Preparation method of compound material for inhibiting oxidation corrosion by using potassium oleate modified metal sulfide

A metal sulfide and oxidation-inhibiting technology, which is applied in the fields of semiconductors and photochemistry, can solve problems such as terminal treatment cannot be completely treated, secondary pollutants cannot be solved, and heavy metals are difficult to reuse, etc., to achieve inhibition of excessive dissolution, inhibition of excessive oxidation, and process easily controlled effects

Inactive Publication Date: 2021-06-15
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

In recent years, terminal treatment has always been the main method to control AMD pollution, but its limitations have become increasingly obvious: first, the cost of treating pollution is too high; second, terminal treatment often cannot be completely treated, leaving secondary pollutants that cannot be resolved; third, terminal Heavy metals after treatment are difficult to be reused

Method used

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  • Preparation method of compound material for inhibiting oxidation corrosion by using potassium oleate modified metal sulfide
  • Preparation method of compound material for inhibiting oxidation corrosion by using potassium oleate modified metal sulfide

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Embodiment

[0017] A method for preparing a composite material that uses potassium oleate to modify metal sulfide to inhibit oxidation and corrosion, comprising the steps of:

[0018] (1) After the pyrite was ball milled for 5 minutes, passed through a 100-mesh sieve, washed five times with ultrapure water (volume 1:5), placed in a -20°C refrigerator for 12 hours, and then dried in a freeze dryer for 48 hours.

[0019] (2) Take potassium oleate and configure it into 5% (volume ratio) with ultrapure water, then take 1mL and 0.5g of pyrite samples into a 50mL beaker, shake the beaker so that the sample is evenly spread on the bottom of the beaker, put The composite material was obtained after drying in a fume hood.

[0020] (3) Carry out pyrite ion leaching experiment in the hydrochloric acid solution of pH=2, gained solution is filtered with 0.45 μ m filter membrane, uses the content of iron ion in the solution of spectrophotometric measurement, uses ion chromatography to measure the conte...

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Abstract

The invention relates to a preparation method of a composite material for inhibiting oxidation corrosion by using potassium oleate modified metal sulfide, and belongs to the technical field of surface passivation. The preparation method comprises the following steps of ball-milling pyrite for 5 minutes, sieving with a 100-mesh sieve, washing with ultrapure water (volume: 1: 5) for five times, refrigerating in a refrigerator at-20 DEG C for 12 hours, drying in a freeze dryer for 48 hours, preparing potassium oleate into 5% (volume ratio) by using ultrapure water, putting 1mL and 0.5 g of pyrite samples into a 50mL beaker, shaking the beaker to uniformly spread the samples at the bottom of the beaker, and drying in a fuming cupboard to obtain the composite material. The composite material can be applied to oxidation of surface-passivated pyrite; under the simulated sunlight condition, pyrite oxidation is inhibited in a hydrochloric acid solution with the pH value of 2, and the inhibition rate can reach 80%.

Description

technical field [0001] The invention relates to semiconductors and photochemistry, in particular to a method for preparing a composite material that uses potassium oleate to modify metal sulfides to inhibit oxidation and corrosion, and belongs to the technical field of surface passivation. Background technique [0002] Pyrite (FeS 2 ) is a common mineral in nature. In the chemical structure of pyrite, Fe and S elements are combined with O 2 and H 2 O undergoes a series of redox reactions, leading to acidification of water and soil, and easily forms acid mine wastewater (AMD). A large amount of pyrite exists in mine tailings, and the associated toxic and harmful elements such as Pb, Cd, Cu, As, Hg, Tl in the tailings are released along with AMD, and these elements migrate and transform in the environment and pass through the chemical circle Circulation and food chains endanger human and animal life and health. [0003] Over the past few decades, various techniques have be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00
CPCC22B1/00
Inventor 张文龙舒小华李春花林海雁田伟
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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