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公开(公告)号：SK26796A3
公开(公告)日：1996-07-03
申请号：SK26796
申请日：1994-04-23
Applicant: DEGUSSA
Inventor： BEWERSDORF MARTIN , KLASEN CLASS-JURGEN , LOOK-HERBER PETRA , BERTSCH-FRANK BIRGIT , LIESER THOMAS , MULLER KLAUS
Abstract: Sodium percarbonate of the formula 2 Na2CO3 3 H2O2 can be produced by fluidised-bed spray granulation by spraying an aqueous solution of sodium carbonate and a hydrogen peroxide solution on sodium percarbonate seeds and evaporating water. The previously necessary use of phosphorus-containing crystallisation inhibitor to prevent blockages and incrustations in and on the nozzle can be avoided by the invention if the solutions are sprayed using a single three-substance pulverisation nozzle with the external mixing of the solutions.
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公开(公告)号：CZ9600018A3
公开(公告)日：1996-05-15
申请号：CZ1896
申请日：1994-04-23
Applicant: DEGUSSA
Inventor： BERTSCH-FRANK BIRGIT , BEWERSDORF MARTIN KASSELER , KLASEN CLASS-JURGEN , LIESER THOMAS , MULLER KLAUS , ROLLMANN JURGEN
CPC classification number: C01B15/106 , C11D3/3942 , C11D17/0039
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公开(公告)号：CZ1896A3
公开(公告)日：1996-05-15
申请号：CZ1896
申请日：1994-04-23
Applicant: DEGUSSA
Inventor： BERTSCH-FRANK BIRGIT , BEWERSDORF MARTIN KASSELER , KLASEN CLASS-JURGEN , LIESER THOMAS , MULLER KLAUS , ROLLMANN JURGEN
Abstract: In the prior art, sodium percarbonate is coated with compounds which produce a stabilizing action in order to increase the shelf life. There is a need for an improved, boron-free, coating for sodium percarbonate. Proposed by the invention is a particle coating containing sodium carbonate plus one or more optionally partly hydrated magnesium compounds, preferably magnesium sulphate, in a single coat or in separate coats. The coating preferably contains two coats. The particles are produced by spraying aqueous solutions containing the coating compounds on to sodium percarbonate in a fluidized bed and at the same time evaporating off the water. Their long shelf life makes particles coated in this way suitable for use in washing, bleaching and cleaning agents.
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公开(公告)号：SK4296A3
公开(公告)日：1996-05-08
申请号：SK4296
申请日：1994-04-23
Applicant: DEGUSSA
Inventor： BERTSCH-FRANK BIRGIT , BEWERSDORF MARTIN , KLASEN CLASS-JURGEN , LIESER THOMAS , MULLER KLAUS , ROLLMANN JURGEN
Abstract: In the prior art, sodium percarbonate is coated with compounds which produce a stabilizing action in order to increase the shelf life. There is a need for an improved, boron-free, coating for sodium percarbonate. Proposed by the invention is a particle coating containing sodium carbonate plus one or more optionally partly hydrated magnesium compounds, preferably magnesium sulphate, in a single coat or in separate coats. The coating preferably contains two coats. The particles are produced by spraying aqueous solutions containing the coating compounds on to sodium percarbonate in a fluidized bed and at the same time evaporating off the water. Their long shelf life makes particles coated in this way suitable for use in washing, bleaching and cleaning agents.
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