Method for preparing nickel molybdate by using cationic membrane electrolysis process

A technology of cationic membrane and nickel molybdate, which is applied in the direction of electrolysis process, electrolysis components, diaphragm, etc., can solve the problems of additives’ reaction time, long time (up to several hours or even days), and achieve the reduction of preparation cost and short reaction time , the effect of a large amount of synthesis

Inactive Publication Date: 2015-02-18
SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the solid-state synthesis method has a lot of metal oxide impurities because the raw material mixing cloth is uniform; The shortcoming of sol-gel method, aqueous phase precipitation method, hydrothermal method, microwave method etc. is that the existence of additive is arranged or reaction time is longer (up to hours or even days)

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  • Method for preparing nickel molybdate by using cationic membrane electrolysis process
  • Method for preparing nickel molybdate by using cationic membrane electrolysis process
  • Method for preparing nickel molybdate by using cationic membrane electrolysis process

Examples

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Embodiment 1

[0038] A kind of method utilizing cationic membrane electrolysis to prepare nickel molybdate, specifically comprises the following steps:

[0039] (1) Use nickel sheet as anode, inert electrode as cathode, 95ml aqueous solution containing depolarizer and sodium molybdate as anolyte, 90ml acid solution as catholyte, double-chamber electrolysis with cationic membrane as diaphragm In the tank, constant voltage electrolysis is adopted, and the temperature range is controlled from room temperature to 50 ° C. Constant voltage electrolysis contains depolarizer and sodium molybdate for 30 minutes, namely Na + The ions are all transferred to the cathode chamber;

[0040] The inert electrode is a titanium mesh;

[0041] In the aqueous solution containing depolarizer and sodium molybdate, the concentration of sodium molybdate is 0.1mol / L, the concentration of depolarizer is 0.01mol / L, and the depolarizer is ammonium chloride;

[0042] Described acid solution is the aqueous hydrochloric...

Embodiment 2

[0049] A kind of method utilizing cationic membrane electrolysis to prepare nickel molybdate, concrete steps are as follows:

[0050](1) Use nickel sheet as anode, inert electrode as cathode, 95ml aqueous solution containing depolarizer and sodium molybdate as anolyte, 90ml acid solution as catholyte, double-chamber electrolysis with cationic membrane as diaphragm In the tank, the constant current electrolysis method is adopted, and the temperature range is controlled from room temperature to 50°C to electrolyze the aqueous solution containing depolarizer and sodium molybdate for 30 minutes, that is, Na + The ions are all transferred to the cathode chamber;

[0051] The inert electrode is a titanium mesh;

[0052] In the described aqueous solution containing depolarizing agent and sodium molybdate, the concentration of sodium molybdate is 0.1mol / L, and the concentration of depolarizing agent is 0.01mol / L, and described depolarizing agent is sodium chloride;

[0053] Describe...

Embodiment 3

[0060] A kind of method utilizing cationic membrane electrolysis to prepare nickel molybdate, specifically comprises the following steps:

[0061] (1) Use nickel sheet as anode, inert electrode as cathode, 95ml aqueous solution containing depolarizer and sodium molybdate as anolyte, 90ml alkali solution as catholyte, double-chamber electrolysis with cationic membrane as diaphragm In the tank, the constant current electrolysis method is adopted, and the temperature range is controlled from room temperature to 50°C to electrolyze the aqueous solution containing depolarizer and sodium molybdate for 30 minutes, that is, Na + The ions are all transferred to the cathode chamber;

[0062] The inert electrode is a titanium mesh;

[0063] In the aqueous solution containing depolarizing agent and sodium molybdate, the concentration range of sodium molybdate is 0.1mol / L, and the concentration of depolarizing agent is 0.01mol / L, and described depolarizing agent is sodium chloride;

[00...

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Abstract

The invention provides a method for preparing nickel molybdate by using a cationic membrane electrolysis process. The method comprises the steps of utilizing a nickel sheet as an anode, a noble electrode as a cathode, an aqueous solution containing a depolarizer and sodium molybdate as an anode liquor, and an acid / alkali / salt solution as a cathode liquor; in a double-compartment electrolytic cell with a cationic membrane as a diaphragm, controlling the temperature from room temperature to 90 DEG C to electrolyze the aqueous solution containing the depolarizer and the sodium molybdate in a constant-current electrolysis or constant-voltage electrolysis manner till all Na<+> ions are transferred to a cathode compartment; simultaneously cleaning and filtering products from the anode by using deionized water to obtain a filter cake, drying the filter cake, and then increasing the temperature to 500-700 DEG C under air atmosphere at the speed of 2.5-10 DEG C / min to perform high-temperature roasting on the dried filter cake for 1-5 hours; naturally cooling down the temperature of the roasted product to the room temperature, and then obtaining the nickel molybdate with high purity and no impure phase. According to the method for preparing the nickel molybdate by using the cationic membrane electrolysis process, all the Na<+> ions are transferred to the cathode compartment under the action of the cationic membrane electrolysis, so that the Na<+> influence is eliminated and the reaction time is short.

Description

technical field [0001] The invention belongs to the field of inorganic materials, in particular to nickel molybdate, in particular to a method for electrolytically preparing nickel molybdate by cationic membrane. technical background [0002] Metal molybdates (such as CoMoO 4 、NiMoO 4 , MnMoO 4 etc.) is an important part of the inorganic material family, which is cheap, environmentally friendly, and rich in resources, and exhibits unique properties in many fields. Molybdate micro / nano materials have superior optical, electrical, and magnetic properties and are widely used It is used in the fields of laser donor materials, optical fibers, humidity sensors, luminescent materials, magnetic materials, catalytic materials and antibacterial materials. The proven reserves of molybdenum resources in China rank among the top in the world. With the advantages of molybdenum resources, the development of new molybdenum-based products with high added value has significant economic val...

Claims

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Application Information

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IPC IPC(8): C25B1/00C25B13/02
CPCC25B1/00C25B13/02C25B15/02
Inventor 张全生闵凡奇李硕李细方王淼党国举王昭勍李海燕贾李李
Owner SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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