EP0283148A2
Expired / Lapsed
EP
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Preparation of filterable double metal cyanide complex catalyst for alkylene oxide polymerisation
Assignee: Lyondell Chemical Technology LP
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Filing: 1988-02-25
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Granted: —
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Expires: 2008-02-25
Abstract
Abstract The double metal cyanide complex, e.g. metal hexacyanometallate, catalysts obtained by reacting metal salts and alkali metal cyanometallates are not easily separated from the reaction mixture because the particle size is too small to allow filtration under normal conditions. Centrifugation, dialysis, or conversion to a filterable metal hydroxide salt are the methods previously described for separating the alkali metal salt formed during reaction from the catalyst. Forming the complex in the presence of an inert filter-aid has been found to give a filterable catalyst which can be washed clean of the alkali metal salt and can be used without further treatment in the catalysis of the formation of propylene oxide polyols.
Inventors
- 👤 Stephen D. Harper
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 08:47
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/2663; B; B01; B01J; B01J27/00; B01J27/24; B01J27/26; C08G65/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
143 words
A process for preparing a double metal cyanide complex catalyst which comprises: (a) reacting in a liquid medium at least one metal salt selected from the group consisting of the salts of Zn(II), Fe(II), Fe(III), Co(II), Ni(II), Mo(IV), Mo(VI), Al(III), V(IV), V(V), Sr(II), W(IV), W(VI), Mn(II), and Cr(III), with at least one alkali metal cyanometallate selected from the group consisting of the metallates of Fe(II), Fe(III), Co(II), Co(III), Cr(III), Mn(II), Mn(III), V(IV), and V(V), in the presence of from about 0.01 to about 100 times the total weight of metal salt plus alkali metal cyanometallate of filter-aid particles to form a slurry of double metal cyanide complex catalyst and filter-aid particles dispersed in the liquid medium which has dissolved therein alkali metal salt formed during the reaction; and (b) recovering the double metal cyanide complex catalyst and filter-aid particles from the liquid medium.
Claim 2
Dependent Claim
143 words
A process for preparing a double metal cyanide complex catalyst which comprises: (a) reacting in a liquid medium at least one metal salt selected from the group consisting of the salts of Zn(II), Fe(II), Fe(III), Co(II), Ni(II), Mo(IV), Mo(VI), Al(III), V(IV), V(V), Sr(II), W(IV), W(VI), Mn(II), and Cr(III), with at least one alkali metal cyanometallate selected from the group consisting of the metallates of Fe(II), Fe(III), Co(II), Co(III), Cr(III), Mn(II), Mn(III), V(IV), and V(V), in the presence of from about 0.01 to about 100 times the total weight of metal salt plus alkali metal cyanometallate of filter-aid particles to form a slurry of double metal cyanide complex catalyst and filter-aid particles dispersed in the liquid medium which has dissolved therein alkali metal salt formed during the reaction; and (b) recovering the double metal cyanide complex catalyst and filter-aid particles from the liquid medium.
Claim 3
Dependent Claim
150 words
A process for preparing a double metal cyanide complex catalyst which comprises: (a) reacting in a liquid medium at least one metal salt selected from the group consisting of the salts of Zn(II), Fe(II), Fe(III), Co(II), Ni(II), Mo(IV), Mo(VI), Al(III), V(IV), V(V), Sr(II), W(IV), W(VI), Mn(II), and Cr(III), with at least one alkali metal cyanometallate selected from the group consisting of the metallates of Fe(II), Fe(III), Co(II), Co(III), Cr(III), Mn(II), Mn(III), V(IV), and V(V), to form a double metal cyanide complex; (b) adding from about 0.01 to about 100 times the total weight of the metal salt plus the alkali metal cyanometallate of filter-aid particles to form a slurry of double metal cyanide complex catalyst and filter-aid particles dispersed in the liquid medium which has dissolved therein alkali metal salt formed during the reaction; and (c) recovering the double metal cyanide complex catalyst and filter-aid particles from the liquid medium.
Claim 4
Dependent Claim
150 words
A process for preparing a double metal cyanide complex catalyst which comprises: (a) reacting in a liquid medium at least one metal salt selected from the group consisting of the salts of Zn(II), Fe(II), Fe(III), Co(II), Ni(II), Mo(IV), Mo(VI), Al(III), V(IV), V(V), Sr(II), W(IV), W(VI), Mn(II), and Cr(III), with at least one alkali metal cyanometallate selected from the group consisting of the metallates of Fe(II), Fe(III), Co(II), Co(III), Cr(III), Mn(II), Mn(III), V(IV), and V(V), to form a double metal cyanide complex; (b) adding from about 0.01 to about 100 times the total weight of the metal salt plus the alkali metal cyanometallate of filter-aid particles to form a slurry of double metal cyanide complex catalyst and filter-aid particles dispersed in the liquid medium which has dissolved therein alkali metal salt formed during the reaction; and (c) recovering the double metal cyanide complex catalyst and filter-aid particles from the liquid medium.
Claim 5
Dependent Claim
31 words
A process as claimed in claim 1 or claim 2 wherein said filter-aid is selected from alumina, silica gel, diatomaceous earth, silica, aluminum silicate, magnesium silicate, perlite, carbon black and charcoal.
Claim 6
Dependent Claim
19 words
A process as claimed in claim 1, claim 2 or claim 3 wherein said liquid medium is aqueous glyme.
Claim 7
Dependent Claim
27 words
A process as claimed in any one of claims 1 to 4 wherein said alkali metal of the alkali metal cyanometallate is selected from sodium and potassium.
Claim 8
Dependent Claim
27 words
A process as claimed in any one of claims 1 to 5 wherein said cyanometallate of said alkali metal cyanometallate is selected from hexacyanocobaltate, hexacyanoferrate and hexacyanochromate.
Claim 9
Dependent Claim
60 words
A process for the preparation of a propylene oxide polyol by reacting propylene oxide with a polyhydric initiator in the presence of a double metal cyanide complex catalyst characterised in that there is used as catalyst a mixture of double metal cyanide complex catalyst and filter-aid as prepared by the process claimed in any one of claims 1 to 6.
References Cited (Backward Citations)
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