Apparatus for making pitch fiber infusible

Details Apparatus for making pitch fiber infusible Apparatus for making pitch fiber infusible

1980-01-02

1981-08-11

Garris, Bradley

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including heat exchanger for reaction chamber or reactants...

34240, 422233, 425445, 432128, 432145, 432152, 432253, B01J 600, C10C 314, F27B 502, F27B 506

Patent

active

042833698

ABSTRACT:
A method of producing carbon fiber by making infusible and carbonizing pitch fiber which is obtained by melt-spinning petroleum-tar pitch or coal-tar pitch, and a method of making pitch fiber infusible in an air atmosphere containing NO.sub.2, at an elevated temperature by introducing a cross-sectionally U-shaped tray with pitch fiber suspended from bars placed across an upper portion thereof into an infusible material producing furnace having gas exchanging chambers in the inlet portion and outlet portion thereof as well as at least two gas circulating means each of which comprises a combination of a blower or a fan and a heat exchanger, and retaining said tray in said furnace.

REFERENCES:
patent: 1949716 (1934-03-01), Harsch
patent: 2667707 (1954-02-01), Kropf
patent: 2788542 (1957-04-01), Swalm, Jr. et al.
patent: 2842349 (1958-07-01), Ipsen
patent: 3698698 (1972-10-01), Kreider et al.
patent: 4016247 (1977-04-01), Otani et al.
W. Watt et al., "The Effect of Length Changes Diving the Oxidation of Polyacrylonitrile Fibers on the Young's Modulus of Carbon Fibers", Applied Polymer Symposia, No. 9, pp. 215-227 (1969).

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