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Method for preparing poly-epoxychloropropane dimethylamine cation alta-mud

A polyepichlorohydrin, epichlorohydrin technology, applied in chemical instruments and methods, other chemical processes and other directions, to achieve the effects of stable quality, low cost and excellent adsorption performance

Inactive Publication Date: 2010-04-14
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the deficiencies in the current preparation method of organic bentonite, and provides polyepichlorohydrin dimethylamine cationic bentonite and a preparation method thereof

Method used

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  • Method for preparing poly-epoxychloropropane dimethylamine cation alta-mud
  • Method for preparing poly-epoxychloropropane dimethylamine cation alta-mud
  • Method for preparing poly-epoxychloropropane dimethylamine cation alta-mud

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The steps of preparing polyepichlorohydrin dimethylamine cationic bentonite by monomer insertion-interlayer polymerization method are as follows:

[0024] (1) Weigh 2.00g of dried sodium bentonite in a three-necked round-bottomed flask filled with 100mL of deionized water, and stir and disperse in a JJ-1 booster electric stirrer for 1h;

[0025] (2) Add 0.800 g of intercalation agent dimethylamine (dimethylamine is 2 / 5 of the mass of sodium bentonite used) to the above suspension, control the temperature and stir at 20°C for 2 hours to make it fully exchanged;

[0026] (3) Add epichlorohydrin quantitatively at a molar ratio of epichlorohydrin: dimethylamine=1:1, and ethylenediamine by mass ratio: (epoxychlorohydrin+dimethylamine)=2% quantitatively Add ethylenediamine and stir for 3h at a temperature of 65°C;

[0027] (4) Suction filter the reaction solution, wash the above-mentioned cationized bentonite with distilled water until the filtrate does not contain chloride ...

Embodiment 2

[0028] Embodiment 2: As described in Example 1, the difference is that the consumption of dimethylamine is 1 / 5 of the quality of sodium bentonite used, and the mol ratio of epichlorohydrin to dimethylamine is 1.25: 1, and ethylenediamine is added The amount is 1% of the total mass of epichlorohydrin and dimethylamine.

[0029] The polyepichlorohydrin dimethylamine polymer / bentonite prepared by the above steps is characterized, and the results are shown in table 1:

[0030] Table 1 Comparison of structural characteristics of bentonite and polyepichlorohydrin dimethylamine cationic bentonite

[0031]

[0032] From the above results, it can be seen that the interlayer spacing of polymer direct intercalation EPI-DMA / Bt is 1.4.1nm, which is 0.147nm larger than the 1.254nm of the original soil; the interlayer spacing of monomer insertion-interlayer polymerization EPI-DMA / Bt It is 1.456nm, which is 0.202nm larger than the original soil, and 0.055nm larger than the polymer solutio...

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Abstract

The invention relates to a preparation method for polyepichlorohydrin dimethylamine cation bentonite, belonging to the technical field of environmental protection; the preparation method prepares thepolyepichlorohydrin dimethylamine / bentonite by taking sodium bentonite as the raw material, dimethylamine, epichlorohydrin and quadrol as intercalation agents and adopting a monomer insertion-interlayer polymerization method. The product is milky white solid powder, which has around100mg / g of organic loading capacity, 1.456nm of interlayer spacing, 27.89m<2> / g of specific surface and more than 90percent of decoloration rate to reactive turquoise blue. The method of the invention has the advantages of reasonable design, simple technique, low cost, etc. The prepared polyepichlorohydrin dimethylamine cation bentonite has the advantages of stable product quality and excellent adsorption performance, which has high application value in the decoloration treatment of printing and dyeing wastewater.

Description

technical field [0001] The invention relates to a preparation method of polyepichlorohydrin dimethylamine cationic bentonite, which belongs to the technical field of environmental protection. Background technique [0002] Bentonite is a clay mineral with montmorillonite as the main component. It has a layered structure. Its crystal unit is composed of silicon-oxygen tetrahedron and aluminum-oxygen octahedron in a ratio of 2:1. The theoretical chemical composition is: Al 2 [Al x Si 4-x o 10 ](OH) 2 . There are cations (such as Fe 2+ , Fe 3+ , Mg 2+ 、Al 3+ ) Isomorphic substitution phenomenon, when the replacement cation is low-priced, the structure increases the equivalent negative charge, and the charge balance is compensated by the adsorption of other cations between the layers. These ions mainly include K + 、Na + , Li + , Ca 2+ etc., which makes it possible to exchange with other cations. At the same time, the surface of bentonite particles is hydrated due to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/30
Inventor 岳钦艳李静李倩原爱娟高宝玉
Owner SHANDONG UNIV
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