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

Process for treatment of PTA refining wastewater through high-selectivity adsorbent

A highly selective and refined wastewater technology, applied in the field of water treatment, can solve the problems of long-term stable and effective operation of the process, erosion, etc., and achieve the effects of optimistic industrialization prospects, avoiding erosion and saving resources.

Inactive Publication Date: 2015-09-02
FUZHOU UNIV
View PDF1 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PTA refined wastewater contains organic pollutants and heavy metal ions at the same time. In the traditional "extraction-ultrafiltration reverse osmosis-adsorption" process, after the organic matter is recovered in the extraction process, the extractant PX will remain in the wastewater and erode the ultrafiltration reverse osmosis membrane. effect, causing the process to fail to operate stably and effectively for a long time

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
  • Process for treatment of PTA refining wastewater through high-selectivity adsorbent
  • Process for treatment of PTA refining wastewater through high-selectivity adsorbent
  • Process for treatment of PTA refining wastewater through high-selectivity adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Filled with 50mg / L p-xylene (PX), 30mg / LCo 2+ and Mn 2+ Add 0.1g of molecular sieves with a silicon-aluminum ratio of 25, 50, and 80 after adding cobalt acetate to the iodine measuring bottle of 100ml of waste water, shake it in a constant temperature (25 degrees Celsius) water bath oscillator at 200r / min for 240min, and then shake it at 4000r / min Centrifuge for 10 min under the condition of min, analyze PX concentration by headspace sampling-gas chromatography, and analyze metal concentration by atomic absorption spectrophotometer. The obtained modified molecular sieves with different masses have the following table for the selectivity and adsorption capacity of adsorbing PX.

[0029]

Embodiment 2

[0031] Filled with 50mg / L p-xylene (PX), 30mg / L Co 2+ and Mn 2+ Add 0.1g of molecular sieve with silicon-aluminum ratio of 25, 50, and 80 after adding manganese acetate to the iodine measuring bottle of 100ml of waste water, shake it in a constant temperature (25 degrees Celsius) water bath oscillator at 200r / min for 240min, and then shake it at 4000r / min Centrifuge for 10 min under the condition of min, analyze PX concentration by headspace sampling-gas chromatography, and analyze metal concentration by atomic absorption spectrophotometer. The obtained modified molecular sieves with different masses have the following table for the selectivity and adsorption capacity of adsorbing PX.

[0032]

Embodiment 3

[0034] Filled with 50mg / L p-xylene (PX), 30mg / L Co 2+ and Mn 2+ After adding ammonium chloride to the iodine measuring bottle of 100ml of waste water, 0.1g of molecular sieve with a silicon-aluminum ratio of 25, 50, and 80 was added, shaken at 200r / min in a constant temperature (25 degrees Celsius) water bath oscillator for 240min, and then heated at 4000r Centrifuge for 10 min under the condition of / min, analyze PX concentration by headspace sampling-gas chromatography, and analyze metal concentration by atomic absorption spectrophotometer. The obtained modified molecular sieves with different masses have the following table for the selectivity and adsorption capacity of adsorbing PX.

[0035]

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
adsorption capacityaaaaaaaaaa
adsorption capacityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a process for treatment of PTA refining wastewater through a high-selectivity adsorbent. The process comprises the following steps: extracting, selectively adsorbing p-xylene through the high-selectivity adsorbent, carrying out ultrafiltration and reverse osmosis and carrying out metal adsorption. The high-selectivity adsorbent is prepared through the following specific steps: uniformly mixing a silicon source, an aluminium source, a template agent and water according to a ratio, stirring for dissolving, transferring the mixture to a stainless steel crystallization kettle with a polytetrafluoroethylene liner, heating for crystallization, filtering, washing, drying and roasting so as to obtain an initial molecular sieve with good degree of crystallinity; deeply processing the initial molecular sieve, and forming to prepare into a strip-shaped high-selectivity molecular sieve. According to the process provided by the invention, the high-selectivity adsorbent is adopted to adsorb p-xylene in wastewater, the adsorption selectivity coefficient of p-xylene to cobalt ions can reach 7890 maximally, the adsorption selectivity coefficient of p-xylene to manganese ions can reach 9578 maximally and the adsorption capacity of p-xylene can reach 40 mg / g or above, so that erosion of p-xylene to a reverse osmosis membrance can be effectively avoided.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a process for treating PTA refined wastewater with a highly selective adsorbent. Background technique [0002] Molecular sieves are made of (Si, Al)O 4 The skeleton structure composed of tetrahedrons is full of cavities and channels in its space grid structure, which has a large openness and a huge internal surface area (400-800m 2 / g), and the balance cations on the zeolite framework are not tightly combined with the framework, and it is very easy to exchange with the cations in the aqueous solution, so it has good adsorption and exchange performance. When the main pore diameter is larger than or substantially the same as that of p-xylene, and the silicon-alumina ratio is so high that it contains less metal ions or contains H with stronger adsorption capacity + Or metal ions, when the exchange effect with the metal ions in the solution is weak, this makes it possible to sele...

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): C02F9/02C02F1/28C01B39/04B01J20/18B01J20/30C02F101/32
Inventor 王红星邱挺齐兆洋杨臣李玲黄智贤叶长燊
Owner FUZHOU UNIV
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