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A kind of modified montmorillonite composite adsorption material and its preparation method and application

A technology of composite adsorption material and montmorillonite, which is applied in the field of modified montmorillonite composite adsorption material and its preparation, can solve the problems of small specific surface area and easy pulverization, and achieve unique void structure, low cost, adsorption and desorption fast speed effect

Active Publication Date: 2021-04-23
NANJING FORESTRY UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, montmorillonite has defects such as surface hydrophilicity, small specific surface area, and easy pulverization, so its direct application to VOCs waste gas treatment has certain limitations.

Method used

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  • A kind of modified montmorillonite composite adsorption material and its preparation method and application
  • A kind of modified montmorillonite composite adsorption material and its preparation method and application
  • A kind of modified montmorillonite composite adsorption material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1

[0027] Weigh 1.39g SR wood pulp fiber with beating degree of 42°, 0.19g special fiber (50μm in diameter, 11mm in length), 0.42g polyvinyl alcohol, 9.07g modified montmorillonite, 1.59g magnesium hydroxide, 2.68kg water, The components were mixed and dispersed with a stirrer for 35 minutes. Put the uniformly dispersed mixed material into a water filter machine to form and dry to obtain product 1.

[0028] Two comparative products were prepared using the same formula and process above, namely comparative product 2 and comparative product 3, wherein comparative product 2 used polyester fiber instead of special fiber, and comparison 3 used glass fiber instead of special fiber. Detect the physical and chemical properties of each product;

[0029] The combustion performance of the material is tested by a horizontal and vertical combustion tester (implementing the US UL94 standard), and the specific surface area of ​​the material is tested by a high flame-retarda...

Embodiment 2

[0034] Weigh 3.1g SR wood pulp fiber with a beating degree of 34°, 0.69g special fiber (diameter 6μm, length 8mm), 0.85g chitosan, 8.17g modified montmorillonite, 0.63g melamine phosphate, 31.6kg water, each Dispersion was carried out with a stirrer for 30 minutes after the components had been mixed. Put the uniformly dispersed mixture into a water filter machine to form and dry to obtain product 2.

Embodiment 3

[0036] Weigh 5.29g SR wood pulp fiber with beating degree of 51°, 1.04g special fiber (diameter 90μm, length 4mm), 0.74g starch, 4.57g modified montmorillonite, 1.02g magnesium phosphate, 18.2kg water, each component After mixing, disperse with a stirrer for 20 minutes, put the uniformly dispersed mixture into a water filter, filter and shape it, and dry it to obtain product 3.

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PUM

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Abstract

The invention discloses a modified montmorillonite composite adsorption material and its preparation method and application. The composite adsorption material is made of modified montmorillonite, special fiber, water-insoluble flame retardant and adhesive, which not only reduces The material cost is reduced, and it also has a good flame retardant effect. The composite adsorption material has the advantages of modified montmorillonite, special fiber and water-insoluble flame retardant, and has high flame retardancy, good hydrophobicity, and good thermal stability. , good chemical stability, unique pore structure, high mechanical strength, not easy to pulverize, adjustable gas channels, wide application range, etc., can be widely used in the adsorption and purification treatment of various VOCs waste gases. The invention has wide sources of raw materials, simple invention process, and can be freely processed into fiber products of different shapes. It has strong adsorption capacity, in-situ regeneration and recycling, and fast adsorption / desorption rate in the application of fixed bed adsorption and rotary adsorption. , small pressure drop and high safety.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a modified montmorillonite composite adsorption material and its preparation method and application. Background technique [0002] VOCs (volatile organic compounds) refer to organic compounds with a saturated vapor pressure greater than 70Pa at normal temperature and a boiling point below 260°C at normal pressure. Conventional VOCs purification methods mainly include: adsorption method, combustion method, absorption method, condensation method, biological method, etc. Among them, the adsorption method has the advantages of mature technology, easy operation, low energy consumption, low cost and high removal rate, and is widely used in VOCs treatment with low concentration and large air volume. [0003] Montmorillonite is the main component of bentonite and is a layered silicate. As a VOCs adsorbent, it has the following advantages: (1) large reserves and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01D53/02B01J20/30
CPCB01D53/02B01D2257/708B01J20/0248B01J20/0292B01J20/08B01J20/12B01J20/22B01J20/24
Inventor 付博田建昌周乔
Owner NANJING FORESTRY UNIV