Consecutive Reactions

Consecutive Reactions


chemical processes in which the product of one reaction is the initial material for other reactions. Consecutive reactions include chemical processes such as polymerization and thermal cracking and chlorination of hydrocarbons. In cracking, the consecutive conversion of macro-molecular compounds into compounds of lower and lower molecular weight takes place at the same time as consecutive processes of formation of macromolecular hydrogen-poor compounds, such as coke. The compounds CH3Cl, CH2Cl2, CHCl3, and CCl4 are formed consecutively upon chlorination of methane.

An example of a simple consecutive reaction is the consecutive occurrence of two irreversible first-order reactions ABC, where A, B, and C are certain substances. The change in concentration of the substances may be calculated by integrating a system of two kinetic equations. The calculation shows that the concentration of intermediate compound B at first increases to a maximum and then decreases.

A more complex description of consecutive reactions is obtained if the reversibility of the individual reactions and the participation of the various initial compounds in the reactions are considered.


Emanuel’, N. M., and D. G. Knorre. Kurs khimicheskoi kinetiki. Moscow, 1962.
Rodigin, N. M., and E. N. Rodigina. Posledovatel’nye khimicheskie reaktsii: Matematicheskii analiz i raschet. Moscow, 1960.
Benson, S. Osnovy khimicheskoi kinetiki. Moscow, 1964. (Translated from English.)
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Allergic transfusion reactions: An evaluation of 273 consecutive reactions. Arch Pathol Lab Med 2003;127:316-20.
The recovered catalyst was used for five consecutive reactions with no significant loss of activity (Figure 3) (for general cyclic procedure, see SI 2.3 S2).
Chromatographic analysis of by-products, that is, propylene glycol (PG) and products of its consecutive reactions with PC (dipropylene glycols and tripropylene glycols), was performed with gas chromatograph Agilent Technologies 7890 A GC with FID detector.
Theoretically, the methanolysis process takes place under three consecutive reactions as shown in Figure 1.
It consists of a sequence of three consecutive reactions where triglycerides are converted to diglycerides; diglycerides are converted to monoglycerides followed by the conversion of monoglycerides to glycerol.
[3] found that combustion of crude oil in porous media proceeds according to several consecutive reactions analysing the produced gases emitted from a small packed reactor.
However, the test of consistence (assumed here) requires that Reactions 1 and 2 must be consecutive reactions: first Reaction 1, afterwards Reaction 2.
GC procedures require a long derivatization time in 2 consecutive reactions of 60-90 min to generate the aldonitrile pentaacetate derivative.
The rate-determining step of the consecutive reactions, peroxide [right arrow] alkoxy radical [right arrow] polymer chain radical, is the homolytic cleavage of the peroxide.
Non-isothermal kinetic study of weight loss under the combustion process is extremely complex for a mixture of OS and semicoke because of the presence of numerous complicated components and parallel and consecutive reactions taking place [12-15].
The combined use of these measurements has shown that thermal decomposition of oil shale involves two consecutive reactions with bitumen as an intermediate.