Abstract:
PROBLEM TO BE SOLVED: To provide a method of producing 2, 4, 6-tri-mercapto-1, 3, 5-triazine which surpasses the method of the prior technique in the economical aspect and the environmental aspect and can overcome defects in the heretofore known method.SOLUTION: The method of producing 2, 4, 6-tri-mercapto-1, 3, 5-triazine includes a process of acidifying a solution of a salt corresponding to 2, 4, 6-tri-mercapto-1, 3, 5-triazine in the aqueous solution to produce the 2, 4, 6-tri-mercapto-1, 3, 5-triazine while keeping a scope of pH1.5 to 2.5 during operation of acidifying.
Abstract:
PROBLEM TO BE SOLVED: To obtain the subject polymer for a bactericide, etc., capable of inhibiting growth of undesirable seaweeds and plants by adding highly purified acrolein to an alkali aqueous solution containable an emulsifier, etc., with keeping a room temperature and neutralizing with an aqueous solution of mineral acid. SOLUTION: This acrolein-releasable emulsion homopolymer releases acrolein in an aqueous system at a pH higher than 7 and a bactericidal action is exhibited by the releasing to inhibit growth of undesirable seaweeds and plants, thus is useful as a very effective bactericide in treating a waterway or for control of a sulfate reducing bacterium in investigation of petroleum. The emulsion homopolymer is obtained by previously charging an alkali aqueous solution containable of an emulsifier or a humectant in a tank, adding acrolein preferably having >=95wt.% purity to the solution while keeping a temperature at
Abstract:
PROBLEM TO BE SOLVED: To provide a storage-stable aqueous solution containing chlorhexidine. SOLUTION: The composition is powder, granules or tablets, and comprises (i) a saccharic acid, a salt of chlorhexidine and a quaternary ammonium bromide having bacteriocidal action or (ii) chlorhexidine, a saccharic acid or a sugar lactone, and a quaternary ammonium bromide having bacteriocidal action. A solid composition is water soluble and does not separate p-chloroaniline during storage.
Abstract:
PROBLEM TO BE SOLVED: To provide another method for producing solid tris-(2,3-dibromopropyl)-isocyanurate in high efficiency and large scale at a low cost as far as possible. SOLUTION: The isocyanurate compound is separated by contacting the compound with a solid porous adsorbent having a BET surface area of 50-700 m 2 /g in an organic solvent under a specific condition. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To avoid the pollution of a navigable water area by zooplankton and phytoplankton in ballast water. SOLUTION: A peroxy compd.-containing chemical agent added to ballast water contains a water soluble percarboxylic acid having 1-6 carbon atoms as a peroxy compd. and is added to ballast water in an amt. corresponding to 0.1-200 mg of percaboxylic acid per 1 l of ballast water.
Abstract:
PROBLEM TO BE SOLVED: To obtain a chlorhexidine preparation containing chlorhexidine in a water-soluble form by including a chlorhexidine base and a specific saccharic acid or its lactone at a specific molar ratio and further including an auxiliary at a specific amount. SOLUTION: This chlorhexidine preparation has a form of water-soluble powdery mixture. The chlorhexidine comprises (A) chlorhexidine base and (B) one or more saccharic acids or their lactone selected from a series of compounds comprising gluconic acid or gluconolactone, lactobionic acid (a compound of formula I), D-galactone-γ-lactone (a compound of formula II), L-mannonic acid-γ-lactone (a compound of formula III), D-(-)-gluconic acid-γ- lactone, D-(+)-galactouronic acid (a compound of formula IV) and α-D- heptagluconic acid-γ-lactone at a molar ratio of 1:>=2, preferably 1: (2.05-2.6) and further comprises (C) 0-10 wt.%, preferably
Abstract:
Powdered mixtures of chlorhexidine base with selected sugar acids or lactones from the group gluconic acid or gluconolactone, lactobionic acid (I), D-galactono-gamma-lactone (II), L-mannono-gamma-lactone (III), D-(-)-gulono-gamma-lactone (IV), D-(+)-galacturonic acid (V) and alpha-D-heptaglucono-gamma-lactone (VI). The formulations have extraordinary storage stability. New chlorhexidine salts with sugar acid anions based on (I) to (VI) and aqueous solutions of these are also described. The formulations, solutions and pure salts are used as disinfectants and to prepare disinfectants.
Abstract:
The agent contains an aqueous percarboxylic acid with 1 to 6 carbon atoms as peroxygen compound, to which ballast is added water in an amount corresponding to 0.1 to 200 mg percarboxylic acid per liter. Process for avoiding contamination of navigatable body of water with organisms selected from plankton, e.g. epifauna and photo plankton including cystenes, comprises adding reagent containing peroxygen compound to the ballast water, allowing the reagent to react until the organisms are destroyed and feeding the treated water back into the body of water.
Abstract:
Powdered mixtures of chlorhexidine base with selected sugar acids or lactones from the group gluconic acid or gluconolactone, lactobionic acid (I), D-galactono-gamma-lactone (II), L-mannono-gamma-lactone (III), D-(-)-gulono-gamma-lactone (IV), D-(+)-galacturonic acid (V) and alpha-D-heptaglucono-gamma-lactone (VI). The formulations have extraordinary storage stability. New chlorhexidine salts with sugar acid anions based on (I) to (VI) and aqueous solutions of these are also described. The formulations, solutions and pure salts are used as disinfectants and to prepare disinfectants.
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.