发明授权
US4436586A Method of producing kraft pulp using an acid prehydrolysis and
pre-extraction
失效
使用酸预水解和预萃取生产牛皮纸浆的方法
- 专利标题: Method of producing kraft pulp using an acid prehydrolysis and pre-extraction
- 专利标题(中): 使用酸预水解和预萃取生产牛皮纸浆的方法
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申请号: US341627申请日: 1982-01-22
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公开(公告)号: US4436586A公开(公告)日: 1984-03-13
- 发明人: Carl L. Elmore
- 申请人: Carl L. Elmore
- 申请人地址: NY Glen Falls
- 专利权人: Kamyr, Inc.
- 当前专利权人: Kamyr, Inc.
- 当前专利权人地址: NY Glen Falls
- 主分类号: C12P7/10
- IPC分类号: C12P7/10 ; D21C1/00 ; D21C3/02 ; D21C7/00 ; D21C1/04 ; D21C1/06
摘要:
A method for produce both kraft pulp and alcohol from hardwood chips or the like. The chips are subjected to mild acid prehydrolysis following by mild caustic pre-extraction. The withdrawn hydrolysate has insufficient furfural to inhibit microorganism growth, and both the hexose and pentose sugars in the hydrolysate are fermented to ultimately produce ethanol, butanol, or the like. The chips - after caustic pre-extraction - are subjected to a sulphate cook, and wash, and the resultant pulp is kraft pulp and even has viscosity and tear strength characteristics more desirable than that of conventional kraft pulp. The pulp can be subjected to oxygen delignification, and achieve a higher K number in fewer subsequent bleaching stages than conventional kraft pulp.
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