发明名称 |
Verfahren zur Abtrennung von Polyethylenterephthalat von Polyvinylchlorid. |
摘要 |
<p>The process comprises: (1) treating the recycle stream with (a) at least one inorganic base and (b) at least one nonionic surfactant under conditions and for a time sufficient to decrease the contact angle of the polyethylene terephthalate flakes with water below a value of 25 DEG while maintaining the contact angle of the polyvinyl chloride flakes above a value of about 45 DEG ; (2) adding the treated recycle stream to water, to form an aqueous mixture containing the treated polyethylene terephthalate flakes and treated polyvinyl chloride flakes; (3) agitating the aqueous mixture to allow the polyvinyl chloride flakes to come in contact with gas bubbles; (4) allowing the polyvinyl chloride flakes to float and the polyethylene terephthalate flakes to sink; and (5) removing the polyvinyl chloride flakes from the surface of the aqueous mixture and removing the polyethylene terephthalate flakes from the bottom of the aqueous mixture.</p> |
申请公布号 |
DE69205485(D1) |
申请公布日期 |
1995.11.23 |
申请号 |
DE1992605485 |
申请日期 |
1992.05.04 |
申请人 |
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V., DEN HAAG/S'GRAVENHAGE, NL |
发明人 |
SISSON, EDWIN ANDREW, FAIRLAWN, OHIO 44333, US |
分类号 |
B03B1/04;B03B9/06;B03D1/02;B29B17/02;C08J11/06;(IPC1-7):C08J11/06 |
主分类号 |
B03B1/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|