Wood preservation method
First Claim
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1. A method of pressure treating wood in a pressure autoclave comprising:
- a) drawing an initial vacuum to remove air from the autoclave and the wood;
b) filling the autoclave with inert gas while the autoclave is under vacuum;
c) filling the chamber with a preservative comprised of a silane and a liquid hydrocarbon solvent;
d) pressurizing the autoclave to impregnate the wood with the preservative; and
e) applying a final vacuum to the autoclave to remove excess solvent.
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Abstract
Wood is pressure treated in a pressure autoclave by drawing an initial vacuum in the autoclave to remove air from the autoclave and the wood; filling the autoclave with inert gas while the autoclave is under vacuum; filling the chamber with a preservative comprised of a silane compound, a liquid hydrocarbon solvent, and optional pesticides; pressurizing the autoclave to impregnate the wood with the preservative; draining the preservative from the autoclave; and applying a final vacuum to the autoclave to remove excess solvent from the autoclave and the wood.
7 Citations
23 Claims
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1. A method of pressure treating wood in a pressure autoclave comprising:
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a) drawing an initial vacuum to remove air from the autoclave and the wood;
b) filling the autoclave with inert gas while the autoclave is under vacuum;
c) filling the chamber with a preservative comprised of a silane and a liquid hydrocarbon solvent;
d) pressurizing the autoclave to impregnate the wood with the preservative; and
e) applying a final vacuum to the autoclave to remove excess solvent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of pressure treating wood in a pressure autoclave comprising:
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a) drawing an initial vacuum in the autoclave to remove air from the autoclave and the wood;
b) filling the autoclave with inert gas while the autoclave is under vacuum;
c) filling the chamber with a preservative comprised of a halosilane and a liquid hydrocarbon solvent selected from the group consisting of pentane, hexane, heptane, octane, and mixtures thereof;
d) pressurizing the autoclave to impregnate the wood with the preservative;
e) draining the preservative from the autoclave; and
f) applying a final vacuum to the autoclave to remove excess solvent from the autoclave and the wood. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of pressure treating wood in a pressure autoclave comprising:
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a) drawing an initial vacuum of from about 1 to about 30 inches of Hg in the autoclave to remove air from the autoclave and the wood;
b) filling the autoclave with nitrogen while the autoclave is under vacuum;
c) filling the chamber with a preservative comprised of from about 0.5 to about 10 percent by weight of silane, from about 0.1 to about 10 percent by weight of a pesticide, and a liquid hydrocarbon solvent selected from the group consisting of pentane, hexane, heptane, octane, tetrahydrofuran, furan and mixtures thereof;
d) pressurizing the autoclave to from about 0 psig to about 500 psig to impregnate the wood with the preservative;
e) draining the preservative from the autoclave; and
f) applying a final vacuum of from about 1 to about 30 inches of Hg to the autoclave to remove excess solvent form the autoclave and the wood. - View Dependent Claims (21, 22, 23)
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Specification