Invention Grant
US08052788B2 Method of producing silica sols with controllable broad size distribution and minimum particle size
有权
生产具有可控的大尺寸分布和最小粒径的硅溶胶的方法
- Patent Title: Method of producing silica sols with controllable broad size distribution and minimum particle size
- Patent Title (中): 生产具有可控的大尺寸分布和最小粒径的硅溶胶的方法
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Application No.: US12237047Application Date: 2008-09-24
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Publication No.: US08052788B2Publication Date: 2011-11-08
- Inventor: Dennis L. MacDonald
- Applicant: Dennis L. MacDonald
- Applicant Address: US IL Naperville
- Assignee: Nalco Company
- Current Assignee: Nalco Company
- Current Assignee Address: US IL Naperville
- Agent Edward O. Yonter; Michael B. Martin
- Main IPC: C04B14/04
- IPC: C04B14/04 ; B01J21/00 ; C01B33/12 ; C01B33/141 ; B24D3/02 ; C09C1/68 ; C09K3/14 ; B28B7/38
Abstract:
Colloidal silica having a controllable broad particle size distribution and a controllable minimum particle size is disclosed and claimed. Particles below a predetermined size are excluded from the product colloidal silica of the invention. A method for continuously producing the desired colloidal composition is disclosed comprising the steps of providing preformed silica particles having a surface area which controls the particle size of the colloidal silica product, adding a feed silica comprising an alkaline solution and silicate at a feed rate which is less than a nucleation rate.
Public/Granted literature
- US20090018219A1 METHOD OF PRODUCING SILICA SOLS WITH CONTROLLABLE BROAD SIZE DISTRIBUTION AND MINIMUM PARTICLE SIZE Public/Granted day:2009-01-15
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