14-07-2016 дата публикации
Номер: US20160200605A1
Принадлежит:
There is described a process for treatment of a fluid comprising an oxidizable contaminant. The process comprises the step of contacting the wastewater with a combination of: (i) a sulfide, (ii) a complex of Fe(III) and a chelating agent, and (iii) an oxidant. It has been discovered that of treatment of a fluid containing an oxidizable contaminant employing iron(III)-chelates as the Fenton catalyst may be significantly improved by including a sulfide in the reaction scheme. As described herein, by employing sulfide ion, the present inventors have been able to: (i) increase the rate of iron recycling from minutes or hours to a few seconds, and (ii) destroy benzene in an oil and gas refinery (OGR) wastewater in less than one minute. It is believed that these findings in OGR wastewater can be extended to other fluids containing other oxidizable contaminants. 1. A process for treatment of a fluid comprising an oxidizable contaminant , the process comprising the step of contacting the wastewater with a combination of: (i) a sulfide , (ii) a complex of Fe(III) and a chelating agent , and (iii) an oxidant.2. The process defined in claim 1 , wherein the contacting step is conducted at a pH in the range of from about 6.5 to about 10.34-. (canceled)5. The process defined in claim 1 , wherein the chelating agent is selected from the group consisting of nitrilotriacetic acid (NTA) claim 1 , ethylenediamine-N claim 1 ,N′-tetraacetic acid (EDTA) claim 1 , diethylenetriaminepentacetic acid (DTPA) claim 1 , ethylenediamine-N claim 1 ,N′-disuccinic acid (EDDS) claim 1 , iminodisuccinic acid (IDS) claim 1 , methylglycinediacetic (MGA) claim 1 , phosphonomethyliminodiacetic acid (PDA) and N-(2-carboxyethyl)iminodiacetic acid (CEDA).67-. (canceled)8. The process defined in claim 1 , wherein the oxidizable contaminant is selected from the group consisting of gasoline claim 1 , MtBE claim 1 , EtBE claim 1 , BTEX (benzene-toluene-ethylbenzene-xylenes) claim 1 , chlorobenzene claim 1 , ...
Подробнее