Ammoniacal copper zinc arsenate concentrates and methods of preparation
AssigneeArch Wood Protection, Inc.
InventorsJayesh P. Patel, Gloriana Kuswanto
Life of this patent
Estimating the term…
Abstract
Disclosed herein is a composition concentrate that is suitable for treating wood upon dilution with water in a weight ratio of concentrate to water of between 1:10 and 1:100. The concentrate contains copper ammonium cations, zinc ammonium cations, arsenate and/or hydrogen arsenate anions; carbonate and/or bicarbonate anions, ammonia and water, wherein the total amount of copper and zinc is from 17% to about 22% by weight based on the total volume of the concentrate. Also disclosed is a process for producing ammoniacal copper zinc arsenate concentrate.
Claims19
An ammoniacal copper zinc arsenate (ACZA) concentrate that is suitable for treating wood upon dilution with water in a weight ratio of concentrate to water of between 1:10 and 1:100, said concentrate comprising copper in the form of copper ammonium cations, zinc in the form of zinc ammonium cations, arsenic in the form of arsenate and/or hydrogen arsenate anions, carbonate and/or bicarbonate anions, ammonia and water, wherein the total amount of copper and zinc is from 17.0% to about 22% by weight based on the total volume of the concentrate.
A process for producing a composition concentrate comprising reacting a reaction mixture containing copper (II) oxide, zinc oxide, arsenic acid, ammonia, and ammonium bicarbonate or carbon dioxide in order to provide the composition concentrate, wherein the total amount of copper and zinc in the composition concentrate is from 17.0% to about 22% by weight based on the total volume of the concentrate.
An ammoniacal copper zinc arsenate (ACZA) composition concentrate produced by a process which comprises:
- reacting a mixture containing copper (II) oxide, zinc oxide, arsenic acid, ammonia and ammonium bicarbonate or carbon dioxide in order to provide the composition concentrate, wherein the total amount of copper and zinc is from 17.0% to about 22% by weight based on the total volume of the concentrate.
Dependencies are inferred from the claim text.