Ammoniacal copper zinc arsenate concentrates and methods of preparation
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United States of America Patent
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Dec 16, 2014
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app pub date -
Oct 13, 2011
filing date -
Oct 14, 2010
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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.
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