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Oxidation treatment method for carrier carbon surface

An oxidation treatment, carrier carbon technology, applied in chemical instruments and methods, catalyst carriers, chemical/physical processes, etc., can solve the problem of small specific surface area methylene blue adsorption value, low dispersion of precious metal active components, and oxygen-containing functional groups ash. The problem of high content, to achieve the effect of improving performance, short processing time, increasing alkalinity and specific surface area

Inactive Publication Date: 2008-09-24
CHENZHOU GAOXIN PLATINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carrier carbon obtained by traditional methods has small specific surface area and methylene blue adsorption value, low dispersion of noble metal active components, high oxygen-containing functional groups and high ash content, and the highest adsorption rate of noble metal active components can only reach 95%.

Method used

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Comparison scheme
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specific Embodiment approach 2

[0030] A method for oxidation treatment of a carrier carbon surface, comprising the following steps

[0031] (1) acid treatment

[0032] The powdered activated carbon and the nitric acid solution with a weight concentration of 2-12% are mixed in a ratio of 1:7 by weight, and treated at a temperature of 30-50° C. for 1-2 hours,

[0033] (2) Filtration and washing

[0034] Filter the powdered activated carbon suspension treated in step (1), wash the filter residue with water until the pH value of the washing water is 6.5-7,

[0035] (3) Ultrasonic radiation treatment

[0036] The powdered activated carbon and water prepared in step (2) are formulated into a suspension in a weight ratio of 1:7, and the suspension is subjected to ultrasonic radiation treatment for 20-120min at a temperature of 30-60°C, wherein the ultrasonic Energy control at 1-10W / cm 2 between,

[0037] (4) Microwave treatment

[0038] After the powdered activated carbon obtained by filtering the obtained s...

specific Embodiment approach 3

[0039] A method for oxidation treatment of a carrier carbon surface, comprising the following steps

[0040] (1) acid treatment

[0041] The powdered activated carbon and the nitric acid solution with a weight concentration of 2-12% are mixed in a ratio of 1:10 by weight, and treated at a temperature of 30-50° C. for 1-2 hours,

[0042] (2) Filtration and washing

[0043] Filter the powdered activated carbon suspension treated in step (1), wash the filter residue with water until the pH value of the washing water is 6.5-7,

[0044] (3) Ultrasonic radiation treatment

[0045] The powdered activated carbon and water prepared in step (2) are formulated into a suspension in a weight ratio of 1:4, and the suspension is subjected to ultrasonic radiation treatment for 20-120min at a temperature of 30-60°C, wherein the ultrasonic Energy control at 1-10W / cm 2 between,

[0046] (4) Microwave treatment

[0047] After the powdered activated carbon obtained by filtering the obtained ...

specific Embodiment approach 4

[0048] A method for oxidation treatment of a carrier carbon surface, comprising the following steps

[0049] (1) acid treatment

[0050] Mix powdered activated carbon and nitric acid solution with a weight concentration of 2-12% in a ratio of 1:6 by weight, and treat at a temperature of 30-50°C for 1-2 hours,

[0051] (2) Filtration and washing

[0052] Filter the powdered activated carbon suspension treated in step (1), wash the filter residue with water until the pH value of the washing water is 6.5-7,

[0053] (3) Ultrasonic radiation treatment

[0054] The powdered activated carbon and water prepared in step (2) are formulated into a suspension in a weight ratio of 1:10, and the suspension is subjected to ultrasonic radiation treatment for 20-120min at a temperature of 30-60°C, wherein the ultrasonic Energy control at 1-10W / cm 2 between,

[0055] (4) Microwave treatment

[0056] After the powdered activated carbon obtained by filtering the obtained suspension in step...

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Abstract

The invention relates to a method of oxidation process on the surface of a carrier carbon, including the following steps that: powdered activated carbon is mixed with nitric acid solution with a concentration ranging from 2 to 12 percent by the weight ratio of 1:3 to 30 to make a powdered activated carbon suspension which is processed by ultrasonic radiation for 20-120min at the temperature between 30 DEG C and 60 DEG C, wherein, the ultrasonic energy is controlled between 1 and 10W / cm<2>. The suspension is filtered and the residue is cleaned by water until the pH value of the washing water ranges from 6.5 to 7. After drying, under the protection of nitrogen, the residue is processed at the high temperature between 800 DEG C and 1100 DEG C for 5 to 15min by microwave with the frequency of 2450 MHz and the power ranging from 200W to 850W. The method provided by the invention can remove most oxygen-functional groups on the surface of the activated carbon, improve the alkalinity and the specific surface area on the surface of the activated carbon and reduce the ash content of the activated carbon. Besides, the method provided by the invention has the advantages of short processing time, high processing efficiency, environmental protection and energy conservation.

Description

Technical field [0001] The invention relates to an oxidation treatment method for the surface of catalyst carrier carbon. technical background [0002] When activated carbon is used as a catalyst carrier, it is called catalyst carrier carbon. Because there may be sodium Na, potassium K, silicon Si, aluminum Al, zinc Zn, phosphorus P, nitrogen N, iron Fe, sulfur S, oxygen O, Calcium Ca and other elements, the existence of these elements will affect the hardness and service life of the catalyst carrier, and may accelerate side reactions, thus adversely affecting the performance of the catalyst. Therefore, when activated carbon is used as a catalyst carrier, in addition to choosing to balance the proportion of macropores, mesopores and micropores to optimize the performance of the catalyst, it is also necessary to modify the surface of the activated carbon to achieve the ideal surface functional groups for loading precious metals and developed. hole structure. [0003] In the...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J21/18B01J37/34
Inventor 雷涤尘杨静
Owner CHENZHOU GAOXIN PLATINUM
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