Reacción #350552

Ecuación de reacción

pyridine

→

Naphthalene

Condiciones de reacción

Tratamiento posterior

1. 1
   Otroa Mettler softening point of 250° C.
2. 2
   Otrowas conducted at 100° C.
3. 3
   Filtraciónfollowed by filtration with a 0.5 μm membrane
4. 4
   Filtraciónfilter
5. 5
   Otroto remove a pyridien-insoluble matter
6. 6
   OtroThen, from the soluble matter, pyridine was removed
7. 7
   Otroto obtain a pyrildine-soluble pitch
8. 8
   OtroΔTg of 33° C. and Qi of not more than 1% by weight

Procedimiento

Naphthalene was polymerized at a temperature of from 200° to 400° C. in the presence of a HF.BF3 catalyst to obtain a pitch which had an optical anisotropy of 100% as observed under a polarization microscope, an optical anisotropic structure of a "rough flow type", a Mettler softening point of 250° C. and an elemental composition as analyzed of C: 94.8 wt % and H: 5.2 wt %. This pitch was finely pulverized. Then, pyridine (solubility parameter: 10.6) was added in an amount of 200 ml to 5 g of this pitch, and extraction was conducted at 100° C., followed by filtration with a 0.5 μm membrane filter to remove a pyridien-insoluble matter. Then, from the soluble matter, pyridine was removed to obtain a pyrildine-soluble pitch. The pitch had ΔTg of 33° C. and Qi of not more than 1% by weight.

Fuente