Oil absorbent prepared from low grade diatomite and preparation method thereof

A diatomaceous earth and oil-absorbing agent technology, which is applied in the direction of separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of occupying large areas of forest land and agricultural land, waste of resources in the environment, and disorderly stacking, so as to facilitate recycling and Effects of post-processing, low bulk density, and low cost

Inactive Publication Date: 2013-08-21
任象玉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims at the problems existing in the above-mentioned traditional technologies, and through the comprehensive utilization and development of low-grade diatomite resources, it produces diatomite oil-absorbing diatomite which is localized, cheap, fast in oil absorption, suitable in use temperature, and intensively managed. It solves the problem of low-grade diatomite discarded or piled up disorderly after harvesting, occupying a large area of ​​forest land and agricultural land, causing great waste of resources and environmental pollution, and turning low-grade diatomite solid waste into waste Bao, another object of the present invention is to provide the preparation method of above-mentioned diatomite oil-absorbing agent

Method used

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  • Oil absorbent prepared from low grade diatomite and preparation method thereof
  • Oil absorbent prepared from low grade diatomite and preparation method thereof
  • Oil absorbent prepared from low grade diatomite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] ①. Select low-grade diatomite, see Table 1-1 for physical and chemical indicators, and reserve.

[0029]

[0030] ②. Crush and pulverize the diatomaceous earth in step ①, with an average particle size of 22μ.

[0031] ③. Take 200g of diatomite crushed in the above step ②, add 600ml of water, add sulfuric acid, the acid dosage is 110g of 96% sulfuric acid, the temperature of water bath is 100℃, stir for 3h for acidification reaction, add 600ml of water, stir for 1h, settle Suction filtration to obtain 170 g of acidified diatomite.

[0032] ④. Take 125g of acidified diatomite in step ③, add 500 ml of water, the liquid-solid ratio is 4, repeatedly stir, filter, repeat washing 3 times, each time for 20 minutes, and suction filter to obtain 105g of acidified washed diatomite.

[0033] ⑤. Dry 100 g of acidified and washed diatomaceous earth in step ④ at 110±5°C for 1 hour.

[0034] 6. Take 60 g of diatomite treated in the above steps 5. Add 1.8 g of Na 2 CL (industrial ...

Embodiment 2

[0041] ①. Select low-grade diatomite, see Table 2-1 for physical and chemical indicators, and reserve.

[0042]

[0043] ②. Crush and pulverize the diatomaceous earth in step ①, with an average particle size of 24μ.

[0044] ③. Take 400g of the pulverized diatomite in the above step ②, add 1200ml of water, add sulfuric acid, the acid dosage is 220g of 96% sulfuric acid, the temperature of the water bath is 100°C, stir for 3h for acidification reaction, add 1200ml of water, stir for 1h, settle and pump Filter to obtain 350 g of acidified diatomaceous earth.

[0045] ④. Take 300g of acidified diatomite in step ③, add 1200 ml of water, the liquid-solid ratio is 4, repeatedly stir, filter, repeat washing 3 times, each time for 20 minutes, and suction filter to obtain 273g of acidified washed diatomite.

[0046] ⑤. Dry the acidified and washed diatomaceous earth in step ④ at 110±5°C for 1 hour.

[0047] 6. Take 200g of diatomite treated in the above steps 5. Add 8g of Na 2 CL (...

Embodiment 3

[0053] ①. Select low-grade diatomite, see Table 3-1 for physical and chemical indicators, and reserve.

[0054]

[0055] ②. Crush and pulverize the diatomaceous earth in step ①, with an average particle size of 21μ.

[0056] ③. Take 400g of diatomite pulverized in the above step ②, add 1200 ml of water, add sulfuric acid, the amount of acid is 220g of 96% sulfuric acid, the temperature of water bath is 100°C, stir for 3h for acidification reaction, add 1200ml of water, stir for 1h, settle Suction filtration to obtain 344 g of acidified diatomaceous earth.

[0057] ④. Take 300g of acidified diatomite in step ③, add 1200 ml of water, the liquid-solid ratio is 4, repeatedly stir, filter, repeat washing 3 times, each time for 20 minutes, and suction filter to obtain 260g of acidified washed diatomite.

[0058] ⑤. Dry the acidified and washed diatomaceous earth in step ④ at 110±5°C for 1 hour.

[0059] 6. Take 200g of diatomite treated in the above step 5. Add 10g of Na 2 CL ...

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Abstract

The invention relates to a preparation method of an oil absorbent, in particular to a method for preparing the oil absorbent from low grade diatomite. The preparation method comprises the following 9 steps of: low grade diatomite raw material selection, crushing, acidification treatment, washing, drying, adding of the assistant (3%-5%) Na2Cl (industrial salt) and mixing, roasting at 750-850DEG C, breaking winnowing, and adding of the silane coupling agent KH-550 (gamma-aminopropyl triethoxysilane, Nanjing Union silicon Chemical Co., LTD. 5%-7%) to conduct modification treatment, thus obtaining the particle and powder diatomite oil absorbent. The oil absorbent has simple and easy preparation method, wide raw material sources and low cost, solves the current solid waste pollution problem of low grade diatomite, opens up a new way for low grade diatomite application, and realizes recycling of waste materials. The oil absorbent has good selectivity, strong absorptivity up to 500% of its own weight, rapid oil absorption speed, small oil absorbent stacking density, a melting point of 1450DEG C, and a high use temperature, and can float on the water surface before and after oil absorption, thus being convenient for recovery and post-treatment.

Description

technical field [0001] The invention relates to an oil-absorbing agent and a preparation method thereof, in particular to an oil-absorbing agent prepared by using low-grade diatomite and a method thereof. Background technique [0002] As we all know, oil entering the marine environment will have a certain impact on certain chemical substances in seawater during the process of oxidation and dissolution. The dissolution of oil can lead to an increase in the content of carbon dioxide and organic matter in seawater, while the content of dissolved oxygen will drop sharply. In addition, in the process of bacteria decomposing oil, a large amount of oxygen needs to be consumed. Normally, 1 liter of oil is completely oxidized, and it needs to consume 400,000 liters of dissolved oxygen in seawater. Therefore, a large-scale oil pollution incident often It can cause severe hypoxia in a large area of ​​the sea, to seawater hypoxia, death of marine organisms, and serious harm to marine or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/14B01J20/30C02F1/40
Inventor 任象玉
Owner 任象玉
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