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 Wysłany: Czw 0:30, 30 Gru 2010 Temat postu: Hydrolysis of imidazoline surfactant mechanism _74 |
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Hydrolysis of imidazoline surfactant mechanism
(2) {1 noon activity coefficient of 1,0 C: C. + KeqC. C. A + (5),, 0HCJ = C ±-Co Ⅱ a C-oH - + Ke-q (C-oH-a) lK (6) generation, equation (2), rearrangement was: CIOH = so x will be (7) generation (4), we have: ... CCKeqOH-K x ¨ oH A + (C) + I ... ~ in any of the reaction process, Con A celery iiCno are constant, so as a constant, punishing the above equation can be rewritten as : = K ・ c】 tx = listless device ~ C ~ zo. (CH: vend x derived results with the experimental data set to be a complete base line hydrolysis kinetics equation. In addition also can be seen from the above equation, K and the OH concentration and the pH is really off when CoH a lot, then ( 9) the denominator of towels, Zhou two dominant compared with the Ki, Kt ≥ q is generally larger, so the Keq ・ Coil>) 1. At this point K and Co. Nothing. Can be seen, K increases with a pH a maximum value exists,moncler doudoune, this reasoning is consistent with Figure 2. If the rate constant expression to consider the impact of activity coefficients, Ha n according to (1), (9) of the correction equation for the K Lu keq, Cai. ・ (CoH ') a C. H a (Keq.C. H a ¨) '. YoH ・ Ah I \The changes, which said that i salt effect. f the experimental data listed in Table 3. can be seen from Figure 3,4, C-rI or CI-I system in the case of low pH,mbt shoes women, salt effect more apparent than pH High on the salt effect was negligible. This fact can be used in daily chemical industry in Table 5 under different plt, J Jia added after electrolysis rate of hydrolysis to be a few left. 1989 6,tory burch outlet,8 hydrolysis! inhibited i0.O11.512.oI4, Figure 3C ¨ 3o55.22209.3013.O313.4o a system of salt and a drum I should be (10) be explained. at low pH,, Co. a (K0ac. lr +1) compared to the smaller items, a prominent role in the later, with the increase of ion concentration in solution,ugg italia, flavor oxazoline (I) is a neutral molecule, it changed little l Ah, but one flesh IH OH are ionic, YoH ', YIH will decreased significantly. So adding strong electrolyte solution activity coefficients caused by this change, resulting in the apparent rate constant decreased, showing the salt effect. in the high pH case, cow-KeqC. a +1) is relatively large, the role of prominent, while Keq is generally not with the change in solution ionic strength, which at high pH, the observed rate constant is less the solution ionic strength, pH continues to rise, becoming more equal between the two . theory of dynamic equations on all of the above results were well explained, but also strong support for the long-chain alkyl oxazoline squint under alkaline conditions the hydrolysis is carried out according to the following mechanism: inhibition 0.991O {bearing solutions 553 swollen. Iwaki a gate midship RCONHC \, the second parallel reaction ignored. Under acidic conditions, a / I -, N. -CH, CH, O \cl】 cJH)】 'and acidification of imidazoline (IH) and water do not occur in response to further hydrolytic ring, which have been protected. The theory of dynamic equations obtained earlier is also in the establishment of such a view,ugg boots ireland, which with the experimental inhibition of imidazoline acid hydrolysis is consistent with the conclusions of finished base.
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