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A kind of method for promoting cationic organic molecule intercalation kaolinite

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

Active Publication Date: 2022-07-15
ZAOZHUANG SANXING ADVANCED MATERIALS
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  • 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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  • A kind of method for promoting cationic organic molecule intercalation kaolinite
  • A kind of method for promoting cationic organic molecule intercalation kaolinite
  • A kind of method for promoting cationic organic molecule intercalation kaolinite

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Embodiment 1

[0045] The methanol / kaolinite interlayer graft compound prepared rapidly by acid catalysis was mixed with 5% dilute hydrochloric acid according to the mass ratio of 1:1, the heating temperature was 70°C and placed in a single-necked flask for heating, and a condensing refluxer was added to the flask mouth, Heating for 60min. The suspension was then centrifuged and washed three times with methanol. During each washing, the mass ratio of the graft complex between the methanol / kaolinite layers to methanol was 2:1, and then centrifuged to obtain the pre-pickled methanol. The XRD measurements of the grafted composites between the kaolinite / kaolinite layers are 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 That is, the metal cation impurities adsorbed on the surface of kaolinite. Dissolve cetyltrimethylammonium bromide in methanol at a concentration of 1 mol / L. The pre-pickled methanol / kaolinite interlayer graft complex was mixed ...

Embodiment 2

[0047] The methanol / kaolinite interlayer graft compound prepared rapidly by acid catalysis is mixed with 25% dilute sulfuric acid in a mass ratio of 1:3, and the heating temperature is 90 ° C and placed in a single-neck flask for heating, and a condenser reflux device is added to the flask mouth, Heating for 30min. The suspension was then centrifuged and washed three times with methanol. During each washing, the mass ratio of the graft complex between the methanol / kaolinite layers to methanol was 10:1, and then centrifuged to obtain the pre-pickled methanol. The XRD measurements of the grafted composites between the kaolinite / kaolinite layers are 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 That is, the metal cation impurities adsorbed on the surface of kaolinite. The octadecylamine was dissolved in methanol at a concentration of 1 mol / L. The pre-pickled methanol / kaolinite interlayer graft complex was mixed with a methanol ...

Embodiment 3

[0049] The methanol / kaolinite interlayer graft compound prepared rapidly by acid catalysis was mixed with 10% dilute hydrochloric acid according to a mass ratio of 1:2, and the heating temperature was 80 °C and placed in a single-necked flask for heating, and a condenser reflux was added to the flask. Heating for 40min. The suspension was then centrifuged and washed three times with methanol. During each washing, the mass ratio of the graft complex between the methanol / kaolinite layers to methanol was 8:1, and then centrifuged to obtain the pre-pickled methanol. / Kaolinite interlayer graft complex. Dissolve cetyltrimethylammonium bromide in methanol at a concentration of 1 mol / L. The pre-pickled methanol / kaolinite interlayer graft complex was mixed with a methanol solution of cetyltrimethylammonium chloride according to a mass ratio of 1:20, and the reaction was carried out for 24 hours. The precipitate was collected by centrifugation, and washed with methanol to remove exc...

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Abstract

The invention belongs to the field of preparation of a kaolinite intercalation compound, in particular to a method for promoting cationic organic molecule intercalation kaolinite. The method includes pre-pickling in addition to the intercalation reaction. The pre-pickling is to mix and heat the graft complex between methanol / kaolinite layers with acid, then centrifuge, and then wash and centrifuge with methanol. After pre-pickling, the obtained centrifugal precipitate is subjected to intercalation reaction with cationic organic molecules to successfully prepare a cationic organic molecule / kaolinite intercalation complex, which solves the problem that cationic organic molecules cannot intercalate with acid catalysis The problem of rapidly prepared methanol / kaolinite interlayer grafted complexes. At the same time, this process has important research significance on the intercalation reaction mechanism of kaolinite.

Description

technical field [0001] The invention belongs to the field of preparation of a kaolinite intercalation compound, in particular to a method for promoting cationic organic molecule intercalation 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 lamellae are firmly bound together by hydrogen bonds, which makes kaolinite difficult to exfoliate. [0003] Liu Qinfu et al. used DMSO, urea, and N-methylformamide intercalated kaolinite complex as the precursor, mixed and stirred the precursor and methanol according to the mass 1:10, stirred at room temperature for 16 days, and replaced fresh methanol every day. , successfully prepared the grafted kaolinite complexes between methanol / kaolinite layers (Liu Qinfu, Zuo Xiaochao, Zhang Shilong, et al. Me...

Claims

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Application Information

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Patent Type & Authority Patents(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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