# US 8,541,640 B2 · Process for the destruction of toxic residues via oxidation in presence of water and oxygen and continuous mobile unit to treat hazardous compounds

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- Number: US 8,541,640 B2
- Document ID: US8541640B2
- Status: Granted
- Kind: B2
- Application number: 13/133,195
- Filed: 2009-12-17
- Published: 2011-09-29
- Granted: 2013-09-24
- Earliest claimed: 2008-12-19
- Assignees: Universidad Del Valle
- Applicants: Gustavo Eduardo Bolanos Barrera; Victor Fernando Marulanda Cardona
- Inventors: Gustavo Eduardo Bolanos Barrera; Victor Fernando Marulanda Cardona
- Web page: https://patentgrep.com/patent/US8541640B2

## CPC

- A62D 3/20: by hydropyrolysis or destructive steam gasification, e.g. using water and heat or supercritical water, to effect chemical change
- A62D 3/38: by oxidation; by combustion
- A62D 2101/22: containing halogen
- A62D 2101/26: containing nitrogen or phosphorus
- A62D 2203/04: Combined processes involving two or more non-distinct steps covered by groups A62D3/10 - A62D3/40
- A62D: CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS

## Abstract

Process for the destruction of toxic residues via oxidation in the presence of water and oxygen developed in homogenous phase at temperatures over 374° C. and pressure of at least 220 atmospheres and a continuous mobile unit easily transferred to treat effluents or contaminated media. This mobile unit is composed of a reactor, which includes pressurization, reaction, cooling, depressurization and sampling zones for the destruction of toxic residues like polychloride biphenyls (PCBs), pyridines, and other hazardous compounds.

## Claims

### Claim 1

A process for destruction of toxic wastes through oxidation in the presence of water which comprises the following stages:
(a) mix a toxic waste contaminated oily liquid with water at ambient temperature and a non-ionic emulsifying agent with Hydrophilic-lipophilic balance (HLB) between 10 and 20 and agitate the mixture to form an emulsion, wherein the water is present at 40% by weight;
(b) bring the emulsion from stage a) to a pressure between 22,291 and 40,530 kPa and to a temperature between 643 and 853K;
(c) bring an oxidant selected from the group consisting of aqueous hydrogen peroxide, potassium permanganate, potassium dichromate, manganese dioxide and combinations thereof to a pressure between 22,291 and 40,530 kPa;
(d) heat in a first stage the oxidant from stage c) up to a temperature between 573 and 643 K and in a second stage up to a temperature between 644 and 853 K;
(e) mix in a reaction unit the emulsion from stage a) and the oxidant from stage d) at a temperature between 644 and 853 K and at pressure between 22,291 and 40,530 kPa during a period of time between 30 seconds and 5 minutes yielding an effluent
(f) subject to cooling the effluent from stage e) at a temperature equal to or below 298 K; and
(g) separate and store in a gas stream and a liquid stream homogeneous phases obtained in stage f).

### Claim 2 (depends on 1)

A process according to claim 1 further characterized in that stage e) from the oxidation process approaches an adiabatic operation.

### Claim 3 (depends on 1)

A process according to claim 1 wherein in either stage a) or in stage f) an alkaline agent selected from the group consisting of NaOH and KOH is added to neutralize acids formed during the oxidation stage of organochlorine.

### Claim 4 (depends on 1)

A process according to claim 1 further characterized in that the addition of alkalizing salts is not required for pre-treatment of the toxic waste contaminated oily liquid.

### Claim 5 (depends on 1)

A process for the destruction of toxic wastes according to claim 1 wherein, the mixture created in stage (a) is agitated by an ultrasound probe to form an emulsion.

### Claim 6 (depends on 5)

A process for the destruction of toxic wastes according to claim 5 wherein, the ultrasound probe's intensity is between 5 to 30 Kilohertz for at least one minute.

### Claim 7 (depends on 1)

A process according to claim 1 further characterized in that stage (e) proceeds in the presence of a heterogeneous catalyst selected from the group consisting of Fe3O4, MnO2, CuO, NiO, Al2O3, Cu3O4, and Pt.