Method for synthesis of zinc molybdate or alkali type zinc molybdate

A technology for synthesizing zinc molybdate and zinc molybdate, which is applied in chemical instruments and methods, molybdenum compounds, inorganic chemistry, etc., can solve the problems of difficult centrifugation, low product yield, and affecting product quality, and achieves environmental friendliness and synthetic The effect of simple method

Active Publication Date: 2009-02-18
GUANGXI RES INST OF CHEM IND CO LTD
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the synthesis method of zinc molybdate and basic zinc molybdate includes the metathesis reaction of sodium molybdate (or ammonium molybdate) and zinc sulfate. Since the reaction is a liquid-liquid reaction, the zinc molybdate generated is relatively fine and difficult to be separated by centrifugation. , and a large amount of water-soluble salts are generated in the reaction process, if not washing, it will affect the quality of the product, but as washing, and because the water solubility of zinc molybdate is higher, the yield of the final product is lower, so In the actual production process, various body pigments are generally added, such as [China Chemical Products Encyclopedia, 2005.542]

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for synthesis of zinc molybdate or alkali type zinc molybdate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 68g of industrial-grade ammonium heptamolybdate (also known as ammonium molybdate tetrahydrate) and put it into a flat-bottomed flask, add 350mL of water, heat to dissolve, and set aside.

Embodiment 2

[0019] Measure 50mL of 27% ammonia water into a flat-bottomed flask, add 65g of industrial grade ammonium tetramolybdate and 300mL of water, magnetically stir to dissolve, and set aside.

Embodiment 3

[0021] In the ammonium molybdate solution prepared in Example 1 or Example 2, add 32g of industrial grade ZnO (the molar ratio of Zn / Mo is 1:1) while magnetically stirring, and connect the water absorption device to the outlet of the flat-bottomed flask. Heat up to 50°C, react at constant temperature for 2 hours, centrifuge to obtain a white precipitate, and keep the mother liquor for future use. Put the white precipitate into an oven, control the temperature at 110° C., and dry it for 5 hours to obtain a white powder weighing 90.5 g. The white powder is ZnMoO 4 2H 2 O, content 99.1%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides method for synthesizing the zinc molybdate or the basic zinc molybdate adopting the industrial zinc oxide and the ammonium molybdate as the raw materials through controlling different mole ratio between the zinc and the molybdenum. When the mole ratio between the zinc and the molybdenum is 0 to 1: 1, zinc molybdate can be obtained through the method; when the mol ratio of Zn/Mo more than 1:1, the basic zinc molybdate is obtained; the reaction temperature is 40 to 100 DEG C, and the reaction time is 0.5 to 12 hours, and the ammonia gas that is generated in the reaction is absorbed by the water for use; the mother solution that is centrifugally separated is used as the reacted zinc molybdate solution to be cycled for use. The content of the zinc molybdate that is synthesized with the method can reach 99 percent, and the content of the basic zinc molybdate can be more than 95 percent.

Description

Technical field: [0001] The invention relates to a method for synthesizing zinc molybdate or basic zinc molybdate. Background technique: [0002] Zinc molybdate or basic zinc molybdate, also known as molybdenum white, the molecular formula is XZnO ZnMoO 4 ·YH 2 O (zinc molybdate when X=0; basic zinc molybdate when X>0). Zinc molybdate and basic zinc molybdate can be used in various occasions as corrosion inhibitor, antirust pigment, flame retardant and smoke suppressant, etc. [0003] At present, the synthesis method of zinc molybdate and basic zinc molybdate includes the metathesis reaction of sodium molybdate (or ammonium molybdate) and zinc sulfate. Since the reaction is a liquid-liquid reaction, the zinc molybdate generated is relatively fine and difficult to centrifuge. , and a large amount of water-soluble salts are generated in the reaction process, if not washing, it will affect the quality of the product, but as washing, and because the water solubility of zin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/00
Inventor 俞于怀李开成胡容平吴良
Owner GUANGXI RES INST OF CHEM IND CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap