发明名称 |
FOERFARANDE FOER DEFIBRERING AV LIGNOCELLULOSAMATERIAL OCH AOTERVINNING AV BIPRODUKTER |
摘要 |
<p>Filtrates from the bleaching and delignification of the pulp are recycled for reuse in pulping, separation, and recovery of lignin (66) and other by-products which results in significant energy savings and mitigation if not the elimination of pollution typically associated with bleaching. This invention also relates to products derived from the process and apparatus for carrying out the process. Lignins of various molecular weights and by-products of the pulping process are also recovered (66). The lignins are precipitated in high yields and at a high rate from a black liquor (40) produced by pulping wood at high temperature and pressures with an aqueous lower aliphatic alcohol solvent. As a by-product of this process a purified furfural product is recovered (71). This furfural may be recycled for use in the recovery of the low molecular weight lignin of this process.</p> |
申请公布号 |
FI933418(A0) |
申请公布日期 |
1993.07.30 |
申请号 |
FI19930003418 |
申请日期 |
1993.07.30 |
申请人 |
ALCELL TECHNOLOGIES INC. |
发明人 |
LORA, JAIRO H.;KATZEN, RAHPAEL;CRONLUND, MALCOLM;WU, CHIH FAE;COPAL, GOYAL C.;WINNER, STEPHEN R.;LEBLANC, RON |
分类号 |
C07D307/48;C07D307/50;C08H7/00;D21C;D21C3/20;D21C9/10;D21C11/00 |
主分类号 |
C07D307/48 |
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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