Examples of 'phosphonium salts' in a sentence
Meaning of "phosphonium salts"
phosphonium salts: Chemical compounds containing a positively charged phosphorus atom attached to four organic groups
How to use "phosphonium salts" in a sentence
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phosphonium salts
Quaternary ammonium and phosphonium salts are preferred.
Phosphonium salts are difficult to use because of their toxicity.
Additional suitable examples are acyloxy phosphonium salts.
The phosphonium salts may be chloride or bromide salts.
The nucleation agents also include quaternary phosphonium salts.
These phosphonium salts yield the corresponding phosphoranes.
Syntheses of phosphonium salts.
Useful phosphonium salts to serve as the catalyst include tetraphenylphosphonium halides.
This addition was necessary since catalytically inactive phosphonium salts were found.
Suitable quaternary phosphonium salts are known to the skilled person.
The vermiculite was chemically modified with alkyl phosphonium salts to improve compa.
The quaternary phosphonium salts may be used either singly or as combined.
Other conventional methods of preparing phosphonium salts may also be employed.
Examples of quaternary phosphonium salts are cetyltripropylphosphonium bromide and triphenylethylphosphonium bromide.
Their nucleophilicity is evidenced by their reactions with alkyl halides to give phosphonium salts.
See also
Quaternary ammonium salts and phosphonium salts are mentioned as suitable catalysts.
Phosphonium salts may be obtained from for instance a triarylphosphine with a halomethane.
Known phase transfer catalysts include tetralkyl ammonium halides and phosphonium salts.
Ammonium and phosphonium salts do not form part of the present invention.
The present invention relates to a novel process for tanning leather using phosphonium salts.
The phosphonium salts correspond structurally in all respects to the aforementioned ammonium salts.
The present invention relates to biocidal compositions comprising tetraorgano phosphonium salts and biocidal treatments therewith.
The ammonium and phosphonium salts may be unstable at the higher temperatures discussed herein.
Preferred suitable quaternary ammonium or phosphonium salts are,.
These quaternary ammonium and phosphonium salts have the following general formula in which.
Phosphonium salts are preferred, in particular the cited phosphonium halides.
Ammonium salts and / or phosphonium salts are preferred.
However, preference is given to the use of ammonium salts and / or phosphonium salts.
Of these, ammonium salts and phosphonium salts of sulfonic acids are preferred.
Examples of metal free tanning include use of oil, aldehyde or phosphonium salts.
A variety of phosphonium salts can be prepared by alkylation and arylation of organophosphines,.
Preference is given to using onium salts in the synthesis, more preferably phosphonium salts.
Of these deactivators, phosphonium salts or ammonium salts-based deactivators are preferred.
Phase transfer catalysts include tetralkylammonium salts, phosphonium salts and crown ethers.
Examples of the phosphonium salts include, for example, the following compounds.
Suitable as phase transfer catalyst are quaternary ammonium salts, tertiary amines or quaternary phosphonium salts.
Some of the above-mentioned phosphonium salts are known and available on market.
Preferred cationic species are quaternary ammonium salts, quaternary phosphonium salts and crown ethers.
The characteristics of the phosphonium salts prepared by the general procedure above are as follows,.
Suitable phase transfer catalysts are quaternary ammonium salts, tertiary amines or quaternary phosphonium salts.
The above-mentioned ammonium or phosphonium salts serve as stabilizers for the colloids.
Suitable cationic surfactants include, alkyl quaternary ammonium salts, and alkyl quaternary phosphonium salts.
A similar variety of phosphonium salts may be used, including tetraarylphosphonium salts, such as tetraphenylphosphonium bromide.
Onium salts such as quaternary ammonium salts, quaternary phosphonium salts are preferable among them.
The phosphonium salts ( I ) are novel compounds that have not been described in the literature.
Suitable cationic emulsifiers are, for example, alkyl quaternary ammonium salts, and alkyl quaternary phosphonium salts.
Concrete examples of the preferred phosphonium salts of the formula ( A ) are described below.
They commonly contain tertiary amino groups, basic nucleophilic groups, quaternary ammonium salts, or phosphonium salts.
The yields and other data of the produced phosphonium salts are set forth in Table 1.
Suitable cationic organic detergent include alkylamine salts, quaternary ammonium salts, sulphonium salts and phosphonium salts.
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Examples of using Phosphonium
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Use of phosphonium compounds in the production of leather
Quaternary ammonium and phosphonium salts are preferred
Many phosphonium halide reagents are commercially available
