| 摘要 |
FIELD: chemistry, wood processing industry. SUBSTANCE: method involves sustaining sewage and separation in into resin and supernatant fraction. Acid granulated clay sorbent is added into said supernatant fraction, liquid fraction being separated. Then distillation is carried out at pH 9.0-10.0 within definite temperature range. Thus methanol fraction which contains methanol (its quantity being not less 95 %), aqueous condensate with pH 8.0-9.5, urotropin (its quantity being not more 80 mg/l) and formaldehyde (its quantity being 0.5 mg/l) is prepared. EFFECT: improves efficiency of the method. |
