Process for treating wood products

Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor

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34 138, 34 165, F26B 700

Patent

active

046709924

ABSTRACT:
The invention relates to an improved process for drying and preserving wood products. The improved process comprises the steps of first drying the wood products by submerging them in a naphthalene poor, coal tar based heat transfer medium under conditions of elevated temperature and reduced pressure. The dried wood products then are impregnated with a naphthalene rich, coal tar based wood preservative agent by submerging said dried wood products in said agent under conditions of both elevated temperature and pressure.

REFERENCES:
patent: 1838291 (1931-12-01), Arnold
patent: 2216775 (1940-10-01), Helson
patent: 2860070 (1958-11-01), McDonald
patent: 3995077 (1976-11-01), Hager
patent: 4313976 (1982-02-01), Leach
patent: 4599192 (1986-07-01), Rose
patent: 4602011 (1986-07-01), West et al.

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