Composition and method for maintaining a constant concentration

Details Composition and method for maintaining a constant concentration Composition and method for maintaining a constant concentration

1974-10-15

1976-04-06

Lovering, Richard D.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

21 7, 252397, C09K 1508, B27K 300, C09K 1500

Patent

active

039488020

ABSTRACT:
In a wood treating process wherein wood is impregnated with a halogenated solvent solution containing a wood preservative and an antiblooming additive and excess solvent is vaporized from the impregnated wood and condensed for return to the used impregnation solution, the depleted solution is restored to its original composition for recycle to the process by addition of a concentrate of the preservative and antiblooming additive in the solvent. Preferred components of the treating solution and the concentrate are pentachlorophenol, a glycol or glycol derivative, and a relatively low boiling chlorinated solvent such as methylene chloride.

REFERENCES:
patent: 3039843 (1962-06-01), Chamberlain
patent: 3351485 (1967-11-01), Langner
patent: 3541171 (1970-11-01), Starnes
patent: 3634289 (1972-11-01), Liddell
patent: 3685959 (1972-09-01), Dunn
patent: 3702784 (1972-11-01), Farquhar
patent: 3756960 (1973-09-01), Junghahnel
patent: 3785770 (1974-01-01), Hudson

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