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Method for promoting intercalation of cationic organic molecules in kaolinite

An organic molecule and cationic technology, applied in the field of preparation of kaolinite intercalation complex, can solve problems such as inability to intercalate

Active Publication Date: 2019-08-16
ZAOZHUANG SANXING ADVANCED MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the inventors found in subsequent research that cationic long-chain organic molecules can only intercalate the methanol / kaolinite interlayer graft complex prepared by the traditional washing process, but cannot intercalate acids such as those described in CN201710516945.2. Methanol / kaolinite layer-to-layer graft composite prepared by catalytic rapid preparation process, although both have identical XRD and IR patterns

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  • Method for promoting intercalation of cationic organic molecules in kaolinite
  • Method for promoting intercalation of cationic organic molecules in kaolinite
  • Method for promoting intercalation of cationic organic molecules in kaolinite

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Effect test

Embodiment 1

[0045] Mix the methanol / kaolinite layer-to-layer graft composite rapidly prepared by acid catalysis with 5% dilute hydrochloric acid in a mass ratio of 1:1, heat in a single-necked flask at a heating temperature of 70°C, and add a condensing reflux device at the mouth of the flask. Heat for 60min. The suspension was then centrifuged, washed three times with methanol, and the mass ratio of the methanol / kaolinite graft complex to methanol was 2:1 for each wash, and then centrifuged, and the resulting precipitate was pre-acid-washed methanol / kaolinite interlayer graft composite, the measured XRD is shown in Table 1. where Fe 2 o 3 , MgO, CaO, Na 2 O, K 2 O, TiO 2 ,P 2 o 5 , MnO, ZrO 2 It is the metal cation impurities adsorbed on the surface of kaolinite. Dissolve cetyltrimethylammonium bromide in methanol to a concentration of 1 mol / L. Mix the pre-acid-washed methanol / kaolinite layer-to-layer graft compound with a methanol solution of cetyltrimethylammonium chloride ...

Embodiment 2

[0047] Mix the methanol / kaolinite layer-to-layer graft composite rapidly prepared by acid catalysis with 25% dilute sulfuric acid at a mass ratio of 1:3, heat it in a single-necked flask at a heating temperature of 90°C, and add a condensing reflux device at the mouth of the flask. Heat for 30min. The suspension was then centrifuged, washed three times with methanol, and the mass ratio of the methanol / kaolinite graft complex to methanol was 10:1 for each wash, and then centrifuged, and the resulting precipitate was pre-acid-washed methanol / kaolinite interlayer graft composite, the measured XRD is shown in Table 1. where Fe 2 o 3 , MgO, CaO, Na 2 O, K 2 O, TiO 2 ,P 2 o 5 , MnO, ZrO 2 It is the metal cation impurities adsorbed on the surface of kaolinite. Dissolve octadecylamine in methanol at a concentration of 1 mol / L. Mix the pre-acid-washed methanol / kaolinite layer-to-layer graft composite with methanol solution of octadecylamine at a mass ratio of 1:20, and reac...

Embodiment 3

[0049] Mix the methanol / kaolinite layer-to-layer graft composite rapidly prepared by acid catalysis with 10% dilute hydrochloric acid in a mass ratio of 1:2, heat it in a single-necked flask at a heating temperature of 80°C, and add a condensing reflux device at the mouth of the flask. Heat for 40min. Then the suspension was centrifuged, washed three times with methanol, and the mass ratio of the methanol / kaolinite graft complex to methanol was 8:1 in each wash, and then centrifuged, and the resulting precipitate was pre-acid-washed methanol / Grafted complex between layers of kaolinite. Dissolve cetyltrimethylammonium bromide in methanol to a concentration of 1 mol / L. Mix the pre-acid-washed methanol / kaolinite layer-to-layer graft compound with a methanol solution of cetyltrimethylammonium chloride at a mass ratio of 1:20, and react for 24 hours. The precipitate was collected by centrifugation, rinsed with methanol, and excess cetyltrimethylammonium bromide was removed to ob...

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Abstract

The invention belongs to the field of preparation of kaolinite intercalation complexes, and particularly relates to a method for promoting the intercalation of cationic organic molecules in kaolinite.The method comprises an intercalation reaction and pre-acid washing, wherein the pre-acid washing comprises: carrying out mixing heating on a methanol / kaolinite interlayer graft complex and an acid,carrying out centrifugation, washing with methanol, and carrying out centrifugation. According to the present invention, after the pre-acid washing, the obtained centrifugal precipitate and the cationic organic molecules are subjected to the intercalation reaction to successfully prepare the cationic organic molecule / kaolinite intercalation complex, such that the problem that the cationic organicmolecule cannot be intercalated into the methanol / kaolinite interlayer graft complex obtained by the acid catalyzed rapid preparation is solved; and the process has important research significance inthe intercalation reaction mechanism of kaolinite.

Description

technical field [0001] The invention belongs to the field of preparation of kaolinite intercalation complex, in particular to a method for promoting cationic organic molecule intercalation into kaolinite. Background technique [0002] As a non-metallic clay mineral with abundant reserves and low price, kaolinite is widely used in the fields of loading, catalysis, coatings, rubber and plastic fillers, etc. Its structure is a typical 1:1 layered silicate mineral, and two adjacent sheets are firmly bound together by hydrogen bonds, which makes it difficult to exfoliate kaolinite. [0003] Liu Qinfu et al. used DMSO, urea, and N-methylformamide intercalated kaolinite composite as the precursor, mixed the precursor with methanol at a ratio of 1:10, stirred at room temperature for 16 days, and replaced fresh methanol every day. , successfully prepared methanol / kaolinite intercalated kaolinite composites (Liu Qinfu, Zuo Xiaochao, Zhang Shilong, etc. Mechanism of displacement inter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/44
CPCC01B33/44
Inventor 吉雷波张学法张士龙曹伟刘磊华振
Owner ZAOZHUANG SANXING ADVANCED MATERIALS
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