发明名称 |
PROCESSO PARA A PRODUÇÃO DE PRODUTO CELULÓSICO |
摘要 |
The present invention relates to a process for the production of a cellulosic product which comprises providing an aqueous thick suspension containing cellulosic fibers having a fiber concentration of at least about 2% by weight; adding to the thick suspension an aluminum compound, alkaline earth metal salt and acid; diluting the obtained thick suspension to form a thin suspension; adding to the thin suspension one or more drainage and retention aids; and dewatering the obtained thin suspension. The invention further relates to a process for the production of a cellulosic product which comprises providing an aqueous thick suspension containing cellulosic fibers having a fiber concentration of at least about 2% by weight and an alkaline earth metal ion concentration of at least about 100 mg/l; adding to the thick suspension an aluminum compound and optionally an acid to obtain a pH of from about 4 to about 5.5; diluting the obtained thick suspension to form a thin suspension; adding to the thin suspension one or more drainage and retention aids; and dewatering the obtained thin suspension. The invention also relates to an aqueous composition comprising a mixture of an aluminum compound, alkaline earth metal salt and acid and the use of the composition. |
申请公布号 |
BRPI0720496(A2) |
申请公布日期 |
2014.02.04 |
申请号 |
BR2007PI20496 |
申请日期 |
2007.12.18 |
申请人 |
AKZO NOBEL N.V. |
发明人 |
PATRICK SIMONSON;MAREK TOKARZ;KATARINA GUTKE |
分类号 |
D21H17/65;D21H17/66;D21H17/67;D21H21/10 |
主分类号 |
D21H17/65 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|