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

IPC: C01B15/10 ,  C11D3/39 ,  C11D3/395 ,  C11D7/54 ,  C11D17/00

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：FI960208A

公开(公告)日：1996-01-16

申请号：FI960208

申请日：1996-01-16

Applicant: DEGUSSA

Inventor： BERTSCH-FRANK BIRGIT ,  BEWERSDORF MARTIN ,  KLASEN CLAAS-JUERGEN ,  LIESER THOMAS ,  MUELLER KLAUS ,  ROLLMANN JUERGEN

IPC: C01B15/10 ,  C11D3/39 ,  C11D3/395 ,  C11D7/54 ,  C11D17/00 ,  C01B ,  C11D

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：ZA946621B

公开(公告)日：1995-04-03

申请号：ZA946621

申请日：1994-08-30

Applicant: DEGUSSA

Inventor： BEWERSDORF MARTIN ,  LOOK-HERBER PETRA ,  LIESER THOMAS ,  KLASEN CLAAS-JUERGEN ,  BERTSCH-FRANK BIRGIT ,  MUELLER KLAUS

IPC: B01D1/20 ,  B01J2/04 ,  B01J2/16 ,  B05B7/06 ,  C01B15/10 ,  C01B ,  B01J ,  B05B

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：ZA9406621B

公开(公告)日：1995-04-03

申请号：ZA9406621

申请日：1994-08-30

Applicant: DEGUSSA

Inventor： BEWERSDORF MARTIN ,  LOOK-HERBER PETRA ,  LIESER THOMAS ,  KLASEN CLAAS-JUERGEN ,  BERTSCH-FRANK BIRGIT ,  MUELLER KLAUS

IPC: B01D1/20 ,  B01J2/04 ,  B01J2/16 ,  B05B7/06 ,  C01B15/10 ,  C01B ,  B01J ,  B05B

CPC classification number: B05B7/061 ,  B01D1/20 ,  B01J2/04 ,  B01J2/16 ,  C01B15/103

公开(公告)号：ZA945218B

公开(公告)日：1995-02-27

申请号：ZA945218

申请日：1994-07-15

Applicant: DEGUSSA

Inventor： BERTSCH-FRANK BIRGIT ,  BEWERSDORF MARTIN ,  KLASEN CLAAS-JUERGEN ,  LIESER THOMAS ,  MUELLER KLAUS ,  ROLLMANN JUERGEN

IPC: C01B15/10 ,  C11D3/39 ,  C11D3/395 ,  C11D7/54 ,  C11D17/00 ,  C01B ,  C11D ,  D06L

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：CA2159991A1

公开(公告)日：1994-10-27

申请号：CA2159991

申请日：1994-02-28

Applicant: DEGUSSA

Inventor： BERTSCH-FRANK BIRGIT ,  KLASEN CLAAS-JUERGEN ,  LIESER THOMAS ,  MUELLER KLAUS ,  BEWERSDORF MARTIN

IPC: C01B15/10 ,  C02F1/00 ,  C11D3/39 ,  C11D3/395 ,  C11D17/00

Abstract: Sodium percarbonate is often used, in the form of encapsulated particles, in washing and cleaning agents in order to increase their shelf life. Sodium percarbonate particles encapsulated as proposed by the invention have an envelope containing the products of the reaction between a di-alkali-metal tetraborate or alkali-metal pentaborate and aqueous hydrogen peroxide. Preferred envelope components are perborax compounds of the formula Na2B4O7.nH2O2 in which n is 1 or 4. The encapsulated sodium percarbonate particles are produced by coating the percarbonate particles using a solution containing the specified reaction products. Washing, bleaching and cleaning agents containing sodium percarbonate particles encapsulated as proposed by the invention are characterized by their very long shelf life.

公开(公告)号：SI9400104A

公开(公告)日：1994-09-30

申请号：SI9400104

申请日：1994-03-01

Applicant: DEGUSSA

Inventor： KLASSEN CLASS ,  BERTSCH-FRANK BIRGIT ,  LIESER THOMAS ,  SCHUBERT PETER ,  MUELLER KLAUS

IPC: B01D12/00 ,  C01B15/10 ,  C11D3/39 ,  C11D17/00

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：ZA9304158B

公开(公告)日：1994-01-13

申请号：ZA9304158

申请日：1993-06-11

Applicant: DEGUSSA

Inventor： BERTSCH-FRANK BIRGIT ,  STEIN GUENTER ,  ZIKOFSKY WOLFGANG ,  HERZIG JOERG

IPC: C01B15/12 ,  C11D7/54 ,  C11D11/00 ,  D06L3/02 ,  C01B ,  B01J ,  C11D ,  D06L

CPC classification number: C01B15/12 ,  C01B15/126

公开(公告)号：DK727888A

公开(公告)日：1989-08-14

申请号：DK727888

申请日：1988-12-29

Applicant: DEGUSSA

Inventor： BERTSCH-FRANK BIRGIT ,  MUELLER KLAUS ,  LIESER THOMAS

IPC: B01J2/00 ,  C01B15/12

公开(公告)号：CA2420622C

公开(公告)日：2009-10-20

申请号：CA2420622

申请日：2001-08-02

Applicant: DEGUSSA ,  UHDE GMBH

Inventor： BALDUF TORSTEN ,  SCHUTTE RUDIGER ,  BERTSCH-FRANK BIRGIT ,  MARKOWZ GEORG ,  ROLLMANN JURGEN ,  WILDNER WERNER ,  BECKER CATRIN ,  HEMME INA

IPC: B01J19/24 ,  B01F5/00 ,  B01F5/04 ,  B01F13/00 ,  B01J3/04 ,  B01J8/00 ,  B01J8/02 ,  B01J19/00 ,  C01B15/029 ,  C07B61/00 ,  C07C45/35 ,  C07C47/21 ,  C07C47/22 ,  C07C51/25 ,  C07C57/04 ,  C07C57/05 ,  C07D301/12 ,  C07D303/04 ,  F28D9/00 ,  F28F3/12

Abstract: Reactions between at least two fluid reactants are performed in a reactor comprising wall elements (1), slot-shaped reaction spaces (3) and cavities ( 5) for conducting a fluid heat-carrier through. Depending on the process and throughput, a modular structural design is chosen wherein an arbitrary numbe r of wall elements (1) are assembled to a right-parallelepipedal block (24), t he reaction spaces (3) are formed between lateral surfaces (2) of right- parallelepipedal wall elements (1), the reactants are introduced into the reaction spaces (3) from edge regions of one side of the block (24) and are conducted through the reaction spaces (3) in parallel flows and the fluid he at- carrier is conducted through the tubular cavities (5) extending in the interior of the wall elements (1).