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Tributyl phosphate organic phase regeneration treatment method

A technology of tributyl phosphate and a treatment method is applied in the treatment field of organic phase regeneration of tributyl phosphate, and can solve the problems of difficult control, affecting the separation of zirconium and hafnium, and difficulty in phase separation.

Inactive Publication Date: 2019-02-19
中核二七二铀业有限责任公司
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Problems solved by technology

[0002] TBP organic phase extraction is a kind of separation technology of zirconium and hafnium, but after TBP is stripped, a small part of zirconium (hafnium) remains in the TBP organic phase due to the balance, which will affect the circulation of TBP organic phase Use, it is easy to cause the concentration of zirconium in the raffinate to increase, thus affecting the separation of zirconium and hafnium
[0003] The existing technology is to use a certain concentration of lye for regeneration treatment, but this treatment method will cause precipitation, which is not easy to control, difficult to separate phases, and will easily cause the loss of the organic phase, and the removed zirconium (hafnium) will be trapped by TBP Organic phase, difficult to recycle

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  • Tributyl phosphate organic phase regeneration treatment method

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Embodiment Construction

[0040] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] Such as figure 1 As shown, a treatment method for the regeneration of the organic phase of tributyl phosphate of the present invention is applied to the regeneration of the organic phase of tributyl phosphate extracted and separated by zirconium and hafnium, comprising the following steps:

[0042] The first step: organic phase alkali washing to remove zirconium

[0043] After the organic phase of tributyl phosphate is used for the extraction and separation of zirconium and hafnium, a certain amount of zirconium remains, which affects the recycling of the organic phase;

[0044] Add the organic phase of tributyl phosphate with the problem of zirconium retention to the first stage of the zirconium removal section of the two-stage countercurrent contact mixing clarifier at a flow rate of 800L / h;

[0045] At th...

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Abstract

The invention belongs to the technical field of treatment methods of zirconium (hafnium) removal from a zirconium hafnium separation and extraction organic phase, and particularly relates to a tributyl phosphate organic phase regeneration treatment method. The method comprises the following steps that the organic phase is subjected to alkali washing to remove zirconium; alkali washing is carried out on residual liquid to recover zirconium; the organic phase is subjected to acid washing for regeneration; acid washing is carried out on the residual liquid for recycling; and the organic phase isused in a circulated manner. The method can completely remove zirconium (hafnium) and degradation products in the TBP organic phase obtained after back extraction treatment, and the zirconium (hafnium) content of the regenerated TBP organic phase is 30 mg / L or below, dibutyl phosphate is not detected, the requirement for recycling is met, and all the removed zirconium (hafnium) can be recovered, and no loss of products exists.

Description

technical field [0001] The invention belongs to the technical field of a treatment method for removing zirconium (hafnium) from an organic phase by separating and extracting zirconium and hafnium, and in particular relates to a treatment method for regenerating an organic phase of tributyl phosphate. Background technique [0002] TBP organic phase extraction is a kind of separation technology of zirconium and hafnium, but after TBP is stripped, a small part of zirconium (hafnium) remains in the TBP organic phase due to the balance, which will affect the circulation of TBP organic phase Use, it is easy to cause the concentration of zirconium in the raffinate to increase, thereby affecting the separation of zirconium and hafnium. [0003] The existing technology is to use a certain concentration of lye for regeneration treatment, but this treatment method will cause precipitation, which is not easy to control, difficult to separate phases, and will easily cause the loss of the...

Claims

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Application Information

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IPC IPC(8): C22B3/38C22B34/14
CPCC22B34/14C22B3/3846Y02P10/20
Inventor 龚道坤王英尹亮
Owner 中核二七二铀业有限责任公司
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