Alkaline pretreatment revival method of spent s‑zorb adsorbent

An alkali pretreatment and adsorbent technology, which is applied in separation methods, filter regeneration, filtration separation, etc., can solve the problems of waste adsorbent regeneration, etc., and achieve the effects of increased specific surface area and pore volume, short process flow and flexible operation

Inactive Publication Date: 2017-08-08
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

[0015] The NaOH solution with a pH value of 13 and the S-Zorb waste adsorbent were mixed and stirred at room temperature for 1.5 hours at a solid-to-liquid ratio of 5:1, and then the adsorbent was washed with deionized water, deionized water and S-Zorb The mass ratio of the waste adsorbent is 7:1, calculated on a dry basis; the adsorbent after alkali washing is obtained after filtration. The oxalic acid solution with a pH value of 0.5 and the adsorbent after alkaline washing were mixed and stirred at 50°C for 2 hours at a solid-to-liquid ratio of 3:1, and then the adsorbent was washed with deionized water, deionized water and S -The mass ratio of the Zorb waste adsorbent is 6:1, and then filtered and dried at 100°C for 4 hours to obtain the initially regenerated adsorbent, and the initially regenerated adsorbent is roasted at 450°C for 2.5 hours to obtain the revived adsorbent .

[0016] The S-Zorb waste adsorbent comes from the 0.9Mt / a S-Zorb unit of Sinopec Qilu Petrochemic...

Embodiment 2

[0018] K at pH 11.5 2 CO 3 The solution and the S-Zorb waste adsorbent were mixed and stirred at 45°C for 0.5 hours at a solid-to-liquid ratio of 4:1, and then the adsorbent was washed with deionized water. The mass ratio of deionized water to S-Zorb waste adsorbent was The ratio is 6:1, and the adsorbent after alkali washing is obtained after filtration. The mixed solution of citric acid and oxalic acid with a pH value of 1 and the S-Zorb waste adsorbent were mixed and stirred at 70°C for 5 hours at a solid-to-liquid ratio of 6:1, and the mass ratio of citric acid and oxalic acid was 1:1, and then Wash the adsorbent with deionized water, the mass ratio of deionized water and S-Zorb waste adsorbent is 7:1, and then filter and dry at 120°C for 3 hours to obtain the initially regenerated adsorbent, and the adsorbent after the initial regeneration The agent was calcined at 500°C for 1.5 hours to obtain the revived adsorbent.

Embodiment 3

[0020] NaOH and NaOH with a pH value of 10.5 2 CO 3 The mixed solution and the spent S-Zorb adsorbent were mixed and stirred at 70°C for 4.5 hours at a solid-to-liquid ratio of 7:1. NaOH and NaOH 2 CO 3 The mass ratio is 1:1, and then the adsorbent is washed with deionized water, the mass ratio of deionized water and S-Zorb waste adsorbent is 9:1, and the adsorbent after alkali washing is obtained after filtration. 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-to-liquid ratio of 5:1, and the mass ratio of citric acid, tartaric acid and oxalic acid is 1: 1:1, and 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. The primary regenerated adsorbent is calcined at 600° ...

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PUM

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Abstract

The invention relates to an alkali pretreatment reactivation method for an S-Zorb spent sorbent, and belongs to the field of solid waste treatment and application. The method comprises the following steps: mixing the S-Zorb spent sorbent with aqueous alkali, stirring, washing with deionized water, and filtering to obtain alkali treated sorbent; mixing the alkali treated sorbent with an organic acid solution, stirring, washing with deionized water, filtering, and carrying out drying and roasting. The alkali pretreatment reactivation method has the advantages that as the aqueous alkali and the organic acid solution are adopted for treatment in sequence, the reactivation method is simple; the technological process is short; the operation is flexible. The S-Zorb spent sorbent reactivated according to the method is greatly higher in specific surface area and pore volume, and high in adsorption desulfurization property.

Description

technical field [0001] The invention relates to an alkali pretreatment revival method for S-Zorb waste adsorbent, belonging 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] A large amount of waste adsorbents are produced accordingly. If the waste adsorbents are all treated as waste, the active components such as effective nickel and zinc contained in them will be lost relatively large, and the landfill of the waste will occupy a large amount of land resources, and it will If it enters the water with the natural circulation, it will pollute the soil and water resources, br...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/34
Inventor 刘欣梅辛颖刘龙妹许本静郑阳阳陈英杰阎子峰
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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