FIELD: wood working industry.
SUBSTANCE: invention relates to method for processing of conifer bark. Method for processing of conifer bark includes bark grinding, serial extraction with hydrocarbon dissolvent and water, concentration of extract and extraction of target fractions of lipids and polyphenol. After extraction of lipids and polyphenols, remaining bark is exposed to hydrolysis-extraction with acidified water at the temperature of 70-75°C, hydraulic modile 1:(2.0-2.5), for 6-7 hours, with further concentration of extract by method of ultrafiltration at the temperature of 40-47.5°C and pressure of 0.4-0.45 MPa, depositing fraction of pectine substances by aliphatic alcohol, separation of pectines deposit by centrifugation and spray-drying at the temperature of 40-40.9°C and pressure of 0.3-0.38 MPa. Remained extracted bark is used to produce bark compost fertilisers.
EFFECT: suggested method makes it possible to extract biologically active substances from bark to the maximum.
2 tbl, 1 ex
| Title | Year | Author | Number |
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| PROCESS OF FULLY REUSING WOOD BARKING WASTES | 2004 |
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| METHOD OF OBTAINING PECTINE FROM LARCH BARK HAVING MEMBRANE STABILISING ACTIVITY AND CAPACITY TO REDUCE SILVER IONS OF SILVER NANOBIOCOMPOSITE STABILISED WITH PECTINE | 2009 |
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RU2403263C1 |
