Isothermal kinetics of carbothermic reduction of ilmenite concentrate with the addition of sodium carbonate

The kinetics of the reaction of solid sodium carbonate with sulfur dioxide depends on the microstructure of the solid, which in turn is affected by the way and conditions of its preparation. The active form, analogous to that obtained by thermal decomposition of NaHCO3, emerges from the dehydration of Na2CO3 . 10 H2O in a vacuum or its weathering in air at room temperature. The two active forms are porous and have approximately the same specific surface area. Partial hydration of the active Na2CO3 in air at room temperature followed by thermal dehydration does not bring about a significant decrease in reactivity. On the other hand, if the preparation of anhydrous Na2CO3 involves, partly or completely, the liquid phase, the reactivity of the product is substantially lower.

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Isobaric and isothermal kinetics of gelatinization of waxy maize starch

Journal of Food Engineering ◽

10.1016/j.jfoodeng.2007.02.056 ◽

2007 ◽

Vol 82 (4) ◽

pp. 443-449 ◽

Cited By ~ 11

Author(s):

Shyam S. Sablani ◽

S. Kasapis ◽

Z.H. Al-Tarqe ◽

I. Al-Marhubi ◽

M. Al-Khuseibi ◽

...

Keyword(s):

Isothermal Kinetics ◽

Maize Starch ◽

Waxy Maize ◽

Kinetics Of

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Carbothermic reduction kinetics of nanocrystallite Fe2O3/NiO composites for the production of Fe/Ni alloy

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2008.02.026 ◽

2008 ◽

Vol 463 (1-2) ◽

pp. 585-590 ◽

Cited By ~ 24

Author(s):

K.S. Abdel-Halim ◽

M.H. Khedr ◽

M.I. Nasr ◽

M.Sh. Abdel-wahab

Keyword(s):

Carbothermic Reduction ◽

Reduction Kinetics ◽

Ni Alloy ◽

Kinetics Of

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Isothermal and non-isothermal kinetics of hydrolysis of 1-[2-(2- pentyloxyphenylcarbamoyloxy)-(2-methoxymethyl)-ethyl]- perhydroazepinium chloride (BK 129)

Acta Facultatis Pharmaceuticae Universitatis Comenianae ◽

10.2478/afpuc-2013-0018 ◽

2013 ◽

Vol 60 (2) ◽

pp. 43-48

Author(s):

Stankovičová M. ◽

Bezáková Ž. ◽

Beňo P. ◽

Húšťavová P.

Keyword(s):

Biological Activity ◽

Alkaline Hydrolysis ◽

Functional Group ◽

Isothermal Kinetics ◽

Basic Part ◽

Buffer Solutions ◽

Kinetics Of Hydrolysis ◽

Short Time ◽

Kinetics Of ◽

Hydrolysis Of

Abstract The substance BK 129 - 1-[2-(2-pentyloxyphenylcarbamoyloxy)-(2-methoxymethyl)-ethyl]-perhydroazepinium chloride was prepared in terms of influence of the connecting chain between the carbamate functional group and the basic part of molecule on biological activity. Such a structural feature is important with regard to its stability. In this work we determined the rate constants of alkaline hydrolysis of this compound at increased temperature under isothermal and non-isothermal conditions. The hydrolysis was also performed in buffer solutions with the purpose of evaluating its stability. Non-isothermal tests of stability enable to reduce the number of analyses. The necessary data for stability of compound are in this way achieved in a short time.

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