[특허]Zirconium phosphate and method of making the same

[미국특허] Zirconium phosphate and method of making the same 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C01B-025/37
출원번호	US-0629962 (2003-07-30)
발명자 / 주소	Wong, Raymond J.
출원인 / 주소	Renal Solutions, Inc.
대리인 / 주소	Kilyk & Bowersox, P.L.L.C.
인용정보	피인용 횟수 : 79 인용 특허 : 65

초록 ▼

A method of making sodium zirconium carbonate is described which involves forming a mixture of zirconium oxychloride with soda ash and then heating at a sufficient temperature and for a sufficient time to form the sodium zirconium carbonate. Subsequent washing and filtration steps can further form parts of this process. A novel sodium zirconium carbonate is further described which contains from about 2 wt % to about 5 wt % Na+; from about 44 wt % to about 50 wt % ZrO 2 ; from about 12 wt % to about 18 wt % CO 3 2− ; and from about 32 wt % to about 35 wt % H 2 O. Methods of making zirconium basic carbonate are further described which involve titrating an aqueous slurry of sodium zirconium carbonate to a pH of from about 3.5 to about 4.0 with an acidic agent wherein the sodium zirconium carbonate has a moisture content of from about 15% to about 25% LOD in solid form. The process further involves washing the aqueous slurry containing the formed zirconium basic carbonate with water. A novel zirconium basic carbonate is further disclosed which has a minimum adsorption capacity of from about 30 to about 35 mg/PO 4 -P/gm SCZ; a minimum HCO 3 − content of from about 2 to about 4 mEq HCO 3 -gm/SCZ; a leachable Na + content of from about 1.5 to about 2.0 mEq Na + /gm SCZ; and/or a pH range of titrated sodium zirconium carbonate of from about 6 to about 7. A method of making zirconium phosphate is also disclosed which involves treating sodium zirconium carbonate with caustic soda to from an alkaline hydrous zirconium oxide which is subsequently heated and mixed with phosphoric acid to obtain an acid zirconium phosphate which can be titrated with caustic soda to achieve the desired zirconium phosphate. Novel zirconium phosphates are also disclosed as well as uses for the above zirconium containing materials.

대표청구항 ▼

1. A method of making zirconium phosphate comprising treating sodium zirconium carbonate with caustic soda to form alkaline hydrous zirconium oxide;heating a slurry comprising said alkaline hydrous zirconium oxide and adding phosphoric acid; andrecovering an acid zirconium phosphate. 2. The method of claim 1, further comprising titrating an aqueous slurry of said acid zirconium phosphate with caustic soda to obtain a pH of from about 5 to about 6 and;recovering said titrated zirconium phosphate. 3. The method of claim 2, further comprising filtering said titrated zirconium phosphate and washing the filtered zirconium phosphate. 4. The method of claim 3, further comprising drying said zirconium phosphate to obtain a free flowing powder. 5. The method of claim 4, wherein said zirconium phosphate has a moisture level of from about 12% to about 18% LOD. 6. The method of claim 3, wherein said the washing of the titrated zirconium phosphate is with RO water sufficient to obtain a 300 ppm or less Total Dissolved Solid and minimize leachable Na + . 7. The method of claim 2, wherein said caustic soda is a 50% caustic soda. 8. The method of claim 1, wherein said heating is at a temperature of from about 180° F. to about 185° F. for one hour. 9. The method of claim 1, wherein said sodium zirconium carbonate is obtained from heating zirconium oxychloride with soda ash at a sufficient temperature and for a sufficient time to form the sodium zirconium carbonate. 10. The method of claim 9, wherein said heating of zirconium oxychloride is at a temperature of from about 150° F. to about 250° F. 11. The method of claim 9, further comprising, after heating of the zirconium oxychloride with soda ash to form the sodium zirconium carbonate, filtering off and washing said sodium zirconium carbonate to remove any chloride or impurities from said sodium zirconium carbonate. 12. A zirconium phosphate having a Na + wt % of from about 4 wt % to about 6 wt %;a ZrO 2 wt % of from about 34 wt % to about 37 wt %;a PO 4 wt % of from about 41 wt % to about 43 wt %; anda H 2 O wt % of from about 14 wt % to about 18 wt %, based on the weight of the zirconium phosphate. 13. The zirconium phosphate of claim 12, wherein said zirconium phosphate has at least one of the following characteristics:a) an adsorption capacity for ammonia of from about 30 mg NH 4 − N/gm ZrP to about 35 mg NH 4 − N/gm ZrP;an adsorption capacity for Ca 2+ of from about 3 mEq Ca 2+ /gm ZrP to about 5 mEq Ca 2+ /gm ZrP;an adsorption capacity for Mg 2+ of from about 2 mEq Mg 2+ /gm ZrP to about 3 mEq Mg 2+ /gm ZrP; andan adsorption capacity for toxic heavy metals of from about 5 mEq HM/gm ZrP to about 7 mEq HM/gm ZrP;b) a Na + content of from about 2 mEq Na + /gm ZrP to about 3 mEq Na + /gm ZrP at a pH of from about 5.75 to about 6;c) a minimum leachable PO 4 3− of less than about 0.05 mg PO 4 3− /gm ZrP; ord) satisfying ANSI/AAMI RD-5-1992 standard on extractable toxic impurities. 14. The zirconium phosphate of claim 12, wherein said zirconium phosphate has no residual sulfate or chloride. 15. The zirconium phosphate of claim 12, wherein said zirconium phosphate has less than 0.01% sulfate, chloride, or both. 16. The zirconium phosphate of claim 12, wherein said zirconium phosphate is H 2 O has a pH of from about 6 to about 7. 17. The zirconium phosphate of claim 12, wherein said zirconium phosphate has an average grain size of from about 30 to about 40 microns.

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Wong, Raymond June-Hin, Zirconium phosphate particles having improved adsorption capacity and method of synthesizing the same.
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Wong, Raymond June-Hin, Zirconium phosphate particles having improved adsorption capacity and method of synthesizing the same.
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Pudil, Bryant J.; Meyer, Thomas E.; Lura, David B.; Gerber, Martin T., pH buffer measurement system for hemodialysis systems.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

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