DE286115C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 38 h. GROUP

FRITZ HASZELMANN in MUNICH.

Process for impregnating and refining wood.

Patented in the German Empire on May 28, 1908.

The subject of the invention is a method for impregnating and refining wood, which consists in the fact that the wood is heated to 80 to 100 ° and constantly agitated, aqueous solution of ferric chloride, ammonia alum and chlorine magnesium and then heated in the immobile lye lets it cool down.

The method is suitable for treating freshly felled as well as longer stored softwood, such as spruce or pine, as well as other inferior wood »Types, such as beech wood or the like, which are refined and especially beautiful and receive peculiar colorations, which, in addition to being used for the purposes of otherwise '' Common preserved wood species also available for processing in the arts and crafts do.

'This is achieved by washing the wood with an aqueous solution of about 1.5 percent ferric chloride, about 2 percent ammonia alum and about 1.5 to 2 percent chlorine magnesium is treated in the following way at an average concentration level of approximately 5 percent:

The wood freed from the bark and cleaned is, if it is freshly felled or only recently has been stored for a short time, immediately placed in a suitable boiler and the one available hot dissolved or already cooled lye supplied.

In the case of wood that has been stored for a long time and has possibly already been processed but not glued, it is advisable to to produce fresh end faces by cutting, hewing.

The level of the lye above the wood should, as practice has shown, be about V _{5 of} the boiler height.

The boiler or the like is then heated by direct or indirect heating (but never by direct steam supply) until the liquor is heated to 80 to 100 °. With these The protein present in the wood is coagulated at high temperatures; the resin and the others Juice components are chemically converted and any existing mushrooms that have already been brought from the forest are killed.

The one absorbed by the cell walls In addition to preservation, lye causes the cell walls to harden and the structure of the cells becomes a denser, more closed one. Wood treated in this way can after Drying can be given a long-lasting high-gloss polish and is therefore an application of veneers for their craft processing dispensable.

Since the lye absorption on the part of the wood, which increases with the warming, the The height of the layer above the wood continuously decreases, so there must be a corresponding inflow of lye be taken care of, which is easily made possible by a float device or by some other automatic inflow can be.

In order to bring about a uniform penetration of the lye into the wood, the Keep the lye in constant motion

that which is accomplished by supplying hot air or by mechanical devices can be.

After about 2 to 5 hours of heating, depending on the type, strength and purpose of the treatment In the case of wood, it is allowed to cool down slowly in the lye, which means that lye is sucked up further into the wood.

The wood must then be carefully dried, which is done by piling it up can be effected in free stores or in drying chambers with air admission. While the chemical bonding process takes place during the drying process, which means that such properly dried wood becomes extremely dry is resistant to leaching.

Depending on the amount of added substances, the woods are given a silver-gray, yellow or brown color, with of course the most varied nuances between these three Main colors can be taken into account.

Of course you can add to the lye

Additions can also be made if special properties of the wood to be treated are to come to the fore. For example, to achieve special color shades at irn Crafts required types of wood and u for the holding of termites, Bohrwürmern. The like., Etc. are added schoenite for lumber in the tropics, or if special emphasis is placed on Schwerentzündbarkeit, this can be achieved by the addition of potassium chloride will.

It should also be mentioned that the number of uses of the same lye is limited by the latter used a maximum of seven to ten times to achieve always beneficial effects shall be. The lye residue must then be subjected to a suitable cleaning process or existing residues after each treatment before introducing the make-up liquor removed.

The method according to the present invention is equally suitable for everyone Types of wood, but especially for coniferous or resin-rich wood, such as spruce, pine, fir etc. Especially the spruce wood becomes oak-like due to the claimed treatment Lent character, a result which, given the huge spruce population, especially in the German forests, is of the greatest magnitude is of economic importance.

Claims (2)

Patent Claims: 1. A method for impregnating and encryption _ noble of wood, consisting in m to the wood heated in a 80 to ioo ° and heated continuously moving aqueous solution of ferric chloride, Ammoniakalauu and magnesium chloride and then allowed to cool in the still liquor. 2. An alkali for carrying out the method according to claim 1, characterized in that it consists of about 1.5 percent ferric chloride, about 2 percent ammonia alum and 1.5 to 2 percent chlorine magnesium and is used in an average concentration of 5 percent.