US899400A - Process of preserving wood. - Google Patents

Process of preserving wood. Download PDF

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Publication number
US899400A
US899400A US42180608A US1908421806A US899400A US 899400 A US899400 A US 899400A US 42180608 A US42180608 A US 42180608A US 1908421806 A US1908421806 A US 1908421806A US 899400 A US899400 A US 899400A
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United States
Prior art keywords
wood
solution
heated
aqueous solution
chlorid
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US42180608A
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Charles Howard
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds

Definitions

  • My invention relates to an improved process-of preserving wood, and it consists-in the steps and processes herein described and claimed.
  • An object of my invention is to provide an improved process whereby an eflicient pres: ervation of the wood fibers will be obtained a mass of any size.
  • a further object of my invention is to prov1 de an improved process adapted to operate wit a minimum of expense and timefor preserving wood of any sizeand character, without danger of injuring the wood fibers or of subsequent-deterioration thereof.
  • the wood d to heat for a sufficient time to evaporate any water which ma have been absorbed bythe wood, and also the relatively volatile aqueous constituents thereof.
  • the heated wood is then treated with acool aqueous solution of magnesium sulfate having a strength of from 2% to 20%, according to the character of the wood.
  • acool aqueous solution of magnesium sulfate having a strength of from 2% to 20%, according to the character of the wood.
  • Ar -important advantage of my invention is the thorough and uniform deposition of the barium chlorid rendered ossible by evaporating the moisture from tl ie wood preliminary to treating it with a heated aqueous solution of barium chlorid.
  • the slight solubility of magnesium sulfate in a heated aqueous solution revents removal of said compound from t e wood wood, and al ment.
  • chlorid fills, the pores of the throughout the,mass of the preserving processes
  • h becomes fixed or united with the albuminous constituents of the wood and constitutes an efficient preservative; the barium chlorid being transformed to barium sulfate, which; intermixed with the magnesium wood uniformly latter.
  • My invention provides, therefore, means for obtaining a regular distribution of. the preservative agent and a uniform filllng of the ores of the wood throughout the mass of the atter by the insoluble barlum sulfate. This obviates the defects found in existingwood in which the interior portions of the wood become deteriorated and rotted by the absorption and retent on of water admitted thereto by cracks or spike holes in the-wood.
  • the herein described serving wood which consists in drying the wood treating the dried wood with a cool a ue s solution of magnesium sulfate, 'expe ling'excess moisture fromthe wood, and treating the wood with a hot aqueous solution of barium chlorid;

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Description

Specification of Letters Patent.
Patented Sept. 22, 1908.
Application filed march 18, 1908. Serial No. 421,806.
1 To all whom it may concern:
. solution. The woodis uniformly throughout 'is subjects Be it known that I, CHARLES HOWARD, a citizen of the United States, residing at New York, in the county of New York and State ofNew York, have invented certain new and useful Improvements in Processes of Preserving Wood, of which the following is a specification.
My invention relates to an improved process-of preserving wood, and it consists-in the steps and processes herein described and claimed. An object of my invention is to provide an improved process whereby an eflicient pres: ervation of the wood fibers will be obtained a mass of any size. A further object of my invention is to prov1 de an improved process adapted to operate wit a minimum of expense and timefor preserving wood of any sizeand character, without danger of injuring the wood fibers or of subsequent-deterioration thereof.
n the operationbf my invention, the wood d to heat for a sufficient time to evaporate any water which ma have been absorbed bythe wood, and also the relatively volatile aqueous constituents thereof. The heated wood is then treated with acool aqueous solution of magnesium sulfate having a strength of from 2% to 20%, according to the character of the wood. During this ste the a ueous vapor entangled among t e wood bers as a result of the previous heating will be condensed. by the cool solution; thereby producing a partial vacuum in the interstices of the wood and causing a rapid and thorough permeation of the wood by the then subjected to heat for expelling the excess moisture, and treated wit a heated aqueous solution of barium chlorid having a strength offrom 1 The solution is then drawn oif, and the aqueous portion of the warm solution then evaporated.
' Ar -important advantage of my invention is the thorough and uniform deposition of the barium chlorid rendered ossible by evaporating the moisture from tl ie wood preliminary to treating it with a heated aqueous solution of barium chlorid. In carrying out these steps, the slight solubility of magnesium sulfate in a heated aqueous solution revents removal of said compound from t e wood wood, and al ment.
chlorid, fills, the pores of the throughout the,mass of the preserving processes,
- fibers during'treatment with the heated solution of barium chlorid. All danger of so removing the magnesium sulfate, or of causing an irre lar distribution thereof through the heated barium wood, y the action of'the thereby insurchlorid solution is obviated; ing a uniformity of condition so preventing deterioration of the excess amount of barium chlorid solution which is necessarily employed in the treat- By my improved process, the magnesium sulfate 1s transforme I to magnesium chlorid,
h becomes fixed or united with the albuminous constituents of the wood and constitutes an efficient preservative; the barium chlorid being transformed to barium sulfate, which; intermixed with the magnesium wood uniformly latter. My invention provides, therefore, means for obtaining a regular distribution of. the preservative agent and a uniform filllng of the ores of the wood throughout the mass of the atter by the insoluble barlum sulfate. This obviates the defects found in existingwood in which the interior portions of the wood become deteriorated and rotted by the absorption and retent on of water admitted thereto by cracks or spike holes in the-wood.
I have described a preferred and satisfactory method of carrying out 111 invention, but obviously changes could e made within the spirit and scope of the invention.
Having thus described my I claim as. new and desire to secure by Letters-Patent is:
1. The herein described serving wood, which consists in drying the wood treating the dried wood with a cool a ue s solution of magnesium sulfate, 'expe ling'excess moisture fromthe wood, and treating the wood with a hot aqueous solution of barium chlorid;
2. The herein described process of preserving wood, which consists in subjecting the wood. to heat, treating the heated woo with 8..0001 aqueous solution of magnesium sulfate, heating the wood to expel excess moisture, and treating the heated wood with ahot aqueous solution of barium chlorid.
3 Theherein described process of prethroughout the invention, wh'at process of pre- I serving Wood, which consists in subjecting in testimony whereof I affix my signature the wood to heat, treating the heatecl wood 1n presence of two witnesses.
with a cool aqueous solution containing below 20% of magnesium sulfate, heating the CHARLES HOWARD 5 Wood to expel excess moisture, and treating Witnesses:
the heated wood with a hot aqueous solution G. AYRES,-
containing below 6 7; of barium chlorid. H. G. ROBINETTE.
US42180608A 1908-03-18 1908-03-18 Process of preserving wood. Expired - Lifetime US899400A (en)

Priority Applications (1)

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US42180608A US899400A (en) 1908-03-18 1908-03-18 Process of preserving wood.

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US42180608A US899400A (en) 1908-03-18 1908-03-18 Process of preserving wood.

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