Title:
TREATMENT OF PLASTIC MIXED WASTE
Document Type and Number:
Japanese Patent JP3273316
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To recover and reutilize highly pure hydrocarbons without substantial need for pretreatment of the waste and without discharging environment-poluting substances by treating a crushed product of a plastic mixed waste, in which chlorinated resins are mixed, with a specifically concentrated aqueous sodium hydroxide solution.
SOLUTION: A crushed plastic mixed waste, in which chlorinated resins are mixed, and an aqueous sodium hydroxide solution having a concentration of 30-50 wt.% are accommodated in a reaction vessel in the state of the plastic mixed waste being immersed in the aqueous sodium hydroxide solution, and heated to 250-310°C to react the plastic mixed waste with the aqueous sodium hydroxide solution so that the waste is at least dechlorinated. The crushed plastic mixed waste preferably has a maximum length of 5-15 mm. The ratio of the plastic mixed waste to the aqueous sodium hydroxide solution is preferably 1-8 wt.%. The retention time in the reaction vessel is approximately 0.5-5 hrs.
Inventors:
Akitsugu Okuwaki
Toshiaki Yoshioka
Declaration
Miho Uchida
Toshiaki Yoshioka
Declaration
Miho Uchida
Application Number:
JP4127299A
Publication Date:
April 08, 2002
Filing Date:
February 19, 1999
Export Citation:
Assignee:
Tohoku University
International Classes:
C08J11/16; B09B3/00; (IPC1-7): C08J11/16; B09B3/00
Domestic Patent References:
| JP8259728A | ||||
| JP4896503A |
Attorney, Agent or Firm:
Takehiko Suzue (5 outside)
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