发明申请
US20070034118A1 Dosage efficient, storage stable compositions for reducing chromium (VI) in cement
审中-公开
用于降低水泥中铬(VI)的用量有效,储存稳定的组合物
- 专利标题: Dosage efficient, storage stable compositions for reducing chromium (VI) in cement
- 专利标题(中): 用于降低水泥中铬(VI)的用量有效,储存稳定的组合物
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申请号: US11497754申请日: 2006-08-02
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公开(公告)号: US20070034118A1公开(公告)日: 2007-02-15
- 发明人: Leslie Jardine , Charlotte Porteneuve , Michael Macklin , Michael Sumner , Charles Cornman , Vijay Gupta
- 申请人: Leslie Jardine , Charlotte Porteneuve , Michael Macklin , Michael Sumner , Charles Cornman , Vijay Gupta
- 主分类号: C04B7/32
- IPC分类号: C04B7/32
摘要:
An association complex formed in a liquid environment from a metal-based chromium (VI) reducer and a non-lignosulfonate-based complexing agent is introduced into cement clinker or hydratable cement particles. In preferred embodiments, the formation of the association complex provides storage stability to the chromium reducer within the cement, such that the level of chromium (VI) after water is added to the cement remains less than 2 ppm for certain duration after mixing with water and without the necessity for further additions of chromium reducer during said duration (e.g., 26-84 or more days after addition). Compositions having the association complex are also described.
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