Process and device for rectifying and separating stable isotope 13C at low temperature by adopting CO

A stable isotope, low temperature rectification technology, applied in the separation of different isotopic elements, separation methods, dispersed particle separation, etc., can solve the problems of difficult isotope products, high consumption of cold energy, high production cost, and overcome the slow reaction speed, The effect of avoiding equipment failure and low production cost

Active Publication Date: 2012-03-21
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] From this it can be seen that the existing 13 C low-temperature rectification production technology has the disadvantages of high equipment, high cooling energy consumption, and difficulty in reaching 99% of isotope products, resulting in high production costs.

Method used

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  • Process and device for rectifying and separating stable isotope 13C at low temperature by adopting CO
  • Process and device for rectifying and separating stable isotope 13C at low temperature by adopting CO
  • Process and device for rectifying and separating stable isotope 13C at low temperature by adopting CO

Examples

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Effect test

Embodiment 1

[0039] Four low-temperature rectification towers are used as the first stage rectification tower 1, the second stage rectification tower 2, the third stage rectification tower 3, and the fourth stage rectification tower 4 to form a horizontal four-stage cascade production 13 C, such as figure 2 As shown, the rectification tower is 30 meters high, and the tower diameters are 390, 200, 90, and 45 mm respectively. The tower is filled with stainless steel wire mesh corrugated structured packing 18, and the production capacity is 99% of the annual output of 100 kg. 13 C, see Table 1 for specific parameters. The high-purity raw material CO is fed from the feed port through the regulating valve 11, the flow rate is 6366 mol / day, the gas phase in the tower flows to the top condenser 16, and the condensate 13 flows back into the first-stage rectifying tower 1 as a spray liquid; another part of the tower top gas 14 is discharged and sold as a chemical raw material, and the liquid CO i...

Embodiment 2

[0045] Four low-temperature rectification towers are used as the first stage rectification tower 1, the second stage rectification tower 2, the third stage rectification tower 3, and the fourth stage rectification tower 4 to form a horizontal four-stage cascade production 13 C, such as Figure 5 As shown, the rectification tower is 30 meters high, and the tower diameters are 390, 200, 90, and 45 mm in turn. The production capacity is 99% of the annual output of 100 kg 13 c. The high-purity raw material CO is fed from the feed port through the regulating valve 11, and the flow rate is 6366 mol / day. The gas phase in the tower flows to the top condenser 16, and the condensate 13 flows back into the tower as a spray liquid; the other part of the top gas 14 is discharged and sold as chemical raw materials. The liquid CO in the tower flows from the packing surface to the tower bottom 17 and is heated and vaporized. Part of it flows upward in the packing space in the tower and exc...

Embodiment 3

[0048] A process and device for separating stable isotope 13C by low-temperature rectification of CO, the structure of which is as follows figure 1 As shown, the separation system is cryogenic rectification tower 1, cryogenic rectification tower N, structured packing 18, condenser 16, condenser N6, reboiler 12, reboiler N2, isotope scrambler IS, liquid nitrogen circulation system The cascading towers formed, the cascading method adopts the horizontal multi-tower cascading without power transmission, which is realized in the isotope scrambler 13 C 16 O and 12 C 18 O isotope conversion, rectification to get 99% 13 C product.

[0049] There is no power transmission equipment between the cascading towers, the gas phase at the bottom of the former tower flows to the top of the latter tower under the push of the pressure difference, and is used as the spray liquid of the latter tower after being condensed, and the CO vapor at the top of the latter tower is condensed Under the ...

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Abstract

The invention relates to a process and a device for rectifying and separating stable isotope 13C at low temperature by adopting CO. The device adopts a cascaded tower consisting of a low-temperature rectifying tower, regular packing, a condenser, a reboiler, an isotope frequency scrambler and a liquid nitrogen circulating system; the device adopts an unpowered conveying horizontal cascade mode; and after rectified through the rectifying tower, part of high-purity CO is used as tower top spray liquor, and the other part of the high-purity CO enters the rectifying towers of the next stage and then is converted through the isotope frequency scrambler, so as to realize the isotope conversion of 13C16O and 12C18O. The invention provides a production method which has the advantages that the process is simple, the production cost is low, 99 percent of stable isotope 13C can be obtained at one step, the energy consumption is saved, the disadvantage of suspend production of a device caused by equipment failure can also be avoided, the adopted horizontal cascade and the selected ripple regular packing reduce the engineering roadblock caused by a conventional technology which blindly seeks height, and overcome the default of rank poison of a traditional chemical method and the disadvantages of low reaction rate and low production capacity.

Description

technical field [0001] The present invention relates to a kind of separated stable isotope 13 Process and device of C, especially involving the separation of stable isotopes by low-temperature rectification of CO 13 C process and device. Background technique [0002] In the prior art, there are processes and devices for separating the stable isotope 13C by low-temperature rectification of CO. [0003] In 1947, Eastman Kodak Company of the United States adopted the highly toxic HCN / NaCN chemical exchange method (Clyde A.Hutchison, David W.Stewart, Harold C.Urey, the concentration of 13 C, Journal of chemical physics, Vol.8, 1940, 532-537), semi-industrial production 65% 13 C, was later ordered to close. [0004] In the 1960s, the United States used CH 4 Production by thermal diffusion 13 C (W.M.Rutherford, J.M.Keller, Preparation of highly enriched carbon-13 by thermal diffusion of methane, the journal of chemical physics, Vol.44, No.2, 1966, 723); Replaced by CO cryog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D59/04F25J3/02
Inventor 李虎林袁家均龙磊李良君吉永喆许保云蔡扬
Owner SHANGHAI RES INST OF CHEM IND
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