CS253794B1 - Process for the increasing of resins content in pine trees - Google Patents

Abstract

The present invention relates to a method for increasing content resin in pine trees by incorporation 1,1'-ethylene-2,21-bipyridylia solution in any season of the year weight percent adjusted according to tree condition depending on age and other environmental impacts thus enabling the use of this m

Description

The invention relates to a method for increasing the sources of boron resin, which is a basic natural raw material used in a number of industries.

The resin is obtained by:

1. by injuring the bast and the surface of white trees (licking) and collecting the effluent,

2. extraction from the stumps of very old resin-rich trees,

3. in the production of pine wood pulp by the sulphate process, where the volatile constituents of oleoresins are condensed to turpentine and recovered from the lye saponification, saponification, concentration and acidification by resinic acids - tall oil and from it further processing (refining) rosin.

Acquisition of resin from living trees by licking is limited by the lack of suitable toll stands and the lack of manpower in forestry. In addition, licking weakens trees, which are then more susceptible to attack by bark beetles and bark beetles, wood decaying fungi, and there is an increased risk of forest fires in forests where resin extraction takes place. Extraction of the resin reduces the reserves of over-aged pine stands. The amount of tall oil obtained in the kraft pulp process is closely related to the resin content of the wood. Pine wood normally contains 1.5-5.0% resin.

Forestry researchers in the USSR (Komisarov et al., Lesochim, Promyschl. 1968) and the USA (Roberts et al., For. Serv. Res. Nota SE-191, 1973) noted that 1,1'-dimethyl-4, 4'-bipyridylium stimulates living wood cells to form resin. In our own experiments we have found that 1,1'-ethylene-2,2'-bipyridylium has an even stronger stimulating effect on resin formation in living pine trees.

The annual need for rosin in the CSSR in various industries (rubber industry, production of paints and varnishes, paper industry, food, pharmaceutical, etc.) is about 20 000 tons. Only a minor part of the resinous substances is obtained by extraction of natural resin by means of pitching. Extraction of resin from wood and obtaining of resinous substances from waste liquors of sulphate pulp mills is not carried out in our country because of low efficiency of these processes, where the basic disadvantage for their introduction is low content of resin in pine wood (1.5 to 5.0 weight percent).

Increasing the resin content in wood is achieved according to MS. AO 195 911 the invention according to which the period of active growth of trees is introduced into the timber of the conductive elements from 2.0 to 8.0 weight percent solution of 1,1-ethylene-2,2 -bipyridylia ^1.

Other research has found that a solution of 1,1-ethylene-2,2 -bipyridylia ¹ enclosed in the wood of pine trees at any time of year. Accordingly, it is an object of the present invention to provide a method of increasing the resin content of pine trees by incorporating a solution of 1,1'-ethylene-2,2'-bipyridylia which is characterized in that a solution is introduced into the conductive wood elements during periods of active tree growth. , 01 to 12.0% by weight and in the period outside active tree growth in an amount of from 2.0 to 12.0% by weight.

Throughout 1985, the above chemical was incorporated into the conductive wood elements at the bottom of the logs:

1. by injecting 5-10 cm deep into the wood (dp 1/3 of the trunk diameter at the application site), or

(2) by coating or spraying jamming or indentations penetrating the last 2-3 annual rings; or

3. by coating or spraying exposed strips of wood 3-5 cm wide with aqueous solutions of the active substance; or

4. by coating or spraying the bark of the strains with a solution of the active substance in suitable bark-penetrating solvents (light oils).

Extraction of resin from the chemically treated and control untreated trees showed that the resin content in the chemically treated trees was 8 to 26.4 percent by weight of the total mass, whereas in the control untreated trees, n < 100 percent.

As the active substance distributes through the transpiration stream from the application site to the higher parts of the tree (up to 8 m high) and also penetrates the pulp rays inside the trunk, resin formation in almost all living wood is increased. The resin is deposited mostly in sapwood, but partly also in wood that has already matured.

Stimulation of pine trees to increase resin formation by the chemical can be carried out in trees of different ages and thicknesses, but is most useful in fiber-producing trees.

By increasing the resin content in pine wood to 10-26 weight percent, the preconditions for its efficient extraction in special facilities as well as for the recovery of resin components from kraft pulp and paper mills, where the resin content increases to 3-5 times, are created. By consistently enriching the wood for the production of pulp with the resin as described above, and recovering the resinous substances from the waste liquors, it is possible to obtain from own sources amounts of rosin, fully covering its need in the national economy. At the same time, pollution of watercourses would be reduced and thus the requirements of maintaining the cleanliness of the environment would be more respected.

Claims (1)

Method for increasing the resin content in pine trees by introducing a solution of 1,1'-ethylene-2,2'-bipyridylia, characterized in that a solution of 1,1'-ethylene-2,2'-bipyridylia during the active period is introduced into the conductive wood elements. tree growth in an amount of from 8.01 to 12.0% by weight and in the period outside active tree growth in an amount of from 2.0 to 12.0% by weight