Showing papers on "Wet oxidation published in 1978"

Wet oxidation system employing phase separating reactor

Abstract: Processes are provided for accomplishing wet oxidation using a reaction zone wherein the gas phase (oxygen) is allowed to pass therethrough at a flow rate independent of the liquid phase (waste water) flow rate so that more oxygen can be supplied to a given volume of waste water than is possible for a conventional reactor of the equivalent size. A high efficiency wet oxidation is provided by which the process technology can be practiced either in a single stage or multistage. The reactor is directed to operate at temperatures ranging from about 350° to 600° F. at pressures ranging from about 800 to 2200 psig and the reactor provides a gas phase/liquid phase separation feature.

Catalyzed wet oxidation process and catalyst useful therein

Abstract: An improved wet oxidation process for oxidizing an aqueous dispersion of organic matter under heat and pressure utilizing a manganese oxide containing catalyst. A supported manganese oxide containing catalyst structure is provided.

Method for producing SNG or SYN-gas from wet solid waste and low grade fuels

Abstract: Peat, lignite, coal, many forms of biomass (land or marine) and solid wastes may have from 1/2 to 30 times as much water associated with the dry solids. Some of this water may be chemically bound or otherwise may be practically inseparable by mechanical means. The solids may be partially oxidized by oxygen or air in the first chemical reactions of a Wet Air Oxidation (WAO) taking place in the presence of the large amount of water at temperatures of 175° C. to 325° C. and pressures of 10 to 100 atmospheres--preferably 240° to 300° C. and 70 to 100 atmospheres. All sulfur in high sulfur coal is oxidized selectively to the sulfate radical; and heat to bring the combustible up to the necessary temperature is supplied by burning part of the combustible itself. The sulfur free coal may be used as conventionally. Residual solids (now 70 to 95% of the original fuel) have a higher heating value on a dry basis, and are mechanically separated from all but 1/2 to 2 pounds of water. These solids come from the dewatering unit at a high pressure and may be passed, without loss of pressure or temperature, to be gasified in conventional processes and gasifiers, again by partial oxidation.

Wet oxidation of coal for generation of heat energy

Abstract: A process for oxidizing coal by wet oxidation to produce recoverable heat energy without generating gaseous sulfur-containing by-products. A slurry containing 0.5 or more weight percent coal particles and a stream of oxygen-containing gas are charged to a reaction zone maintained at 475° to 650° F. with pressures of 1400 to 3000 psig.

Wet oxidation engine

Abstract: A reactor vessel is established wherein a fuel is oxidized within an inert oxygen-carrier liquid. A portion of the heat of oxidation is used to raise steam. In one embodiment a double acting engine is interconnected to the reactor vessel wherein the first stroke of the piston is actuated by exhaust gases from the products of oxidation and the return stroke of the piston is actuated by the said steam. In other embodiments generated gases are used to power a turbine and a gas lift pump.

Wet oxidation of materials

Abstract: Materials with unfulfilled chemical oxygen demand are oxidized in a liquid environment at superatmospheric temperatures and pressures. The liquid environment is created within a pressure vessel by an inert liquid that is capable of absorbing and dispersing oxygen. Generated heat is captured for further useful work.

Suppression of Oxidation-Induced Stacking Fault Formation in Silicon by High Pressure Steam Oxidation

Abstract: Suppression of oxidation-induced stacking fault (OSF) formation in silicon was investigated using a high pressure steam oxidation system. The OSF length and density could be significantly reduced by the high pressure steam oxidation compared with the conventional wet oxidation at atmospheric pressure. The length of OSF was found to be proportional to the grown oxide thickness for both oxidations.

Regeneration method of active carbon

Abstract: PURPOSE:Eo enhance recovery rate of adsorption property of active carbon to be regenerated by reducing burning loss in a treatment under a low temperature and pressure through heating thereof in a wet oxidation treatment and with the presence of mineral acid.

Method of treating waste water

Abstract: PURPOSE: To provide a method of treating waste water containing substance to be oxidized which does not corrode by wet oxidizing the waste water under the condition of initial pH of 12 or higher by employing catalyst prepared by adding copper compound to hydroxide alkaline aqueous solution CONSTITUTION: Waste water is reacted in liquid phase under the conditions of pH of 12 or higher at higher than 100°C before wet oxidation reaction with catalyst of purple or blue aqueous solution obtained by adding copper compound to hydroxide alkaline aqueous solution in the waste water containing substance to be oxidized for producing separated acid by oxidation such as, for example, organic compound containing sulfur contained compound such as thioalcohol, chlorine such as chloroform Since the reaction is conducted under alkaline condition, the material of the device is not corroded COPYRIGHT: (C)1979,JPO&Japio

Apparatus for the wet oxidation of sulphur and the capture of generated heat

Abstract: Reactor pressure vessel with reactant fluid injectors for forming a liquid environment of an oxygen carrier fluid, sulphur and water in the presence of a catalyst to yield sulphuric acid and heat exchangers to capture generated heat.

Method of decoloring wet oxidation liquid for sewer sludge

Abstract: PURPOSE:To reduce running cost and simplify the equipment through accurate removal of coloring substance from wet oxidation liquid by increasing multiplicative effect with joint addition of calcium carbonate and ferric chloride.

Regenerating method for inorganic synthetic adsorbents

Abstract: PURPOSE:To enable inorganic synthetic adsorbents, contg. Fe, Al or Ca, Mg metal components and formed by the co-precipitating process, to be regenerated and reutilized many times efficiently by a simple process, by regenerating and activating them after use by a wet oxidation process.

Reducing the ammonia content of effluent - which has been subjected to wet oxidation, by adding sodium nitrite soln.

Abstract: The treatment of an industrial effluent is given in which an unacceptably high ammonia level is present in the drainage system after is has been subjected to wet oxidn. with gases contg. free O2 at 200-300 degrees C esp. 250-300 degrees C, and a pressure of 20-200 Bars, esp. 100-150 Bars. The treatment comprises adding NaNO2 soln. to the effluent to convert the ammonia to N2 and water sufficiently to fulfil discharge legislative conditions. The effluent is esp. from the prodn. of dyestuff intermediates (e.g. naphthylamino sulphonic acids and aminonaphthalene sulphonic acid) acrylonitrile, plastics such as epoxy resins or N-contg. herbicides. The ammonia content of the discharged, treated effluent fulfils legislative conditions.