EP0223574A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method for the preparation of porous carbon structures
Assignee: Unilever PLC
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Filing: 1986-11-14
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Granted: —
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Expires: 2006-11-14
Abstract
Abstract This invention relates to the production of a novel, porous, carbon structure. A stabilised porous polymer comprising cavities joined by interconnecting pores is heated in an inert atmosphere to yield a stable, porous, carbon structure having the inherent structure of the original stabilised polymer.
Inventors
- 👤 Christopher John Carruthers Edwards
- 👤 David Andrew Hitchen
- 👤 Martin Sharples
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 22:46
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/524; C04B38/00; C04B38/0022
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
30 words
A porous carboniferous structure consisting of concave surfaces and having at least 80% voids and comprising cavities joined by interconnecting pores and having a density of less than 0.5 g/cm³.
Claim 2
Dependent Claim
30 words
A porous carboniferous structure consisting of concave surfaces and having at least 80% voids and comprising cavities joined by interconnecting pores and having a density of less than 0.5 g/cm³.
Claim 3
Dependent Claim
22 words
A porous carboniferous structure as claimed in claim l having at least 90% voids and a density of less than 0.25 g/cm³.
Claim 4
Dependent Claim
28 words
A process for the manufacture of a porous carbon structure comprising heating a stabilised, cross-linked, porous polymer in an inert atmosphere to a temperature of at least 500°C.
Claim 5
Dependent Claim
28 words
A process for the manufacture of a porous carbon structure comprising heating a stabilised, cross-linked, porous polymer in an inert atmosphere to a temperature of at least 500°C.
Claim 6
Dependent Claim
16 words
A process as claimed in claim 3 in which the porous polymer is a sulphonated polystyrene.
Claim 7
Dependent Claim
25 words
A process as claimed in claim 4 in which at least 20% of the polymer is cross-linked and 50% of the cross-linked polymer is sulphonated.
Claim 8
Dependent Claim
16 words
A process as claimed in claim 3 in which the cross-linked polymer is an alkyl acrylonitrile.
Claim 9
Dependent Claim
15 words
A process as claimed in claim 3 in which the cross-linked polymer is a polychlorostyrene.
Claim 10
Dependent Claim
17 words
A process as claimed in claim 7 in which the degree of cross-linking is greater than 20%.
Claim 11
Dependent Claim
40 words
A process as claimed in claim 3 in which the porous polymer is a flexible polymer and is modified by the incorporation of a resin to coat the interior surfaces of the polymer, prior to heating to carbonise the polymer.
References Cited (Backward Citations)
No citation records indexed.
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