Three tower cascade connected, single tower accumulating, total refluxing and batch collecting alternative operating method for boron-10 separation
A technology of alternating operation and total reflux, applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of unfavorable separation, long production cycle, high pressure drop in the tower, etc., achieve shortened production cycle, easy operation, The effect of improving efficiency
Inactive Publication Date: 2009-02-04
TIANJIN UNIV
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The disadvantage of adopting this method is that the traditional multiple towers are connected in series to form an overall operating system, and the operations between the towers are mutually restricted. If there is a problem in the operation between some two towers in the system, it will affect the operation of the entire system, making The separation operation and control of the tower system are very difficult
Moreover, for a single tower, it is a partial reflux operation, which does not make full use of the tower efficiency, making the production cycle very long, and if the tower height is too high, the pressure drop in the tower will be too high, which is not conducive to separation
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[0010] The present invention is further described below in conjunction with accompanying drawing:
[0011] with (C 6 h 5 )OCH 3 ·BF 3 As a raw material (the mass ratio of boron-10 to boron-11 is 17.3:82.7), it is required to separate and prepare the stable isotope boron-10 with a product concentration of 85%. Three towers are connected in series, the volume of each tower is 10L, the volume of the storage tank connected to the top of the tower is 200ml, the tower height is 2.5m, the diameter is 19mm, and the tower is filled with Φ3*3 stainless steel Θ ring packing. Connect each tower to the corresponding storage tanks 1-4, 2-4, 3-4, evacuate from the top of the tower, and after the vacuum degree of each tower reaches 80KPa, feed 4000ml to each tower kettle at one time, each tower The temperature of the kettle is set at 170°C. After heating for 2 hours, the kettle liquid starts to boil, and the steam rises to the top of the tower. After being condensed by the condenser, the ...
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The invention discloses a method for separating boron-10, belonging to technology of stabilizing isotope element boron-10. The method comprises following steps: adding boron trifluoride complex compound into tower still with same amount under vacuum condition, heating for distillation; firstly, accumulating condensed fluid in container on top of tower; then, when the container is full, refluxing to tower from top of tower, after a spell of time, exchanging liquid material among towers and repeating above process; the product enriched in boron-10 is generated from the tower still of the first tower, and light component boron-11 is generated from tower top of the third tower. The invention is characterized by simple device, easy controllable process and high separation efficiency.
Description
technical field [0001] The invention relates to a method for separating boron-10 with three towers connected in series and single towers accumulating total reflux batch mining and alternate operation, which belongs to the separation technology of stable isotope boron-10. Background technique [0002] In nature, boron exists in the form of compounds of stable isotopes boron-10 and boron-11, and the natural abundance ratio of boron-10 to boron-11 is about 19.8:80.2. Boron-10 has been more and more widely used in modern industry and military equipment, and its application in medicine is also attracting more and more attention. [0003] At present, the boron isotope separation method used in industrial production is still dominated by chemical exchange distillation. The main principle of this method is that after one-time feeding to the tower kettle, the tower kettle is heated, the complex decomposes, and the steam flows from bottom to top. In the tower, a small part is discha...
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IPC IPC(8): B01D59/04
Inventor 白鹏吴军李晓峰郭宏杰
Owner TIANJIN UNIV