Examples of 'transesterification catalyst' in a sentence
Meaning of "transesterification catalyst"
transesterification catalyst - A substance that accelerates or initiates the transesterification process, which involves the exchange of ester groups between molecules
How to use "transesterification catalyst" in a sentence
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Advanced
transesterification catalyst
Any known transesterification catalyst may be used.
The mixtures did not contain any transesterification catalyst.
The preferred transesterification catalyst is cobalt octoate.
The reaction is carried out using dibutyltin oxide as transesterification catalyst.
The transesterification catalyst may be homogeneous or heterogeneous.
The use of a heterogeneous transesterification catalyst is preferred.
The transesterification catalyst may be any transesterification catalyst.
The cobalt can act as a transesterification catalyst.
Any transesterification catalyst can be used.
A particularly preferred class of transesterification catalyst is the alkyl titanates.
A transesterification catalyst is provided to the mixture.
The reaction can be performed in the presence or absence of a transesterification catalyst.
A transesterification catalyst is also used.
The second step is preferably carried out in the presence of a transesterification catalyst.
The polymerization and transesterification catalyst can be the same or different.
See also
transesophageal echocardiography
transesterification
transesterification process
transesterification reaction
transesterification
transesterification process
transesterification reaction
The reaction generally proceeds in the presence of a catalytic amount of a transesterification catalyst.
A transesterification catalyst may be present or may the fed continuously in the reactor.
In one embodiment of the present invention the transesterification catalyst comprises tetramethylammonium hydroxide.
The reaction is generally carried out in the presence of a catalytic amount of a transesterification catalyst.
This material is an excellent transesterification catalyst for primary and secondary alcohols.
The reaction between hydroxy and carbonate groups is advantageously catalyzed by a transesterification catalyst.
The preferred transesterification catalyst is a combination of the acetates of cobalt and manganese.
This invention relates to a method for removing transesterification catalyst from polyether polyols.
A transesterification catalyst is present in reactor 2, which catalyst may be fed continuously to said reactor.
In one embodiment of the present invention the transesterification catalyst comprises tetrabutylphosphonium acetate.
This removes sodium ions from the liquid phase and neutralises the sodium methoxide transesterification catalyst.
Several methods for removing alkaline transesterification catalyst residuals from polyols are described in the literature.
In the transesterification method, it is necessary to use a transesterification catalyst.
Preferably, the transesterification catalyst is a tetraalkyl orthotitanate.
Reactor 2a does not contain any transesterification catalyst.
In addition, the transesterification catalyst such as manganese acetate is also added.
In the transesterification method, there may be used a transesterification catalyst.
Thus, specifically, the transesterification catalyst is a titanium containing catalyst.
The process of claim 1 performed in the presence of an esterification or transesterification catalyst.
In certain embodiments, the transesterification catalyst may be a basic transesterification catalyst.
The inorganic oxygen-containing compound may be acting as a transesterification catalyst.
Fresh alkyl titanate transesterification catalyst can be added as required vía line 67.
Said step ( v ) may be performed in the presence of a heterogeneous transesterification catalyst.
After introducing reaction raw material, transesterification catalyst is introduced to initiate reaction.
Heating after the addition, as described below, can efficiently inactivate a transesterification catalyst.
In the presence of an esterification and / or transesterification catalyst and an etherification-limiting agent.
Additionally, as mentioned above, polymer deposition may also affect the performance of a transesterification catalyst.
In a polythiourethane of the present invention, the transesterification catalyst preferably comprises a basic compound.
Thereto, the alkylene carbonate and the alkanol are reacted in the presence of a transesterification catalyst.
Preferably, the transesterification catalyst is a titanium alkoxide wherein the alkoxide group contains 1 to 6 carbon atoms.
In one embodiment, the polyester resin is prepared with a transesterification catalyst.
When the transesterification catalyst is an acid, it can be a Brønsted acid or Lewis acid.
The process of claim 1, wherein the lanthanum compound transesterification catalyst is a hydrate.
Any suitable transesterification catalyst can be employed in step ( i ).
Next, a method for producing a polycarbonate diol by using a transesterification catalyst is exemplified below.
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Examples of using Transesterification
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The chemical reactions are transesterification and esterification
Transesterification occurs under these reaction conditions
They may also be made by transesterification routes
Examples of using Catalyst
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The substance was a catalyst containing copper acetylide
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