Method for treating halogenated hydrocarbons prior to hydrothermal oxidation
AssigneeModar, Inc.
InventorsGlenn T. Hong, William R. Killilea, Alain L. Bourhis
Life of this patent
Estimating the term…
Abstract
A method for pretreating a halogenated hydrocarbon feed to a hydrothermal oxidation reactor which includes forming a combination of a halogenated hydrocarbon with added alkali under hydrothermal conditions, adding water to the combination, thereby effectuating hydrolysis of the halogenated hydrocarbon so as to liberate halogen ions which are neutralized by the alkali. The neutralized halogen ion, a salt, may be removed from the process prior to or during the oxidation step as brine droplets.
Claims26
In a process for oxidizing halogenated hydrocarbons at temperatures above about 374 .degree.C. and at pressures above about 25 bar, the improvement comprising introducing into an oxidation reactor an oxidizing agent and pretreated halogenated hydrocarbon, wherein the pretreated halogenated hydrocarbon is the reaction product of halogenated hydrocarbon, alkali and water at hydrothermal conditions sufficient to substantially neutralize the halogenated hydrocarbon and further wherein a dense brine phase, formed during the reaction of halogenated hydrocarbon, alkali and water is, optionally, collected and removed prior to the introduction of the pretreated halogenated hydrocarbon into the oxidation reactor.
A method of oxidizing a halogenated hydrocarbon, comprising:
- (a) adding alkali and water to halogenated hydrocarbon at hydrothermal conditions, wherein the alkali and water are added in an amount and for a time sufficient to hydrolyze and substantially neutralize the halogenated hydrocarbon;
- (b) optionally collecting and removing a dense brine phase, formed in step (a), from the hydrolyzed and substantially neutralized halogenated hydrocarbon;
- and
- (c) feeding an oxidizing agent and the hydrolyzed and substantially neutralized halogenated hydrocarbon into an oxidation reactor and reacting at supercritical conditions said halogenated hydrocarbon and oxidizing agent;
- and
- (d) removing the oxidation products from the oxidation reactor.
A method for oxidizing a halogenated hydrocarbon, comprising:
- (a) adding alkali and water to halogenated hydrocarbon at non-oxidative conditions wherein the temperature is at least about 150 .degree.C. and the pressure is at least about 25 bar, wherein the alkali and water are added in an amount and for a time sufficient to hydrolyze and substantially neutralize the halogenated hydrocarbon;
- (b) optionally separating a dense brine phase, formed in step (a), from the hydrolyzed and substantially neutralized halogenated hydrocarbon;
- (c) feeding the hydrozyzed and substantially neutralized hydrocarbon and an oxidizing agent into an oxidation reactor and reacting said hydrocarbon and oxidizing agent at supercritical conditions;
- and
- (d) removing the oxidation products from the oxidation reactor.
Dependencies are inferred from the claim text.