This invention provides novel β-lactamase inhibitors of the aryl- and heteroarylsulfonamidomethylphosphonate monoester class having nitrogen-based cations or quarternary ammonium groups. The compounds inhibit three classes of β-lactamases and synergize the antibacterial effects of β-lactam antibiotics (e.g., imipenem and ceftazidime) against those micro-organisms normally resistant to the β-lactam antibiotics as a result of the presence of the β-lactamases. Formula (I) or pharmaceutically acceptable salt thereof.
A method for producing difluoromethane, including the catalytic reaction of dichloromethane with hydrogen fluoride in the liquid phase, in the presence of chlorine, and in the presence of an ionic liquid catalyst consisting of the product of the reaction of antimony pentachloride with an organic salt having the general formula X+A, where A is a halide anion or hexafluoroantimonate, and X+ is a quaternary ammonium cation, quarternary phosphonium or ternary sulfonium. Further, equipment suitable for implementing said method.
[EN] 2-MERCAPTOBENZIMIDAZOLE DERIVATIVES AS CORROSION INHIBITORS<br/>[FR] DÉRIVÉS DE 2-MERCAPTOBENZIMIDAZOLE UTILISÉS EN TANT QU'INHIBITEURS DE CORROSION
申请人:ECOLAB USA INC
公开号:WO2017192514A1
公开(公告)日:2017-11-09
The present invention generally relates to methods and compounds for preventing metal corrosion. More specifically, the method comprises contacting a hydrocarbon-containing liquid with a composition in an effective amount to prevent metal corrosion.
COMPOSITIONS OF HETEROCYCLIC COMPOUNDS AND USES AS SULFIDOGENESIS INHIBITORS
申请人:ChampionX USA Inc.
公开号:US20210238068A1
公开(公告)日:2021-08-05
The present disclosure generally relates to compositions and uses of sulfidogenesis inhibitor compounds of Formulae 1 and 2 for preventing sulfidogenesis, i.e., the reduction reaction of a sulfur-containing compound by sulfur-utilizing prokaryotes that produce sulfide species such as hydrogen sulfide, during enhanced oil recovery processes. A method for inhibiting or decreasing microbial sulfide production by sulfur-utilizing prokaryotes includes addition of an effective amount of sulfidogenesis inhibitor compounds of Formulae 1 and 2 to the fluid that is injected into a sulfidogenic reservoir system during enhanced oil recovery. For example, the compounds can be used as sulfidogenesis inhibitors in a water injection system for use in a hydrocarbon extraction system or a hydrocarbon production system. Thus, these compositions can be effectively used as inhibitors of biogenic hydrogen sulfide generation in oilfield fluids.
Does alkyl chain length really matter? Structure–property relationships in thermochemistry of ionic liquids
作者:Sergey P. Verevkin、Dzmitry H. Zaitsau、Vladimir N. Emel’yanenko、Ricardas V. Ralys、Andrei V. Yermalayeu、Christoph Schick
DOI:10.1016/j.tca.2013.04.003
日期:2013.6
Abstract DSC was used for determination of reaction enthalpies of synthesis of ionic liquids [Cnmim][Cl]. A combination of DSC with quantum chemical calculations presents an indirect way to study thermodynamics of ionic liquids. The indirect procedure for vaporization enthalpy was validated with the direct experimental measurements by using thermogravimetry. First-principles calculations of the enthalpy