Solid hollow fiber cooling crystallization systems and methods
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-011/00
B01D-061/00
C02F-005/00
출원번호
UP-0114315
(2008-05-02)
등록번호
US-7754083
(2010-08-02)
발명자
/ 주소
Sirkar, Kamalesh K.
Zarkadas, Dimitrios
출원인 / 주소
New Jersey Institute of Technology
대리인 / 주소
McCarter & English, LLP
인용정보
피인용 횟수 :
0인용 특허 :
12
초록▼
A solid hollow fiber cooling crystallizer and method for crystallizing aqueous and organic solutions are provided. The solid hollow fiber crystallizer (SHFC) for carrying out cooling crystallization of inorganic/organic microsolutes/macrosolutes from solution generally includes a bundle of non-porou
A solid hollow fiber cooling crystallizer and method for crystallizing aqueous and organic solutions are provided. The solid hollow fiber crystallizer (SHFC) for carrying out cooling crystallization of inorganic/organic microsolutes/macrosolutes from solution generally includes a bundle of non-porous hollow fibers mounted within a shell where a feed solution for crystallization flows through the lumen side of the hollow fibers and a cooling solution flows through the shell side to form nuclei and subsequently crystals in the feed solution at a temperature below its saturation temperature. The solid hollow fiber crystallizer may be combined with a mixing device, such as a completely stirred tank or static mixer, to further effectuate crystallization. The solid hollow fiber crystallizer may be operated in a number of modes including feed recycle mode, once through mode, SHFC-in-line static mixer in series mode, and SHFC-CST in series mode. The advantages of solid hollow fiber cooling crystallization in comparison to conventional crystallization processes include improved temperature control between crystallizing solution and coolant, higher nucleation rates, improved control of crystal size and crystal size distribution, smaller crystal size, capability for decoupling crystal nucleation and crystal growth, decreased fouling of process equipment, and improved process scale-up.
대표청구항▼
The invention claimed is: 1. A method of forming nuclei and subsequently crystals in a feed solution, comprising the steps of: a) conveying said feed solution into a solid hollow fiber crystallizer (SHFC) system, said solid hollow fiber crystallizer system including a plurality of non-porous hollow
The invention claimed is: 1. A method of forming nuclei and subsequently crystals in a feed solution, comprising the steps of: a) conveying said feed solution into a solid hollow fiber crystallizer (SHFC) system, said solid hollow fiber crystallizer system including a plurality of non-porous hollow fibers mounted within a shell and said feed solution being conveyed to either a lumen side or a shell side of said plurality of non-porous hollow fibers; b) conveying a cooling solution into said solid hollow fiber crystallizer, said cooling solution being conveyed to an opposite side of said plurality of non-porous hollow fibers as compared to said feed solution; c) cooling said feed solution below its saturation temperature to form nuclei and crystals; and d) conveying said cooled feed solution into a mixing device. 2. The method of claim 1, further comprising the steps of: a) controlling crystal size distribution in said cooled feed solution within said mixing device, b) conveying a cooled feed solution from said mixing device, and c) filtering nuclei and crystals from said cooled feed solution. 3. The method of claim 1, wherein the mixing device is selected from the group consisting of a completely stirred tank and an in-line static mixer. 4. The method of claim 1, wherein said solid hollow fiber crystallizer (SHFC) system is effective to cause crystal nucleation, and said mixing device is effective to cause crystal growth. 5. The method of claim 1, wherein said feed solution is selected from the group consisting of an aqueous solution and an organic solution. 6. The method of claim 1, wherein said feed solution includes an inorganic or organic solute. 7. The method of claim 1, wherein said feed solution includes at least one of microsolutes and macrosolutes. 8. The method of claim 1, further comprising the step of subjecting said feed solution that contains nuclei and crystals to filtration. 9. The method of claim 1, further comprising the step of recycling said cooled feed solution back through said solid hollow fiber crystallizer system. 10. The method of claim 1, wherein said hollow fiber crystallizer system comprises a bundle of non-porous polymeric or ceramic hollow fibers mounted within said shell. 11. The method of claim 10, wherein said hollow fiber crystallizer system includes a bundle of non-porous hollow fibers fabricated from a polymeric material selected from the group consisting of polypropylene, polyethersulfone (PES), polyetheretherketone (PEEK), a polyimide, polyphenyl sulfide (PPS), polyethylene, polytetrafluoroethylene (PTFE), polysulfone (PS) and poly-4-methyl-1-pentene (PMP). 12. The method of claim 10, wherein said hollow fiber crystallizer system includes a bundle of non-porous hollow fibers fabricated from a ceramic material selected from the group consisting of alumina, silica and glass. 13. The method of claim 1, wherein a temperature difference between said feed solution temperature and said chilled cooling solution is less than or equal to 2° C. 14. The method of claim 1, wherein said plurality of hollow fibers is oriented in a helix within said shell. 15. The method of claim 1, wherein said feed solution includes seed crystals and wherein said solid hollow fiber crystallizer (SHFC) system is effective to grow said seed crystals.
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