FIELD: chemistry.
SUBSTANCE: present invention concerns chemical processing of wood, particularly fir bark, with obtaining resinous wax, tanning substances and activated carbon. A method of fir bark processing is described involving milling fir bark, extraction by non-polar solvent to obtain resinous wax, processing bark remainders with water-alcohol mix containing 1% mass units of sodium hydroxide to obtain tanning extract, and further processing solid bark residues to activated carbon.
EFFECT: almost complete utilisation of fir bark, expanded range of products made thereof at higher tanning extract yield.
2 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF FIR BARK PROCESSING | 1998 |
|
RU2142489C1 |
| METHOD OF BIRCH BARK CONVERSION | 2008 |
|
RU2352349C1 |
| METHOD FOR COMPLEX PROCESSING OF FIR BARK | 2023 |
|
RU2821519C1 |
| METHOD OF LARCH BARK TANNIC EXTRACT PREPARING | 1998 |
|
RU2124562C1 |
| METHOD FOR COMPREHENSIVE PROCESSING OF PINE BARK | 2021 |
|
RU2783872C1 |
| METHOD OF BIRCH BARK CONVERSION | 2008 |
|
RU2352350C1 |
| METHOD OF PROCESSING SILVER FIR BARK | 1998 |
|
RU2137821C1 |
| METHOD OF THE LARCH BARK COMPLEX PROCESSING | 2017 |
|
RU2657427C1 |
| METHOD FOR PROCESSING OF CONIFER BARK | 2008 |
|
RU2400357C2 |
| METHOD OF SPRUCE BARK PROCESSING | 2007 |
|
RU2332438C1 |
