Olin Corporation

Sunbelt Chlor Alkali Partnership

Sanders H Moore

Ronald L Dotson

David W Cawlfield

Maurice R Smith

James F Pickering

Morton S Kircher

Robert T Brooker

David B Wright

Richard C Ness

Harry J Loftis

Leonard L Scott

Carey O Burger

Jay S Stirrat

Randall Taylor Morris

Awuri Priye Asuru

James M Ford

John O Adams

Donald B Loftis

Harvey B Cochran

Brian D Sharpe

Elizabeth K Walter

Thomas E Corvin

Jeffery D Casteel

Phillip J Reed

Richard E Mellor

Jonathan B Diminnie

The present invention provides compositions comprising comminuted sodium hypochlorite pentahydrate crystals with an average length-to-diameter ratio of less than about 20:1, and a mother liquor saturated in sodium hypochlorite, which has excess alkalinity and/or one or more additional alkali or alkali earth metal salts. Processes for preparing these compositions will be presented.

Sodium hypochlorite compositions

A sodium hypochlorite composition comprising between about 25% and about 40% sodium hypochlorite, in the form of a slurry of sodium hypochlorite pentahydrate crystals in a mother liquor saturated in sodium hypochlorite. The composition can include sodium chloride, and an alkai stabilizer such as sodium hydroxide and sodium carbonate. The slurry is preferably between about &#x2212;15&#xb0; C. and about 10&#xb0; C. A method of transporting or storing sodium hypochlorite is also provided in which the sodium hypochlorite is in the form of a slurry of sodium hypochlorite pentahydrate crystals in a mother liquor saturated in sodium hypochlorite. The composition can include sodium chloride, and an alkali stabilizer such as sodium hydroxide and sodium carbonate. The slurry is preferably between about &#x2212;15&#xb0; C. and about 10&#xb0; C.

Sodium hypochlorite composition and method of storing and transporting sodium hypochlorite

Process of removing carbon dioxide from a chlor/alkali plant tail gas stream

A process for reducing the corrosion of nickel metal in an alkali metal hydroxide evaporator equipment which comprises the step of impressing a total protection potential directly upon the nickel metal material in alkali metal hydroxide evaporator that is in contact with an aqueous alkali metal hydroxide solution during evaporation of that solution; said total potential being sufficient to reduce the amount of corrosion of the nickel metal to an oxide that may dissolve in the alkali metal hydroxide solution.

Alkali metal hydroxide evaporator system

A propellant module assembly is adapted for containing a liquid propellant which is used to inflate a vehicular air bag. The module assembly includes an igniter; a liquid propellant; a propellant and igniter capsule; and a rupturable closure member. The capsule and rupturable member are compatible with, and will not deteriorate as a result of contact with the liquid propellant. The liquid propellant, when ignited, will not produce toxic gases, and will not subject vehicle occupants to the possibility of chemical burns, as can occur with solid propellants.

Propellant module assembly

The present invention relates to a multi-step process for producing HAN that is free of ammonium nitrate. The process comprises the steps of: (a) stripping ammonia from an ammonia-containing, aqueous hydroxylamine solution having a hydroxylamine concentration of at least 10% by weight based upon the weight of the hydroxylamine solution, by contacting the ammonia-containing hydroxylamine solution with a stripping agent selected from the group consisting of inert gases and steam to provide an ammonia-free, aqueous hydroxylamine solution, and (b) reacting the ammonia-free, aqueous hydroxylamine solution with aqueous nitric acid having an acid concentration of at least about 0.1%, preferably at least about 20%, based upon the weight of the aqueous nitric acid, to produce ammonium nitrate-free HAN. In another process embodiment of the invention, the above-described ammonia stripping step is not required, and the hydroxylamine concentration is at least about 0.5%, based upon the weight of the reaction mixture employed. Also disclosed is the ammonium nitrate-free HAN product produced by the process of this invention.

Hydroxylammonium nitrate free of ammonium nitrate

A process for treating solutions of a hydroxylammonium salt containing excess acid which comprises:

Process for treating aqueous solutions of hydroxylamine salts containing

A process for the removal of mercury from industrial waste streams is disclosed wherein the waste stream is a nitrate based solution that has been decomposed by the addition of hypochlorite. The method involves adding a reducing agent to reduce the hypochlorite and/or adjusting the pH by the use of a strong acid to less than about 2.0, converting any residual chlorine to a soluble unreactive salt, adding a soluble precipitating agent, such as sodium sulfide, to the solution in a ratio to the mercury present of greater than 1:1 to about 2:1 to precipitate out the mercury as a mercury compound. The solution is then filtered to remove the precipitated mercury compound.

Process for removal of mercury from hydroxyl-ammonium nitrate solutions

An electrochemical cell is disclosed having a cell bottom or baseplate that has at least one drain hole therein which is fed by drain canals adjacent an end of the catholyte chamber such that the drain holes are gradually inclined to increase in depth laterally downwardly from the opposing sides of the cell toward the center and longitudinally downwardly from the opposing end of the cell toward the drain hole to permit removal or the addition of the liquid metal cathode from the angled electrolytic cell without requiring disassembly of the cell.

Baseplate for electrolytic cell with a liquid metal cathode

A process for decomposing a solution of a hydroxylammonium compound includes raising the pH of the solution to about 8 or higher and reacting the alkaline solution with a source of hypohalite ions. The process decomposes solutions of hydroxylammonium salts in a manner which produces benign liquid and gas effluents which can be readily disposed of or discharged.

Process for decomposing solutions of hydroxylammonium salts

An improved process for treating aqueous effluents and purge streams to selectively remove polluting elements such as iron, copper, lead and mercury therefrom is described. The procedure comprises contacting the effluent with a poly(dithiocarbamate) chelating agent whereby the polluting elements are absorbed. The resin is extracted with an acidic aqueous solution having a pH of from about 4 to about 6; and removing the resin. When this is done, the residual content of these polluting elements in the effluent is reduced to a level below EPA required levels so that the effluent can safely be discharged into the surrounding ecosystem. The poly(dithiocarbamate) resin containing the polluting elements can be disposed of, for example, by being deposited in an unsecured landfill.

Process for the purification of effluents and purge streams containing

A process for removing chlorate ions from a recirculating anolyte brine as typically used in membrane chlor-alkali cells is disclosed. In this, a portion of the circulating brine after dechlorination and resaturation with additional alkali metal chloride is diverted and treated with a stoichiometric amount of hydrochloric acid to convert substantially all of the chlorate to chlorine gas and chloride ion. When performed in this manner, substantially lower quantities of acid are required as compared to prior art processes and the problems with the generation of ClO.sub.2 are minimized.

Removal of chlorate from electrolyte cell brine

A process is disclosed for substantially reducing the dissolved halogen and hypohalite ion concentration in a recycled brine from a membrane electrolytic cell with a closed loop brine system comprising the addition of a non-sulfate generating reducing agent to the brine in a less than conventional stoichiometric molar quantity in relation to each mole of available halogen and hypohalite present in the brine after the steps of dehalogenation, precipitation and pH adjustment.

Process for removing available halogen from anolyte brine

A process is described for removing available chlorine from a depleted recirculating anolyte brine of a chlor-alkali cell. After the spent brine is removed from the cell, and typically after dechlorination, it is reacted with an amount of an organic hydroxyl moiety-containing compound soluble in said brine for a residence time sufficient to substantially reduce the residual dissolved chlorine and hypohalite ion remaining in said brine prior to resaturation and reuse in said cell. Suitable hydroxyl moiety-containing compounds include alcohols and saccharides.

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Cleveland, TN, United States of America

Sanders H Moore