High-performance liquid chromatography of compounds obtained during the production of N-nitrosodiphenylamine

Vodička, L.; Kříž, J.; Burda, Jaroslav V.; Novák, Petr

doi:10.1016/s0021-9673(00)99344-0

Cited by 2 publications

(1 citation statement)

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“…Since the phenyls in the NDPA molecule cannot be distorted or bent, they should not enter the channels of zeolites NaA and KA; that is to say, the NDPA molecule cannot adsorb into the channel of the zeolite until it inserts the N-N=O group in the pore mouth of the adsorbent. On the other hand, the bond energy between the two nitrogen atoms in the NDPA molecule is only 11 kcal mol À1 , smaller than that in NDMA (dimethylnitrosamine, 52 kcal mol À1 ), 15 it should be the easiest nitrosamine to degrade on zeolites at ambient temperature.…”

Section: Introductionmentioning

confidence: 95%

Adsorption and room temperature degradation of N-nitrosodiphenylamine on zeolites

Zhou

Yun

et al. 2004

New J. Chem.

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N-Nitrosodiphenylamine (NDPA) is selected as a model compound to reveal the specific adsorption and catalytic function of zeolites in the removal of carcinogenic nitrosamines from the environment. The bulky NDPA molecule is indeed adsorbed in the zeolite KA having a small aperture, by insertion of the -N-N=O group into the channel and involving a specific interaction between the nitrosamine and the zeolite. Degradation of NDPA at room temperature on zeolite is reported for the first time, revealing the potential applicability of zeolites to eliminate nitrosamines under mild conditions. The acidity of zeolite is the key factor determining its ability to degrade NDPA and, among the zeolites evaluated, Hb is the most effective catalyst with an activity much higher than that of other zeolites at ambient temperature. NJC

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Section: Introductionmentioning

confidence: 95%