Method for decolorizing sulfuric acid by using hydrogen peroxide

A technology of hydrogen peroxide and hydrogen peroxide solution, which is applied in the direction of sulfur trioxide/sulfuric acid, etc., can solve the problem of chroma and transparency affecting the survival market of gypsum acid, and the chroma and transparency cannot meet the standard sulfuric acid finished products and cannot enter the first-class product market Ranks and other issues, to achieve the effect of improving market competitiveness, strong oxidation, and simple process

Inactive Publication Date: 2012-10-31
刘立文
View PDF1 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the gas and coal tar produced by incomplete coal combustion will inevitably enter the kiln gas and be brought to the sulfuric acid production system, which will also cause the color and transparency of the sulfuric acid product to exceed the standard
[0009] Sulfuric acid finished products whose chroma and transparency cannot meet the standards cannot enter the ranks of the first-class product market
At present, the price of gypsum acid (sulfuric acid made from gypsum) with the same intrinsic quality is about 10% lower than that of other homogeneous acids, which directly affects the economic benefits of enterprises. Moreover, the problems of chroma and transparency seriously affect the price of gypsum acid. survival market

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 decolorizing sulfuric acid by using hydrogen peroxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This embodiment includes the following steps: inject hydrogen peroxide solution into 99.6wt% sulfuric acid in a closed sulfuric acid decolorization tank at a rate of 15.74 L / min·t, and the volume ratio of sulfuric acid to hydrogen peroxide solution is 100:18; Stir continuously at a speed of 8 revolutions per minute to obtain finished sulfuric acid.

[0022] The hydrogen peroxide solution is 30wt% industrial hydrogen peroxide.

[0023] In this example, hydrogen peroxide solution was used to treat sulfuric acid, and the detection results of decolorizing sulfuric acid are shown in Table 1. The results show that such an amount of hydrogen peroxide solution oxidizer has little effect on the internal quality of the sulfuric acid product, and does not affect the chemical composition and use performance of the sulfuric acid product.

[0024]

Embodiment 2

[0026] This embodiment includes the following steps: inject hydrogen peroxide solution into 98.5wt% sulfuric acid in a closed sulfuric acid decolorization tank at a speed of 6.80L / min·t, and the volume ratio of sulfuric acid to hydrogen peroxide solution is 100:8; Stir at a stirring speed of 10 revolutions per minute until the hydrogen peroxide solution has been added; the finished sulfuric acid is obtained.

[0027] The hydrogen peroxide solution is 70wt% H 2 O 2 Industrial hydrogen peroxide.

[0028] In this embodiment, hydrogen peroxide solution is used to treat sulfuric acid to decolor the brown or dark brown sulfuric acid. The results show that such an amount of hydrogen peroxide solution oxidizer has little effect on the internal quality of the sulfuric acid product, and does not affect the chemical composition and use performance of the sulfuric acid product.

Embodiment 3

[0030] This embodiment includes the following steps: inject the hydrogen peroxide solution into 99wt% sulfuric acid in a closed sulfuric acid decolorization tank at a speed of 11.0L / min·t, and the volume ratio of sulfuric acid to hydrogen peroxide solution is 100:10; while continuously stirring , The stirring speed is 15 revolutions per minute, until the hydrogen peroxide solution is added; the finished sulfuric acid is obtained.

[0031] The hydrogen peroxide solution is 50wt% H 2 O 2 Industrial hydrogen peroxide.

[0032] In this embodiment, hydrogen peroxide solution is used to treat sulfuric acid to decolor the brown or dark brown sulfuric acid. The results show that such an amount of hydrogen peroxide solution oxidizer has little effect on the internal quality of the sulfuric acid product, and does not affect the chemical composition and use performance of the sulfuric acid product.

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 relates to a method for decolorizing sulfuric acid by using hydrogen peroxide. The method includes the following steps of injecting a hydrogen peroxide solution to the sulfuric acid in a closed sulfuric acid decolorizing tank at a speed of 6-18L/min*t with a volume ratio of the sulfuric acid to the hydrogen peroxide solution being 100: (6-22); and simultaneously continuously stirring a mixture at a speed of 8-15 revolutions per minute to obtain the finished sulfuric acid. By means of the hydrogen peroxide solution, the method is strong in oxidizability, good in selectivity, simple in process, convenient, flexible and capable of decolorizing tawny or black brown sulfuric acid; under acidic conditions, reduzate of the hydrogen peroxide is water, other metal ions can not added to the sulfuric acid finished product, and the quality of the sulfuric acid finished product can not be changed; therefore, the problem that the chromaticity and the transparency of the sulfuric acid finished product prepared by gypsum flue gases can't reach the standard can be eliminated, the quality of gypsum flue gas acid can reach the standard of high-class products of industrial concentrated sulfuric acid, the market competitiveness of the gypsum acid is improved, and economic benefits of enterprises are increased.

Description

Technical field [0001] The invention relates to a method for decolorizing sulfuric acid using hydrogen peroxide. Background technique [0002] Sulfuric acid is commonly known as the mother of industry and has a wide range of uses. It is a basic chemical raw material needed in all industrial fields of the national economy. [0003] According to the prediction of the China Chemical and Mining Association, to manufacture sulfuric acid, China will need 17.2 million tons of sulfur in 2015 and 21 million tons in 2020. [0004] At present, the main raw materials used in the manufacture of sulfuric acid in my country are pyrite and associated sulfur, but the guaranteed period of the existing reserves of pyrite and associated sulfur in my country is only 16 years. It can be seen that pyrite and associated sulfur resources are quite scarce. [0005] my country is rich in gypsum resources, natural gypsum (mainly anhydrite CaSO 4 ) The reserves rank first in the world, and a large amount of indu...

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): C01B17/90
Inventor 刘立文刘珍如宁爱民宁勇宁江天刘勇鲁纪鸣
Owner 刘立文
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