SU500058A1 - The method of modification of plant materials - Google Patents

Description

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The invention relates to the processing of plant materials from XHNaiHecKoft and can be used in the manufacture of our various 1stystics or in the production of animal feed. nutritional value for livestock. five

Known methods of modifying wood and other plant materials by impregnating them with a water-ammonia solution.

The purpose of the invention is to increase the productivity and improve the quality of drinking. ; .io

This is achieved by impregnation; carried out In the vapor phase of a water-ammonia i solution heated above the temperature j of the material being processed.

The method is carried out as follows. 15 ZOM:

Entrance In the chamber with the processed material, the temperature of which is lower than the vapor temperature of the aqueous ammonia solution, the vapors condense on the surface of the material, raising the temperature of the latter. the temperature of the material reaches the vapor temperature, the condensation stops. After this, a new equilibrium with an increased

by keeping ammonia both in solution, i.e., material, and in the vapor phase. Absorption: ammonia material occurs very quickly, since the condensation of equilibrium vapors occurs almost instantaneously, and the pressure and low temperature of the material contribute to the intense penetration of ammonia into the material. This is also due to the increased temperature at the release of vapor after the completion of the modification of the material; most of its vlti is excreted. ;

The amount of absorption by the material afi miak is controlled by the magnitude of the concentration and temperature of the aqueous ammonia solution and the temperature difference between the material and the vapor phase.

Example. Treated birch and pine OP11PKI. Into the 3ti treatment chamber, the nuts are loaded with a temperature of 60 C) and a humidity of 12% and are treated with water-vapor pairs of a 21% ammonium water solution with a temperature of i40 C for 1.0. min TeMn jaTypa mate Iyala in re reaches 130 ° C. After the material is processed, the vapor phase from the chamber is allowed into the regenerator to obtain a ammonia-water solution, and the material is discharged. Plates with an average density of 1050 kg / m and a thickness of 4 microns, which after their 5-hour thermal breakdown at 180 ° C have the following properties, are made from the obtained material using an extrusion method.

Mechanical properties: 1

Strength at static I31y6e |

425 kgf / cm birch slabs

lok; . . 2-

ZO5 kgf / cm plates of pine-bipokL

R

Water intake in 24 hours j

 birch wood chips; 10-15% of pine sawdust plates.

Thicker in 24 hours, from birch sawdust plates; Slabs of pine sawdust.

Thus, the material obtained from OPILOK, processed according to the proposed robe, has sufficient mechanical strength and reduced strength. Water absorption by swelling.

Phromu inventions; The method of modifying plant materials by means of water-ammonia; The nude is carried out in the vapor phase of an aqueous ammonia solution, heated above the temperature of the material being processed.