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Method for producing stable isotope of C-13 with chemical catalysis sorting by exchanging

A stable isotope and chemical catalysis technology, applied in the field of chemical catalytic exchange and separation of stable isotope 13C, can solve the problems of high energy consumption, high energy consumption and high cost, and achieve the effects of low energy consumption, high separation coefficient and small investment.

Inactive Publication Date: 2008-12-03
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The energy consumption of this method will be very huge, because the main problem of low temperature rectification is not solved, that is, how to reduce the problem of high energy consumption and high cost; after the tower diameter is enlarged, equipment processing, rectification working condition organization and heat maintenance involve many advanced technologies. Industrial Technology
Although it can be realized in theory, it will encounter great difficulties when enlarging the project

Method used

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  • Method for producing stable isotope of C-13 with chemical catalysis sorting by exchanging
  • Method for producing stable isotope of C-13 with chemical catalysis sorting by exchanging
  • Method for producing stable isotope of C-13 with chemical catalysis sorting by exchanging

Examples

Experimental program
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Effect test

Embodiment 1

[0073] The isotope separation experiment was carried out in a single column with a height of 10m and an inner diameter of 5cm. The separation system is CO 2 / monoethanolamine / 80% methanol+20% triethylamine, the amine concentration is 1mol / l, and the solvent is a mixed solution of monoethanolamine and triethylamine. The packing is Helipak 3013 stainless steel. Raw material CO 2 It enters the exchange tower from F, and performs gas-liquid exchange with the descending carbamate solution. CO in the absorber 2 It is absorbed by the amine solution and converted into carbamate, which flows into the exchange tower, and the rising CO 2 For gas-liquid countercurrent exchange, heavy components 13 C is concentrated in the liquid phase and enriched in the bottom of the exchange column, the product 13 CO 2 Take it out of the decomposition tower. After the carbamate flows into the decomposition tower 1, it is decomposed by heat, and the released CO 2 Ascending into the exchange towe...

Embodiment 2

[0077] Using CO 2 / di-n-butylamine / octane chemical exchange system for separation of stable isotopes 13 c. The isotope separation experiment was carried out in a single column with a height of 10m and an inner diameter of 5cm. The separation system is CO 2 / di-n-butylamine / octane, the concentration of di-n-butylamine is 1.5mol / l, and the solvent is octane. The filler is a stainless steel wire wound around a rectangular helical coil. Raw material CO 2 It enters the exchange tower from F, and performs gas-liquid exchange with the descending carbamate solution. CO in the absorber 2 It is absorbed by the amine solution and converted into carbamate, which flows into the exchange tower, and the rising CO 2 For gas-liquid countercurrent exchange, heavy components 13 C is concentrated in the liquid phase and enriched in the bottom of the exchange column, the product 13 CO 2 Take it out of the decomposition tower. After the carbamate flows into the decomposition tower 1, it ...

Embodiment 3

[0081] Using CO 2 / di-n-butylamine / octane chemical exchange system for separation of stable isotopes 13 c. The isotope separation experiment was carried out in a single column with a height of 15m and an inner diameter of 0.6m. The separation system is CO 2 / di-n-butylamine / octane, the concentration of di-n-butylamine is 1.5mol / l, and the solvent is octane. Filled with 80 mesh CY700 stainless steel wire mesh corrugated packing, wire diameter 0.16mm, tooth profile angle 90°, peak height 3.5mm, specific surface area 750m 2 / m 3 . Raw material CO 2 It enters the exchange tower from F, and performs gas-liquid exchange with the descending carbamate solution. CO in the absorber 2 It is absorbed by the amine solution and converted into carbamate, which flows into the exchange tower, and the rising CO 2 For gas-liquid countercurrent exchange, heavy components 13 C is concentrated in the liquid phase and enriched in the bottom of the exchange column, the product 13 CO 2 Tak...

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Abstract

The invention relates to a method for producing a stable isotope <13>C by adopting a chemical catalysis exchange method. The method adopts a CO2 / carbamate gas-liquid countercurrent chemical catalysis exchange system to perform chemical exchange and separation in a packing tower, wherein, a gas phase is the CO2, and a liquid phase is an amic organic solvent; the packing tower is regular packing or random high-efficiency packing; and a separating system realizes the separation of the stable isotope <13>C in a multi-tower concatenation connection. Compared with the prior art, the method has the characteristics of simple process, low production cost, normal-temperature normal-pressure operation and so on.

Description

technical field [0001] The invention relates to a precision separation process belonging to chemical unit operations, in particular to a stable isotope 13 C chemical catalytic exchange separation method. Background technique [0002] In the prior art, there are stable isotopes 13 C's production method. [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); , and later replaced by CO cryogenic distillation. [0005] In July 1969, the Los Alamos laboratory in the Unit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D59/32
Inventor 李虎林费孟浩李良君于国庆杨继群
Owner SHANGHAI RES INST OF CHEM IND
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