Merck + Co., Inc.

Subash C Seth

Youssef El-Shoubary

Rudy Maes

Ned A Speizer

William F Lavosky

A carbon-based, adsorption powder containing an effective amount of cupric chloride suitable for removing mercury from a high temperature, high moisture gas stream, wherein the effective amount of cupric chloride ranges from about 1 to about 45 wt percent. Additional additives, such as potassium permanganate, calcium hydroxide, potassium iodide and sulfur, may be added to the powder to enhance the removal of mercury from the gas stream.

Carbon-based adsorption powder containing cupric chloride

An adsorption powder for removing mercury and other metals, dioxins, furans and other organic compounds from metal- and organic compound-comtaminated soil and method therefor. The adsorption powder may be characterized as containing from about 1 to 97% of carbon, from about 1 to 97% of calcium hydroxide, from about 1 to 97% of cupric chloride, and from about 1 to 60% of KI impregnated carbon. The method of the invention may be characterized by the steps of: a) placing metal- and organic compound-contaminated soil in a kiln/drum; b) heating the kiln/drum to form a gas, wherein the gas contains the metal- and organic contaminated soil; c) transferring the gas to an exhaust cleaning unit/afterburner and the soil to a cooling unit; d) heating the gas in the cleaning unit/afterburner; e) cooling the gas and adding the adsorption powder thereto to produce a powder-containing gas component; f) transferring the powder-containing gas component to a baghouse; and g) releasing the substantially mercury-free gaseous component to the atmosphere.

Adsorption powder for removing mercury from high temperature, high moisture gas streams

There is disclosed an adsorption powder effective for capturing mercury from a high temperature, high moisture gas stream comprising: about 1-97% carbon; about 1-97% of alkaline material; about 1-97% cupric chloride impregnated carbon, and about 1-60% carbon impregnated with KI . Additionally, a method of removing mercury from high temperature, high moisture gas streams, using the adsorption powder of the invention, is disclosed.

Adsorption power for removing mercury from high temperature high moisture gas streams

There is disclosed an adsorption powder effective for capturing mercury from a high temperature, high moisture gas stream comprising: about 1-97% carbon; about 1-97% calcium hydroxide; about 1-97% cupric chloride impregnated carbon, and about 1-60% carbon impregnated with KI . Additionally, a method of removing mercury from high temperature, high moisture gas streams is disclosed.

Process for adsorption of mercury from gaseous streams

The present invention relates to a process for cleaning mercury-contaminated soils that is simple, efficient and safe to use. This process can also be used to clean soils contaminated with additional metals, such as zinc, copper and lead, at a lower pH. The invention involves treating contaminated soils with solid hypochlorite in a continuous counter-current process.

Process for cleaning mercury-contaminated soils

The present invention relates to a process for treating contaminated water to precipitate metals without increasing the total dissolved solids content. In particular, the invention relates to the use of phosphoric acid and calcium hydroxide or calcium oxide to adjust the pH of chromium contaminated groundwater during the treatment process without increasing the total dissolved solids (TDS).

Method for treating metal contaminated water

The present invention relates to a process for cleaning mercury-contaminated soils that is simple, efficient and safe to use. This process can also be used to clean soils contaminated with additional metals, such as zinc, copper and lead, at a lower pH. The present invention involves screening the contaminated soil to remove unwanted materials, leaching the contaminated soils with hypochlorite in a screw reactor, thickening, leaching with hypochlorite and sodium chloride, thickening again and then separating the mercury-containing liquids from the clean soil. This invention also relates to a process which uses sulfide to treat the mercury-containing liquids.

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Watchung, NJ, United States of America

Subash C Seth