A toxic halogenated organic cpd. is decomposed by reacting it with a reagent consisting of (a) at least one cpd. selected from polyethyleneglycols, Nixolen (RTM), alcohols and polyhydroxy cpds. (b) a weak base, or when Nixolen (RTM) is used, alkali or alkaline-earth metal alkoxides and (c) an oxidising agent or a source of radicals. The polyethyleneglycols and alcohols used have the formula (I) where x=2; n=0 or an integer from 2-400; R=linear or branched 1-4C alkyl, when n=0 and R=H, linear or branched 1-20C alkyl, aryl, aralkyl, or acyl when n=2-400. R1 and R2=H, linear or branched 1-4C alkyl, 5-8C cycloalkyl, opt. substd. or aryl opt. substd. R1 and R2 may be the same or different. Nixolen lubricating oils are liq. cpds. derived from the condensation between propylene oxide and ethylene oxide. The polyhydroxy cpd. used has the formula -(CH(OR3)-CH2)n where n=100-10,000 and R3=H or linear or branched 1-6C alkyl. The reaction is carried out pref. at room temp., in the absence of air or oxygen, and in the presence of or in the absence of solvents, miscible or immiscible with the reagent. This decontamination process is made more effective, if during the reaction the reagent is sometimes stirred and heated to make easier the diffusion of the different components. For the decontamination of soil and surfaces, the process is carried out in the presence of microwaves, electric fields, ultrasound, infrared or laser. When the process is carried out in the presence of microwaves, the polluted surfaces are previously treated with microwaves. The reaction rate in the presence of microwaves is at least 10 times higher than that obtd. in their absence.

Decomposition of toxic halogenated organic cpds.

TUNDO, Pietro
1988

Abstract

A toxic halogenated organic cpd. is decomposed by reacting it with a reagent consisting of (a) at least one cpd. selected from polyethyleneglycols, Nixolen (RTM), alcohols and polyhydroxy cpds. (b) a weak base, or when Nixolen (RTM) is used, alkali or alkaline-earth metal alkoxides and (c) an oxidising agent or a source of radicals. The polyethyleneglycols and alcohols used have the formula (I) where x=2; n=0 or an integer from 2-400; R=linear or branched 1-4C alkyl, when n=0 and R=H, linear or branched 1-20C alkyl, aryl, aralkyl, or acyl when n=2-400. R1 and R2=H, linear or branched 1-4C alkyl, 5-8C cycloalkyl, opt. substd. or aryl opt. substd. R1 and R2 may be the same or different. Nixolen lubricating oils are liq. cpds. derived from the condensation between propylene oxide and ethylene oxide. The polyhydroxy cpd. used has the formula -(CH(OR3)-CH2)n where n=100-10,000 and R3=H or linear or branched 1-6C alkyl. The reaction is carried out pref. at room temp., in the absence of air or oxygen, and in the presence of or in the absence of solvents, miscible or immiscible with the reagent. This decontamination process is made more effective, if during the reaction the reagent is sometimes stirred and heated to make easier the diffusion of the different components. For the decontamination of soil and surfaces, the process is carried out in the presence of microwaves, electric fields, ultrasound, infrared or laser. When the process is carried out in the presence of microwaves, the polluted surfaces are previously treated with microwaves. The reaction rate in the presence of microwaves is at least 10 times higher than that obtd. in their absence.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in ARCA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10278/31378
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact