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Multifunctional chelating cellulose and application thereof

A cellulose and multi-functional technology, applied in other chemical processes, water/sludge/sewage treatment, material inspection products, etc., can solve the problems of difficult recycling, complex use conditions, high production costs, etc., and achieve simple manual operation Ease of operation, less waste, and low price

Inactive Publication Date: 2011-11-02
HUAIHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently widely used heavy metal ion separation, enrichment, and recovery methods have problems such as large investment in equipment required, high energy consumption for the production of enriched and recycled materials, high production costs, complex use conditions, difficult recycling, and even secondary pollution.

Method used

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  • Multifunctional chelating cellulose and application thereof
  • Multifunctional chelating cellulose and application thereof
  • Multifunctional chelating cellulose and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 Preparation, properties and application of I-M-1 type multifunctional chelated cellulose

[0035] Step 1 Preparation of chloropropanol cellulose

[0036]

[0037] Weigh 100 grams of commercially available dry pulp cellulose and 230 grams of ethyl acetate, stir together and heat up at 80 to 95 °C for 4 hours and swell for 4 hours, then add 1.3 grams of catalyst 1.3 grams of boron trifluoride ether solution, drop 32 grams of epichlorohydrin , and react for 1 hour. Pressed, filtered, taken out, and dried to obtain 131.3 g of chloropropanol cellulose. Elemental analysis showed that the chlorine content was 9.97%.

[0038] Step 2: Preparation of dimethylaminopropanol cellulose

[0039]

[0040] The chloropropanol cellulose obtained in step 1 is put into 350 grams of dimethylamine aqueous solution with a concentration of 40% by mass, and the temperature is stirred and heated to 60-65° C. for 48 hours. The solid-phase reaction product was removed by pressing a...

Embodiment 2

[0048] Example 2 Preparation of I-M-2 type multifunctional chelated cellulose

[0049]

[0050] Taking the salicylaldehyde methylate cellulose and o-aminophenol obtained in Step 3 of Example 1 as raw materials, and adopting the operation method of Step 4 of Example 1, an orange-yellow I-M-2 type multifunctional chelated cellulose was prepared. The fluorescence emission of I-M-2 multifunctional chelated cellulose in DMF solution was λmax=512nm. Use Zn 2+ , Pb 2+ or Cu 2+ After leaching I-M-2 multifunctional chelated cellulose with ionic aqueous solution, the fluorescence intensity of I-M-2 multifunctional chelated cellulose was obviously enhanced. I-M-2 multifunctional chelated cellulose to other Na + , K + , Mg 2+ , Ca 2+ , Ba 2+ Isofluorescence intensity does not change, I-M-2 multifunctional chelated cellulose adsorbs Hg 2+ , Cd 2+ or Cr 3+ Then, the fluorescence of I-M-1 multifunctional chelated cellulose was quenched.

Embodiment 3

[0051] Example 3 Preparation of I-M-3 type multifunctional chelated cellulose

[0052]

[0053] Taking the salicylaldehyde methylate cellulose and 8-aminoquinoline obtained in step 3 of Example 1, and adopting the operation method of step 4 of Example 1, bright orange-red I-M-3 multifunctional chelated cellulose was prepared.

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Abstract

The invention provides multifunctional chelating cellulose. A Schiff<,>s base is supported on the multifunctional chelating cellulose. Because the Schiff<,>s base has fluorescence emission characteristic, in particular, presents phenomenon of fluorescence enhancement, fluorescence quenching and coloration difference during forming coordination compounds with different heavy metal ions, the heavy metal ions in various water systems can be in situ identified, real-timely detected, analyzed and separated. In addition, the heavy metal ions adsorbed by the chelating cellulose material can be desorbed conveniently through sodium sulphide, and the chelating cellulose material regenerates, such that the chelating cellulose material can be used circularly and is safe and effective. According to the present invention, the multifunctional chelating cellulose is convenient for activated sludge tanks of industrial and mining enterprises to recover heavy metal ions.

Description

technical field [0001] The invention relates to a functional polymer material, in particular to a multifunctional chelated cellulose polymer material loaded with Schiff bases and quaternary ammonium salts, which can be applied to the detection, analysis, separation and enrichment of various heavy metal ions in water systems, belonging to functional materials. technical background [0002] With the modernization of industrial production, it contains a variety of metal ions Na + , K + , Mg 2+ , Ca 2+ , Al 3+ , Zn 2+ , Ba 2+ , Hg 2+ , Cd 2+ , Pb 2+ , Cr 3+ , Cu 2+ , Se 2+ or As 3+ A large amount of waste water such as the need to be discharged into rivers, lakes or oceans, especially the heavy metal ions Hg in the waste water 2+ , Cd 2+ , Pb 2+ , Cr 3+ , Cu 2+ , Zn 2+ and As 3+ It has caused serious pollution to the ecological environment of the earth's surface. Therefore, the detection, analysis, separation, enrichment, and recycling of heavy metal ions in...

Claims

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Application Information

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IPC IPC(8): C08B15/06C02F1/28C02F1/62B01J20/24G01N33/18
Inventor 马娟娟王佳佳刘霖张田林
Owner HUAIHAI INST OF TECH
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