Method and unit for continuously producing metal microparticle
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C22B-003/02
C22B-003/00
출원번호
US-0975377
(2004-10-29)
등록번호
US-7470391
(2008-12-30)
우선권정보
JP-2003-368899(2003-10-29)
발명자
/ 주소
Shiraishi,Fumiko
Ichikawa,Yasunori
Waki,Koukichi
Sugiyama,Seiji
출원인 / 주소
FUJIFILM Corporation
대리인 / 주소
Sughrue Mion, PLLC
인용정보
피인용 횟수 :
0인용 특허 :
5
초록▼
The producing unit for continuously producing metal microparticles formed of a multicomponent alloy accompanied by the generation of a byproduct gas through an early reaction of the formation of the metal particles comprises a first mixing unit for continuously supplying and mixing a plurality of so
The producing unit for continuously producing metal microparticles formed of a multicomponent alloy accompanied by the generation of a byproduct gas through an early reaction of the formation of the metal particles comprises a first mixing unit for continuously supplying and mixing a plurality of solutions for conducting the early reaction, a second mixing unit for continuously supplying another solution to the reaction liquid containing the metal microparticles formed in the early reaction and for mixing the two solutions, to introduce dissimilar metal atoms into the crystal lattices of the metal microparticles, and a gas-liquid separation unit that is installed in a midway of the pipe which is made so as to have enough length to finish the early reaction, and which continuously passes the reaction liquid to the second mixing unit from the first mixing unit, and that continuously removes the byproduct gas generated with the proceeding of the early reaction.
대표청구항▼
What is claimed is: 1. A producing unit for continuously producing metal microparticles formed of a multicomponent alloy accompanied by the generation of a byproduct gas through an early reaction of the formation of the metal particles, comprising: a first mixing unit for continuously supplying and
What is claimed is: 1. A producing unit for continuously producing metal microparticles formed of a multicomponent alloy accompanied by the generation of a byproduct gas through an early reaction of the formation of the metal particles, comprising: a first mixing unit for continuously supplying and mixing at least a first solution and a second solution for conducting an early reaction and forming a reaction liquid containing metal microparticles; a second mixing unit for continuously supplying third solution to the reaction liquid and for mixing the third solution and the reaction liquid to introduce dissimilar metal atoms into the crystal lattices of the metal microparticles and to form a mixed solution; a pipe connecting the first mixing unit and the second mixing unit; and a gas-liquid separation unit installed in a midway position of the pipe, wherein the pipe is made so as to have enough length to finish the early reaction, continuously passes the reaction liquid to the second mixing unit from the first mixing unit, and continuously removes a byproduct gas generated as the early reaction proceeds. 2. The producing unit for continuously producing metal microparticles according to claim 1, wherein the first solution contains two or more metal ions selected from the group consisting of families 8, 9 and 10 in the periodic table, the second solution contains a reducing agent; and the third solution contains one or more metal ions selected from the group consisting of families 11, 12, 13, 14 and 15 in the periodic table. 3. The producing unit for continuously producing metal microparticles according to claim 1, wherein at least one of the first and the second mixing units is a high-speed stirring and mixing unit that has stirring blades of which the tips rotate at a rotational peripheral velocity of 5 m/second or higher inside a mixing tank which has such a narrow volume as has the retention time of 10 seconds or shorter, and that instantly and uniformly mixes the solutions and immediately discharges the reaction liquid or the mixed solution from the mixing tank. 4. The producing unit for continuously producing metal microparticles according to claim 1, wherein at least one of the first and the second mixing units is a narrow-gap mixing unit which conducts mixing with a narrow-gap formed between the inner wall of a mixing vessel and a stirring member rotating at a high speed in the mixing vessel, and which, in order to form the narrow-gap, has a distance between the rotation center of the stirring member and the inner wall closest therefrom set in a range of 1.001 to 1.200 when the distance between the rotation center of the stirring member and the tip is defined as 1, and which instantly and uniformly mixes the solutions and immediately discharges the reaction liquid or the mixed solution from the mixing vessel. 5. The producing unit for continuously producing metal microparticles according claim 1, wherein at least one of the first and second mixing units is a high-pressure mixing unit which supplies at least one solution into a mixing chamber having a retention time of 5 seconds or shorter, in the form of a jet flow with a high pressure of 1 MPa or higher, and which instantly and uniformly mixes the solutions and immediately discharges the mixed solution or reaction liquid from the mixing chamber. 6. The producing unit for continuously producing metal microparticles according to claim 1, wherein the gas-liquid separation unit comprises: a gas-liquid separation structure which is connected to a midway position of the pipe, has a larger space than the pipe in terms of a volume per unit length, and has a gas-liquid interface formed when a reaction liquid flows through the space, and; a pressure adjustment device for adjusting the pressure of a headspace part above the gas-liquid interface, and wherein the gas-liquid separation unit continuously removes the byproduct gas contained in the reaction liquid by floatation, while the reaction liquid passes through the gas-liquid separation structure. 7. The producing unit for continuously producing metal microparticles according to claim 1, wherein the gas-liquid separation unit comprises: a convolute flow-producing tank which is connected to a midway position of the pipe, and produces a convolute flow in a reaction liquid; a convolute flow-speed adjustment device for making a real flow speed to be 2 m/second or higher, along with making the inflow speed of the reaction liquid flowing into the convolute flow-producing tank to be twice as large as or larger than the flow speed of the reaction liquid flowing through the pipe, and; a pressure adjustment device for adjusting a pressure in the convolute flow-producing tank, and wherein the gas-liquid separation unit continuously removes the byproduct gas from the reaction liquid by taking advantage of a centrifugal force generated by the convolute flow of the reaction liquid containing the byproduct gas having a different specific gravity from that of the reaction liquid. 8. The producing unit for continuously producing metal microparticles according to claim 1, wherein the gas-liquid separation unit comprises: a troughed spiral channel which is connected to a midway position of the pipe and has the upper part opened; a spiral channel tank housing the spiral channel; and a pressure adjustment device for adjusting the pressure in the spiral channel tank, and wherein the gas-liquid separation unit continuously removes the byproduct gas in the reaction liquid by floatation, while passing the reaction liquid downward through the spiral channel at the approximately same speed as the flow speed of the reaction liquid flowing in the pipe. 9. The producing unit for continuously producing metal microparticles according to claim 1, wherein, in order to control a reaction in the second mixing unit, a duration time necessary for the reaction liquid having flowed out from the first mixing unit to reach the second mixing unit through the gas-liquid separation unit is set. 10. The producing unit for continuously producing metal microparticles according to claim 9, wherein the duration time is set to one minute or longer but 20 minutes or shorter. 11. The producing unit for continuously producing metal microparticles according to claim 1, further comprising: a third mixing unit for adding a chelating agent solution and a reducing agent solution and mixing the solutions, which is installed in a stage after the second mixing unit or in a position between the gas-liquid separation unit and the second mixing unit.
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