IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0859937
(2001-05-17)
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발명자
/ 주소 |
- Tarbet, Bryon J.
- Bruening, Ronald L.
- Di Leo, Anthony J.
- Goddard, Philip M.
- Scarmoutzos, Louis M.
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출원인 / 주소 |
- Mykrolis Corporation, IBC Advanced Technologies, Inc.
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대리인 / 주소 |
Hamilton, Brook, Smith & Reynolds, P.C.
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인용정보 |
피인용 횟수 :
6 인용 특허 :
22 |
초록
▼
A method for removing, separating, and concentrating certain selected ions from a source solution that may contain larger concentrations of other ions comprises bringing the source solution in contact with a composition comprising an ion-binding ligand covalently bonded to a membrane having hydrophi
A method for removing, separating, and concentrating certain selected ions from a source solution that may contain larger concentrations of other ions comprises bringing the source solution in contact with a composition comprising an ion-binding ligand covalently bonded to a membrane having hydrophilic surface properties. The ligand portion of the composition has affinity for and forms a complex with the selected ions, thereby removing them from the source solution. The selected ions are then removed from the composition through contact with a much smaller volume of a receiving solution in which the selected ions are either soluble or which has greater affinity for the selected ions than does the ligand portion of the composition, thereby quantitatively stripping the complexed ions from the ligand and recovering them in concentrated form in the receiving solution. The concentrated ions thus removed may be further separated and recovered by known methods. The process if useful in the removal of selected ions, including noble metals and other transition metals from a variety of source solutions such as are encountered in semiconductor, nuclear waste cleanup, metals refining, environmental cleanup, providing ultra high purity fluids, electric power, and other industrial enterprises. The invention is also drawn to the ligand-membrane compositions.
대표청구항
▼
A method for removing, separating, and concentrating certain selected ions from a source solution that may contain larger concentrations of other ions comprises bringing the source solution in contact with a composition comprising an ion-binding ligand covalently bonded to a membrane having hydrophi
A method for removing, separating, and concentrating certain selected ions from a source solution that may contain larger concentrations of other ions comprises bringing the source solution in contact with a composition comprising an ion-binding ligand covalently bonded to a membrane having hydrophilic surface properties. The ligand portion of the composition has affinity for and forms a complex with the selected ions, thereby removing them from the source solution. The selected ions are then removed from the composition through contact with a much smaller volume of a receiving solution in which the selected ions are either soluble or which has greater affinity for the selected ions than does the ligand portion of the composition, thereby quantitatively stripping the complexed ions from the ligand and recovering them in concentrated form in the receiving solution. The concentrated ions thus removed may be further separated and recovered by known methods. The process if useful in the removal of selected ions, including noble metals and other transition metals from a variety of source solutions such as are encountered in semiconductor, nuclear waste cleanup, metals refining, environmental cleanup, providing ultra high purity fluids, electric power, and other industrial enterprises. The invention is also drawn to the ligand-membrane compositions. at two places along the axial direction on the inner surface of the work piece facing the two groove sets; and wherein: the fluid bearing manufacturing tool is comprised of a main body which is made of an electrode part; the mask member provided with at least two groove sets is tightly interposed between the work piece and the electrode part of the manufacturing tool in such a manner that the work piece and the electrode part are directly opposed to each other only in positions of the plurality of grooves provided with the mask member; and the main body of the manufacturing tool has a solution passage to allow the electrolytic solution to flow to the respective grooves and the electrolytic solution performs an electrolytic action only in the shape of the plurality of grooves. 2. A method for manufacturing a fluid bearing according to claim 1, further comprising the steps of; forming an electrolytic solution pathway inside the electrode section of the manufacturing tool to allow the electrolytic solution to branch out and flow to the groove sets at two places in the mask member; adhering the mask member closely to an inner circumference surface of the work piece; and flowing the electrolytic solution only to the grooves in the mask member to form fluid bearing grooves on the inner surface of the work piece facing the groove sets. 3. A method for manufacturing a fluid bearing according to claim 2, further comprising the step of providing the electrode section of the manufacturing tool with two groove forming surfaces along the axial direction where the mask member is attached, the two groove forming surfaces defining an angle θ against the axial direction, where the angle θ is 0°≤θ≤90°. 4. A method for manufacturing a fluid bearing according to claim 3, wherein the angle θ is 0° and the two groove forming surfaces on the work piece are provided with two sets of radial bearing grooves along the axial direction of the manufacturing tool. 5. A method for manufacturing a fluid bearing according to claim 2, wherein the electrolytic solution pathway formed within the electrode section of the manufacturing tool has a central electrolytic solution pathway formed along the axial direction in a center of the electrode section and a plurality of holes extending from the central electrolytic solution pathway in a radial direction toward an outer circumference of the manufacturing tool between the two groove sets in the mask member, the plurality of holes communicating with the grooves in the mask member at two places along the axial direction. 6. A method for manufacturing a fluid bearing according to claim 1, wherein the work piece is made of a conductive material and the electrode section of the manufacturing tool are connected to a direct current pulse power source so that the work piece is set at a positive pole and the electrode section of the manufacturing tool is set at a negative pole, and the electrolytic solution is allowed to flow from the interior of the electrode section through the outer circumference of the electrode section to an exterior thereof. 7. A method for manufacturing a fluid bearing, in which a fluid bearing manufacturing tool is inserted into a hole created in a work piece and electrolytic solution is allowed to flow between the manufacturing tool and the work piece, and a power source for electrolytic machining is connected between the manufacturing tool and the work piece, to form fluid bearing grooves on an inner surface of the work piece through electrolytic machining, the method comprising the steps of: affixing a mask member with at least two grove sets, each of the two groove sets consisting of a plurality of grooves in a shape corresponding to the fluid bearing grooves, in at least two places along an axial direction on an outer surface of an electrode section of the manufacturing tool to which the power source for electrolytic machining is connected; flowing the electrolytic so
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