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Hydrophobic modification method for expanded perlite

A technology of expanded perlite and hydrophobic modification, which is applied in separation methods, chemical instruments and methods, and separation of immiscible liquids, etc., to achieve the effects of low preparation cost, simple preparation method, and easy industrialization

Inactive Publication Date: 2017-10-24
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Expanded perlite has the characteristics of light weight and thermal insulation. At present, expanded perlite is mainly used in building materials and thermal insulation materials in my country, but there are few reports on its hydrophobic modification and use in oil-water separation.

Method used

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  • Hydrophobic modification method for expanded perlite
  • Hydrophobic modification method for expanded perlite
  • Hydrophobic modification method for expanded perlite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: Surface modification of expanded perlite and characterization of hydrophobic expanded perlite

[0033] This embodiment provides a method for hydrophobic modification of expanded perlite, the specific steps are as follows:

[0034] Step 1: Sieve the expanded perlite particles to remove the fine sand;

[0035] Step 2: Wash the expanded perlite obtained in step 1 with distilled water for 3 to 5 times;

[0036] Step 3: drying the expanded perlite obtained in Step 2 at 120°C to constant weight;

[0037] Step 4: Take 0.5 g of the expanded perlite with constant weight in Step 3 in a polydimethylsiloxane solution (6 wt%) diluted with 10 ml of toluene, stir it well, and let it stand for 1 hour;

[0038] Step 5: Connect the condensing device and the recovery device, and pass the condensed water;

[0039] Step 6: Put the reactor containing the mixture in Step 4 in a water bath at 100° C. for 12 hours to obtain hydrophobic expanded perlite.

[0040] The expanded p...

Embodiment 2

[0043] Example 2: Adsorption properties of hydrophobic expanded perlite to oil and organic solvents

[0044] Weigh 0.1g of hydrophobic expanded perlite to measure its adsorption performance to oil and organic solvent respectively, and calculate its percentage of adsorption to oil and organic solvent through the mass change before and after adsorption, see Figure 4 . Oil and organic solvents include vegetable oil, lubricating oil, dodecane, decane, octane, n-hexane, benzene, toluene, nitrobenzene, chloroform, phenol, N,N-dimethylamide, dimethyl sulfoxide , methanol, ethanol, acetone. This embodiment has measured the adsorption performance of hydrophobic expanded perlite to oil and organic solvent, from Figure 4 It can be seen from the figure that the adsorption capacity of hydrophobic expanded perlite to oil and organic solvents is between 215% and 485%, among which the adsorption capacity of carbon tetrachloride and chloroform exceeds 450% and 484% respectively, showing th...

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Abstract

A hydrophobic modification method for expanded perlite comprises steps as follows: (1) expanded perlite granules are sieved, and fine sand in the expanded perlite granules is removed; (2) the expanded perlite obtained in the step (1) is washed 3-5 times with distilled water; (3) the expanded perlite obtained in the step (2) is dried at 120 DEG C until the weight of the expanded perlite is constant; (4) the expanded perlite reaching the constant weight in the step (3) is put into a dimethyl siloxane solution diluted by methylbenzene, and the mixture is stirred uniformly and sufficiently and then left to stand for 1 h; (5) a condensation device and a recycling device are connected, and condensate water is introduced; (6) a round-bottom flask containing the mixture in the step (4) is subjected to a water bath at the temperature of 100 DEG C for 12 h, and hydrophobic expanded perlite is obtained.

Description

technical field [0001] The invention belongs to the field of environmental protection materials, and in particular relates to the technology of hydrophobic modification of expanded perlite. Background technique [0002] Perlite is a dense, massive, acidic glassy lava that erupts from a volcano. Volcanic lava is condensed due to rapid cooling, and its crystal structure does not have enough time to grow, so it cools rapidly to form glassy rock, which is named for its structure with pearly cracks. my country is rich in perlite resources. According to the mine crushing process, equipment conditions and the particle size requirements of the traditional expanded perlite production process, the processing of perlite is limited to ore sand between 20 and 100 mesh, and the rest of the fine powder is discarded as tailings. Not only caused a waste of resources, but also seriously polluted the environment. [0003] There is no significant difference in the physical properties and chemi...

Claims

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Application Information

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IPC IPC(8): B01D17/022C04B14/18
CPCB01D17/02C04B14/185
Inventor 赵霞李亚斌雒和明冯辉霞李响张航胡涛
Owner LANZHOU UNIVERSITY OF TECHNOLOGY