Wood treatment with ammoniacal liquor and carbon dioxide

Details Wood treatment with ammoniacal liquor and carbon dioxide Wood treatment with ammoniacal liquor and carbon dioxide

1975-05-01

1977-02-15

Lusignan, Michael R.

Coating processes

Vacuum utilized prior to or during coating

Organic base

21 7, 427333, 427343, B05D 300

Patent

active

040083420

ABSTRACT:
A method of preventing the deposition of preservative solids onto the surface of the material being treated from an ammoniacal treating liquor of the type wherein deposition of the treating chemical within the wood requires evaporation of the ammonia from the solution. After the impregnation treatment the wood is contacted with an atmosphere containing carbon dioxide in an amount and for a time sufficient for the carbon dioxide to combine with a significant amount of the ammonium hydroxide in the treating liquor on the wood to form ammonium carbonate and/or bicarbonate and thereby inhibit the loss of ammonia from the liquor for a time sufficient for the liquor on the wood to migrate into the wood.

REFERENCES:
patent: 675826 (1901-06-01), Geisler
patent: 679739 (1901-08-01), Geisler
patent: 1680529 (1928-08-01), Richter et al.

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