Method of stabilizing sodium percarbonate

专利摘要:
Sodium percarbonate is stabilized with highly dispersed silica. The sodium percarbonate containing 1 to 10 weight % of water is mixed with the silica and subsequently dried. The highly dispersed silica has an average particle size of 2-100 microns, preferably 7-20 microns. The product is sodium percarbonate particles encased by a sodium silicate jacket.
公开号:SU772479A3
申请号:SU782632851
申请日:1978-06-27
公开日:1980-10-15
发明作者:Клебе Ханс；Книппшильд Герд
申请人:Дегусса (Фирма)；
IPC主号:

专利说明:

highly dispersed silicic acid (average primary particle size 12 nm), the Product is dried at 58 ° C for 30 min in a drying cabinet.
The resulting product has the following analysis results: active oxygen 13.26, StOg 0.99, COg 26.53, FejO 0.003%, bulk density 1.030 kg / l stored at 30 ° C, relative humidity 92.9% after 4 days of loss of active oxygen make up 1.6%, after 7 days - 6.8% and 10 days8, 4%.
When using sodium percarbonate with a water content of less than 1%, the loss of active oxygen within 10 days at 30 ° C and a relative humidity of 92.9% reaches 23.8%; with a water content of more than 10%, the loss of active oxygen decreases slightly, there is a slight clumping of the product. When the particle size of silicic acid is more than 100 nm, the loss of active oxygen increases by more than 20%,
at a particle size below 2 nm, no loss of active oxygen is observed, the production of silicic acid with a particle size below 2 nm is difficult.

权利要求:
Claims (1)
[1]
Invention Formula
The method of stabilizing sodium percarbonate by mixing sodium percarbonate with a compound containing krenium, followed by drying the product, is distinguished by the fact that, in order to reduce the loss of active oxygen in the product during its storage, silicon acid with a size particles of 2-100 nm and sodium percarbonate with a water content of 1-10 wt.% is fed to the mixture.
Sources of information taken into account during the examination
1, US Patent No. 3773678, cl. 252-186, pub. 1973.

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引用文献:

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US3951838A|1973-10-10|1976-04-20|E. I. Du Pont De Nemours And Company|Silica sol stabilizers for improving the stability of sodium percarbonate in solid bleaches and detergents|CA1113397A|1977-11-09|1981-12-01|Peter F.R. Lunn|Aqueous persulphate and percarbonate composition for bleaching hair|

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US4416606A|1980-10-22|1983-11-22|Mitsubishi Gas Chemical Company, Inc.|Apparatus for granulating sodium percarbonate|

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US4410444A|1981-03-24|1983-10-18|Degussa Aktiengesellschaft|Process for the production of a stable per salt|

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US5332518A|1992-04-23|1994-07-26|Kao Corporation|Stable slurry-coated sodium percarbonate, process for producing the same and bleach detergent composition containing the same|

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US5780410A|1993-07-14|1998-07-14|The Procter & Gamble Company|Detergent compositions containing percarbonate and making processes thereof|

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CA2167158C|1993-07-14|1999-11-02|Gerard Marcel Baillely|Detergent compositions containing percarbonate and making processes thereof|

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US20050031530A1|2003-08-07|2005-02-10|Martin Perry L.|Method and apparatus for producing a peroxyacid solution|

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US20060014872A1|2004-07-16|2006-01-19|Martin Roy W|Protective composition that allows in-situ generation of permeation channels therein|

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法律状态:

优先权:

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申请号 | 申请日 | 专利标题

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DE2748783A|DE2748783C3|1977-10-31|1977-10-31|Method of stabilizing sodium percarbonate|

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