scholarly journals Separation and Purification Process of Natural Materials by Using Supercritical Fluids

2005 ◽  
Vol 6 (1) ◽  
pp. 21-28
Author(s):  
Motonobu GOTO
Keyword(s):  
Supercritical Fluids ◽  
Purification Process ◽  
Separation And Purification ◽  
Natural Materials

Stereosequenced crystalline polyhydroxyalkanoates from diastereomeric monomer mixtures

Science ◽  
2019 ◽  
Vol 366 (6466) ◽  
pp. 754-758 ◽  
Author(s):  
Xiaoyan Tang ◽  
Andrea H. Westlie ◽  
Eli M. Watson ◽  
Eugene Y.-X. Chen
Keyword(s):  
Energy Cost ◽  
High Performance ◽  
Polymeric Materials ◽  
Powerful Method ◽  
Purification Process ◽  
Separation And Purification ◽  
Material Loss ◽  
Stereogenic Centers

Stereoselective polymerization of chiral or prochiral monomers is a powerful method to produce high-performance stereoregular crystalline polymeric materials. However, for monomers with two stereogenic centers, it is generally necessary to separate diastereomers before polymerization, resulting in substantial material loss and added energy cost associated with the separation and purification process. Here we report a diastereoselective polymerization methodology enabled by catalysts that directly polymerize mixtures of eight-membered diolide (8DL) monomers with varying starting ratios of chiral racemic (rac) and achiral meso diastereomers into stereosequenced crystalline polyhydroxyalkanoates with isotactic and syndiotactic stereodiblock or stereotapered block microstructures. These polymers show enhanced ductility and toughness relative to polymers of pure rac-8DL, subject to tuning by variation of the diastereomeric ratio and structure of the 8DL monomers.

Silicon separation and purification process from hypereutectic aluminum-silicon for organosilicon use

2021 ◽  
Vol 121 ◽  
pp. 105333
Author(s):  
Yunfei He ◽  
Xi Yang ◽  
Lianfei Duan ◽  
Shaoyuan Li ◽  
Zhengjie Chen ◽  
...  
Keyword(s):  
Purification Process ◽  
Separation And Purification ◽  
Aluminum Silicon

A novel separation and purification process for 1,3-propanediol

2006 ◽  
Vol 41 (3) ◽  
pp. 739-744 ◽  
Author(s):  
Mi-Hae Cho ◽  
Sun Im Joen ◽  
Sang-Hyun Pyo ◽  
Sungyong Mun ◽  
Jin-Hyun Kim
Keyword(s):  
Purification Process ◽  
Separation And Purification

scholarly journals Simultaneous Recovery of Zinc and Manganese from Cadmium-Containing Mixed-Battery Leachate by Separation and Purification Process

2019 ◽  
Vol 60 (6) ◽  
pp. 980-987
Author(s):  
Dong Ju Shin ◽  
Sung-Ho Joo ◽  
Dongseok Lee ◽  
Jin-Tae Park ◽  
Dong Joon Min ◽  
...  
Keyword(s):  
Purification Process ◽  
Separation And Purification

scholarly journals Water Purification Process Uses Adsorbents From Natural

2021 ◽  
Vol 4 (1) ◽  
pp. 42
Author(s):  
Lailatul Fadhilah ◽  
Jasmidi Jasmidi ◽  
Rini Selly ◽  
Moondra Zubir
Keyword(s):  
Water Purification ◽  
Oil Palm ◽  
Water Saturation ◽  
Research Interest ◽  
Purification Process ◽  
Natural Materials ◽  
Rich Material ◽  
New Research

Adsorbent is an adsorption that is used to absorb various pollutants. Adsorbents can be used from natural materials. Natural ingredients that can be used are oil palm empty bunches. Oil palm empty bunches are a carbon-rich material that is getting new research interest in adsorption because of its abundance and properties. Oil palm empty bunches contain carbon, nitrogen, hydrogen, oxygen, sulfur, lignin, hemicellulose, and cellulose. Oil palm empty bunches are used as adsorbent for water saturation.

Sign in / Sign up

Export Citation Format

Share Document