CN104591141A - Method for preparing low-sulfur high-multiple expanded graphite - Google Patents
Method for preparing low-sulfur high-multiple expanded graphite Download PDFInfo
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- CN104591141A CN104591141A CN201310522216.XA CN201310522216A CN104591141A CN 104591141 A CN104591141 A CN 104591141A CN 201310522216 A CN201310522216 A CN 201310522216A CN 104591141 A CN104591141 A CN 104591141A
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- expanded graphite
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- sulfuric acid
- sulfur
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Abstract
A disclosed method for preparing low-sulfur high-multiple expanded graphite comprises: fully mixing sulfuric acid, a nitric acid solution and acetic anhydride, wherein the concentration of sulfuric acid is 98%, the concentration of the nitric acid solution is 62%, the concentration of acetic anhydride is 96%, and the weight ratio of sulfuric acid, the nitric acid solution and acetic anhydride is (1.2-1.6):1:1; adding natural flake graphite with the carbon content of 99% and the granularity of 60 mesh into the mixed solution, reacting at 25-28 DEG C for 35 min, washing with water to be neutral, dewatering and airing, and then expanding under the temperature condition of 1000 DEG C, so as to obtain the low-sulfur high-multiple expanded graphite. The content of sulfuric acid, the nitric acid solution and acetic anhydride is reasonable, when high-temperature expansion is performed, organics are discomposed and gasified, no harmful substances are left, removal of sulfur is facilitated, and the prepared graphite is low in sulfur content and high in expansion multiple.
Description
Technical field
The invention belongs to graphite technology field, be specifically related to a kind of method preparing low-sulfur highly expanded graphite.
Background technology
Expanded graphite is described as s-generation sealing material, and because of its tramp element, the especially impact of element sulphur, often accelerates galvanic corrosion and the crevice corrosion of metal, makes sealing effectiveness be subject to great infringement, finally causes seal failure, even cause security incident.
Summary of the invention
In order to overcome the above-mentioned technical problem that prior art field exists, the object of the invention is to, provide a kind of method preparing low-sulfur highly expanded graphite, technique is simple, considerably reduces the content of sulphur.
The method preparing low-sulfur highly expanded graphite provided by the invention, comprise the following steps: sulfuric acid, salpeter solution and diacetyl oxide mix by (1) completely, the concentration of described sulfuric acid is 98%, the concentration of salpeter solution is 62%, diacetyl oxide concentration is 96%, and the weight ratio of three is (1.2-1.6): 1:1; (2) be 99% by carbon content, granularity puts into mixed solution described in step (1) for 60 object natural flake graphites, 35min is reacted under the temperature condition of 25-28 DEG C, be washed to neutrality, dehydration is afterwards dried, expand under the temperature condition of 1000 DEG C again, low-sulfur highly expanded graphite can be obtained.
The method preparing low-sulfur highly expanded graphite provided by the invention, its beneficial effect is, the content of reasonable preparation sulfuric acid, salpeter solution and diacetyl oxide three, when high temperature puffing, organic substance decomposing gasifies, the residual of nuisance can not be caused, contribute to the removal of sulphur, make the graphite sulphur content that obtains low, expansion multiple is high, and technique is simple, the reaction times is short, easy to operate.
Embodiment
Below in conjunction with an embodiment, the method preparing low-sulfur highly expanded graphite provided by the invention is described in detail.
Embodiment
The method preparing low-sulfur highly expanded graphite of the present embodiment, comprise the following steps: sulfuric acid, salpeter solution and diacetyl oxide mix by (1) completely, the concentration of described sulfuric acid is 98%, and the concentration of salpeter solution is 62%, diacetyl oxide concentration is 96%, and the weight ratio of three is 1.2:1:1; (2) be 99% by carbon content, granularity puts into mixed solution described in step (1) for 60 object natural flake graphites, under the temperature condition of 25 DEG C, react 35min, be washed to neutrality, dehydration is afterwards dried, expand under the temperature condition of 1000 DEG C again, low-sulfur highly expanded graphite can be obtained.
Claims (1)
1. prepare the method for low-sulfur highly expanded graphite for one kind, it is characterized in that: comprise the following steps: sulfuric acid, salpeter solution and diacetyl oxide mix by (1) completely, the concentration of described sulfuric acid is 98%, the concentration of salpeter solution is 62%, diacetyl oxide concentration is 96%, and the weight ratio of three is (1.2-1.6): 1:1; (2) be 99% by carbon content, granularity puts into mixed solution described in step (1) for 60 object natural flake graphites, 35min is reacted under the temperature condition of 25-28 DEG C, be washed to neutrality, dehydration is afterwards dried, expand under the temperature condition of 1000 DEG C again, low-sulfur highly expanded graphite can be obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310522216.XA CN104591141A (en) | 2013-10-30 | 2013-10-30 | Method for preparing low-sulfur high-multiple expanded graphite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310522216.XA CN104591141A (en) | 2013-10-30 | 2013-10-30 | Method for preparing low-sulfur high-multiple expanded graphite |
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| Publication Number | Publication Date |
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| CN104591141A true CN104591141A (en) | 2015-05-06 |
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| CN201310522216.XA Pending CN104591141A (en) | 2013-10-30 | 2013-10-30 | Method for preparing low-sulfur high-multiple expanded graphite |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108069419A (en) * | 2017-12-21 | 2018-05-25 | 浙江山峪科技股份有限公司 | A kind of macroscopic view graphene aerogel and preparation method thereof |
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2013
- 2013-10-30 CN CN201310522216.XA patent/CN104591141A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108069419A (en) * | 2017-12-21 | 2018-05-25 | 浙江山峪科技股份有限公司 | A kind of macroscopic view graphene aerogel and preparation method thereof |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150506 |