Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...
Patent
1999-08-23
2000-04-11
Acquah, Samuel A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Process of treating scrap or waste product containing solid...
526 64, 526 65, 526 66, 526 71, 528272, 525437, C08J 1104, C08G 8500
Patent
active
060489073
ABSTRACT:
An apparatus for converting PET into polyester polyols including a reactor vessel having an interior volume, a stirring member rotatably mounted inside the reactor vessel and adapted to stir contents of the reactor vessel, a rotation device connected to the stirring member and adapted to rotate the stirring member in the reactor vessel, and a heater interactive with the interior of the reactor vessel so as to elevate the temperature of the interior volume of the reactor vessel to at least 175.degree. C. The reactor vessel has an inner wall and an outer wall with a space therebetween. The heater passes a heated fluid into the space between the inner wall and the outer wall. The stirring member includes a tubular member extending through the interior volume of the reactor vessel and a plurality of stirring arms extending radially outwardly of the tubular member. The heater serves to pass heated fluid through the interior of the tubular member and into the interior passageway of the stirring arms.
REFERENCES:
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patent: 4602046 (1986-07-01), Buser et al.
patent: 5395858 (1995-03-01), Schwartz, Jr.
patent: 5580905 (1996-12-01), Schwartz, Jr.
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