scholarly journals Chemical Adsorption Strategy for DMC-MeOH Mixture Separation

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1735
Author(s):  
Fucan Zhang ◽  
Ping Liu ◽  
Kan Zhang ◽  
Qing-Wen Song
Keyword(s):  
Dimethyl Carbonate ◽  
Co2 Adsorption ◽  
Scale Up ◽  
Ambient Condition ◽  
Adsorption Efficiency ◽  
Monohydric Alcohol ◽  
Input Method ◽  
Mixture Separation ◽  
Dihydric Alcohol ◽  
Alcohol Mixtures

The effective separation of dimethyl carbonate (DMC) from its methanol mixture through simple, inexpensive and low energy-input method is a promising and challenging field in the process of organic synthesis. Herein, a reversible adsorption strategy through the assistance of superbase and CO2 for DMC/methanol separation at ambient condition was described. The process was demonstrated effectively via the excellent CO2 adsorption efficiency. Notably, the protocol was also suitable to other alcohol (i.e., monohydric alcohol, dihydric alcohol, trihydric alcohol) mixtures. The study provided guidance for potential separation of DMC/alcohol mixture in the scale-up production.

scholarly journals An Efficient Protocol for the Production of Pymetrozine via a New Synthetic Strategy

2018 ◽  
Vol 42 (8) ◽  
pp. 434-438
Author(s):  
Qifan Zhou ◽  
Fangyu Du ◽  
Yajie Shi ◽  
Wenqiang Liu ◽  
Dongdong Liu ◽  
...  
Keyword(s):  
Dimethyl Carbonate ◽  
Scale Up ◽  
Total Yield ◽  
Synthetic Method ◽  
Synthetic Route ◽  
Environmental Friendliness ◽  
Synthetic Strategy

A practical four-step synthesis of pymetrozine is reported, starting from a green chemical dimethyl carbonate and using the key intermediate methyl (E)-1-(2-oxopropyl)-2-(pyridin-3-ylmethylene)hydrazine-1-carboxylate. The main advantages of the route include inexpensive starting materials, environmental friendliness, short synthetic route, easy-to-use synthetic method and acceptable overall yield. A scale-up experiment was carried out to provide pymetrozine with 99.84% purity in 53.2% total yield.

Probing solute–solvent interactions using difluorobenzene isomers in water–monohydric-alcohol mixtures

2014 ◽  
Vol 198 ◽  
pp. 392-397 ◽  
Author(s):  
Dale J. Codling ◽  
Gang Zheng ◽  
Tim Stait-Gardner ◽  
William S. Price
Keyword(s):  
Monohydric Alcohol ◽  
Solvent Interactions ◽  
Alcohol Mixtures

scholarly journals The effect of pore structure on the CO2 adsorption efficiency of polyamine impregnated porous carbons

2015 ◽  
Vol 208 ◽  
pp. 129-139 ◽  
Author(s):  
J.A. Arran Gibson ◽  
Andrei V. Gromov ◽  
Stefano Brandani ◽  
Eleanor E.B. Campbell
Keyword(s):  
Pore Structure ◽  
Co2 Adsorption ◽  
Adsorption Efficiency ◽  
Porous Carbons

Experimental investigation, modeling and scale-up of hydrophilic vapor permeation membranes: Separation of azeotropic dimethyl carbonate/methanol mixtures

2013 ◽  
Vol 118 ◽  
pp. 862-878 ◽  
Author(s):  
Johannes Holtbruegge ◽  
Matthias Wierschem ◽  
Simon Steinruecken ◽  
Dorothea Voss ◽  
Lubow Parhomenko ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Dimethyl Carbonate ◽  
Scale Up ◽  
Vapor Permeation

NiAl precipitation in Fe-12w/o Cr-5w/o Ni-4w/o Al

1983 ◽  
Vol 41 ◽  
pp. 202-203
Author(s):  
L.E. Murr ◽  
J.S. Dunning ◽  
S. Shankar
Keyword(s):  
Solid Solution ◽  
Stainless Steel ◽  
Stainless Steels ◽  
Alloy Composition ◽  
Chromium Content ◽  
Scale Up ◽  
Optical Metallography ◽  
Property Evaluation ◽  
310 Stainless Steel ◽  
Microstructural Studies

Aluminum additions to conventional 18Cr-8Ni austenitic stainless steel compositions impart excellent resistance to high sulfur environments. However, problems are typically encountered with aluminum additions above about 1% due to embrittlement caused by aluminum in solid solution and the precipitation of NiAl. Consequently, little use has been made of aluminum alloy additions to stainless steels for use in sulfur or H2S environments in the chemical industry, energy conversion or generation, and mineral processing, for example.A research program at the Albany Research Center has concentrated on the development of a wrought alloy composition with as low a chromium content as possible, with the idea of developing a low-chromium substitute for 310 stainless steel (25Cr-20Ni) which is often used in high-sulfur environments. On the basis of workability and microstructural studies involving optical metallography on 100g button ingots soaked at 700°C and air-cooled, a low-alloy composition Fe-12Cr-5Ni-4Al (in wt %) was selected for scale up and property evaluation.

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