Examples of 'p-toluene' in a sentence
Meaning of "p-toluene"
P-toluene (noun): A chemical compound used in the production of dyes and pharmaceuticals
How to use "p-toluene" in a sentence
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p-toluene
A most preferred catalyst is p-toluene sulfonic acid.
Pyridine or p-toluene sulphonic acid may also be used.
An alternative catalyst is p-toluene sulphonic acid.
For example, p-toluene sulfonic acid can be used in form of its aqueous solution.
A suitable acid is p-toluene sulfonic acid.
A p-toluene sulfonic acid wash followed, then a water wash was performed until neutral.
One preferred acid catalyst is p-toluene sulfonic acid.
The p-toluene sulphonic acid was supplied by Degussa.
The preferred sulphonic acid is p-toluene sulphonic acid.
As the Lewis acid, p-toluene sulfonic acid or titanium tetrachloride may be used.
A non - limiting example of a sulfonylchloride agent includes p-toluene sulfonylchloride.
It has been found that p-toluene sulfonic acid is a suitable acid catalyst.
Exemplary acids include hydrochloric acid or p-toluene sulfonic acid.
The other acids are p-toluene sulfonic acid and sulfuric acid.
The polymerization reaction is catalyzed by the addition of p-toluene sulfonic acid.
See also
Other sulfonyl hydrazides such as p-toluene sulfonyl hydrazide can be used, if desired.
Typical acid catalysts include sulfuric, hydrochloric and p-toluene sulfonic acid.
Typical of such compounds are betaine p-toluene sulfonate and betaine dodecyl benzene sulfonate.
The orthoformate used is preferably ethyl orthoformate in the presence of p-toluene sulfonic acid.
More preferably, xylenesulphonic acid or p-toluene sulphonate or mixtures thereof are used.
Also suitable as transesterification catalysts are acids such as sulfuric acid, and p-toluene sulfuric acid.
Step 4 is a method of introducing a p-toluene sulfonyl group into the hydroxyl group.
Examples thereof include trifluoroacetic acid, methane sulfonic acid and p-toluene sulfonic acid.
In this context, p-toluene sulfonic acid is mentioned but not specifically used.
Aromatic sulfonic acids which may be used include p-toluene sulfonic acid.
Preferably, p-toluene sulfonic acid, methanesulfonyl chloride or acid-washed molecular sieves are used.
Process according to claim 2 wherein the tosyl halide is p-toluene sulfonyl chloride.
Then 1.8 g p-toluene sulfonic acid methyl ester is added while stirring at room temperature.
Examples of suitable homogeneous catalysts are p-toluene sulphonic acid and sulphuric acid.
A catalytic amount of p-toluene sulfonic acid was added and the mixture heated with stirring to 60°C.
The associated anions are mainly the anions of the p-toluene sulfonic acid formed.
Application, P-Toluene Sulfonic Acid used as catalyst or pharmaceutical use.
The catalyst for this reaction can be for example p-toluene sulphonic acid.
Furthermore, a modified resin using p-toluene sulfonamide, caprolactam and the like can be also utilized.
The cyclization can also be performed using protic acids, such as p-toluene sulfonic acid.
Organic sulphonic acids, for example p-toluene sulphonic acid and trifluoromethyl sulphonic acid, are preferred.
Examples of alkyl benzene sulfonates include dodecyl benzene sulfonate, p-toluene sulfonate and the like.
P-Toluene Sulfonic Acid ( PTSA ) thus enables to improve the fluidization kinetics of polycarboxylate ether.
Preferred protecting groups include methyl group, p-toluene sulfonyl group and methanesulfonyl group.
P-toluene sulfonic acid in an amount of 0.15 % was added as a catalyst to effect esterification.
Suitable acids include paratoluene sulfonic acid or a dry mineral acid, preferably p-toluene sulfonic acid.
P-toluene sulfonyl chloride ( 7 mg ) was added into the resultant solution.
The process of Claim 3 wherein the solid state polymerisation catalyst is p-toluene sulfonic acid.
Finally, 5 % of p-toluene sulphonic acid was added, which acted as an acid catalyst.
Low-temperature hydrolysis catalyzed by p-toluene sulfonic acid.
Example 1 was repeated using p-toluene sulfonic acid at 0.5 percent in isopropyl alcohol.
Especially preferred are dibutyltindilaurate, 2-diethylaminoethanol and p-toluene sulfonic acid.
As the catalyst, sulfuric acid or p-toluene sulfonic acid may, for example, be used.
A method according to claim 15, wherein said initiator compound is a blocked p-toluene sulphonic acid.
The 5 ' - ethanol group is converted to a p-toluenesulfonyl group with p-toluene sulfonyl chloride in pyridine.
