-
公开(公告)号：AT164817T
公开(公告)日：1998-04-15
申请号：AT94907569
申请日：1994-02-15
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.
-
公开(公告)号：PL322891A1
公开(公告)日：1998-03-02
申请号：PL32289196
申请日：1996-04-03
Applicant: DEGUSSA
Inventor： SCHUETTE RUDIGER , KLASEN CLAAS-JUERGEN , BEWERSDORF MARTIN , ALT HANS-CHRISTIAN
Abstract: PCT No. PCT/EP96/01453 Sec. 371 Date Sep. 26, 1997 Sec. 102(e) Date Sep. 26, 1997 PCT Filed Apr. 3, 1996 PCT Pub. No. WO96/33009 PCT Pub. Date Oct. 24, 1996This invention relates to a process for the production of granulates by fluidized bed spray granulation and to a device for this purpose. Liquid starting materials may be converted into granulates by fluidized bed spray granulation. In order to ensure elevated material throughput, numerous nozzles, which are moreover susceptible to plugging and encrustation, must be installed. The disadvantages of known processes may be overcome according to the invention by arranging at least two spray nozzles at least partially directed towards each other in such a manner and the quantity of spray is adjusted in such a manner that their spray jets collide within the fluidized bed and substantially no liquid strike-through occurs onto a surface delimiting the fluidized bed or out of the fluidized bed. The spray jets of two spray nozzles directed towards each other collide frontally or enclose an angle of less than 180 DEG ; the angle is preferably between 150 DEG and 180 DEG . The device according to the invention comprises a flow channel (1) with laterally arranged spray nozzles (8), wherein in each case two exactly opposing or staggered spray nozzles are oriented in such a manner that the spray jets collide within the fluidized bed. Sodium percarbonate production is exemplfied.
-
公开(公告)号：AT162497T
公开(公告)日：1998-02-15
申请号：AT94915106
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.
-
公开(公告)号：CA2206587A1
公开(公告)日：1997-11-30
申请号：CA2206587
申请日：1997-05-30
Applicant: DEGUSSA
Inventor： HERTZ ULRICH , HOEFLER ANDREAS , MOERL LOTHAR , FRIEDRICH HEINZ , SCHUETTE RUEDIGER , ALT HANS-CHRISTIAN , KLASEN CLAAS-JUERGEN
Abstract: A process for the preparation of an animal feed supplement based on a fermentation broth is disclosed, wherein the supplement contains wholly or predominantly a fermentation product and other constituents of the fermentation broth. The fermentation broth is granulated, compacted and dried in a fluidised bed in one step, whilst a sufficient amount of energy to obtain a desired particle diameter and a desired bulk density is introduced into the fluidised bed by mechanical means, in addition to the energy required to produce the fluidised bed. As a result, it is possible to prepare continuously, in a single process step, granules conforming to specifications of additives such as lysine, threonine or tryptophan using, in particular, raw fermentation broths as starting materials.
-
公开(公告)号：HU9700977D0
公开(公告)日：1997-07-28
申请号：HU9700977
申请日：1997-05-30
Applicant: DEGUSSA
Inventor： ALT HANS-CHRISTIAN , FRIEDRICH HEINZ , HERTZ ULRICH , HOEFLER ANDREAS , KLASEN CLAAS-JUERGEN , 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.
-
Patent Agency Ranking
公开(公告)号：FI971859A
公开(公告)日：1997-04-30
申请号：FI971859
申请日：1997-04-30
Applicant: DEGUSSA
Inventor： BEWERSDORF MARTIN , BERTSCH-FRANK BIRGIT , KLASEN CLAAS-JUERGEN , LIESER THOMAS , SCHUETTE RUEDIGER
Abstract: The invention concerns washing, bleaching and cleaning agent compositions containing coated alkali metal percarbonate, in particular sodium percarbonate, and conventional components of such compositions, including in particular silicate-like builders. Compositions according to the invention, which have good stability during storage yet dissolve rapidly and thus render extension of the washing, bleaching or cleaning period unnecessary, contain an alkali metal percarbonate with an Oa* content in the composition of at least 70 %, a dissolution time of the alkali metal percarbonate in water of less than 10 minutes, determined under specific test conditions in each case, and a morphology index MI greater than 0.03, in particular greater than 0.04, in which: MI = 0.0448 . CV + 3.61 . 10 . d ; CV = sigma /d; sigma = 2ROOT SIGMA (di-d) .wi/100 and d = SIGMA di.wi/100.
-
公开(公告)号：HUT73680A
公开(公告)日：1996-09-30
申请号：HU9600510
申请日：1994-04-23
Applicant: DEGUSSA
Inventor： BERTSCH-FRANK BIRGIT , BEWERSDORF MARTIN , KLASEN CLAAS-JUERGEN , LIESER THOMAS , LOOKHERBER PETRA , MUELLER 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.
-
公开(公告)号：BR9407374A
公开(公告)日：1996-07-16
申请号：BR9407374
申请日：1994-04-23
Applicant: DEGUSSA
Inventor： BEWERSDORF MARTIN , KLASEN CLAAS-JUERGEN , LOOK-HERBER PETRA , BERTSCH-FRANK BIRGIT , LIESER THOMAS , MUELLER 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.
-
公开(公告)号：FI960938A
公开(公告)日：1996-04-25
申请号：FI960938
申请日：1996-02-28
Applicant: DEGUSSA
Inventor： BEWERSDORF MARTIN , KLASEN CLAAS-JUERGEN , LOOK-HERBER PETRA , BERTSCH-FRANK BIRGIT , LIESER THOMAS , MUELLER 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.
-
公开(公告)号：FI954109A
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.
-
-
-
-
-
-
-
-
-
Search Results
63
records
(took 0.021 seconds)
