Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1985-02-08
1986-11-25
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
5253338, C08F 850
Patent
active
046249931
ABSTRACT:
A method for depolymerizing a non-thermosetting polymer is described. The method comprises the steps of heating the polymer until it is molten and then reacting the molten polymer with oxygen in the absence of a catalyst at a temperature between about 270.degree. F. and about 415.degree. F. by sparging the molten material at a flow rate of at least 2 cubic feet per minute per 1000 pounds of polymer with oxygen-containing gas bubbles having a diameter of less than about 10.0 mm. Advantages of the invention include reduced reaction temperatures, reduced reaction times, elimination of the need for a catalyst, and improved end-products. Treatment of amorphous polypropylene and mixtures of alpha-olefins and Fischer-Tropsch waxes are preferred applications of the invention.
REFERENCES:
patent: 2828296 (1953-03-01), Guillet
patent: 2911384 (1959-11-01), Thompson et al.
patent: 2928797 (1960-03-01), Brunson et al.
patent: 3110708 (1963-11-01), Wisseroth et al.
patent: 3130186 (1964-04-01), Siggel et al.
patent: 3160621 (1964-12-01), Hagemeyer, Jr. et al.
patent: 3177193 (1965-04-01), Scott, Jr.
patent: 3201381 (1965-08-01), Hagemeyer, Jr. et al.
patent: 3227703 (1966-01-01), Copenhaver, Jr. et al.
patent: 3232917 (1966-02-01), McCall et al.
patent: 3383375 (1968-05-01), van der Vegt et al.
patent: 3519588 (1970-07-01), Hagemeyer, Jr. et al.
patent: 3563972 (1971-02-01), Kowalski
patent: 3655834 (1972-04-01), Wisseroth et al.
patent: 3700639 (1972-10-01), Hulse et al.
patent: 3898209 (1975-08-01), Watson et al.
patent: 4145493 (1979-03-01), Petrille et al.
patent: 4145526 (1979-03-01), Vanlautem et al.
Asinger, F., Paraffins, Chemistry and Technology, 1968, pp. 583-604.
C.A. 20572m "Erosion and Depolymerization of Polymers by Hot Air or Plasma Jets", Dushin et al., Inzh-Fiz.Zh, 1968, 15(3), pp. 444-449.
C.A 32269x "Behavior of Polymer Materials in a Plasma Jet", Yurevich, Teplo., 1969, pp. 145-154.
Klee Maurice M.
Lipman Bernard
Moore and Munger, Inc.
Schofer Joseph L.
LandOfFree
Method for depolymerizing polymers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for depolymerizing polymers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for depolymerizing polymers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1158939