol and ethylene glycol on supported Ru catalysts

2016 ◽  
Vol 6 (19) ◽  
pp. 7042-7052 ◽  
Author(s):  
Yuqing Jia ◽  
Haichao Liu
Keyword(s):  
Ethylene Glycol ◽  
Propylene Glycol ◽  
Ru Catalysts ◽  
Rate Determining Step ◽  
Mechanistic Insight ◽  
Reaction Proceeds ◽  
Selective Hydrogenolysis ◽  
Insight Into ◽  
Preferential Activation

Ru/C efficiently catalyzes the selective hydrogenolysis of sorbitol to ethylene glycol and propylene glycol in the presence of Ca(OH)2. This reaction proceeds by primary dehydrogenation of sorbitol to hexose intermediates as the rate-determining step, most likely via preferential activation of its C(5)–H bond on the Ru surfaces.

Hydrogenolysis of glucose and fructose in glycol solutions over CuO-MgO-ZrO2 catalyst

2020 ◽  
pp. 48-55
Author(s):  
M.E. Sharanda ◽  
◽  
E.A. Bondarenko ◽  
Keyword(s):  
Ethylene Glycol ◽  
Propylene Glycol ◽  
Flow Reactor ◽  
General Trend ◽  
Raw Materials ◽  
Reaction Products ◽  
Renewable Raw Materials ◽  
High Partial Pressure ◽  
Zro2 Catalyst ◽  
Phase Process

Ethylene glycol and propylene glycol are important representatives of polyols. On an industrial scale, they are obtained from petrochemical raw materials. Within a decade, significant efforts were made for the producing of polyols from biologically renewable raw materials - carbohydrates. The general trend for carbohydrate hydrogenolysis includes application of liquid-phase process with the use of modified metal-oxide catalysts, at 120-120 ° C and pressure of 3MPa or above. So high pressure is used for the reason to increase hydrogen solubility, and also due to the high partial pressure of low boiling solvents. We supposed that usage of high boiling solvents could allow hydrogenolysis to be performed at the lower pressure. Ethylene glycol and propylene glycol are of particular interest as such kind of solvent since they are both the main products of glucose hydrogenolysis. In this work, the process of hydrogenolysis of glucose and fructose over Cu / MgO-ZrO2 catalyst have been studied at temperature range of 160-200 °C and a pressure of 0.1-0.3 MPa in a flow reactor. The solvents were simultaneously the target products of the reaction - ethylene glycol and / or propylene glycol. Gas chromatography and 13C NMR were used for the reaction products identification. It was found that the solubility of glucose in propylene glycol is 21 % by weight, and in ethylene glycol 62% by weight. It was pointed out that the process of hydrogenolysis can take place at a pressure close to atmospheric. Under these conditions, the conversion of hexoses reaches 96-100 %. The reaction products are preferably propylene glycol and ethylene glycol. The total selectivity for C3-2 polyols is 90-94 %, that is higher than in the hydrogenolysis of glucose in aqueous solution.

Determination of Small Amounts of 1,2-Propylene Glycol in Ethylene Glycol

1952 ◽  
Vol 24 (6) ◽  
pp. 1053-1055 ◽  
Author(s):  
W. A. Cannon ◽  
L. C. Jackson
Keyword(s):  
Ethylene Glycol ◽  
Propylene Glycol

Betaine + (Glycerol or Ethylene Glycol or Propylene Glycol) Deep Eutectic Solvents for Extractive Purification of Gasoline

2018 ◽  
Vol 3 (44) ◽  
pp. 12582-12590 ◽  
Author(s):  
Kristina Zagajski Kučan ◽  
Marijana Perković ◽  
Karlo Cmrk ◽  
Dominik Načinović ◽  
Marko Rogošić
Keyword(s):  
Ethylene Glycol ◽  
Propylene Glycol ◽  
Deep Eutectic Solvents
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