发明名称 |
FREMGANGSMAATE TIL ATSKILLELSE AV NATRIUMVANILLAT FRA LIGNIN OG ALKALI I ALKALISKE VANDIGE LOESNINGER |
摘要 |
This invention relates to a method for the separation of low molecular-weight aromatic compounds, e.g. vanillin and dehydrodivanillin, from lignin, alkali, and from each other, in alkaline aqueous solutions. According to the method, the separation is effected by means of a cationic ion-exchange resin in its sodium salt form, e.g. of a strong sulphonic acid type or weak carbonic acid type, from which the substances adsorbed are removed by elution. The resin may be crosslinked to the extent of 2-16% divinylbenzene. The substances adsorbed onto the ion-exchange resin are appropriately eluted by either water alone, or by application of an aqueous sodium-salt solution (e.g. Na2CO3) followed by water. |
申请公布号 |
NO152923(B) |
申请公布日期 |
1985.09.09 |
申请号 |
NO19810003215 |
申请日期 |
1981.09.22 |
申请人 |
FORSS, KAJ GUSTAF,;TALKA, ESKO TAPIO,;FREMER, KAJ-ERIK, |
发明人 |
FORSS, KAJ GUSTAF,;TALKA, ESKO TAPIO,;FREMER, KAJ-ERIK, |
分类号 |
B01J47/00;C07C45/79;C07C47/058 |
主分类号 |
B01J47/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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