发明授权
- 专利标题: Preflocculation of fillers used in papermaking
- 专利标题(中): 用于造纸的填料预絮凝
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申请号: US13665963申请日: 2012-11-01
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公开(公告)号: US08778140B2公开(公告)日: 2014-07-15
- 发明人: Weiguo Cheng , Katherine M Broadus , Dorota Smoron , Shawnee M Wilson
- 申请人: Weiguo Cheng , Katherine M Broadus , Dorota Smoron , Shawnee M Wilson
- 申请人地址: US IL Naperville
- 专利权人: Nalco Company
- 当前专利权人: Nalco Company
- 当前专利权人地址: US IL Naperville
- 代理商 Benjamin E. Carlsen
- 主分类号: D21H17/68
- IPC分类号: D21H17/68 ; D21H17/69 ; D21H23/24 ; C09C3/00 ; C09C3/10 ; C09C1/02 ; C09C1/28 ; C09C1/42
摘要:
A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises use of microparticle prior to, simultaneous to, and/or after addition of a first flocculating agent to an aqueous dispersion of filler particles, followed by addition of a second flocculating agent to the dispersion and further optional shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution. In addition, a neutralizing coagulant can be added to the dispersion to partially or completely neutralize the charge of the filler before the microparticle and/or the first flocculating agent is added.
公开/授权文献
- US20130059949A1 PREFLOCCULATION OF FILLERS USED IN PAPERMAKING 公开/授权日:2013-03-07