Processes for preparing concentrated aqueous liquid biocidal compositions
申请人:Albemarle Corporation
公开号:US06348219B1
公开(公告)日:2002-02-19
The process involves (a) continuously forming bromine chloride from separate feed streams of bromine and chlorine by maintaining said streams under automatic feed rate control whereby the streams are continuously proportioned to come together to form bromine chloride; (b) continuously forming an aqueous product having an active bromine content of at least 100,000 ppm (wt/wt), a pH of at least 7, and an atom ratio of nitrogen to active bromine greater than 0.93:1 by continuously or intermittently feeding into mixing apparatus separate feed streams of (1) bromine chloride formed in (a), and (2) an aqueous solution of alkali metal salt of sulfamic acid, under automatic feed rate control.
Continuous processes for preparing concentrated aqueous liquid biocidal composition
申请人:Albemarle Corporation
公开号:US06352725B1
公开(公告)日:2002-03-05
The process involves (a) continuously forming bromine chloride from separate feed streams of bromine and chlorine by maintaining said streams under automatic feed rate control whereby the streams are continuously proportioned to come together in equimolar amounts to form bromine chloride; (b) continuously forming an aqueous product having an active bromine content of at least 100,000 ppm (wt/wt), a pH of at least 7, and an atom ratio of nitrogen to active bromine greater than 0.93:1 by continuously feeding into mixing apparatus separate feed streams of (1) bromine chloride formed in (a), and (2) an aqueous solution of alkali metal salt of sulfamic acid, under automatic feed rate control whereby the feed streams are continuously proportioned to come together in amounts that produce an aqueous product having an active bromine content of at least 100,000 ppm (wt/wt), a pH of at least 7, and an atom ratio of nitrogen to active bromine from (1) and (2) greater than 0.93:1; and, (c) withdrawing said aqueous product from said mixing apparatus at a rate sufficient to enable the continuous feeding in (a) and (b) to be maintained.
Methods for the preparation of concentrated aqueous bromine solutions and high activity bromine-containing solids
申请人:Howarth N. Jonathan
公开号:US20050249825A1
公开(公告)日:2005-11-10
The invention includes convenient methods of preparing: (1) highly concentrated liquid bromine-containing biocidal solutions, (2) highly concentrated mixed halogen liquid bromine and chlorine-containing biocidal solutions, and (3) high-activity bromine-containing biocidal solids, all having excellent physical and chemical stability. One method yields solutions that have concentrations of bromine in excess of 18% as Br
2
(8% as Cl
2
) in which the mole ratio of hydroxide ion to hydrogen ion source is at least 1.9:1. Another method employs elemental bromine in conjunction with a solid organic or inorganic halogenating agent to yield halogen solutions at concentrations greater than 22.9% as Br
2
(10.2% as Cl
2
). This method can be performed under conditions that exceed the solubility of the active ingredient such that it crystallizes and is recovered as a hydrated or anhydrous salt in good yield.
[EN] PREPARATION OF CONCENTRATED BROMINE SOLUTIONS AND HIGH ACTIVITY BROMINE SOLIDS<br/>[FR] PRÉPARATION DE SOLUTIONS DE BROME CONCENTRÉ ET DE SOLIDES DE BROME À FORTE ACTIVITÉ
申请人:ENVIRO TECH CHEMICAL SERVICES
公开号:WO2005112649A1
公开(公告)日:2005-12-01
The invention includes convenient methods of preparing: (1) highly concentrated liquid bromine-containing biocidal solutions, (2) highly concentrated mixed halogen liquid bromine and chlorine-containing biocidal solutions, and (3) high-activity bromine containing biocidal solids, all having excellent physical and chemical stability. One method yields solutions that have concentrations of bromine in excess of 18% as Br2 (8% as C12) in which the mole ratio of hydroxide ion to hydrogen ion source is at least 1.9: 1. Another method employs elemental bromine in conjunction with a solid organic or inorganic halogenating agent to yield halogen solutions at concentrations greater than 22.9% as Br2 (10.2% as C12). This method can be performed under conditions that exceed the solubility of the active ingredient such that it crystallizes and is recovered as a hydrated or anhydrous salt in good yield.
There are provided methods for controlling microbial or bioflim growth, comprising mixing a hypochlorite oxidant and at least one nitrogen-containing compound or salt thereof selected from a particular group of nitrogen-containing compounds and salts to form a biocide, and applying the biocide. Apparatus for practicing the methods are also provided.