公开(公告)号：AU691690B2

公开(公告)日：1998-05-21

申请号：AU3868495

申请日：1995-10-23

Applicant: DEGUSSA

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

IPC: A01N35/02 ,  A01N43/28 ,  C07C43/303 ,  C07C45/51 ,  C07C45/59 ,  C02F1/50

公开(公告)号：DE4326575C2

公开(公告)日：1997-09-18

申请号：DE4326575

申请日：1993-08-07

Applicant: DEGUSSA

Inventor： WERLE PETER DR ,  GEISLER BERND ,  TRAGESER MARTIN

IPC: B01J19/18 ,  B01J19/24 ,  C02F1/50 ,  C02F1/68 ,  C02F1/00

Abstract: Flowing waters are dosed with acrolein to prevent excessive plant and algal growth. In order to avoid transport of acrolein, the process according to the invention, using the apparatus according to the invention, generates acrolein at the site of use by deacetylization of an acrolein acetal in the presence of an aqueous mineral acid, for which no electrical energy is required. According to the invention an acrolein acetal solution and an aqueous mineral acid solution are transported from pressure-resistant storage vessels (1) and (2) into a mixing chamber (11) by applying a pressure from a pressurized gas cylinder (3) and the mixture is passed through a deacetalization reactor; the reactor to be used comprises a tubular (14) and a vessel-like (15) part.

公开(公告)号：AU1484497A

公开(公告)日：1997-08-28

申请号：AU1484497

申请日：1997-02-21

Applicant: DEGUSSA

Inventor： WERLE PETER ,  KRIMMER HANS-PETER ,  TRAGESER MARTIN ,  KUNZ FRANZ-RUDOLF

IPC: A01N35/02 ,  C08G2/14 ,  C08G2/18 ,  C08G4/00 ,  C08G6/00

公开(公告)号：CA2198158A1

公开(公告)日：1997-08-22

申请号：CA2198158

申请日：1997-02-21

Applicant: DEGUSSA

Inventor： KRIMMER HANS-PETER ,  TRAGESER MARTIN ,  KUNZ FRANZ-RUDOLF ,  WERLE PETER

IPC: A01N35/02 ,  C08G2/14 ,  C08G2/18 ,  C08G4/00 ,  C08G6/00 ,  A01N25/10

Abstract: Acrolein copolymers prepared from acrolein and one or more polyhydric alcohols, which will release monomeric acrolein in an aqueous system and hence have a prolonged effect on microorganisms. The copolymer is prepared by adding acrolein to a reaction medium containing one or more polyhydric alcohols and a catalyst in dissolved form, while not allowing the temperature of the reaction medium to rise above 50.degree.C. The acrolein-releasing copolymer may be used in aqueous systems as a biocide.

公开(公告)号：NO973148L

公开(公告)日：1997-07-07

申请号：NO973148

申请日：1997-07-07

Applicant: DEGUSSA

Inventor： WERLE PETER ,  TRAGESER MARTIN ,  HELMLING OSWALD ,  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：DE59010531D1

公开(公告)日：1996-11-14

申请号：DE59010531

申请日：1990-11-07

Applicant: DEGUSSA

Inventor： WERLE PETER DR ,  TRAGESER MARTIN ,  STOBER REINHARD DR

IPC: A01N33/00 ,  A01N47/44 ,  A01N61/00 ,  C07C279/12 ,  C08G73/02 ,  C08G73/04

公开(公告)号：FI97440B

公开(公告)日：1996-09-13

申请号：FI915682

申请日：1991-12-02

Applicant: DEGUSSA

Inventor： WERLE PETER ,  TRAGESER MARTIN ,  PIANA HERMANN

IPC: C02F1/50 ,  C07C45/51 ,  C07C47/22 ,  A01N35/02

Abstract: The direct dosing of aqueous solutions with acrolein as a microbiocide is problematic because of the associated laborious safety measures and the hitherto known use of reaction mixtures from the deacetalisation has proven not to be very economical. … According to the invention, aqueous solutions can be dosed in a simple, safe and economical manner with acrolein at a sufficient concentration level to be active as a biocide by cleaving acrolein acetals in the aqueous phase in the presence of a strongly acid deacetalisation catalyst into acrolein and the alcohol component, continuously removing the resulting acrolein from the deacetalisation mixture and transferring the acrolein into the aqueous solution to be dosed using an inert gas stream or a liquid jet pump with the aqueous solution to be dosed as the jet liquid.

公开(公告)号：DE19505171A1

公开(公告)日：1996-08-22

申请号：DE19505171

申请日：1995-02-16

Applicant: DEGUSSA

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

IPC: A01N35/02 ,  C02F1/50 ,  C07C45/59 ,  C09K23/00 ,  A01N25/30 ,  C07D317/12 ,  C07C47/22 ,  C07C45/65 ,  A01M21/00

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：DE19504042A1

公开(公告)日：1996-05-23

申请号：DE19504042

申请日：1995-02-08

Applicant: DEGUSSA

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

IPC: A01N35/02 ,  A01N43/28 ,  C02F1/50 ,  C07C43/303 ,  C07C45/51 ,  C07C45/59 ,  C07C45/43 ,  C07C45/56 ,  C07C47/22 ,  C07D317/12

Abstract: The direct handling of acrolein for combating microbial, plant and animal parasites in water and soil is problematic owing to the potential risks posed by acrolein. According to the invention, an easy-to-handle acrolein-releasing composition is used, the acrolein being released at the site of use owing to contact with water. This composition contains (i) an acrolein acetal having a C1 to C6 alcohol with 1 to 4 hydroxyl groups and (ii) a chemically compatible acid which is soluble therein and has a pKs value of less than 4 and (iii) is anhydrous. A preferred composition contains as acetal 2-vinyl-1,3-dioxolane, as acid, anhydrous oxalic acid, fumaric acid or maleic acid or a mixture of mono and di(C1 to C3)alkylphosphate and additionally a non-ionic surfactant.

公开(公告)号：AU668658B2

公开(公告)日：1996-05-09

申请号：AU7418894

申请日：1994-09-23

Applicant: DEGUSSA

Inventor： WERLE PETER ,  PAHLING WERNER ,  TRAGESER MARTIN

IPC: A01N35/02 ,  C02F1/50 ,  C07C45/86 ,  A01N25/08 ,  A01N25/14 ,  A01N25/26 ,  A01N25/34

Abstract: Liquid acrolein, whose hazardous properties make handling difficult, is used to dose aqueous systems with acrolein in a biocidally effective concentration. Disclosed are agents which increase the ease and safety of acrolein handling and which are characterized by a content of 30 to 95% by weight acrolein and 5 to 70% by weight inorganic carrier materials. Silicas are the preferred carrier materials. The powdery or highly viscous mixture of substances will preferably exist in molded form and is additionally provided with a cladding that is impermeable to acrolein vapor. In dosing the aqueous systems, the agents are introduced directly in the water whereupon the acrolein is released.