United Laboratories International, LLC

Halliburton Company

Zymeflow, Inc.

Kenneth J Snyder

Jack G Frost

Michael B Lawson

Howard D Johnson

A method for treating hydrogen sulfide in a solution includes providing the solution containing hydrogen sulfide. The method also includes adding sodium nitrite to the solution in an amount suitable to react with the hydrogen sulfide and treat the hydrogen sulfide.

Sodium nitrite oxidation of hydrogen sulfide

A process for removing at least a portion of any iron, copper, nickel and chromium ions that are chelated by a alkylenepolyamine polyacetic acid or salt in an aqueous liquid waste. The process comprises the steps of (a) adjusting the pH of the liquid to above about 10; (b) adding sufficient sodium sulfide to react with at least a portion of the copper ions; (c) separating precipitated iron and copper compounds; (d) adding nitric acid to adjust the pH to the range of about 6 to 8; (e) adding sufficient sodium nitrite to the liquid to react with at least a portion of the nickel and chromium present; (f) heating the liquid to above about 575.degree. F. for at least about 15 minutes to facilitate precipitation of nickel and chromium; and (g) separating precipitated solids to leave a non-hazardous filtrate.

Method for treating chelant solutions to remove metals in solution

Methods for removing deposits from surfaces in wood pulp processing apparatus are provided wherein the deposits are contacted with compositions comprised of aqueous solutions of alkali metal hypochlorites.

Removing deposits from surfaces in wood pulp processing apparatus

Asphaltic material is dissolved by contact with a solvent composition for a time sufficient to dissolve the asphaltic material wherein the solvent composition is comprised of a liquid heavy aromatic solvent having a high flash point and a fused heterocyclic ring compound or compounds soluble in the heavy aromatic solvent. In another embodiment, the asphaltic material is the binder material of a degraded organic residue whereby dissolution of the asphaltic material enables the convenient disintegration of the degraded organic residue. In still another embodiment, the solvent composition is the oil phase of an oil-water emulsion.

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Addington, OK, United States of America

Kenneth J Snyder