Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for recovering sulfuric acid from waste acid produced by anthraquinone production

A production process, anthraquinone waste acid technology, applied in the direction of sulfur trioxide/sulfuric acid, etc., can solve the problems of complex operation and low added value of products, and achieve the effects of simple operation, reduced consumption, and easy availability of raw materials

Inactive Publication Date: 2015-12-16
NANJING GUANSHAN CHEM TECH
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the obtained product contains a large amount of iron ions, and flocculation treatment is required to meet the product standard, the operation is complicated, and the added value of the product is low

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 recovering sulfuric acid from waste acid produced by anthraquinone production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The present invention will be further described below in conjunction with specific embodiments and drawings:

[0016] Activated carbon adsorption and nitric acid oxidation are used to treat the anthraquinone waste acid under the following method conditions: the anthraquinone waste acid is subjected to solid-liquid separation in the filter 1, and the suspended matter in the waste acid is separated to obtain a relatively pure waste acid solution. After the spent acid solution reaches the adsorption tank 2, add 3% of its weight activated carbon to the spent acid solution, turn on stirring and heating, raise the temperature to 80°C to stop heating, and stir to maintain the tank temperature for 2 hours, then pass through the filter 3 for solid-liquid Separate. The temperature of activated carbon during adsorption is 50-90°C. The waste acid filtrate separated by the filter 3 is sent to the concentration tank 4, and the concentration tank is heated to 180-200°C under the vacuum ...

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 method for recovering sulfuric acid from waste acid produced by anthraquinone production. The method comprises carrying out solid-liquid separation on anthraquinone waste acid, adding active carbon into the separated waste acid solution, carrying out solid-liquid separation, carrying out vacuum concentration on the waste acid filtrate to obtain a concentrated solution with a sulfuric acid mass fraction of 90% or more, adding a nitric acid solution into the concentrated solution, and carrying out oxidation until the concentrated solution is clear and transparent. Through adsorption, condensation and oxidation, a sulfuric acid component is recovered from anthraquinone waste acid. The method utilizes easily available raw materials and process control is easy.

Description

Technical field [0001] The invention relates to a processing method for waste acid produced in the production process of anthraquinone, in particular to a new processing process for the concentration, decolorization and recovery of waste acid of anthraquinone. Background technique [0002] Sulfuric acid has a large number of applications in the production of anthraquinone. In the production of anthraquinone, the utilization rate of sulfuric acid is low, and a large amount of waste acid is eliminated along with the waste acid. The efflux of the waste acid not only caused the acidification of the land but also greatly wasted sulfuric acid resources. As a result, advanced treatment technologies have also developed rapidly. According to the patents and journal documents that have been consulted, the treatment of anthraquinone waste acid mainly includes the following methods: 1. Sulfate preparation method. In Chinese patent CN201410504121.X, Ecole Environmental Protection Technology...

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): C01B17/90
Inventor 华军伍骏朱志宏方林高红进
Owner NANJING GUANSHAN CHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com