Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing vanadyl sulfate

A technology of vanadyl sulfate and sulfuric acid, applied in chemical instruments and methods, vanadium compounds, inorganic chemistry, etc., can solve the problems of low purity of vanadyl sulfate

Active Publication Date: 2010-02-17
BYD CO LTD
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method for preparing vanadyl sulfate with higher purity in order to overcome the defect of low purity of vanadyl sulfate prepared by the prior art

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0006] The invention provides a method for preparing vanadyl sulfate, wherein the method comprises contacting vanadium pentoxide with hydrochloric acid having a concentration of at least 30% by weight, and extracting the resulting solution with a water-immiscible extractant for extracting chlorine Chlorine gas to obtain the water phase; the water phase is contacted with an aqueous solution of sulfuric acid at 70-80 ° C, and the molar ratio of sulfuric acid to the water phase is 2:1-4:1 in terms of vanadium pentoxide; and then adjusted with a pH regulator The pH value is 6-7, and the pH regulator is a compound that is insoluble in water and can react with sulfuric acid to generate insoluble sulfate salts. Solid-liquid separation obtains a liquid containing vanadyl sulfate, and the water in the liquid is removed. Obtain vanadyl sulfate.

[0007] When the vanadium pentoxide is in contact with hydrochloric acid, the amount of hydrochloric acid is not particularly limited, as long ...

Embodiment 1

[0015] This embodiment is used to illustrate the preparation of vanadyl sulfate of the present invention.

[0016] 6.82 g (0.0375 mol) of V 2 o 5 The hydrochloric acid (37.5% by weight) (0.118 mol) of solid particle and 10 milliliters is added in the round bottom flask of 100 milliliters, wherein, spherical funnel and condenser are equipped with on the round bottom flask, the concentrated hydrochloric acid (37.5 % by weight) (0.118 mol). Heat the reactants in the round bottom flask to 50°C, and then react at 50°C for 40 minutes. During the reaction, slowly add concentrated hydrochloric acid dropwise through the spherical funnel, and drop all the concentrated hydrochloric acid in the spherical funnel within 10 minutes. Add to round bottom flask. After the mixture was cooled to room temperature, 30 ml of carbon tetrachloride was added to the mixture; then the resulting mixture was poured into a separatory funnel, shaken well, and left to stand. The solution is divided into t...

Embodiment 2

[0020] This embodiment is used to illustrate the preparation of vanadyl sulfate of the present invention.

[0021] 6.82 g (0.0375 mol) of V 2 o 5 Solid particles and 15 milliliters of hydrochloric acid (36% by weight) (0.177 mol) were added in a 100 milliliter round-bottomed flask, wherein a spherical funnel and a condenser were installed on the round-bottomed flask, and 15 milliliters of concentrated hydrochloric acid (36 mol) was housed in the spherical funnel. % by weight) (0.177 mol). Heat the reactants in the round-bottom flask to 40°C, and then react at 40°C for 80 minutes. During the reaction, slowly add concentrated hydrochloric acid dropwise through the spherical funnel, and drop all the concentrated hydrochloric acid in the spherical funnel within 20 minutes. Add to round bottom flask. After the mixture was cooled to room temperature, 35 milliliters of carbon tetrachloride was added to the mixture group; then the resulting mixture was poured into a separatory funn...

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 a method for preparing vanadyl sulfate. The method comprises the following steps: contacting vanadium pentoxide with hydrochloric acid at a concentration of at least 30 weight percent, and extracting chlorine from the obtained solution by a water-immiscible extracting agent for extracting the chlorine to obtain a water phase; contacting the water phase with aqueous solutionof sulfuric acid at the temperature of between 70 and 80 DEG C, wherein the molar ratio of the sulfuric acid to the water phase is 2:1 to 4:1 in terms of the vanadium pentoxide; and then, regulating apH value to 6 to 7 by a pH value regulating agent, wherein the pH value regulating agent is hydrophobic, and can react with the sulfuric acid to generate a hydrophobic compound of sulfate, performingsolid-liquid separation to obtain liquid containing the vanadyl sulfate, and removing the water in the liquid to obtain the vanadyl sulfate. The vanadyl sulfate prepared by the method of the invention has high purity higher than 95 percent; while the purity of the vanadyl sulfate prepared by a contrast sample is only 81 percent.

Description

technical field [0001] The invention relates to a preparation method of vanadyl sulfate. Background technique [0002] Vanadyl sulfate has a wide range of uses as a chemical raw material, such as being used as a colorant for glass and ceramics and as an electrolyte in vanadium batteries. Usually, vanadyl sulfate is prepared by dissolving vanadium pentoxide with hot sulfuric acid and then reducing it with a reducing agent, but the production cost of this method is relatively high. Disclosed a kind of preparation method of vanadyl sulfate in CN1491898A, it is characterized in that, this method comprises adding vanadium trioxide and vanadium pentoxide in sulfuric acid, filters, and filtrate is evaporated and crystallized, sloughs crystal water, obtains sulfuric acid oxygen Vanadium powder. The cost of preparing vanadyl sulfate by adopting the method is relatively low, but the purity of the prepared vanadyl sulfate is relatively low. Contents of the invention [0003] In or...

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): C01G31/00
Inventor 丁明明李世彩周文会赵瑞兰
Owner BYD CO LTD