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US 11,919,191 B2Granted
Methods for enhancing the preservation of cellulosic materials and cellulosic materials prepared thereby
AssigneeAmerican Chemet Corporation
InventorDaniel Brimhall
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Abstract
Methods for treating cellulosic materials comprising introducing a liquid treating composition into the cellulosic material, the treating composition comprising a solution prepared from at least: (i) one or more of a copper amine complex or copper ammine complex, such as copper tetraamine carbonate, (ii) one or more of ammonia or a water-soluble amine and (iii) water; and exposing the cellulosic material provided thereby to carbon dioxide and/or carbonic acid to provide treated cellulosic material, and treated cellulosic materials prepared thereby.
Claims17
Treated refractory softwood comprising
- refractory softwood, and
- a copper-containing compound formed in situ within the refractory softwood by exposing an aqueous solution of a copper ammine complex to carbon dioxide, carbonic acid, or a mixture thereof,
- wherein the copper-containing compound penetrates at least about 80% of the treated refractory softwood as determined using AWPA Standard A72, and
- wherein the leaching of sectioned treated refractory softwood after 14 days as determined using AWPA Standard E11 is less than 25% of the total copper present in the sectioned treated refractory softwood.
1 more element
Dependencies are inferred from the claim text.