Construction method based on technology for producing boron isotope by anisole-boron trifluoride

A technology of boron trifluoride and anisole, applied in the field of isotope separation, can solve the problems of low yield of boron-10, unable to obtain qualified products of boron-11 at the same time, etc., so as to improve separation efficiency, shorten start-up time and start-up time short effect

Active Publication Date: 2014-12-10
浙江创世雷博科技有限公司
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Problems solved by technology

Zhang Weijiang of Tianjin University simulated the start-up process with a computer, and proposed a start-up strategy of "cascade feeding, no discharge at the bottom of the tower, variable gas velocity, and maintaining impurity removal". However, the yield of boron-10 in this method is low, and the boron -11 is discharged as waste, and boron-11 qualified products cannot be obtained at the same time

Method used

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  • Construction method based on technology for producing boron isotope by anisole-boron trifluoride

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Embodiment Construction

[0022] The raw materials used are boron trifluoride gas (natural abundance, that is, boron-10 abundance of 19.3%) and anisole liquid, and the molar ratio of the boron trifluoride gas and anisole liquid is 1: 1;

[0023] With reference to the drawings, the equipment used includes complexing tower 1, first exchange rectification tower 2, second exchange rectification tower 3, complex stripping tower 4, complex cracking tower 5, anisole rectification Impurity removal tower 6, anisole drying tower 7, cold box 8, etc.;

[0024] The method is: the system is purged and replaced with nitrogen without residual moisture. Set the system pressure to 5Kpa(G) or 10Kpa(G) or 20Kpa(G) or 35Kpa(G) or 50Kpa(G) or 70Kpa(G) or 85Kpa(G), the suitable pressure is 10Kpa(G), the system uses Nitrogen press to maintain pressure. All storage tanks are sealed and protected with low pressure nitrogen and positive pressure to prevent the ingress of moist air.

[0025] Purify the raw material boron trifluoride...

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Abstract

The invention discloses a construction method based on a technology for producing boron isotope by anisole-boron trifluoride, which belongs to the field of isotope separation, and mainly aims at solving the problems such as low yield of boron-10 and incapability of obtaining qualified boron-11 products at the same time in the existing construction method based on the technology for producing boron isotope by anisole-boron trifluoride. The method disclosed by the invention comprises the following steps: continuously purifying raw materials, namely boron trifluoride gas and an anisole liquid, as well as an anisole-boron trifluoride complex before entering a cracking tower, nitrogen gas coming out of the top of a complex gas stripping tower, boron trifluoride gas after cracking, and gas coming out of the top of a first exchange rectifying tower; adding the purified nitrogen gas into a second exchange rectifying tower; adding fresh boron trifluoride gas into the first exchange rectifying tower, wherein boron-10 is not discharged out from the top of the cracking tower and boron-11 is not discharged out from the top of a complexation tower; and after performing system rectification balance for 72-148 hours, converting to the normal production mode. The method has the advantage that the two qualified products, namely boron trifluoride-10 and boron trifluoride-11 can be produced at the same time.

Description

Technical field: [0001] The invention belongs to the field of isotope separation, and specifically relates to a method for starting a production process of anisole-boron trifluoride complex chemical reaction rectification separation of boron isotope. Background technique: [0002] There are two stable isotopes of boron, boron-10 and boron-11, with natural abundances of 19.3% and 80.7%, respectively. Boron-10 has a very strong ability to absorb neutrons, and is increasingly used in nuclear power, modern industry, military equipment and medicine. Boron-11 is a potential thermonuclear reaction material, and the steel with boron-11 can greatly improve high temperature resistance and radiation resistance. At present, the high-abundance boron isotope products used in my country mainly rely on imports. There are three main methods of industrial production of boron isotopes in the world: ether-boron trifluoride vacuum exchange distillation method, methyl ether-boron trifluoride vacuum ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D59/50C01B35/06
Inventor 刘小秦王宏时天成
Owner 浙江创世雷博科技有限公司
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