Olin Corporation

Manfred G Noack

Steven A Manke

Philip A Vella

A process for the production of an aqueous solution containing chlorine dioxide and chlorine, which comprises:

Process for producing an aqueous solution containing chlorine dioxide

A method has been devised for removing hexavalent chromium from concentrated aqueous alkali metal chlorate solutions by reacting the solution with a hydrazine compound and separating trivalent chromium compound from the solution. Alkali metal hypohalites may be simultaneously removed from the chlorate solution by reaction with excess hydrazine compound.

Selective chromate removal from a chlorate solution

Corrosion inhibiting compositions are described which contain a hydrazine compound, an organometallic complex and preferably a quinone compound. The organometallic complex is the reaction product of a cobaltous or manganous hydroxide and one or more aromatic ligands containing at least two hydroxy functional groups, or at least one amino and one hydroxy group, in the ortho position with respect to one another. The quinone compound is preferably added to these compositions in order to render the compositions compatible with chelating phosphonate scale control agents. The use of these compositions as oxygen scavengers in corrosive environments is also described.

Catalyzed hydrazine compositions and methods of their use

Corrosion inhibiting compositions are described which contain a hydrazine compound, an organometallic complex, and, preferably, a quinone compound. The organometallic complex is the reaction product of a cobaltous or manganous hydroxide and one or more organic ligands selected from the group consisting of unsubstituted and substituted amino derivatives of carboxylic acids and salts thereof. The quinone compound is preferably added to these compositions in order to render them compatible with chelating phosphonate scale control agents. The use of these compositions as oxygen scavengers in corrosive environments is also described.

Corrosion inhibiting compositions are described which contain a hydrazine compound, an organometallic complex and a quinone compound. The organometallic complex is the reaction product of a cobaltous, manganous, or cupric inorganic salt and one or more aromatic ligands containing at least two hydroxy or two amino functional groups, or at least one amino and one hydroxy group, in the ortho position with respect to one another. The quinone compound is one which renders the composition compatible with chelating phosphonate scale control agents. The use of these compositions as oxygen scavengers in corrosive environments is also described.

Catalyzed hydrazine compound corrosion inhibiting composition containing

Corrosion inhibiting compositions are described which contain a hydrazine compound, an organometallic complex and a quinone compound. The organometallic complex is the reaction product of a cobaltous, manganous, or cupric inorganic salt and one or more ligands comprising amino derivatives of carboxylic acids or salts. The quinone compound is one which renders the composition compatible with chelating phosphonate scale control agents. The use of these compositions as oxygen scavengers in corrosive environments is also described.

Corrosion inhibiting compositions are described which contain a hydrazine compound and an organometallic complex. The organometallic complex is the reaction product of a cobaltous, manganous, or cupric inorganic salt and one or more ligands comprising amino derivatives of carboxylic acids or salts. The use of these compositions as oxygen scavengers in corrosive environments is also described.

Corrosion inhibiting compositions are described which contain a hydrazine compound and an organometallic complex. The organometallic complex is the reaction product of a cobaltous, manganous, or cupric inorganic salt and one or more ortho aromatic ligands containing at least two hydroxy or two amino functional groups or at least one amino and one hydroxy group. The use of these compositions as oxygen scavengers in corrosive environments is also described.

Growing community of inventors

Northford, CT, United States of America

Manfred G Noack