Removal and immobilization of arsenic from copper smelting wastewater using copper slag by in situ encapsulation with silica gel

2020 ◽  
Vol 394 ◽  
pp. 124833 ◽  
Author(s):  
Yongkui Li ◽  
Xing Zhu ◽  
Xianjin Qi ◽  
Bo Shu ◽  
Xin Zhang ◽  
...  
Keyword(s):  
Silica Gel ◽  
Copper Slag ◽  
Copper Smelting ◽  
Smelting Wastewater

Efficient removal of arsenic from copper smelting wastewater in form of scorodite using copper slag

2020 ◽  
Vol 270 ◽  
pp. 122428 ◽  
Author(s):  
Yongkui Li ◽  
Xing Zhu ◽  
Xianjin Qi ◽  
Bo Shu ◽  
Xin Zhang ◽  
...  
Keyword(s):  
Copper Slag ◽  
Copper Smelting ◽  
Efficient Removal ◽  
Removal Of Arsenic ◽  
Smelting Wastewater

Formation of an anchored copper(II) complex on a thiourea-functionalized silica gel by in situ modification of the tethered ligating function

1994 ◽  
Vol 221 (1-2) ◽  
pp. 183-186 ◽  
Author(s):  
Daniele Cauzzi ◽  
Giovanni Predieri ◽  
Antonio Tiripicchio ◽  
Roberto Zanoni ◽  
Camillo Giori
Keyword(s):  
Silica Gel ◽  
Functionalized Silica ◽  
In Situ Modification

scholarly journals CAAC Boranes. Synthesis and characterization of cyclic (alkyl) (amino) carbene borane complexes from BF3 and BH3

2010 ◽  
Vol 6 ◽  
pp. 709-712 ◽  
Author(s):  
Julien Monot ◽  
Louis Fensterbank ◽  
Max Malacria ◽  
Emmanuel Lacôte ◽  
Steven J Geib ◽  
...  
Keyword(s):  
Silica Gel ◽  
Synthesis And Characterization ◽  
Gel Chromatography ◽  
Nmr Analysis ◽  
X Ray ◽  
X Ray Crystallography ◽  
In Situ Formation ◽  
Silica Gel Chromatography

In situ formation of two cyclic (alkyl) (amino) carbenes (CAACs) followed by addition of BF3•Et2O provided the first two examples of CAAC–BF3 complexes: 1-(2,6-diisopropylphenyl)-3,5,5-trimethyl-3-phenylpyrrolidin-2-ylidene trifluoroborane, and 2-(2,6-diisopropylphenyl)-3,3-dimethyl-2-azaspiro[4.5]decan-1-ylidene trifluoroborane. These CAAC–BF3 complexes are robust compounds that are stable to ambient laboratory conditions and silica gel chromatography. They were characterized by spectroscopy and X-ray crystallography. In contrast, a CAAC complex with borane (BH3) was readily formed in situ according to 1H and 11B NMR analysis, but did not survive the workup conditions. These results set the stage for further studies of the chemistry of CAAC boranes.

The Acceleration of the Rearrangement of α-Hydroxy Aldimines by Lewis or Brønsted Acids

Synlett ◽  
2018 ◽  
Vol 29 (15) ◽  
pp. 2015-2018 ◽  
Author(s):  
William Wulff ◽  
Xin Zhang ◽  
Yijing Dai
Keyword(s):  
Silica Gel ◽  
Efficient Method ◽  
Bronsted Acids ◽  
High Yields

An efficient method was developed for the synthesis of α-amino ketones from α-hydroxy imines. The reaction occurs through an α-iminol rearrangement involving the migration of a substituent of the carbinol carbon to the imine carbon. The optimal catalysts were found to be silica gel or montmorillonite K 10, which effected migration of a variety of aryl and alkyl substituents in high yields. The rearrangement can also be carried out on imines generated in situ from aldehydes and amines in essentially the same yields as those from the preformed imines.

Adsorption Capacity of Poly[4-Methacroyloxy-(4’-Carboxy-3-СHloro)-Azobenzene], In Situ Immobilized on the Silica Gel Surface to Toxic Metals Ions

2018 ◽  
Vol 672 (1) ◽  
pp. 92-103 ◽  
Author(s):  
E. Yanovska ◽  
I. Savchenko ◽  
Y. Polonska ◽  
L. Ol’khovik ◽  
D. Sternik ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Silica Gel ◽  
Toxic Metals

scholarly journals Azocontaining polymers, in situ immobilized on the silica gel surface

2018 ◽  
Vol 673 (1) ◽  
pp. 39-47 ◽  
Author(s):  
Y. Polonska ◽  
E. Yanovska ◽  
I. Savchenko ◽  
L. Ol’khovik ◽  
D. Sternik ◽  
...  
Keyword(s):  
Silica Gel
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