Reductive dechlorination of BCl3 for efficient ammonia borane regeneration

2015 ◽  
Vol 44 (2) ◽  
pp. 753-757 ◽  
Author(s):  
Yingbin Tan ◽  
Lijun Zhang ◽  
Xiaowei Chen ◽  
Xuebin Yu
Keyword(s):  
Reductive Dechlorination ◽  
Ammonia Borane ◽  
Digestion Product ◽  
Chemical Regeneration

Chemical regeneration of ammonia borane (AB) from its digestion product of H2-depleted AB, BCl3, has been implemented based on reduction and ammoniation reactions.

Reductive Dehalogenation of Environmental Contaminants: A Critical Review

1989 ◽  
Vol 24 (2) ◽  
pp. 299-322 ◽  
Author(s):  
R. M. Baxter
Keyword(s):  
Hydrogen Atom ◽  
Aromatic Compounds ◽  
Reductive Dechlorination ◽  
Halogen Atom ◽  
Environmental Contaminants ◽  
Methanogenic Bacteria ◽  
Photochemical Reactions ◽  
Reductive Dehalogenation ◽  
Iron Porphyrins ◽  
Aliphatic Compounds

Abstract It is generally recognized that reductive processes are more important than oxidative ones in transforming, degrading and mineralizing many environmental contaminants. One process of particular importance is reductive dehalogenation, i.e., the replacement of a halogen atom (most commonly a chlorine atom) by a hydrogen atom. A number of different mechanisms are involved in these reactions. Photochemical reactions probably play a role in some instances. Aliphatic compounds such as chloroethanes, partly aliphatic compounds such as DDT, and alicyclic compounds such as hexachlorocyclohexane are readily dechlorinated in the laboratory by reaction with reduced iron porphyrins such as hematin. Many of these are also dechlorinated by cultures of certain microorganisms, probably by the same mechanism. Such compounds, with a few exceptions, have been found to undergo reductive dechlorination in the environment. Aromatic compounds such as halobenzenes, halophenols and halobenzoic acids appear not to react with reduced iron porphyrins. Some of these however undergo reductive dechlorination both in the environment and in the laboratory. The reaction is generally associated with methanogenic bacteria. There is evidence for the existence of a number of different dechlorinating enzymes specific for different isomers. Recently it has been found that many components of polychlorinated biphenyls (PCBs), long considered to be virtually totally resistant to environmental degradation, may be reductively dechlorinated both in the laboratory and in nature. These findings suggest that many environmental contaminants may prove to be less persistent than was previously feared.

scholarly journals Influence of Morphology of Silica-Alumina Composites on Their Activity for Hydrolytic Dehydrogenation of Ammonia Borane

2016 ◽  
Vol 95 (6) ◽  
pp. 480-486 ◽  
Author(s):  
Naoki TOYAMA ◽  
Shinobu OHKI ◽  
Masataka TANSHO ◽  
Tadashi SHIMIZU ◽  
Tetsuo UMEGAKI ◽  
...  
Keyword(s):  
Ammonia Borane ◽  
Silica Alumina ◽  
Alumina Composites

scholarly journals Reductive dechlorination in recalcitrant sources of chloroethenes in the transition zone between aquifers and aquitards

2016 ◽  
Vol 23 (18) ◽  
pp. 18724-18741 ◽  
Author(s):  
Diana Puigserver ◽  
Jofre Herrero ◽  
Mònica Torres ◽  
Amparo Cortés ◽  
Ivonne Nijenhuis ◽  
...  
Keyword(s):  
Transition Zone ◽  
Reductive Dechlorination

Bis(perchlorocatecholato)silane and Heteroleptic Bidonors: Hidden Frustrated Lewis Pairs by Ring Strain

2021 ◽  
Author(s):  
Deborah Hartmann ◽  
Sven Braner ◽  
Lutz Greb
Keyword(s):  
Ammonia Borane ◽  
Frustrated Lewis Pairs ◽  
Ring Strain ◽  
Frustrated Lewis Pair ◽  
Lewis Pairs

Bis(perchlorocatecholato)silane and bidentate N,N- or N,P-heteroleptic donors form hexacoordinated complexes. Depending on the ring strain and hemilability in the adducts, Frustrated Lewis pair reactivity with aldehydes and catalytic ammonia borane...

Zirconium-Hydride-Catalyzed Transfer Hydrogenation of Quinoline and Indole with Ammonia Borane

2021 ◽  
Author(s):  
Xin Cui ◽  
wei huang ◽  
Lipeng Wu
Keyword(s):  
Ammonia Borane ◽  
Transfer Hydrogenation ◽  
Zirconium Hydride ◽  
Indole Derivatives ◽  
Hydride Complex

Herein, by applying zirconium-hydride complex as the catalyst, the transfer hydrogenation of quinoline and indole derivatives with ammonia borane as the proton and hydride source is achieved. Up to 94%...

scholarly journals Biological effects of tourmaline treatment on Dehalococcoides spp. during the reductive dechlorination of trichloroethylene

RSC Advances ◽  
2021 ◽  
Vol 11 (20) ◽  
pp. 12086-12094
Author(s):  
Tielong Li ◽  
Jiaxin Wen ◽  
Bingjie Li ◽  
Shihu Ding ◽  
Wei Wang
Keyword(s):  
Gene Expression ◽  
Cell Proliferation ◽  
Community Structure ◽  
Reductive Dechlorination ◽  
Biological Effects ◽  
Dechlorinating Bacteria ◽  
Contaminated Aquifers ◽  
Tce Degradation ◽  
Induced Changes

To explore the application of mineral in bioremediation of contaminated aquifers, this study investigated tourmaline-induced changes in TCE degradation, community structure, cell proliferation and gene expression of dechlorinating bacteria.

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