JPS57139179A - Preparation of hard pitch - Google Patents
Preparation of hard pitchInfo
- Publication number
- JPS57139179A JPS57139179A JP2466481A JP2466481A JPS57139179A JP S57139179 A JPS57139179 A JP S57139179A JP 2466481 A JP2466481 A JP 2466481A JP 2466481 A JP2466481 A JP 2466481A JP S57139179 A JPS57139179 A JP S57139179A
- Authority
- JP
- Japan
- Prior art keywords
- pitch
- solvent
- meso phase
- insol
- soft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Working-Up Tar And Pitch (AREA)
- Inorganic Fibers (AREA)
Abstract
PURPOSE: To easily obtain a hard pitch suitable for impregnation, etc. by heating a soft or medium coal tar pitch to produce a meso phase and after removal of the meso phase, by solvent fractionation distilling off a low-molecular component in the pitch.
CONSTITUTION: A soft or medium coal tar pitch is heated to 350W500°C to produce a meso phase and after addition of a solvent such as tar oil, the solvent- insol. component contg. the meso phase is separated and removed by means of filtration, etc. Then the solvent is removed by subjecting the filtrate to vacuum distillation and a low-molecular component in the obtd. pitch is distilled off under vacuum by heating the pitch to about 350W500°C. Thus a hard pitch of softening temp. ≥200°C and quinoline-insol. content ≤2% is easily obtd. by a simple method.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2466481A JPS57139179A (en) | 1981-02-21 | 1981-02-21 | Preparation of hard pitch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2466481A JPS57139179A (en) | 1981-02-21 | 1981-02-21 | Preparation of hard pitch |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57139179A true JPS57139179A (en) | 1982-08-27 |
JPS6121589B2 JPS6121589B2 (en) | 1986-05-28 |
Family
ID=12144406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2466481A Granted JPS57139179A (en) | 1981-02-21 | 1981-02-21 | Preparation of hard pitch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57139179A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5941387A (en) * | 1982-08-30 | 1984-03-07 | Osaka Gas Co Ltd | Manufacture of quinoline-insoluble free-pitch |
JPS5982417A (en) * | 1982-11-04 | 1984-05-12 | Mitsubishi Oil Co Ltd | Pitch for raw material of carbon fiber and its preparation |
JPS6136392A (en) * | 1984-07-06 | 1986-02-21 | アライド・コーポレーシヨン | Low solid coal tar impregnating pitch |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0432141Y2 (en) * | 1985-02-20 | 1992-07-31 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5281321A (en) * | 1975-12-09 | 1977-07-07 | Koa Oil Co Ltd | Method of manufacturing binder pitch from petroleum heavy hydrocarbons |
JPS5410326A (en) * | 1977-06-24 | 1979-01-25 | Nittetsu Kagaku Kogyo Kk | Method of making binder pitch for carbon material |
JPS54160427A (en) * | 1977-07-08 | 1979-12-19 | Exxon Research Engineering Co | Production of optically anisotropic* deformable pitch* optical anisotropic pitch* and pitch fiber |
-
1981
- 1981-02-21 JP JP2466481A patent/JPS57139179A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5281321A (en) * | 1975-12-09 | 1977-07-07 | Koa Oil Co Ltd | Method of manufacturing binder pitch from petroleum heavy hydrocarbons |
JPS5410326A (en) * | 1977-06-24 | 1979-01-25 | Nittetsu Kagaku Kogyo Kk | Method of making binder pitch for carbon material |
JPS54160427A (en) * | 1977-07-08 | 1979-12-19 | Exxon Research Engineering Co | Production of optically anisotropic* deformable pitch* optical anisotropic pitch* and pitch fiber |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5941387A (en) * | 1982-08-30 | 1984-03-07 | Osaka Gas Co Ltd | Manufacture of quinoline-insoluble free-pitch |
JPH0150354B2 (en) * | 1982-08-30 | 1989-10-30 | Osaka Gas Co Ltd | |
JPS5982417A (en) * | 1982-11-04 | 1984-05-12 | Mitsubishi Oil Co Ltd | Pitch for raw material of carbon fiber and its preparation |
JPS6257678B2 (en) * | 1982-11-04 | 1987-12-02 | Mitsubishi Oil Co | |
JPS6136392A (en) * | 1984-07-06 | 1986-02-21 | アライド・コーポレーシヨン | Low solid coal tar impregnating pitch |
Also Published As
Publication number | Publication date |
---|---|
JPS6121589B2 (en) | 1986-05-28 |
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