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-0282290
(2002-10-28)
등록번호
US-8414932
(2013-04-09)
발명자
/ 주소
Nalepa, Christopher J.
Moore, Jr., Robert M.
출원인 / 주소
Albemarie Corporation
대리인 / 주소
Hoefling, Marcy M.
인용정보
피인용 횟수 :
0인용 특허 :
115
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 solid state bromine-containing biocidal composition formed by removal of the water from an aqueous solution or slurry of a product formed in water from (A) (i) bromine chloride, (ii) a mixture of bromine chloride and bromine, (iii) bromine and chlorine in a Br2 to Cl2 molar ratio of at least 1
1. A solid state bromine-containing biocidal composition formed by removal of the water from an aqueous solution or slurry of a product formed in water from (A) (i) bromine chloride, (ii) a mixture of bromine chloride and bromine, (iii) bromine and chlorine in a Br2 to Cl2 molar ratio of at least 1 or about 1, or (iv) bromine chloride, bromine, and chlorine in proportions such that the total Br2 to Cl2 molar ratio is at least 1 or about 1; and (B) (i) alkali metal salt of sulfamic acid and/or sulfamic acid, and (ii) alkali metal base, wherein said aqueous solution or slurry has a pH of at least 7 and an atom ratio of nitrogen to active bromine from (A) and (B) of greater than 0.93, wherein said composition is a spray-dried composition. 2. A composition of claim 1 wherein said pH is in the range of about 10 to about 13.5, and wherein said atom ratio is greater than 1. 3. A composition of claim 1 wherein said pH is in the range of about 12.5 to about 13.5. 4. A composition of claim 1 wherein said pH is in the range of about 12 to about 14. 5. A composition of any of claims 1-4 wherein the alkali metal of the alkali metal salt of sulfamic acid and of the alkali metal base is sodium or potassium. 6. A composition of any of claims 1-4 wherein the alkali metal of the alkali metal salt of sulfamic acid and of the alkali metal base is sodium. 7. An article of manufacture in the form of a package for use in oilfield or gasfield operations, said package comprising a container that dissolves or disintegrates in water and that contains a dissolved solid state bromine-containing biocidal composition of claim 1 whereby on coming into contact with downhole water in a well being serviced and/or (ii) a subterranean hole being drilled, the dissolving or disintegration of the container enables the downhole water and the biocidal composition to come in contact with each other and thereby provide biocidal activity to the downhole water. 8. An article of manufacture as in claim 7 wherein said solid state bromine-containing biocidal composition is (i) in the form of a powder or finely divided particles, or (ii) in the form of shapes comprised of agglomerated or compressed particles. 9. A process of forming a solid state bromine-containing biocidal composition, which process comprises removing the water from an aqueous solution or slurry of a product formed in water from (A) (i) bromine chloride, (ii) a mixture of bromine chloride and bromine, (iii) bromine and chlorine in a Br2 to Cl2 molar ratio of at least 1 or about 1, or (iv) bromine chloride, bromine, and chlorine in proportions such that the total Br2 to Cl2 molar ratio is at least 1 or about 1; and (B) (i) alkali metal salt of sulfamic acid and/or sulfamic acid, and (ii) alkali metal base, wherein said aqueous solution or slurry has a pH of at least 7 and an atom ratio of nitrogen to active bromine from (A) and (B) of greater than 0.93, wherein the water is removed from said aqueous solution or slurry by spray drying said aqueous solution or slurry. 10. A process of claim 9 wherein the water is removed from an aqueous slurry of a product formed in water from (A) and (B). 11. A process of claim 9 wherein the water is removed from an aqueous solution of a product formed in water from (A) and (B). 12. A process of claim 9 wherein said pH is in the range of about 12.5 to about 13.5. 13. A process of claim 9 wherein said pH is in the range of about 12 to about 13.5. 14. A process of forming a solid state bromine-containing biocidal composition, which process comprises removing the water from an aqueous solution or slurry of a product formed in water from (A) (i) bromine chloride, (ii) a mixture of bromine chloride and bromine, (iii) bromine and chlorine in a Br2 to Cl2 molar ratio of at least 1 or about 1, or (iv) bromine chloride, bromine, and chlorine in proportions such that the total Br2 to Cl2 molar ratio is at least 1 or about 1; and (B) (i) alkali metal salt of sulfamic acid and/or sulfamic acid, and (ii) alkali metal base, wherein said aqueous solution or slurry has a pH of at least 7 and an atom ratio of nitrogen to active bromine from (A) and (B) of greater than 0.93, and wherein the resultant product is dried by spray drying. 15. A process of any of claim 9, 10, 11, or 14 wherein the spray drying takes place (A) in the atmosphere of a spray drying zone, the temperature(s) of said atmosphere being in the range of about 20 to about 60° C. and wherein the average residence time of solids within a heated spray drying zone is kept within the range of about 1 to about 10 minutes; or(B) within a zone maintained at reduced pressure without application of heat. 16. A process as in claim 15 wherein said aqueous solution or slurry is sprayed in accordance with (A). 17. A process of claim 15 wherein said spray drying is conducted in accordance with (B).
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