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Method for preparing long-chain alkylguanidine-modified attapulgite

A technology for modifying attapulgite and long-chain alkyl guanidine, which is applied in the field of attapulgite to achieve broad application prospects and the effect of improving utilization value and utilization rate

Inactive Publication Date: 2010-11-17
HUAIYIN TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most researches on organic modification are silane coupling agents and quaternary ammonium salts, but there is no report on modifying attapulgite with long-chain alkylguanidine. Long-chain alkylguanidine itself is also a kind of cationic surfactant. , because of its excellent bactericidal effect, easy preparation, low toxicity, and good cost performance, it has received extensive attention abroad.

Method used

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  • Method for preparing long-chain alkylguanidine-modified attapulgite
  • Method for preparing long-chain alkylguanidine-modified attapulgite
  • Method for preparing long-chain alkylguanidine-modified attapulgite

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0013] Example 1: Measurement and calculation of methyl orange decolorization rate

[0014] In a 250mL iodine flask, add 200mL of 50mg / L methyl orange solution, add modified attapulgite, shake in a water bath oscillator at room temperature and 200r / min for 30min, centrifuge, take the supernatant, and measure the absorbance at a wavelength of 462.9nm Value, calculate methyl orange decolorization rate; Decolorization rate R=(A 0 -A) / A 0 ×100%, where A 0 is the absorbance value of the original solution, and A is the absorbance value of the solution after adsorption.

example 2

[0015] Example 2: Effect of the type of long-chain alkylguanidine on adsorption performance

[0016] Add 20mL of 95% ethanol to three round-bottomed flasks respectively, and add dodecaguanidine sulfite, fourteenguanidine sulfite, and hexadecanidine sulfite to the round-bottomed flasks at a ratio of 40mmol / 100g of purified attapulgite. , 90W ultrasonic treatment for 40-70min, three parts of modified attapulgite were prepared, dried, ground, and sieved for use; measure the decolorization rate of methyl orange, and measure the unmodified attapulgite to methyl orange Decolorization rate, the results are shown in Table 1:

[0017] Table 1 Comparison of methyl orange decolorization rate between long-chain alkylguanidine modified attapulgite and original attapulgite

[0018]

[0019] The results show that the adsorption performance of attapulgite is significantly increased after modification with long-chain alkyl guanidine salts, and the modification effect of hexadecylguanidine ...

example 3

[0020] Example 3: The effect of the addition amount of long-chain alkylguanidine on the adsorption performance

[0021] Take hexadecanidine sulfite in proportions of 10mmol / 100g, 20mmol / 100g, 30mmol / 100g, 40mmol / 100g, 50mmol / 100g, 60mmol / 100g respectively, prepare six kinds of organically modified attapulgite, dry, Grind and sieve for later use; measure the absorbance value, and calculate the decolorization rate of methyl orange, and the results are shown in Table 2.

[0022] Table 2 The effect of the addition amount of long-chain alkylguanidine on the adsorption performance of modified soil

[0023]

[0024] The results show that the more hexadecanidine sulfite is added, the more obvious the modification effect of attapulgite is. When the amount of hexadecanidine sulfite is less, the change of the addition amount has a greater impact on the adsorption performance ; When the addition amount reaches 40mmol / 100g, continue to increase the addition amount of cetyl guanidine, a...

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Abstract

The invention discloses a method for preparing long-chain alkylguanidine-modified attapulgite, comprising the following steps: (1) attapulgite purification: firstly, immersing greenore attapulgite in water for 24 hours; then, preparing slurry from the attapulgite and the water which are at a ratio of 1:20, and stirring the slurry at a low speed with a stirrer for 24 hours; and finally, naturally standing the slurry, and filtering, drying and grinding upper suspension so as to prepare purified attapulgite; (2) attapulgite modification: firstly, preparing ethanol solution by using long-chain alkylguanidine; then, adding the purified attapulgite into the solution for the purpose of ultrasonic treatment, wherein the modification of 100g of purified attapulgite needs 40-50 mmol of long-chain alkylguanidine, the ultrasonic power of 90W, and the ultrasonic time of 40-70 min; and finally, filtering, washing, drying, grinding and screening so as to obtain the modified attapulgite. The modifiedattapulgite prepared by the method has good absorption performance and improves the utilization value and the utilization rate of the attapulgite greenore.

Description

technical field [0001] The invention relates to attapulgite, in particular to a preparation method of long-chain alkylguanidine modified attapulgite. Background technique [0002] Attapulgite is a porous chain-layered hydrous magnesium-aluminosilicate clay mineral mainly composed of attapulgite. Attapulgite, also known as palygorskite, is a typical nano-submicron non-metallic mineral, and its microstructure generally includes three levels: (1) Basic structural unit - microrod or fibrous single crystal, referred to as rod crystal; 2) Rod crystal bundles formed by the parallel aggregation of rod crystals, many parallel tunnel gaps are naturally formed between the parallel arranged nanorod crystal fibers; (3) Various aggregates formed by the accumulation of crystal bundles (including rod crystals) body. Attapulgite deposits with industrial significance are mainly distributed in a few countries such as the United States, China, and Spain. Jiangsu, Anhui and other provinces in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/40B01J20/10
Inventor 陈田田尹起范韦长梅
Owner HUAIYIN TEACHERS COLLEGE
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