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

Plasticized polymer ionic liquid film and method for selective separation of chromium (VI) through same

An ionic liquid and polymer technology, applied in chemical instruments and methods, ion-exchanged water/sewage treatment, water pollutants, etc., can solve problems such as system instability, cumbersome technical operations, environmental hazards, etc. Stability, high mass transfer stability, effect of improving crystallinity

Active Publication Date: 2020-02-07
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
View PDF9 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although secondary amine N 7207 The solution can be reused, but the liquid-liquid extraction and stripping cannot be carried out simultaneously. The technical operation is cumbersome, and the large amount of protective agent and stripping residue will bring more serious harm to the environment.
Polymer containment film has good stability and mechanical strength, ShigehiroKAGAYA i prepared a polymer-containing liquid film with ionic liquid A336 as a carrier to remove chromium (VI) in aqueous solution, but the relevant experiments in this document showed that the polymer-containing liquid film with a small-molecule liquid-phase ionic liquid as a carrier transported The quality rate is slow, and there are defects in the system instability, so it is difficult to realize industrial application

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
  • Plasticized polymer ionic liquid film and method for selective separation of chromium (VI) through same
  • Plasticized polymer ionic liquid film and method for selective separation of chromium (VI) through same
  • Plasticized polymer ionic liquid film and method for selective separation of chromium (VI) through same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: With dioctyl phthalate (DOP) as plasticizer, by mass percentage, with 3.47% polyvinyl chloride, 1.85% aliphatic amine tri-n-octylamine, 92.6% THF are mixed in 25 React at ℃ for 12 hours, add 2.08% dioctyl phthalate, stir magnetically until homogeneous and transparent casting solution, pour the casting solution into a flat-bottomed airtight container with a diameter of 55 mm and place it horizontally, and control the spreading thickness of the solution at 1.0mm, kept open to the atmosphere, volatilized at 35°C for 15h to constant weight to obtain a liquid film. Immerse it in 0.1M hydrochloric acid solution for 12h and take it out. The resulting plasticized plasticized polymer ionic liquid membrane was fixed in the central junction of the osmotic device. The effective membrane area is 3.14cm 2 , with a thickness of 150 μm. A solution containing chromium (VI) and zinc (II) with a volume of 80 mL and a concentration of 12 mg / L was adjusted to pH 1.3 with hy...

Embodiment 2

[0036] Embodiment 2: With o-nitrophenyl octyl ether (NPOE) as the plasticizer, by mass percent, 3.5% polyvinyl chloride, 2.5% aliphatic amine tri-n-octylamine and 40.5% tetrahydrofuran and 51% N,N-dimethylformamide mixed, reacted at 25°C for 24 hours, added 2.5% o-nitrophenyl octyl ether, and magnetically stirred until a homogeneous transparent casting solution. Pour the casting solution into a flat-bottomed airtight container with a diameter of 55mm and place it horizontally, control the thickness of the solution to spread at 2.0mm, keep it open to the atmosphere, volatilize at 35°C for 4 hours, and then volatilize at 105°C under normal pressure to constant weight A liquid film is then obtained. Immerse it in 0.5M hydrochloric acid solution for 24 hours, then take it out and keep it sealed. The resulting plasticized polymeric ionic liquid membrane was immobilized in the central junction of the osmotic device. The effective membrane area is 3.14cm 2 , with a thickness of 25...

Embodiment 3

[0037] Embodiment 3: with tributyl phosphate (TBP) as plasticizer, by mass percent, the 1,4-dioxane of 3.5% polyvinyl chloride 2.5% aliphatic amine tri-n-octylamine and 93% Mix together, react at 50°C for 18 hours, stir magnetically to a homogeneous and transparent casting solution, add 1.0% tributyl phosphate and stir evenly, control the spreading thickness of the solution at 1.8mm, pour the casting solution into a level with a diameter of 55mm Put it in a flat-bottomed airtight container, keep it open to the atmosphere, volatilize at 70°C for 12 hours to a constant weight to obtain a liquid film. Immerse it in 0.1M hydrochloric acid solution for 18 hours, then take it out and keep it sealed. The resulting plasticized polymeric ionic liquid membrane was immobilized in the central junction of the osmotic device. The effective membrane area is 3.14cm 2 , with a thickness of 250 μm. A solution containing chromium (VI) and zinc (II) with a volume of 80 mL and a concentration o...

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

PropertyMeasurementUnit
Areaaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a plasticized polymer ionic liquid film and a method for selective separation of chromium (VI) through the same. The method comprises the steps that 1.5-2.5% of fatty amine and3.0-3.5% of polyvinyl chloride are taken as reaction raw materials to be subjected to reactive blending in 91.5-93.0% of an organic solvent, then 1.0-4.0% of a plasticizer is added, the solvent is removed through volatilization, the plasticized polymer ionic liquid film is prepared through acidification transformation, and selective separation of the chromium (VI) in chromium (VI) feed liquid isconducted through the plasticized polymer ionic liquid film under synchronous conducting of extraction and reverse extraction. A film preparation technology is simple, the using amount of a reagent issmall, and selectivity to the chromium (VI) is high; energy consumption is low in the extraction process, and secondary pollution is avoided; a film phase is not prone to leakage, a liquid film is stable in property, and the plasticized polymer ionic liquid film has the ability of continuous and repeated application; and the plasticized polymer ionic liquid film and the method can be applied to industrial application of selective removal of the chromium (VI) in the chromium-containing wastewater.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and relates to a preparation method of a high-stability plasticized polymer ion liquid membrane containing a plasticizer, and its form of membrane extraction to selectively remove, separate and enrich low-concentration chromium ( VI) processing method. Background technique [0002] The industrial sources of chromium(VI)-containing wastewater are relatively abundant, but the presence of chromium(VI) in water will cause irreversible damage to the ecological environment. The discharge limit of industrial chromium is only 1mg / L, while the maximum allowable limit of chromium (VI) in inland waters and drinking water is 0.1 and 0.05mg / L respectively. Therefore, the treatment technology of wastewater containing chromium (VI) with a lower concentration but not up to the standard has always been a sensitive topic of concern in related industries. [0003] Traditional treatment methods for c...

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): C02F1/42C02F1/44C02F101/22
CPCC02F1/42C02F1/44C02F2101/22
Inventor 孟晓荣宋莹莹李佳文
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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