ChemInform Abstract: Use of a Heterogeneous Solid-Liquid Medium in the Fine Chemistry of Lipids

ChemInform ◽  
2010 ◽  
Vol 23 (3) ◽  
pp. no-no
Author(s):  
E. BORREDON ◽  
Z. MOULOUNGUI ◽  
Y. LE BIGOT ◽  
M. DELMAS ◽  
A. GASET
Keyword(s):  
Liquid Medium ◽  
Fine Chemistry ◽  
Solid Liquid ◽  
Heterogeneous Solid

scholarly journals Improved Understanding of the Sulfidization Mechanism in Amine Flotation of Smithsonite: An XPS, AFM and UV–Vis DRS Study

Minerals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 370 ◽  
Author(s):  
Ruizeng Liu ◽  
Bin Pei ◽  
Zhicheng Liu ◽  
Yunwei Wang ◽  
Jialei Li ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance Spectroscopy ◽  
High Reactivity ◽  
Phase Imaging ◽  
Solid Product ◽  
Force Microscopy ◽  
Atomic Force ◽  
Liquid Reaction ◽  
Solid Liquid ◽  
Heterogeneous Solid

Sulfidization is required in the amine flotation of smithsonite; however, the sulfidization mechanism of smithsonite is still not fully understood. In this work, X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and UV–vis diffuse reflectance spectroscopy (UV–vis DRS) were used to characterize sulfidized and unsulfidized smithsonite. The XPS and UV–vis DRS analyses showed that smithsonite sulfidization is a transformation of ZnCO3 to ZnS on the smithsonite surfaces. However, this transformation is localized, resulting in the coexistence of ZnCO3 and ZnS or in the formation of ZnS island structures on the sulfidized smithsonite surfaces. AFM height imaging showed that sulfidization can substantially change the surface morphology of smithsonite; in addition, AFM phase imaging demonstrated that sulfidization occurs locally on the smithsonite surfaces. Based on our findings, it can be concluded that smithsonite sulfidization is clearly a heterogeneous solid–liquid reaction in which the solid product attaches at the surfaces of unreacted smithsonite. Smithsonite sulfidization involves heterogeneous nucleation and growth of ZnS nuclei. Moreover, the ZnS might nucleate and grow preferentially in the regions with high reactivity, which might account for the formation of ZnS island structures. In addition, sphalerite-structured ZnS is more likely to be the sulfidization product of smithsonite under flotation-relevantconditions, as also demonstrated by the results of our UV–vis DRS analyses. The results of this study can provide deeper insights into the sulfidization mechanism of smithsonite.

Aldehydes and Ketones Epoxidation with Trimethylsulfonium Bromide in a Slightly Hydrated Solid-Liquid Medium

1987 ◽  
Vol 17 (5) ◽  
pp. 503-513 ◽  
Author(s):  
H. Bouda ◽  
M. E. Borredon ◽  
M. Delmas ◽  
A. Gaset
Keyword(s):  
Liquid Medium ◽  
Aldehydes And Ketones ◽  
Solid Liquid

scholarly journals Effect Of Cross Linking On the Toxicity of CDTE QDS in Solid/ Liquid Medium

2017 ◽  
Vol 03 (03) ◽  
pp. 60-64
Author(s):  
Poonam Bichpuria ◽  
Anjali Oudhia ◽  
Pragya. Kulkarni
Keyword(s):  
Liquid Medium ◽  
Cross Linking ◽  
Cdte Qds ◽  
Solid Liquid

Pelletization and Granulation of Calcium Oxide Powder Based on Eggshell

2017 ◽  
Vol 873 ◽  
pp. 135-139
Author(s):  
Nuchnapa Tangboriboon
Keyword(s):  
Particle Size ◽  
Chemical Composition ◽  
Liquid Medium ◽  
Functional Groups ◽  
Calcium Oxide ◽  
Starch Content ◽  
Average Particle ◽  
Wet Process ◽  
Particle Size Analyzer ◽  
Solid Liquid

The objective in this study focuses oncalcium oxide pellets and granules preparation made from hen eggshellmixed with polysaccharides acted as a binder by wet process. There are many factors effect to size and shape of pellets and granules i.e. types, amount, particle size of binders, viscosityof mixture, and temperature of liquid medium. An important factor is types of binder effect to particle design, nuclei formation, solid-liquid interaction, amount and size of porosity, and pellets/granules dispersion.In this study, all-purpose flour is one kind of polysaccharides and organic binders which is the most suitable for calcium oxide pellets and granules preparation. The average particle, viscosity, amount of starch content of all-purpose flour are equal to 35.9 µm, 1,864 ± 8 cp, 115 ± 1 RVU including non-toxic and less expensive.Furthermore, the chemical composition, particle size, viscosity, and chemical functional groups were measured by using XRF, particle size analyzer, viscometer, and FTIR, and are reported here.

Sulfidization mechanism in the flotation of cerussite: A heterogeneous solid-liquid reaction that yields PbCO3/PbS core-shell particles

2020 ◽  
Vol 153 ◽  
pp. 106400 ◽  
Author(s):  
Jialei Li ◽  
Siyan Liu ◽  
Dianwen Liu ◽  
Ruizeng Liu ◽  
Zhicheng Liu ◽  
...  
Keyword(s):  
Core Shell ◽  
Liquid Reaction ◽  
Shell Particles ◽  
Solid Liquid ◽  
Heterogeneous Solid
Sign in / Sign up

Export Citation Format

Share Document