Determination of Sulphate Acid Ester in Unstabilized Cellulose Nitrate by the Hydrolysis Method

Gagnon, Paul E.; Keirstead, Karl F.; Newbold, Brian T.

doi:10.1139/v58-041

Cited by 5 publications

(9 citation statements)

References 3 publications

(3 reference statements)

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“…Samples were then set aside for moisture, nitrogen, and sulphate determinations (3). The per cent sulphate acid ester contents of the cellulose nitrates were determined by the hydrolysis method (6).…”

Section: Cellulose Nitratementioning

confidence: 99%

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Hydrolysis of Sulphate Acid Ester in Unstabilized Cellulose Nitrates

Gagnon¹,

Keirstead²,

Newbold³

et al. 1958

Can. J. Chem.

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The rate of hydrolysis of the sulphate acid ester in unstabilized cellulose nitrates in acetone/ water solution a t 25' C. has been studied. The rate of hydrolysis in 90% acetone/water was too slo\\l to produce a measurable increase in acidity during 24 hours. In 99% acetone/water solution the initial hydrolysis was \:cry rapid and was followed by slower hydrolysis which was complete after 24 hours. Si~nilar results were obtained with wood cellulose nitrates.In the case of cotton cellulose nitrates, there was an indication that hydrolysis of the sulphate acid ester decreased as the nitrogen content increased. The rate of hydrolysis of the sulphate acid ester in both cotton and wood cellulose nitrates was \-ery similar to that of the sulphate acid ester in cellulose acetate sulphate.

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Section: Cellulose Nitratementioning

confidence: 99%

“…The initial acidity of moist samples of cellulose nitrate in which there was no hydrolysis was determined by titration in goy0 acetone/water solution, using the method recently described (6).…”

Section: Hydrolysis Of Sulphate Acid Ester In Unstabilized Cellulose mentioning

confidence: 99%

Hydrolysis of Sulphate Acid Ester in Unstabilized Cellulose Nitrates

Gagnon¹,

Keirstead²,

Newbold³

et al. 1958

Can. J. Chem.

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“…The proportion of the slurry titer value due to sulphate acid ester can be calculated using the sulphate acid ester content obtained by the hydrolysis method (6). The portion of the slurry titer due to sulphate acid ester can be converted to sulphate, expressed as yo HzSO.r, by using 98 as the equivalent weight of the ester.…”

Section: Determination By Slurry Titration Of the Total: Szslpkate Comentioning

confidence: 99%

“…An example serves to illustrate the calculations involved. For instance, a cotton cellulose nitrate was shown to contain 96y0 sulphate acicl ester by the hydrolysis method (6). The slurry titer expressed as rnl./g.…”

Section: Determination By Slurry Titration Of the Total: Szslpkate Comentioning

confidence: 99%

“…Recently, the hydrolysis method for determining the sulphate acid ester was carefully studied (6). T h e object of the present work was to evaluate the slurry titration of unstabilized cellulose nitrate in water and t o investigate the possibility of using this type of titration for determining the sulphate acid ester coi~tent of unstabilized cellulose nitrate.…”

Section: Introductionmentioning

confidence: 99%

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Slurry Titrations of Unstabilized Cellulose Nitrate

Gagnon¹,

Keirstead²,

Newbold³

1958

Can. J. Chem.

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Slurry titrations were performed on unstabilized cotton and wood cellulose nitrates. The results for total sulphate were compared with those from gravimetric, 24-hour, and zero hydrolysis methods. The agreement was best in the case of wood cellulose nitrates. The ester sulphate contents obtained were also compared with those from 24-hour and zero hydrolysis. The agreement was again best in the case of wood cellulose nitrates. It was shown that slurry titration for the determination of sulphate acid ester could be used for wood cellulose nitrates containing not less than 100% sulphate ester, the error being −2.7 to −11.9%. For cotton cellulose nitrates, the results were not satisfactory.

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Simple, Rapid and Precise Determination of Free Sulfuric Acid in Unstabilized Cellulose Nitrate by the Lead Nitrate-Dithizone Titration Method

Dawoud

Hamed

2001

Propellants Explos. Pyrotech.

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Determination of Sulphate Acid Ester in Unstabilized Cellulose Nitrate by the Hydrolysis Method

Cited by 5 publications

References 3 publications

Hydrolysis of Sulphate Acid Ester in Unstabilized Cellulose Nitrates

Hydrolysis of Sulphate Acid Ester in Unstabilized Cellulose Nitrates

Slurry Titrations of Unstabilized Cellulose Nitrate

Simple, Rapid and Precise Determination of Free Sulfuric Acid in Unstabilized Cellulose Nitrate by the Lead Nitrate-Dithizone Titration Method

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