Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Inorganic carbon containing
Reexamination Certificate
2005-03-15
2005-03-15
Wood, Elizabeth D. (Department: 1755)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Inorganic carbon containing
C502S152000, C502S153000, C502S154000, C502S155000, C502S156000, C502S157000, C502S159000, C502S169000, C502S172000, C502S200000
Reexamination Certificate
active
06867162
ABSTRACT:
The present invention is directed to double metal cyanide catalysts (“DMC”) which are prepared by combining i) at least one metal salt; ii) at least one metal cyanide salt; iii) at least one organic complexing ligand; iv) at least one alkali metal salt; and, optionally, v) at least one functionalized polymer under conditions sufficient to form a catalyst; and adding a sufficient amount of the at least one alkali metal salt to the catalyst so formed in an amount such that the catalyst includes the at least one alkali metal salt in an amount of from about 0.4 to about 6 wt. % based on the total weight of the catalyst. The polyols produced in the presence of the catalysts of the present invention have reduced levels of high molecular weight tail.
REFERENCES:
patent: 3278459 (1966-10-01), Herold
patent: 3404109 (1968-10-01), Milgrom
patent: 3427256 (1969-02-01), Milgrom
patent: 3829505 (1974-08-01), Herold
patent: 3941849 (1976-03-01), Herold
patent: 4472560 (1984-09-01), Kuyper et al.
patent: 4477589 (1984-10-01), van der Hulst et al.
patent: 5470813 (1995-11-01), Le-Khac
patent: 5482908 (1996-01-01), Le-Khac
patent: 5536883 (1996-07-01), Le-Khac
patent: 5545601 (1996-08-01), Le-Khac
patent: 5693584 (1997-12-01), Le-Khac
patent: 5712216 (1998-01-01), Le-Khac et al.
patent: 5714428 (1998-02-01), Le-Khac
patent: 5777177 (1998-07-01), Pazos
patent: 6013596 (2000-01-01), Le-Khac et al.
patent: 6018017 (2000-01-01), Le-Khac
patent: 6063897 (2000-05-01), Le-Khac et al.
patent: 6303533 (2001-10-01), Grosch et al.
patent: 6423662 (2002-07-01), Molzahn et al.
patent: 6696383 (2004-02-01), Le-Khac et al.
patent: 20030158449 (2003-08-01), Hofmann et al.
patent: 4-145123 (1952-05-01), None
patent: 5-17569 (1993-01-01), None
patent: 5-25267 (1993-02-01), None
patent: 0104180 (2001-01-01), None
patent: 0209875 (2002-02-01), None
Journal of Polymer Scienc Part A: Polymer Chemistry vol. 40, (month unavailable)(2000) pp. 1142-1150, Yi-Jun Huang, Guo-Rong Qi, Yu-Hua Wang, “Controlled Ring-Opening Polymeriation of Propylene Oxide Catalyzed by Double Metal-Cyanide Complex”.
Le-Khac Bi
Wang Wie
Bayer Antwerpen, J.V.
Bayer MaterialScience LLC
Gil Joseph C.
Mrozinski, Jr. John E.
Wood Elizabeth D.
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