公开(公告)号：CA2213215A1

公开(公告)日：1996-08-22

申请号：CA2213215

申请日：1996-02-01

Applicant: DEGUSSA

Inventor： HELMLING OSWALD ,  WERLE PETER ,  TRAGESER MARTIN ,  JAKOB HARALD

IPC: A01N35/02 ,  C02F1/50 ,  C07C45/59 ,  C09K23/00

Abstract: The potential hazards of acraldhyde make its direct handling for combatting microbial, vegetable and animal pests in the water and ground difficult. According to the invention, use is made of a composition releasing acraldhyde in contact with water at the point of use. The composition of the invention contains an acraldehyde acetal, preferably 2-vinyl-2, 3-dioxolane, and a compound hydrolysable to an acide with a pKs of lower than 4, especially one from the range of organic acid anhydrides, organic acid halides and inorganic halogen compounds forming hydrogen halides on hydrolysis.

公开(公告)号：NZ270467A

公开(公告)日：1995-11-27

申请号：NZ27046795

申请日：1995-02-08

Applicant: DEGUSSA

Inventor： WERLE PETER ,  HOPP MATHIAS ,  HELMLING OSWALD ,  ARNTZ DIETRICH

IPC: A01N35/02 ,  C08F16/34 ,  C08F116/34

Abstract: Acrolein (2-propenal) polymers (I) with an average wt. (Mw) of 2000-6000 (see calculation) and a carbonyl content of 0.5-5 mol/kg are new. Also claimed are:(1) prodn. of (I) by adding acrolein and a catalyst simultaneously to a reaction medium having a temp. of ≤ 25 degrees C and a pH of 10-11, stirring the mixt., and separating (I);(2) preservation of materials by adding (I); and(3) biocidal compsns. contg. (I). Mw = ni Mi / ni Mi where Mw = average weight, ni = molar number and Mi = molecular weight.

公开(公告)号：MX166992B

公开(公告)日：1993-02-19

申请号：MX2200590

申请日：1990-08-17

Applicant: DEGUSSA

Inventor： MEIER JURGEN ,  ARNOL GERHARD ,  HELMLING OSWALD

IPC: D21C9/10 ,  D21C9/147 ,  D21C9/16

Abstract: Delignification and bleaching of lignocellulosic material is enhanced after the pulp has been treated with peroxomonosulfuric acid.

公开(公告)号：FI87472B

公开(公告)日：1992-09-30

申请号：FI871956

申请日：1987-05-04

Applicant: DEGUSSA

Inventor： SUESS HANS ULRICH ,  EUL WILFRIED ,  HELMLING OSWALD ,  MAIER JUERGEN

IPC: D21C5/02 ,  D21C9/10

公开(公告)号：ITTO910889A1

公开(公告)日：1992-05-21

申请号：ITTO910889

申请日：1991-11-19

Applicant: DEGUSSA

Inventor： HELMLING OSWALD ,  LOSS CARL ,  SOLDAVINI HEINZ

IPC: B01D20060101 ,  B01D53/30 ,  B01D53/50 ,  C01B17/74

公开(公告)号：DE4036899A1

公开(公告)日：1992-05-21

申请号：DE4036899

申请日：1990-11-20

Applicant: DEGUSSA

Inventor： SOLDAVINI HEINZ ,  LOSS CARL ,  HELMLING OSWALD

IPC: B01D53/30 ,  B01D53/50 ,  C01B17/74

Abstract: Process for desulphurisation of moist SO2-contg. exhaust gases, with recovery of pure H2SO4, by contacting the gases with aq. H2O2 at temps. below 60 deg.C comprises freeing the raw gas from the identified temp. condensable components in a condenser at 5-40 deg.C, the condenser outlet gas is introduced into a vessel contg. aq. H2O2 initially at a concn. of 5-70% w/w H2O2, until the H2O2 has produced a stoichiometric equiv. of H2SO4, with the reaction end point being electrometrically determined, and the Redox electrode providing on/off control for the gas inlet flow. USE/ADVANTAGE - Conversion of harmful SO2 contg. gas effluents into economically valuable sulphuric acid, and avoiding mud/solids handling problems of existing process, e.g. in the treatment of gases from the sulphite preservation of grape juice in the winemaking industry.

