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Adsorbent and method for producing same and adsorption molded article

A technology of adsorption materials and rare earth compounds, applied in chemical instruments and methods, other chemical processes, inorganic chemistry, etc., can solve problems such as low concentration and strictness

Inactive Publication Date: 2021-06-04
MITSUI MINING & SMELTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, the wastewater treatment standards for harmful substances and pollutants have become stricter due to social requirements. Although Japan’s fluorine wastewater standards are currently (as of October 2018) set below 8ppm, it may still be applicable in the future Lower Concentration Standard

Method used

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  • Adsorbent and method for producing same and adsorption molded article
  • Adsorbent and method for producing same and adsorption molded article
  • Adsorbent and method for producing same and adsorption molded article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Cerium carbonate (manufactured by Nippon Yttrium Co., Ltd., average particle size: 56 μm) was wet pulverized and then heated at 140° C. in air for 12 hours to obtain an adsorbent composed of cerium compound particles.

[0074] With regard to the obtained adsorbent, use a powder X-ray diffractometer (RINT-TTRIIII, manufactured by Rigaku Co., Ltd.), and scan with an output of 50 kV, 300 mA, a measurement range (°) of 10 to 80°, and a step width of 0.01°. The speed is 0.2° / min, the incident slit (°) is 2 / 3, and the length limiting slit is 10 mm. The powder X-ray diffraction spectrum is measured by a monochromator and a one-dimensional detector.

Embodiment 2

[0076] An adsorbent composed of cerium compound particles was obtained in the same manner as in Example 1 except that the heating temperature was 120°C. Next, the powder X-ray diffraction spectrum of the adsorbent was measured in the same manner as in Example 1.

Embodiment 3

[0078] An adsorbent composed of cerium compound particles was obtained in the same manner as in Example 1 except that the heating temperature was 160°C. Next, the powder X-ray diffraction spectrum of the adsorbent was measured in the same manner as in Example 1.

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Abstract

To provide an adsorbent that, compared to the conventional art, has improved fluorine adsorption capacity and breakthrough time, particularly an adsorbent that can be suitably used as a fluorine adsorbent. Provided is an adsorbent containing particles of a rare earth compound including a rare earth oxycarboxylate or a hydrate thereof.

Description

technical field [0001] The present invention relates to an adsorbent for adsorbing fluorine, a method for producing the same, and an adsorption molded article using the adsorbent. Background technique [0002] As a conventional method for removing, in particular, fluorine, among elements contained in aqueous solutions such as waste water, there is known a method for removing fluorine by precipitating and removing fluorine in the form of insoluble calcium fluoride with fluorine precipitation materials such as calcium hydroxide and calcium oxide, and Fluorine-containing waste water discharged from the chemical industry and the like is also treated using the above-mentioned fluorine-precipitating material. [0003] In recent years, the wastewater treatment standards for harmful substances and pollutants have become stricter due to social requirements. Although Japan’s fluorine wastewater standards are currently (as of October 2018) set below 8ppm, it may still be applicable in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/30C01F17/235C01F17/206C02F1/58
CPCB01J20/30B01J20/06C01F17/00B01J20/3078B01J20/3007B01J20/0207C02F1/281C02F2101/14C02F1/288B01J2220/4806
Inventor 梶田浩之木下和也伊东纯一黑崎敦
Owner MITSUI MINING & SMELTING CO LTD