Method for preparing aluminum molybdate with cationic membrane electrolysis method

A cationic membrane, aluminum molybdate technology, applied in the electrolysis process, electrolysis components and other directions, can solve the problems of long (up to several hours or even days, the reaction time of additives, etc., to achieve short reaction time, reduced preparation cost, easy effect of operation

Inactive Publication Date: 2015-07-22
SHANGHAI INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 ph

Method used

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  • Method for preparing aluminum molybdate with cationic membrane electrolysis method
  • Method for preparing aluminum molybdate with cationic membrane electrolysis method
  • Method for preparing aluminum molybdate with cationic membrane electrolysis method

Examples

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Embodiment 1

[0036] A method for preparing aluminum molybdate by cationic membrane electrolysis, specifically comprising the steps of:

[0037] (1) Use aluminum 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, adopt the method of constant voltage electrolysis, control the temperature range from room temperature to 50°C, and constant voltage electrolyze the aqueous solution containing depolarizer and sodium molybdate for 10 minutes;

[0038] The inert electrode is a titanium mesh;

[0039] 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 nitric acid;

[0040] Described acid solution is the aqueous hydrochloric acid solution that concentration is 0.1mol / L;

[0041] The ca...

Embodiment 2

[0047] A kind of method utilizing cationic membrane electrolysis to prepare aluminum molybdate, concrete steps are as follows:

[0048](1) Use aluminum 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, adopt the method of constant current electrolysis, and control the temperature range from room temperature to 50°C to electrolyze the aqueous solution containing depolarizer and sodium molybdate for 10 minutes;

[0049] The inert electrode is a titanium mesh;

[0050] 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 nitric acid;

[0051] Described acid solution is the aqueous hydrochloric acid solution that concentration is 0.1mol / L;

[0052] The cationic memb...

Embodiment 3

[0058] A method for preparing aluminum molybdate by cationic membrane electrolysis, specifically comprising the steps of:

[0059] (1) Use aluminum 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, adopt the method of constant current electrolysis, and control the temperature range from room temperature to 50°C to electrolyze the aqueous solution containing depolarizer and sodium molybdate for 10 minutes;

[0060] The inert electrode is a titanium mesh;

[0061] 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 nitrate;

[0062] Described alkali solution is the sodium hydroxide aqueous solution that concentration i...

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Abstract

The invention discloses a method for preparing aluminum molybdate with a cationic membrane electrolysis method. An aluminum sheet is taken as an anode, an inert electrode is taken as a cathode, an aqueous solution containing a depolarizer and sodium molybdate is taken as an anolyte, an acid solution, an alkaline solution or a salt solution is taken as a catholyte, and the aqueous solution containing the depolarizer and the sodium molybdate is electrolyzed in a double-chamber electrolytic cell with a cationic membrane serving as a diaphragm with the temperature controlled to range from the room temperature to 90 DEG C in a constant-current electrolysis or constant-voltage electrolysis manner until all Na<+> ions are transferred to a cathode chamber; a product obtained in an anode chamber is washed and filtered with deionized water, an obtained filter cake is dried at the temperature of 300-400 DEG C for 1-4 h, and the aluminum molybdate which is high in purity and free of impurity phases is obtained. According to the method, the effect of cationic membrane electrolysis is used, the Na<+> ions are transferred to the cathode chamber, the effect caused by the Na<+> ions is eliminated, the reaction time is short, and the finally obtained aluminum molybdate product is high in purity and free of the impurity phases.

Description

technical field [0001] The invention relates to a method for preparing aluminum molybdate by cationic membrane electrolysis, which belongs to the field of inorganic materials. technical background [0002] al 2 (MoO 4 ) 3 belongs to A 2 (MO 4 ) 3 Compounds of structural type, where A=Y, Sc, In, Al and rare earth metals from Ho to Lu, M=W, Mo, belong to the orthorhombic crystal system, have a negative bulk thermal expansion coefficient, due to A 2 (MO 4 ) 3 The structure has a relatively large compatibility and can accommodate +3-valent cations with an ionic radius of 67.5-107.5pm. Therefore, it is possible to change the type of A ions or form different A 2 (MO 4 ) 3 The solid solution of the compound of the structure type can change the temperature at which the crystal structure type changes from the orthorhombic phase transition to the monoclinic phase, thereby preparing materials with positive, negative, or zero thermal expansion coefficients. It has potential a...

Claims

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Application Information

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IPC IPC(8): C25B1/00
CPCC25B1/00
Inventor 张全生闵凡奇贾李李李细方李硕王淼党国举王昭勍李海燕尹佳佳
Owner SHANGHAI INSTITUTE OF TECHNOLOGY
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