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公开(公告)号：DE69605945T2
公开(公告)日：2000-05-04
申请号：DE69605945
申请日：1996-11-14
Applicant: DEGUSSA
Inventor： SCHUETTE RUEDIGER , BEWERSDORF MARTIN , KLASEN CLAAS-JUERGEN
Abstract: In order to increase active oxygen stability, sodium percarbonate is coated with single or multiple layers of various substances. Sodium percarbonate particles consist of a core of sodium percarbonate fluidized bed spray granulate and sodium sulphate, which may be partially hydrated, as the sole constituent of a single coating layer. The particles exhibit both elevated active oxygen stability and very good ensilability. The coating layer is applied by spraying an aqueous Na2SO4 solution onto the particles to be coated, which were themselves produced by fluidized bed spray granulation, in a fluidized bed and vaporizing water at a fluidized bed temperature of 35 to 100 DEG C.
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公开(公告)号：DE59309706D1
公开(公告)日：1999-09-02
申请号：DE59309706
申请日：1993-11-10
Applicant: DEGUSSA
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公开(公告)号：PL173925B1
公开(公告)日：1998-05-29
申请号：PL31103594
申请日：1994-02-28
Applicant: DEGUSSA
Inventor： BERTSCH-FRANK BIRGIT , KLASEN CLAAS-JUERGEN , LIESER THOMAS , MUELLER KLAUS , BEWERSDORF MARTIN
Abstract: PCT No. PCT/EP94/00576 Sec. 371 Date Oct. 2, 1995 Sec. 102(e) Date Oct. 2, 1995 PCT Filed Feb. 28, 1994 PCT Pub. No. WO94/24044 PCT Pub. Date Oct. 27, 1994Sodium percarbonate is often used in the form of coated particles to increase its storage stability in detergents. Sodium percarbonate particles coated in accordance with the invention have a coating containing reaction products from the reaction of a dialkali metal tetraborate or alkali metal pentaborate with aqueous hydrogen peroxide. Preferred coating components are: perborax with the formula Na2B4O7xH2O2, where n =2 or 4. The coated sodium percarbonate particles are produced by coating the percarbonate particles using a solution containing the reaction products mentioned above. Detergent, bleaching and cleaning compositions containing sodium percarbonate particles coated in accordance with the invention are distinguished by very high stability in storage.
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公开(公告)号：DE59405122D1
公开(公告)日：1998-02-26
申请号：DE59405122
申请日：1994-04-23
Applicant: DEGUSSA
Inventor： BERTSCH-FRANK BIRGIT , BEWERSDORF MARTIN , KLASEN CLAAS-JUERGEN , LIESER THOMAS , MUELLER KLAUS , ROLLMANN JUERGEN
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：ZA974733B
公开(公告)日：1997-12-30
申请号：ZA974733
申请日：1997-05-29
Applicant: DEGUSSA
Inventor： HOEFLER ANDREAS , ALT HANS-CHRISTIAN , KLASEN CLAAS-JUERGEN , FRIEDRICH HEINZ , HERTZ ULRICH , MOERL LOTHAR , SCHUETTE RUEDIGER
Abstract: Preparation of a fermented sludge for use as an animal feed additive which contains a fermentation product, comprises granulation, compaction and drying of the sludge in a fluidised bed, at the same time as introducing extra mechanical energy above that needed to fluidise the bed particles, in order to achieve the desired additive particle size and bulk weight.
