The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 2001
Filed:
Jan. 29, 1999
Masanori Tabata, Tokyo, JP;
Naohiko Ukawa, Hiroshima, JP;
Masato Kaneko, Hiroshima, JP;
Kazuto Kobayashi, Hiroshima, JP;
Shigeo Hasegawa, Hiroshima, JP;
Wataru Matsubara, Hiroshima, JP;
Kenji Iwasaki, Hiroshima, JP;
Yoshihisa Saito, Sendai, JP;
Takehiko Moriya, Sendai, JP;
Other;
Abstract
This invention relates to equipment for treating the aforesaid waste plastics directly with supercritical water, and an object thereof is to provide a method for the anticorrosive treatment of waste plastics treating equipment which makes it possible to use inexpensive stainless steel. Waste plastics treating equipment made of stainless steel is charged with a predetermined amount of an aqueous solution containing at least one alkali metal salt, and this aqueous solution is deaerated until its dissolved oxygen content is reduced to 0.5 mg/L or less. After the temperature and pressure of the equipment are raised until supercritical conditions are established, these temperature and pressure are maintained for a predetermined period of time.