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Revival method of spent s‑zorb adsorbent

An adsorbent, 1.s-zorb technology, applied in the separation method, filter regeneration, filtration separation, etc., can solve the problems of waste adsorbent regeneration, achieve efficient reuse, good adsorption and desulfurization performance, and reduce the "three wastes" treatment the effect of pressure

Inactive Publication Date: 2017-05-10
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method only separates the material that meets a certain particle size or only the magnetic nickel in it, and cannot really regenerate the spent adsorbent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The oxalic acid solution with a pH value of 0.5 and the S-Zorb waste adsorbent were mixed and stirred at room temperature for 2 hours according to the solid-to-liquid ratio of 8:1, and then the adsorbent was washed with deionized water, deionized water and S- The mass ratio of Zorb waste adsorbent is 10:1, measured on the dry basis of S-Zorb waste adsorbent; then filtered and dried at 100°C for 4 hours to obtain the initially regenerated adsorbent, and the initially regenerated adsorbent was heated at 450°C Roasting was carried out for 2.5 hours to obtain the revived adsorbent.

[0015] The S-Zorb waste adsorbent comes from the 0.9Mt / a S-Zorb unit of Sinopec Qilu Petrochemical Company.

Embodiment 2

[0017] The mixed solution of citric acid and oxalic acid with a pH value of 1 and the spent S-Zorb adsorbent were mixed and stirred at room temperature for 5 hours at a solid-to-liquid ratio of 5:1, and the mass ratio of citric acid and oxalic acid was 1:1; Ionized water was used to wash the adsorbent, and the mass ratio of deionized water to S-Zorb waste adsorbent was 7:1, and then filtered and dried at 120°C for 3 hours to obtain the initially regenerated adsorbent, and the initially regenerated adsorbent was placed in the Calcination was carried out at 500° C. for 1.5 hours to obtain the revived adsorbent.

Embodiment 3

[0019] The mixed solution of citric acid, tartaric acid and oxalic acid with a pH value of 0 and the S-Zorb waste adsorbent are mixed and stirred at room temperature for 4 hours according to the solid-liquid ratio of 6:1, and the mass ratio of citric acid, tartaric acid and oxalic acid is 1: 1:1; then the adsorbent was washed with deionized water, the mass ratio of deionized water and S-Zorb waste adsorbent was 9:1, and then filtered and dried at 80°C for 6 hours to obtain the initially regenerated adsorbent, which was The primary regenerated adsorbent is calcined at 600° C. for 0.5 hour to obtain the revived adsorbent.

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Abstract

The invention relates to a reactivating method for an S-Zorb waste sorbent and belongs to the treatment and application fields of solid wastes. The reactivating method for the S-Zorb waste sorbent comprises the following steps: mixing and stirring an organic acid solution and the S-Zorb waste sorbent to obtain a mixture; washing the mixture with deionized water, filtering, drying, and roasting for 0.5-4h at 350-600 DEG C so as to obtain the reactivated S-Zorb waste sorbent. According to the reactivating method for the S-Zorb waste sorbent, organic acid is adopted for treating the S-Zorb waste sorbent, and the waste sorbent is subjected to chemical treatment by adopting a chemical method, so that the construction and the chemical components of the waste sorbent can be changed thoroughly, and further the waste sorbent can be reactivated. The reactivating method is simple, the operation is flexible, the waste sorbent is reused with high efficiency, the treatment pressure on 'three wastes' in enterprises can be reduced, the specific surface area and the hole volume of the reactivated waste sorbent are greatly increased, and the adsorption desulfurization effect is good.

Description

technical field [0001] The invention relates to a resurrection method of S-Zorb waste adsorbent, which belongs to the field of solid waste treatment and application. Background technique [0002] With the increasingly stringent environmental protection regulations, my country's requirements for gasoline sulfur content are becoming more and more stringent. The National V standard requires gasoline sulfur content to be less than 10ppm, and the S-Zorb process is a gasoline deep desulfurization technology that can produce gasoline that meets the requirements. [0003] At present, most of the adsorbents in the S-Zorb process still rely on imports. Sinopec has developed an adsorbent that conforms to the Chinese production process and applied for a patent. The domestic transformation of the S-Zorb process has also made the process more and more suitable for China. raw material. But no matter how localized the process is, a large amount of waste adsorbent will be produced. For exa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/34
Inventor 刘欣梅刘龙妹郑阳阳陈英杰辛颖许本静阎子峰
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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