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Cerium dioxide chlorination device

A ceria and chlorination device technology, applied in rare earth metal chlorides, inorganic chemistry, rare earth metal compounds, etc., can solve the problems of unreported recyclable devices, increased waste disposal, and complicated equipment, etc. Good development and application prospects, high utilization rate, and the effect of less waste

Pending Publication Date: 2019-04-26
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, recyclable devices have not been reported
And, the reported rare earth oxide chlorination device volume is larger at present, and equipment is complicated, and a large amount of unreacted CCl 4 CO 2 , CO, Cl 2 and COCl 2 discharge as waste
This process not only consumes a large amount of CCl 4 , also increased the amount of waste to be treated

Method used

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Experimental program
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Effect test

Embodiment 1

[0030] Such as figure 1 As shown, a kind of ceria chlorination device that the embodiment of the present invention provides, comprises:

[0031] Reactor (reactor): Reactor 1 includes a reactor body and a lid, wherein the lid has a liquid inlet 1.1 and an air guide hole 1.2. The mouth of the draft tube of the liquid port is close to the bottom of the reaction kettle. Reactor 1 contains CCl inside 4 Liquid and CCl 4 The ceria solid loading device above the liquid, the ceria solid loading device is a conical crucible 2;

[0032] A heating unit, which selects a conventional electric resistance furnace 3, surrounds the outer surface of the reactor 1, and heats the reactor 1;

[0033] The condensing unit 4 includes a connected condenser 4.1 and a cooling circulating water machine 4.2. The cooling water enters from the lower hole of the condenser 4.1 and flows out from the upper hole. The condenser 4.1 is respectively provided with a first gas inlet 4.11 and a first gas-liquid o...

Embodiment 2

[0044] Such as figure 2 As shown, this embodiment is similar to Embodiment 1, and a temperature control unit is provided on the basis of Embodiment 1, including a temperature controller 12 and a thermocouple 13; Monitor the real-time temperature in Reactor 1. In addition, the above CCl 4 The liquid collection unit can also be connected with CCl through the one-way valve 14 4 The raw material supply unit (raw material tank 15) is communicated.

[0045] When the device of this embodiment is in use, after adding cerium dioxide into the conical crucible 2, each part of the chlorination device is figure 2 Install the connections inside the glove box. Liquid CCl in Reactor 1 4 After the resistance furnace 3 is heated to 500° C., it reacts with the ceria in the conical crucible 2 in the reaction kettle 1 . Gaseous reaction products and some CCl 4 Into the gas duct of reactor 1, part of the gaseous CCl in the gas duct 4 After cooling in the pipeline, it becomes liquid and pa...

Embodiment 3

[0048] Such as figure 2 As shown, the present embodiment is similar to the embodiment 1, and the parameters are changed on the basis of the embodiment 1, specifically: the temperature selected for the reaction in the reactor 1 during the chlorination reaction is 600°C; the centrifugal pump 9 is pumped into CCl 4 The flow rate of the cooling water machine is controlled at 10mL / min; 4.2 The temperature of the cooling water in the cooling circulating water machine is 25°C. CCl 4 The utilization rate is extremely high, the yield of the chlorination product is 98.99%, and the utilization rate of carbon tetrachloride is 92.87% through analysis.

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Abstract

The invention discloses a cerium dioxide chlorination device which comprises a reactor, a heating unit, a condensing unit, a gas and liquid separation unit, a gas absorption unit, a CC14 liquid collection unit and a gas supply unit. The cerium dioxide chlorination device disclosed by the invention has the beneficial effects that cerium dioxide can be chlorinated into cerium trichloride to absorb toxic products C12 and COC12, carbon tetrachloride is fully recycled, and the separation of the cerium trichloride as a reaction product from the carbon tetrachloride as a chlorinating agent can be realized after reaction completion; not only does no waste exist, and can the stoichiometric reaction be achieved basically, but also no waste can be produced.

Description

technical field [0001] The invention relates to the professional field of rare earth production; in particular, it relates to a cerium dioxide chlorination device. Background technique [0002] Cerium is an important raw material in the automotive glass additive industry and the automotive exhaust purification catalyst industry. Cerium oxides and chlorides play an important role in the separation and purification of cerium metal, among which the conversion of cerium oxide into cerium trichloride is one of the key steps in the electrolysis of molten chloride salts to prepare metal cerium. [0003] There are many ways to convert oxides into chlorides, mainly using HCl gas, CCl 4 and COCl 2 Wait. Among them, CCl 4 It is a commonly used chlorinating agent, and the reaction of chlorinated rare earth oxide is as follows (with CeO 2 example): 2CeO 2 +2CCl 4 →2CeCl 3 +2CO 2 +Cl 2 , 2CeO 2 +4CCl 4 →2CeCl 3 +4CO+4Cl 2 and 2CeO 2 +4CCl 4 →2CeCl 3 +4COCl 2 +Cl 2 . Ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00
CPCC01F17/271
Inventor 贾艳虹何辉肖益群林如山李迅
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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