EP0099753A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A pitch from coal distillate feedstock
Assignee: EIDP Inc
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Filing: 1983-07-19
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Granted: —
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Expires: 2003-07-19
Abstract
Abstract A pitch suitable for spinning directly into carbon fibers, characterised by containing (i) from 80 to 100 percent by weight toluene insolubles, (ii) at least 15 percent by weight quinoline insolubles and/or from 1 to 60 percent by weight pyridine insolubles and (iii) is preferably substantially free of impurities and ash; said pitch having been derived from a substantially deasphaltenated fraction of a coat distillate.
Inventors
- 👤 Ghazi Dickakian
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 06:48
CPC Classifications
D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/145; D01F9/15; C; C10; C10C; C10C3/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
65 words
A pitch suitable for spinning directly into carbon fibers, characterised by containing (i) from 80 to 100 percent by weight toluene insolubles, (ii) at least 15 percent by weight quinoline insolubles and/or from 1 to 60 percent by weight pyridine insolubles and (iii) is preferably substantially free of impurities and ash; said pitch having been derived from a substantially deasphaltenated fraction of a coal distillate.
Claim 2
Dependent Claim
65 words
A pitch suitable for spinning directly into carbon fibers, characterised by containing (i) from 80 to 100 percent by weight toluene insolubles, (ii) at least 15 percent by weight quinoline insolubles and/or from 1 to 60 percent by weight pyridine insolubles and (iii) is preferably substantially free of impurities and ash; said pitch having been derived from a substantially deasphaltenated fraction of a coal distillate.
Claim 3
Dependent Claim
16 words
A pitch as claimed in claim 1, having from 15 to 50 weight percent quinoline insolubles.
Claim 4
Dependent Claim
66 words
A process for preparing a pitch suitable for carbon artifact manufacture characterised by: (a) distilling a feedstock.to obtain a substantially deasphaltenated middle fraction rich in 3, 4, 5 and 6 polycondensed aromatic rings; (b) heat soaking said middle fraction; and (c) vacuum stripping said heat soaked middle fraction to remove oils therefrom, resulting in a pitch comprising 80 to 100 percent by weight of toluene insolubles.
Claim 5
Dependent Claim
66 words
A process for preparing a pitch suitable for carbon artifact manufacture characterised by: (a) distilling a feedstock.to obtain a substantially deasphaltenated middle fraction rich in 3, 4, 5 and 6 polycondensed aromatic rings; (b) heat soaking said middle fraction; and (c) vacuum stripping said heat soaked middle fraction to remove oils therefrom, resulting in a pitch comprising 80 to 100 percent by weight of toluene insolubles.
Claim 6
Dependent Claim
50 words
A pitch for spinning directly into carbon fibers that has been derived from a substantially deasphaltenated fraction of a coal distillate and having the proper rheological properties for direct spinning into carbon fibers characterised by a glass transition temperature in the approximate range of 180°C to 250°C at atmospheric pressure.
Claim 7
Dependent Claim
50 words
A pitch for spinning directly into carbon fibers that has been derived from a substantially deasphaltenated fraction of a coal distillate and having the proper rheological properties for direct spinning into carbon fibers characterised by a glass transition temperature in the approximate range of 180°C to 250°C at atmospheric pressure.
Claim 8
Dependent Claim
30 words
A pitch as claimed in claim 5, wherein said pitch is derived from a middle fraction of a coal distillate rich in 3, 4, 5 and 6 polycondensed aromatic rings.
Claim 9
Dependent Claim
69 words
A pitch for spinning directly into carbon fibers that has been derived from a substantially deasphaltenated fraction of a feedstock and having the proper rheological properties for direct spinning into carbon fibers characterised by a glass transition temperature in the approximate range of 180°C to 250°C, and a viscosity of less than approximately 10,000 cps in a temperature range of approximately 300 C , to 400°C, at atmospheric pressure.
Claim 10
Dependent Claim
69 words
A pitch for spinning directly into carbon fibers that has been derived from a substantially deasphaltenated fraction of a feedstock and having the proper rheological properties for direct spinning into carbon fibers characterised by a glass transition temperature in the approximate range of 180°C to 250°C, and a viscosity of less than approximately 10,000 cps in a temperature range of approximately 300 C , to 400°C, at atmospheric pressure.
Claim 11
Dependent Claim
30 words
A pitch as claimed in claim 6, wherein said pitch is derived from a middle fraction of a coal distillate rich in 3, 4, 5 and 6 polycondensed aromatic rings.
Claim 12
Dependent Claim
19 words
A pitch as claimed in claim 7, wherein said pitch comprises from 80 to 100 weight percent toluene insolubles.
Claim 13
Dependent Claim
30 words
A process for spinning pitch directly into carbon fibers, comprising the steps of preparing a pitch as claimed in any preceding claim and thereafter spinning the pitch directly into fibers.
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