Method for extracting iodine from iodine containing circulation water of yellow phosphorus factory

A technology for circulating water and extracting iodine, which is applied in the field of extracting iodine and can solve problems such as environmental pollution

Active Publication Date: 2008-12-10
WENGFU (GRP) CO LTD
View PDF0 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The object of the present invention is to: provide a kind of method that extracts iodine from the circulating water of iodine-containing yellow phosphorus plant; This method mainly carries out effective iodine separation to the circulating water of low-iodine-containing yellow phosphorus plant that cannot be processed by other methods, and uses hydrogen peroxide and sulfur dioxide As a raw material for production, it is more convenient and safe; it not only solves the problems of waste discharge and environmental pollution, but also provides a new raw material for iodine production, so that waste can be turned into treasure, and at the same time it can overcome the problems of existing technologies. technical issues

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

Embodiment 1

[0018] Embodiment 1 of the present invention: extract iodine from the circulating water of iodine-containing yellow phosphorus factory, wherein the content of iodine in circulating water is: 80~140mg / L, the content of phosphorus in circulating water is 100~400mg / L, in this circulating water of 100 kilograms Add 0.01 kg of composite oxidant, the ratio of composite oxidant is 27-35% hydrogen peroxide, 0.1-0.2% vanadium pentoxide, and the rest is water, that is, add 0.1-0.2% vanadium pentoxide to the hydrogen peroxide. Mix for 5 minutes to carry out the oxidation reaction, then blow out the molecular iodine with hot air at 40 degrees Celsius, the volume ratio of the hot air blown to the liquid is 130:1, and then use 2 When the iodine content in the obtained liquid reaches 100g / L, add 0.5 kg of hydrogen peroxide per 100 kg of the obtained liquid to precipitate the iodine, filter and centrifuge, and refine to obtain the finished iodine.

Embodiment 2

[0019] Embodiment 2 of the present invention: extract iodine from the circulating water of iodine-containing yellow phosphorus factory, wherein the content of iodine in circulating water is: 100mg / L, the content of phosphorus in circulating water is 240mg / L, add 0.5 kilograms of iodine in this circulating water of 1000 kilograms Composite oxidant, the proportion of composite oxidant is 30% hydrogen peroxide, 0.2% vanadium pentoxide, and the rest is water, mix for 30 minutes for oxidation reaction, and then blow out the molecular iodine with hot air at 40 degrees Celsius, blowing hot air The volume ratio with the liquid is 150: 1, then use SO2 acidic solution to circulate and absorb, and when the iodine content in the obtained liquid reaches 150g / L, add 3 kilograms of hydrogen peroxide in the liquid obtained per 100 kilograms to separate out iodine, filter and Centrifugal separation, refined iodine.

Embodiment 3

[0020] Embodiment 3 of the present invention: extract iodine from the circulating water of iodine-containing yellow phosphorus factory, wherein the content of iodine in circulating water is: 110mg / L, the content of phosphorus in circulating water is 300mg / L, adds 1 kilogram of in this circulating water of 1000 kilograms Composite oxidant, the proportion of composite oxidant is 1 kg of 30% hydrogen peroxide, add 20 grams of vanadium pentoxide, mix for 10 minutes to carry out oxidation reaction, the time of oxidation reaction is controlled in 10-20 minutes to ensure sufficient oxidation reaction , and can control the production time and reduce production costs. Then use 40 degrees Celsius hot air to blow out the molecular iodine, the volume ratio of the hot air to the liquid is 150:1, and then use SO 2 When the acidic solution is circulated and absorbed, and the iodine content in the obtained liquid reaches 150g / L, add 2 kg of hydrogen peroxide per 100 kg of the obtained liquid ...

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 extracting iodine from the iodine-containing recycled water of a yellow phosphorus plant; the iodine is extracted from the recycled water generated from yellow phosphorus production process, wherein, the content of iodine in the recycled water is 80-140mg / L, the content of phosphorus in the recycled water is 100-400mg / L, compound oxidant is added into the recycled water for oxidation reaction, ionic iodine is oxidized into molecular iodine, air is used for blowing molecular iodine out, then SO2-containing acidic solution is used for absorbing, the pH value of absorption liquid is between 1-6, then hydrogen peroxide is added to separate iodine out and filtration and separation are carried out to obtain finished iodine. The recycled water from the yellow phosphorus plant with iodine content of below 140 mg / L is usually selected as raw material for extracting iodine; the method and the compound oxidant proposed by the applicant after tests can extract the iodine with low content in the recycled water and can expand the select range of the raw material for extracting iodine, and optimum compound oxidant proportion and production technique are also provided by the tests.

Description

Technical field: [0001] The invention relates to a method for extracting iodine from circulating water of an iodine-containing yellow phosphorus plant, and belongs to the technical fields of iodine extraction, environmental protection and chemical industry. Background technique: [0002] At present, most industrial iodine manufacturers in my country use high-grade iodide-containing brine, brine, or kelp soaking solution (iodine content: 200-300mg / L) as raw materials to produce industrial iodine. Most of the processes used are ion exchange resin methods. That is to say, the high-grade iodide-containing bittern, brine, or kelp soaking liquid is acidified with acid, and chlorine gas is introduced to make iodine free and precipitate, and then adsorbed by polystyrene ion exchange resin. There are two methods of desorption: one is elution with sulfite solution, and then potassium chlorate is used to precipitate iodine, centrifuged, and crude iodine is melted and refined by sulfuric...

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): C01B7/14
Inventor 陈肖虎张翠微樊囿宇刘辉陈庆周仲虎田言查少华杨善志
Owner WENGFU (GRP) 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