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A kind of deesterification distillation process of aged naphthenic acid extractant

A naphthenic acid and extractant technology, applied in the field of deesterification distillation process, can solve the problems of difficult adjustment, complicated control and high energy consumption, and achieve the effects of recovering the extraction function, high conversion rate and eliminating emissions

Active Publication Date: 2022-07-22
鞍山昊旻稀土科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, for the existing distillation device, since the heating, distillation, condensation and cooling of the still liquid are all carried out separately, and the condensation and cooling process is realized by circulating water, there are complex control, Due to the shortcomings of difficult adjustment and high energy consumption, the present invention also provides a distillation device adapted to the aging naphthenic acid extractant deesterification distillation process, which realizes the integration of heating, distillation, condensation and still liquid cooling of the distillate. Directly use the heat released by condensation and cooling to heat the raw materials

Method used

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  • A kind of deesterification distillation process of aged naphthenic acid extractant
  • A kind of deesterification distillation process of aged naphthenic acid extractant

Examples

Experimental program
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Effect test

Embodiment 1

[0029] see figure 1 , a de-esterification distillation process of an aging naphthenic acid extractant, comprising the following steps:

[0030] S1, hydrolysis: take 1500L of aging naphthenic acid extractant and place it in a 2000L electric heating reactor, turn on the stirrer, rotate at 80 rpm, heat to 80°C, add 52 kg of granular sodium hydroxide, add 11 L of deionized water , and the reaction was stirred for 4 hours;

[0031] S2, neutralization: complete the hydrolyzate of step 1, cool to 40 ℃, keep the previous stirring state, slowly drip 217L of hydrochloric acid with a concentration of 6mol / L, the reaction time is 30 minutes, stop stirring after the reaction, and let stand for 30 minutes , the still liquid is divided into an organic phase and an aqueous phase, and the deesterification liquid of the aging naphthenic acid extractant is obtained after cutting out the aqueous phase;

[0032] S3, underpressure distillation: the deesterification liquid that completes step 2 en...

Embodiment 2

[0039] see figure 2, a distillation device suitable for the deesterification distillation process of aging naphthenic acid extractant, comprising an electric heating still 1, the electric heating still 1 comprises a still 11, the bottom of the still 11 is covered with an electric heating jacket 12, and the still One side of 11 is connected with a liquid communication pipe 13, the top of the still 11 is connected with a distillation vapor communication pipe 14, the bottom of the still 11 is provided with a still liquid outlet 15, and one side of the still liquid outlet 15 is connected with The still liquid communication pipe 16, the bottom of the still liquid outlet 15 is connected with the still liquid venting pipe 17, the electric heating jacket 12 is energized for heating and distillation, the de-esterification liquid inside 11, the vapor evaporated in the de-esterifying liquid passes through the distillation steam. The body communication pipe 14 enters the upper space of t...

Embodiment 3

[0041] see figure 2 , a distillation device suitable for the deesterification and distillation process of the aging naphthenic acid extractant, comprising an electric heating still 1 and an economizer 2, the economizer 2 is fixedly connected to one side of the electric heating still 1, and the The heater 2 includes an economizer housing 21, the top of the economizer housing 21 is connected with a distillation gas communication pipe 14, the inner wall of the economizer housing 21 is welded with a conical partition 22, and the economizer housing 21 A serpentine condensing heat exchange coil 23 is fixedly connected to the inner top of the heat exchanger, a liquid communication pipe 13 is connected to the top of the serpentine condensation heat exchange coil 23, and a serpentine cooling heat exchange plate is fixedly connected to the inner bottom of the economizer shell 21 Tube 24, the bottom of the serpentine cooling heat exchange coil 24 is connected with the still liquid commu...

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Abstract

The invention provides a deesterification distillation process of an aged naphthenic acid extractant, which relates to the technical field of rare earth separation. The deesterification and distillation process of the aged naphthenic acid extractant can completely hydrolyze isooctyl naphthenate in the aged naphthenic acid extractant into naphthenic acid and isooctanol, and simultaneously remove harmful substances such as asphalt colloid, etc. A high-quality naphthenic acid extractant is obtained, and the specific steps are: S1, hydrolysis of the aged naphthenic acid extractant to obtain a hydrolyzed solution of the aged naphthenic acid extractant; S2, neutralization of the hydrolyzed solution to obtain an aged naphthenic acid extractant S3, the distillation of the deesterified solution to obtain a new naphthenic acid extractant. At the same time, for the existing distillation device, there are disadvantages such as complicated control, difficult adjustment, high energy consumption, etc. The present invention also provides a distillation device suitable for the distillation process of deesterification of an aging naphthenic acid extractant. The device includes an electric heating The distillation still and the economizer realize the integration of the heating, distillation, condensation and still liquid cooling of the distillate, and directly use the heat released by the condensation and cooling to heat the raw materials. The device has the advantages of simple control, flexible adjustment, high distillation efficiency, and remarkable energy saving effect.

Description

technical field [0001] The invention relates to the technical field of rare earth separation, in particular to a deesterification distillation process of an aging naphthenic acid extractant. Background technique [0002] The rare earth separation industry usually uses naphthenic acid extractant to separate heavy rare earth yttrium. The naphthenic acid extractant is composed of naphthenic acid, isooctanol and sulfonated kerosene. The naphthenic acid extractant will gradually age during long-term use, because the naphthenic acid and isooctanol will undergo esterification under acidic conditions to form isooctyl naphthenate, and the sulfonated kerosene will also be under oxidative conditions. The formation of harmful substances such as asphalt colloid, the continuous increase of isooctyl naphthenate and the harmful substances make the viscosity of the naphthenic acid extractant continue to increase, and the phase separation is difficult, which eventually causes the naphthenic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/00B01D3/02B01D11/02
CPCB01D3/02B01D3/009B01D11/0292
Inventor 金少玲孟凡志
Owner 鞍山昊旻稀土科技有限公司
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