Active bromine containing biocidal compositions and their preparation
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A01N-039/00
A01N-059/02
A01N-059/08
A01N-059/00
출원번호
US-0793386
(2013-03-11)
등록번호
US-8679548
(2014-03-25)
발명자
/ 주소
Nalepa, Christopher J.
Moore, Jr., Robert M.
출원인 / 주소
Albemarle Corporation
대리인 / 주소
Hoefling, Marcy M.
인용정보
피인용 횟수 :
0인용 특허 :
114
초록▼
Described are highly concentrated liquid biocidal solutions formed in water from (a) specified bromine sources (e.g., BrCl or mixtures of BrCl and Br2) and (b) alkali metal salt of sulfamic acid and/or sulfamic acid and alkali metal base, wherein the solution contains 160,000 ppm of active bromine.
Described are highly concentrated liquid biocidal solutions formed in water from (a) specified bromine sources (e.g., BrCl or mixtures of BrCl and Br2) and (b) alkali metal salt of sulfamic acid and/or sulfamic acid and alkali metal base, wherein the solution contains 160,000 ppm of active bromine. Solutions of this type have been found to have greater stability than a commercially-available solution made from the same components containing 148,600 ppm of active bromine. Also described are new, water-soluble, solid state biocidal products formed by removing the water from solutions made in water from (a) and (b) irrespective of the initial concentration of active bromine. Removal of water can be accomplished by flashing or distillation at reduced pressure or preferably by spray drying. Such solid state products are typically in the form of powders or small particles, but can be compacted into larger forms preferably with the aid of one or more suitable binding agents.
대표청구항▼
1. A solids-free aqueous biocide composition comprising water having in solution therein an active bromine content derived from (i) bromine chloride or bromine chloride and bromine, with or without conjoint use of chlorine, in the range of about 201,000 ppm to about 215,000 ppm (wt/wt), and (ii) ove
1. A solids-free aqueous biocide composition comprising water having in solution therein an active bromine content derived from (i) bromine chloride or bromine chloride and bromine, with or without conjoint use of chlorine, in the range of about 201,000 ppm to about 215,000 ppm (wt/wt), and (ii) overbased alkali metal salt of sulfamic acid, wherein the relative proportions of (i) and (ii) are such that the atom ratio of nitrogen to active bromine from (i) and (ii) is greater than 0.93, and wherein the pH of the composition is at least 7. 2. A composition of claim 1 wherein said overbased alkali metal salt of sulfamic acid consists essentially of overbased sodium sulfamate and wherein said solution contains sodium chloride or sodium bromide, or both. 3. A composition of claim 1 wherein said atom ratio is greater than 1, and wherein said pH is in the range of about 10 to about 13.5. 4. A composition of claim 1 wherein said atom ratio is greater than 1, and wherein said pH is in the range of about 12.5 to about 13.5. 5. A composition of claim 1 wherein said atom ratio is greater than 1, and wherein said pH is in the range of about 12 to about 14. 6. A composition of claim 1 wherein said overbased alkali metal salt of sulfamic acid consists essentially of overbased sodium sulfamate, wherein said solution contains sodium chloride or sodium bromide, or both, wherein said atom ratio is greater than 1, and wherein said pH is in the range of about 10 to about 13.5. 7. A composition of claim 6 wherein said pH is in the range of about 12.5 to about 13.5. 8. A composition of claim 1 wherein the active bromine content thereof is derived from bromine chloride or bromine chloride and bromine. 9. A process of producing a solids-free biocidal composition, which process comprises mixing (i) bromine chloride or bromine chloride and bromine, with or without conjoint use of chlorine, with (ii) aqueous overbased solution of alkali metal salt of sulfamic acid in proportions such that the resultant product solution (a) contains in the range of about 201,000 ppm to about 215,000 ppm (wt/wt) of active bromine, (b) has an atom ratio of nitrogen to active bromine from (i) and (ii) that is greater than 0.93, and (c) has a pH of at least 7. 10. A process of claim 9 wherein said overbased alkali metal solution of alkali metal salt of sulfamic acid is preformed by mixing together in water, (1) sulfamic acid and/or an alkali metal salt of sulfamic acid, and (2) alkali metal base. 11. A process of claim 9 wherein said overbased alkali metal salt of sulfamic acid consists essentially of overbased sodium sulfamate. 12. A process of claim 9 wherein said atom ratio is greater than 1, and wherein said pH is in the range of about 10 to about 13.5. 13. A process of claim 9 wherein said atom ratio is greater than 1, and wherein said pH is in the range of about 12.5 to about 13.5. 14. A process of claim 9 wherein said atom ratio is greater than 1, and wherein said pH is in the range of about 12 to about 14. 15. A solids-free concentrated liquid biocide composition which comprises an aqueous solution of active bromine formed from (a) bromine chloride or a mixture of bromine chloride and bromine with (b) alkali metal salt of sulfamic acid and/or sulfamic acid, alkali metal base and water, or an aqueous solution of alkali metal salt of sulfamic acid formed from (1) alkali metal salt of sulfamic acid and/or sulfamic acid, (2) alkali metal base and (3) water, said aqueous solution of active bromine having a pH of at least about 7, and wherein the amounts of (a) and (b) are such that (i) the content of active bromine in the aqueous solution of active bromine is in the range of about 201,000 ppm to about 215,000 ppm (wt/wt) and (ii) the atom ratio of nitrogen to active bromine from (a) and (b) is greater than 1. 16. A composition of claim 15 wherein said pH is in the range of about 10 to about 13.5. 17. A composition of claim 16 wherein said pH is in the range of about 12.5 to about 13.5. 18. A composition of claim 16 wherein said pH is in the range of about 12 to about 14. 19. A composition of claim 15 wherein the alkali metal of the alkali metal salt of sulfamic acid and of the alkali metal base is sodium or potassium.
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