Invention Grant
US08362304B2 Process for making glycol ether compositions useful for metal recovery
有权
制备用于金属回收的二醇醚组合物的方法
- Patent Title: Process for making glycol ether compositions useful for metal recovery
- Patent Title (中): 制备用于金属回收的二醇醚组合物的方法
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Application No.: US12460225Application Date: 2009-07-15
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Publication No.: US08362304B2Publication Date: 2013-01-29
- Inventor: Farhad Fadakar , Adam Chan
- Applicant: Farhad Fadakar , Adam Chan
- Applicant Address: US TX Houston
- Assignee: Lyondell Chemical Technology, L.P.
- Current Assignee: Lyondell Chemical Technology, L.P.
- Current Assignee Address: US TX Houston
- Main IPC: C07C41/03
- IPC: C07C41/03 ; C07C43/13 ; C22B15/00 ; C22B11/10 ; B03D1/008

Abstract:
Glycol ether compositions useful for metal recovery by froth flotation and processes for making the compositions are disclosed. In one process, dipropylene glycol methyl ether (DPM) is propoxylated to give a composition comprising 4 to 15 wt. % of DPM and at least 20 wt. % of tripropylene glycol methyl ether (TPM). In another process, the glycol ether composition is made from a distillation residue which comprises DPM, TPM, and a basic catalyst. Extraction of the residue with water to remove some of the basic catalyst is followed by propoxylated to give a composition which comprises less than 15 wt. % of DPM, at least 20 wt. % of TPM, and one or more PO-based glycols. In comparative froth tests, glycol ether compositions of the invention meet or exceed the performance of commercial frothers.
Public/Granted literature
- US20110011210A1 Process for making glycol ether compositions useful for metal recovery Public/Granted day:2011-01-20
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