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| Effects of Heating Treatment Condition of Pulping Black Liquor of Birch on Methanol Formation |
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| DOI：10.11980/j.issn.0254-508X.2015.02.004 |
| Key Words:sulfate process soda-AQ black liquor methanol formation |
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| Abstract:The influences of heating temperature, time, gas environment, gas-liquid phase ratio, concentration of sodium hydroxide and sodium sulfide on methanol formation from black liquor of birch alkaline cooking were investigated. The results showed that methanol formation constantly increased with extension of reaction time, rise of temperature and gas-liquid ratio. Especially in high gas liquid ratio, at high temperature and under aerobic conditions, methanol formation increased sharply, but increased slightly at the low temperature or nitrogen environment. Methanol concentration in black liquor increased to 124.8% when the black liquor was heated up to 120℃ in the presence of oxygen and the gas liquid ratio was 3.3. The influence of NaOH and Na2S concentration on methanol formation from birch alkaline cooking black liquor was not significant. |
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