公开(公告)号：ZA913560B

公开(公告)日：1992-02-26

申请号：ZA913560

申请日：1991-05-10

Applicant: DEGUSSA

Inventor： WEDEL WEDIGO VON ,  WEDIGO VON WEDEL ,  SENFF ELKE ,  ELKE SENFF ,  HELMLING OSWALD ,  OSWALD HELMLING

IPC: B01D53/94 ,  B01D53/86 ,  B01J21/04 ,  B01J21/06 ,  B01J21/08 ,  B01J21/16 ,  B01J21/18 ,  B01J23/74 ,  B01J23/755 ,  B01J29/06 ,  B01J31/08 ,  C01B21/38 ,  C01B21/40 ,  B01D ,  C01B

Abstract: A method for the removal of nitrogen oxides from waste gases and for obtaining nitric acid is described. The waste gas is charged with the required amount of hydrogen peroxide, converted into the gas phase, and the gas mixture is reacted on a solid catalyst to hydrogen nitrate, which is either withdrawn for further use or is converted into nitric acid either by condensation or by scrubbing with water. The method permits the removal of NOx at low concentrations below 2000 ppm with efficiencies above 90%.

公开(公告)号：ZA9103560B

公开(公告)日：1992-02-26

申请号：ZA9103560

申请日：1991-05-10

Applicant: DEGUSSA

Inventor： WEDEL WEDIGO VON ,  WEDIGO VON WEDEL ,  SENFF ELKE ,  ELKE SENFF ,  HELMLING OSWALD ,  OSWALD HELMLING

IPC: B01D53/94 ,  B01D53/86 ,  B01J21/04 ,  B01J21/06 ,  B01J21/08 ,  B01J21/16 ,  B01J21/18 ,  B01J23/74 ,  B01J23/755 ,  B01J29/06 ,  B01J31/08 ,  C01B21/38 ,  C01B21/40 ,  B01D ,  C01B

CPC classification number: B01D53/8628 ,  B01D53/8625 ,  C01B21/38 ,  Y02C20/10 ,  Y02P20/153

公开(公告)号：AU7701291A

公开(公告)日：1991-11-14

申请号：AU7701291

申请日：1991-05-13

Applicant: DEGUSSA

Inventor： WEDEL WEDIGO VON ,  SENFF ELKE ,  HELMLING OSWALD

IPC: B01D53/94 ,  B01D53/86 ,  B01J21/04 ,  B01J21/06 ,  B01J21/08 ,  B01J21/16 ,  B01J21/18 ,  B01J23/74 ,  B01J23/755 ,  B01J29/06 ,  B01J31/08 ,  C01B21/38 ,  C01B21/40 ,  B01D53/36 ,  B01D53/34

Abstract: A method for the removal of nitrogen oxides from waste gases and for obtaining nitric acid is described. The waste gas is charged with the required amount of hydrogen peroxide, converted into the gas phase, and the gas mixture is reacted on a solid catalyst to hydrogen nitrate, which is either withdrawn for further use or is converted into nitric acid either by condensation or by scrubbing with water. The method permits the removal of NOx at low concentrations below 2000 ppm with efficiencies above 90%.

公开(公告)号：ZA889289B

公开(公告)日：1989-09-27

申请号：ZA889289

申请日：1988-12-12

Applicant: DEGUSSA

Inventor： SUESS HANS ULRICH ,  HANS ULRICH SUESS ,  MEIER JUERGEN ,  JUERGEN MEIER ,  HELMLING OSWALD ,  OSWALD HELMLING

IPC: D21C9/10 ,  D21C