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Patent Agency Ranking
公开(公告)号：AT156096T
公开(公告)日：1997-08-15
申请号：AT94909085
申请日：1994-02-28
Applicant: DEGUSSA
Inventor： BERTSCH-FRANK BIRGIT , KLASEN CLAAS-JUERGEN , LIESER THOMAS , MUELLER KLAUS , BEWERSDORF MARTIN
Abstract: PCT No. PCT/EP94/00576 Sec. 371 Date Oct. 2, 1995 Sec. 102(e) Date Oct. 2, 1995 PCT Filed Feb. 28, 1994 PCT Pub. No. WO94/24044 PCT Pub. Date Oct. 27, 1994Sodium percarbonate is often used in the form of coated particles to increase its storage stability in detergents. Sodium percarbonate particles coated in accordance with the invention have a coating containing reaction products from the reaction of a dialkali metal tetraborate or alkali metal pentaborate with aqueous hydrogen peroxide. Preferred coating components are: perborax with the formula Na2B4O7xH2O2, where n =2 or 4. The coated sodium percarbonate particles are produced by coating the percarbonate particles using a solution containing the reaction products mentioned above. Detergent, bleaching and cleaning compositions containing sodium percarbonate particles coated in accordance with the invention are distinguished by very high stability in storage.
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17.发明专利
公开(公告)号：PL312608A1
公开(公告)日：1996-04-29
申请号：PL31260894
申请日：1994-04-23
Applicant: DEGUSSA
Inventor： BERTSCH-FRANK BIRGIT , BEWERSDORF MARTIN , KLASEN CLAAS-JUERGEN , LIESER THOMAS , MUELLER KLAUS , ROLLMANN JUERGEN
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：HU9600079D0
公开(公告)日：1996-03-28
申请号：HU9600079
申请日：1994-04-23
Applicant: DEGUSSA
Inventor： BERTSCH-FRANK BIRGIT , BEWERSDORF MARTIN , KLASEN CLAAS-JUERGEN , LEISER THOMAS , MUELLER KLAUS , ROLLMANN JUERGEN
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：FI954808A0
公开(公告)日：1995-10-09
申请号：FI954808
申请日：1995-10-09
Applicant: DEGUSSA
Inventor： BERTSCH-FRANK BIRGIT , KLASEN CLAAS-JUERGEN , LIESER THOMAS , MUELLER KLAUS , BEWERSDORF MARTIN
Abstract: PCT No. PCT/EP94/00576 Sec. 371 Date Oct. 2, 1995 Sec. 102(e) Date Oct. 2, 1995 PCT Filed Feb. 28, 1994 PCT Pub. No. WO94/24044 PCT Pub. Date Oct. 27, 1994Sodium percarbonate is often used in the form of coated particles to increase its storage stability in detergents. Sodium percarbonate particles coated in accordance with the invention have a coating containing reaction products from the reaction of a dialkali metal tetraborate or alkali metal pentaborate with aqueous hydrogen peroxide. Preferred coating components are: perborax with the formula Na2B4O7xH2O2, where n =2 or 4. The coated sodium percarbonate particles are produced by coating the percarbonate particles using a solution containing the reaction products mentioned above. Detergent, bleaching and cleaning compositions containing sodium percarbonate particles coated in accordance with the invention are distinguished by very high stability in storage.
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公开(公告)号：FI954109A0
公开(公告)日：1995-09-01
申请号：FI954109
申请日：1995-09-01
Applicant: DEGUSSA
Inventor： KLASEN CLAAS-JUERGEN , BERTSCH-FRANK BIRGIT , LIESER THOMAS , SCHUBERT PETER , MUELLER KLAUS
Abstract: PCT No. PCT/EP94/00422 Sec. 371 Date Sep. 28, 1995 Sec. 102(e) Date Sep. 28, 1995 PCT Filed Feb. 15, 1994 PCT Pub. No. WO94/20413 PCT Pub. Date Sep. 15, 1994The invention relates to a method for increasing the storage stability of sodium percarbonate (2 Na2CO3.3 H2O2) by coating with a sodium perborate. According to the present invention wet sodium percarbonate salt, obtained by reacting sodium carbonate with hydrogen peroxide in aqueous phase and separating the salt from the aqueous phase, is treated with a solution or suspension containing sodium perborate in a solid-liquid separator by a kind of displacement wash. In contrast to previously known methods, according to the present invention a greater storage stability is attained with smaller quantities of perborate coating.
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