Aluminium sulfate and sodium aluminate buffer solutions for the destruction of phosphorus based chemical warfare agents

The destruction of phosphorus based chemical warfare agents using aqueous buffer mixtures of aluminum sulfate (alum) and sodium aluminate is pursued. The production of VX (O-ethyl-S-[2-(diisopropylamino)ethyl]-methylphosphonothiolate) hydrolysis products ethyl methyl phosphonic acid (EMPA), an aluminum complex of EMPA, and S-[2-(diisopropylamino)ethyl]methylphosphonothiolate (EA-2192) is characterized in acidic and basic alum buffers. The study employs 31 P high resolution magic angle nuclear magnetic resonance spectroscopy (HRMAS NMR) for both quantitative and qualitative analysis. The acidic buffer results in a slower reaction rate and is less effective than the basic buffer.

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Further studies into the feasibility of using aqueous alum solutions in the destruction of VX

Williams

Creasy

Fry³

et al. 2010

Main Group Chemistry

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Dealkylation of chemical weapon agents and pesticides with group 13 salen compounds

Butala

Cooper

Mitra

et al. 2010

Main Group Chemistry

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Group 13 chelates incorporating boron and aluminum deactivated the chemical warfare agents (CWAs) VX, sarin (GB), soman (GD), and the pesticide, diazinon, under mild conditions. The deactivation occured through elimination of alkyl bromide resulting in solid products containing a robust Al-O-P or B-O-P linkage. The Group 13 chelate deactivation methodology produces non-toxic, easily disposable solid proudcts after combination with CWAs. In previous studies the group 13 chelates were found to be active for a wide range of organophosphates, organophosphonates, and organophosphinates (OPs). Thus, the compounds could be used as a deactivating agent for a wide range of problematic compounds possessing P-O-C linkages, including, CWAs, pesticides, and plasticizers. The majority of the chelate compounds are of the general formula: LBX , L(BX2)2 and LAlX where L = an inexpensive, easily prepared Schiff base chelate and X = Cl and Br. This article will describe the range of compounds that can be used in the dealkylation reaction. The primary focus will be on chelates of the Salen class (Salen = N, N ′ -alkylene(or arylene)bis(salicylideneimine)), but a wider of range of chelates could be used for the reaction as this review will demonstrate.

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Aluminium sulfate and sodium aluminate buffer solutions for the destruction of phosphorus based chemical warfare agents

Cited by 2 publications

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Further studies into the feasibility of using aqueous alum solutions in the destruction of VX

Further studies into the feasibility of using aqueous alum solutions in the destruction of VX

Dealkylation of chemical weapon agents and pesticides with group 13 salen compounds

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