Device and method for preparing ammonium molybdate from molybdic acid

A technology of ammonium molybdate and ammonium tetramolybdate, which is applied to the preparation of molybdenum compounds, chemical instruments and methods, and molybdenum compounds, can solve the problems of high energy consumption, low concentration of ammonium molybdate solution, and large consumption of ammonia water, etc., and achieve High economic value, reduced staff workload, and low processing costs

Inactive Publication Date: 2019-04-23
成都虹波钼业有限责任公司
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are still some defects in the above-mentioned treatment method: ① the classic ammonium leaching calcine, because the impurity content in the ammonium molybdate solution is high, it is necessary to carry out deep impurity removal before evaporation and crystallizati

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
  • Device and method for preparing ammonium molybdate from molybdic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] Such as figure 1 As shown, taking the six-stage countercurrent absorption and concentration device as an example, the present invention utilizes molybdic acid to prepare ammonium molybdate. 1. The inlet of molybdenum acid solution for adding molybdenum acid solution and the outlet of ammonium molybdate solution for discharging ammonium molybdate solution. The first-stage to fifth-stage absorption tanks are also equipped with tail gas outlets for discharging ammonia-containing tail gas and use Add the ammonium molybdate solution inlet of the ammonium molybdate solution, the exhaust gas outlet of the previous stage absorption tank is connected with the tail gas inlet of the rear stage absorption tank, the ammonium molybdate solution inlet of the previous stage absorption tank is connected with the rear stage absorption tank The ammonium molybdate solution outlet is connected.

[0029] Among them, in order to distinguish in name from the ammonium molybdate solution genera...

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 discloses a device and a method for preparing ammonium molybdate from molybdic acid. The device comprises multiple stages of countercurrent absorption and concentration devices. The molybdic acid is used for carrying out circulating absorption on ammonia-containing tail gas after size mixing is carried out, and is dissolved to obtain ammonium molybdate solution with the saturation concentration along with ammonia gas absorption, the ammonia-containing tail gas is switched to a previous stage to be reabsorbed after the certain requirements are met by absorption liquid of a backward stage, and accordingly the solution concentration of the absorption liquid can be increased; the ammonium molybdate solution is transported to main processes to be used after the technological requirements are ultimately met by absorption liquid of a first stage. Compared with the prior art, the device and the method have the advantages that the amount of labor of staffs can be reduced; the production cost can be lowered to a great extent, strong ammonia water needs to be supplemented to carry out dissolution in the original technologies, but the molybdic acid can be directly dissolved by the ammonia-containing tail gas, and the requirements of emission standards can be met by ammonia-containing tail gas after absorption treatment is carried out on the ammonia-containing tail gas; the device and the method are low in treatment cost, are safe and environmentally friendly and have high economic values.

Description

technical field [0001] The invention belongs to the technical field of ammonium molybdate preparation, and relates to a device and a method for preparing ammonium molybdate by using molybdic acid. Background technique [0002] Ammonium molybdate (ammonium molybdate), the molecular formula is H 8 MON 2 o 4 , with a molecular weight of 196.0145, is widely used as the basic raw material for the production of high-purity molybdenum products. For example, thermal dissociation of ammonium molybdate to produce high-purity molybdenum trioxide, hydrogen sulfide ammonium molybdate solution to produce high-purity molybdenum disulfide, ammonium molybdate to produce various molybdenum-containing chemical reagents, etc. Ammonium molybdate is also commonly used as the basic raw material for the production of molybdenum chemical products such as molybdenum catalysts and molybdenum pigments. [0003] The traditional preparation method of ammonium molybdate mainly comprises: (1) classic m...

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
IPC IPC(8): C01G39/00
CPCC01G39/003
Inventor 杨伟郑枝木刘锦锐
Owner 成都虹波钼业有限责任公司
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