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Multielement modified bentonite adsorption material and preparation method thereof

An adsorption material, bentonite technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as rare research, and achieve the effect of reducing residual concentration, high thermal stability, and improving adsorption selectivity

Inactive Publication Date: 2016-02-03
LANZHOU JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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  • Multielement modified bentonite adsorption material and preparation method thereof
  • Multielement modified bentonite adsorption material and preparation method thereof
  • Multielement modified bentonite adsorption material and preparation method thereof

Examples

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Embodiment 1

[0026] (1) Preparation of inorganic polymeric hydroxyaluminum cation propping agent: Slowly add 0.4mol / L NaOH solution to 6 times the volume of 1.0mol / LAlCl at 60°C under constant stirring within 3 hours 3 solution, so that OH in the mixed solution - with Al 3+ The molar ratio of the solution is 1:2.4; after the dropwise addition, continue to stir for 3 hours, and then age the resulting solution at 60°C for 24 hours to obtain the inorganic polymeric hydroxyaluminum cationic proppant;

[0027] (2) Preparation of multi-component composite pillaring agent: mix CTAB, DTPA and inorganic polymeric hydroxyl aluminum cationic pillaring agent (the molar ratio of DTPA to CTAB is 1:1, and the total amount of DTPA and CTAB is 0.85mmol / g bentonite ; The dosage of the inorganic polymerized hydroxyl aluminum cationic propping agent is: 6mmol / g bentonite), stirring for 2 hours, to obtain a multi-component composite propping agent;

[0028] (3) Preparation of multi-component modified bentoni...

Embodiment 2

[0030] (1) Preparation of inorganic polymerized hydroxyaluminum cationic propping agent: firstly, 0.5mol / L Na 2 CO 3 Slowly add 3 times the volume of 1.0mol / LAlCl to the solution 3 solution, so that OH in the mixed solution - with Al 3+ The molar ratio is 2.4:1, after the dropwise addition is completed; after continuing to stir for 4 hours, age at 80°C for 36 hours to obtain an inorganic polymeric hydroxyaluminum cationic proppant;

[0031] (2) Preparation of multi-component composite pillaring agent: mix CTAB, DTPA and inorganic polymeric hydroxyl aluminum cationic pillaring agent (the molar ratio of DTPA and CTAB is 1:1.5, and the total amount of DTPA and CTAB is 0.85mmol / g bentonite ; The dosage of the inorganic polymerized hydroxyl aluminum cationic propping agent is: 6mmol / g bentonite), stirring for 2 hours, to obtain a multi-component composite propping agent;

[0032] 3. Preparation of multi-component modified bentonite adsorption material: Weigh 3.0 g of sodium-bas...

Embodiment 3

[0034] (1) Preparation of inorganic polymeric hydroxyaluminum cationic propping agent: Slowly add 0.4mol / L NaOH solution to 6 times the volume of 1.0mol / LAlCl at 60°C under constant stirring within 3 hours 3 solution, so that OH in the mixed solution - with Al 3+ The molar ratio is 1:2.4. After the dropwise addition, continue to stir for 3 hours, and then age the resulting solution at 60°C for 24 hours to obtain the inorganic polymeric hydroxyl metal cation propping agent;

[0035] (2) Preparation of multi-component composite pillaring agent: mix CTAB, DTPA and inorganic polymeric hydroxyl aluminum cationic pillaring agent (the molar ratio of DTPA and CTAB is 1:0.35, and the total amount of DTPA and CTAB is 1.03mmol / g bentonite ; The dosage of the inorganic polymerized hydroxyl aluminum cationic propping agent is: 6mmol / g bentonite), stirring for 2 hours, to obtain a multi-component composite propping agent;

[0036] (3) Preparation of multi-component modified bentonite adso...

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Abstract

The invention discloses a multielement modified bentonite adsorption material and belongs to the technical field of composite materials and water treatment. Sodium bentonite as a main material is modified by a multielement composite modifier containing an organic long carbon chain cationic surfactant, inorganic polyhydroxyl-based metal cations and a functional short carbon chain organic complexing agent by a copolymerization method to form the organic-inorganic multielement composite bentonite adsorption material. The organic-inorganic multielement composite bentonite adsorption material has porous and large specific surface area characteristics of inorganic pillared bentonite and high carbon content and strong hydrophobicity characteristics of organic bentonite and has strong metal ion complexation and adsorption functions of bentonite and thus organic matters can be adsorbed by surface adsorption and distribution and heavy metal ions in water can be removed by complexation. The organic-inorganic multielement composite bentonite adsorption material can be popularized and used in the waste water treatment field.

Description

technical field [0001] The invention relates to a modified bentonite adsorption material, in particular to a kind of organic long carbon chain cationic surfactant, an inorganic polymerized hydroxyl metal cation and a functionalized short carbon chain organic complexing agent as a multi-component composite modifier. The invention relates to the preparation of a multi-component modified adsorption material, which belongs to the field of composite materials and the field of water treatment. Background technique [0002] Bentonite has a promising application prospect as a low-cost adsorbent in water treatment. Bentonite is not only rich in reserves, but also cheap and easy to obtain. Through proper modification of bentonite, its adsorption performance can be significantly improved, and it has potential application prospects in wastewater treatment. Different modifiers are used in the modification, the interlayer structure and surface properties of the modified bentonite will be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30
Inventor 孙银霞任宗礼李春宇李新然
Owner LANZHOU JIAOTONG UNIV
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