Examples of 'metal cyanide' in a sentence
Meaning of "metal cyanide"
metal cyanide: This phrase denotes a class of chemical compounds containing a metal atom bound to a cyanide molecule
How to use "metal cyanide" in a sentence
Basic
Advanced
metal cyanide
Improved double metal cyanide catalysts are needed.
In some embodiments the cyanide is an alkali metal cyanide.
Improved double metal cyanide complex catalysts.
The reaction is carried out in the presence of a metal cyanide reagent.
Improved double metal cyanide catalysts are disclosed.
Process for rapid activation of double metal cyanide catalysts.
A double metal cyanide compound comprising.
Ethoxylate production using highly active double metal cyanide catalysts.
Suitable double metal cyanide catalysts are well known.
Purification of polyols prepared using double metal cyanide complex catalysts.
A silylated double metal cyanide complex catalyst comprising zinc hexacyanocobaltate.
The polyols are preferably prepared utilizing double metal cyanide complex catalysts.
Any suitable double metal cyanide complex catalyst may also be used.
Conventional potassium hydroxide catalysts or double metal cyanide catalysts can be used.
The metal cyanide salt may contain one or more of these metals.
See also
Highly active double metal cyanide complex catalysts.
Metal cyanide complexes are becoming increasingly important alkylene oxide polymerization catalysts.
The polyols are formed using metal cyanide complex catalysts.
The metal cyanide salt can contain one or more of these metals.
An example of the cyanating agent is an alkali metal cyanide such as sodium cyanide.
Method for preparing metal cyanide catalysts using polymerizable complexing agents.
The mixture is stirred until all of the metal cyanide salt dissolves.
The composite metal cyanide complex catalyst can be produced by known production methods.
Process for purifying polyols made with double metal cyanide catalysts.
Preparation of filterable double metal cyanide complex catalyst for alkylene oxide polymerisation.
Method for purifying polyether polyols made with double metal cyanide catalysts.
A double metal cyanide catalyst is used for the preparation of the polyether polyol.
The catalyst may be a standard basic oxyalkylation catalyst or preferably a double metal cyanide complex.
The double metal cyanide catalyst is usually complexed with an organic complexing agent.
More preferably the cyanide source is an alkali metal cyanide most preferably sodium cyanide.
The use of alkali metal cyanide may pose pollution problems at the industrial level.
Other suitable catalysts include organometallic epoxide polymerization catalysts such as double metal cyanide compounds.
The alkali metal cyanide used in the reaction is preferably sodium cyanide or potassium cyanide.
Condensing said compound of formula VIII with an alkali metal cyanide and ammonium carbonate.
The double metal cyanide catalyst has the formula,.
In some aspects, the cyanide is an alkali metal cyanide.
The metal cyanide catalyst can be represented by the general formula,.
When k is zero, crystalline double metal cyanide compounds are preferred.
Typically, the cyanide ion source may be an alkali metal cyanide.
The concentration of double metal cyanide complex catalyst in the polyol was 30 ppm.
A process according to claim 1, in which the cyanide source is an alkali metal cyanide.
In this embodiment, crystalline double metal cyanide catalysts are preferred.
Examples of the metal cyanide are sodium cyanide, potassium cyanide and copper cyanide.
However, it is preferable to employ double metal cyanide complex catalysts.
A suitable metal cyanide is, for example, a heavy metal cyanide such as zinc cyanide.
Mixing a polyol starter with a double metal cyanide catalyst ; and.
Cyanide or metal cyanide contaminations have become serious environmental and food-health problems.
Mixtures of different water-soluble metal cyanide salts may be employed, if desired.
The process as claimed in claim 1, wherein the catalyst is a double metal cyanide catalyst.
However, catalysts such as composite metal cyanide complex catalysts can also be used.
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