Granted Patent
B2
US 9,683,077 · App. 14/669,882 · Granted Jun 20, 2017
Copolymerization of propylene oxide and carbon dioxide without production of propylene carbonate
Inventors:
Geoffrey W. Coates (Ithaca, NY); Stephen Lee (Ithaca, NY); Zengquan Qin (Copley, OH); Nicholas J. Robertson (Ithaca, NY)
Assignee:
Cornell Research Foundation, Inc.
View Patent ↗
Loading inventors, assignments & file history…
Abstract
Copolymers of propylene oxide and carbon dioxide and homopolymers of propylene oxide are made using two dimensional double metal cyanide complexes having the formula Co[M(CN) 4 ] or hydrated or partially dehydrated form thereof. There is no propylene carbonate by product in the copolymerization.
Claims (7)
1. A method of preparing a double metal catalyst of formula Co[M(CN) 4 ] comprising:
a. reacting Co(SO 4 ) with K 2 [M(CN) 4 ] to form a hydrated Co[M(CN) 4 ]; and
b. dehydrating the hydrated Co[M(CN) 4 ] to produce the double metal catalyst of formula Co[M(CN) 4 ];
wherein M is selected from Ni, Pt, and Pd.
2. The method of claim 1 , wherein M is Ni.
3. The method of claim 1 , wherein M is Pt.
4. The method of claim 1 , wherein M is Pd.
Assignments (2)
CONFIRMATORY LICENSE
Recorded Nov 20, 2015
From: CORNELL UNIVERSITY
To: NATIONAL SCIENCE FOUNDATION
Reel/Frame 037151/0114 →
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Jul 14, 2015
From: COATES, GEOFFREY W.; LEE, STEPHEN; QIN, ZENGQUAN; ROBERTSON, NICHOLAS J.
To: CORNELL RESEARCH FOUNDATION, INC.
Reel/Frame 036076/0544 →
Continuity (5)
Provisional Application
60839682
· Aug 24, 2006