发明授权
- 专利标题: Process for the production of a pourable phosphate-free foam-inhibiting preparation
- 专利标题(中): 生产可倾倒磷酸盐泡沫抑制剂的方法
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申请号: US920379申请日: 1992-08-17
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公开(公告)号: US5318718A公开(公告)日: 1994-06-07
- 发明人: Wolfgang Seiter , Herbert Reuter , Edmund Schmadel
- 申请人: Wolfgang Seiter , Herbert Reuter , Edmund Schmadel
- 申请人地址: DEX Duesseldorf
- 专利权人: Henkel Kommanditgesellschaft auf Aktien
- 当前专利权人: Henkel Kommanditgesellschaft auf Aktien
- 当前专利权人地址: DEX Duesseldorf
- 优先权: DEX4004687 19900215; DEX4019753 19900621
- 主分类号: C11D3/00
- IPC分类号: C11D3/00 ; C11D3/22 ; C11D3/37 ; B01D19/04 ; C11D7/60 ; C11D11/00
摘要:
A process for the production of pourable foam inhibitor granules comprising forming an aqueous solution of a mixture of an alkali metal carboxymethyl cellulose and a nonionic cellulose ether and maintaining the aqueous solution at slightly elevated temperature until the viscosity is at least 60% of the viscosity obtained by complete swelling of the solution, adding a water insoluble foam inhibitor and a phosphate-free mixture of at least two of an alkali metal silicate, an alkali metal carbonate and an alkali metal sulfate into the aqueous mixture which is then spray-dried to form the pourable foam inhibitor granules.The invention also relates to the pourable foam inhibitor granules produced by the above process.
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