Method for recycling waste plastic material containing styrene p

Details Method for recycling waste plastic material containing styrene p Method for recycling waste plastic material containing styrene p

1996-07-02

1998-10-20

Cooney, Jr., John M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Process of treating scrap or waste product containing solid...

521 41, 521 46, C08J 1104

Patent

active

058247092

ABSTRACT:
A waste plastic containing a polymer such as polystyrene polypropylene or ABS resin is dissolved in a solvent to form a solution of the waste plastic at an elevated temperature. The solution is filtered to remove labels or other adhered foreign debris. The filtrate is heated to a temperature of 200.degree.-300.degree. C. under a pressure of 1-75 torrs to remove the solvent by evaporation, and the resulting plastic melt is extruded into pellet whereby the waste plastic is recovered. On the other hand, the solvent separated by the vacuum-evaporation is condensed by a water-, brine- and/or refrigerant-cooled condensers, refined by a vacuum-evaporated and recycled to use it as a solvent for the incoming subsequent waste plastic. The pelleted styrene recycle product is free of debris such as labels and accordingly has a good color. Moreover, this recycle product has a good transparency when the waste plastic is transparent.

REFERENCES:
patent: 4196105 (1980-04-01), Kubat et al.
patent: 5147894 (1992-09-01), Bopp et al.
CA 109:39,006; Dec. 1987.
JP 06,316,646; Nov. 15, 1994; World Patent Index Ascession No. 95-032853.

Affiliated with

Also associated with

Rating

Method for recycling waste plastic material containing styrene p 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 recycling waste plastic material containing styrene p, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for recycling waste plastic material containing styrene p will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-244932