Publication

Improving selectivity and yield by conducting processes in a periodic fashion

Albert Renken
1974
Journal Articles

Abstract

Addnl. data considered in abstracting and indexing are available from a source cited in the original document. With a square-wave feed concn. variation, with a simple homogeneous or parallel reactions, a real advantage of periodic operation with a continuous stirred tank is not possible. With a higher order reaction, the ethanolamine-ethylene oxide reaction to form di- and triethanolamine, the selectivity and the space-time yield of the intermediate is strongly dependent on the frequency and unsymmetery of the input function. With appropriate concn. function, the selectivity for the intermediate product can be 37% higher than with steady operation. The space-time yield can increase 1.5% with a 17% increase of selectivity. [on SciFinder (R)]

Official source

https://infoscience.epfl.ch/entities/publication/cb2fe0a9-d9bd-40fc-8b19-141139bb7f28

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Albert Renken
1974
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/cb2fe0a9-d9bd-40fc-8b19-141139bb7f28

About this result

Related concepts (32)

Rate equation

In chemistry, the rate law or rate equation for a chemical reaction is a mathematical equation that links the rate of forward reaction with the concentrations or pressures of the reactants and constant parameters (normally rate coefficients and partial reaction orders). For many reactions, the initial rate is given by a power law such as where [\mathrm{A}] and [\mathrm{B}] express the concentration of the species \mathrm{A} and \mathrm{B}, usually in moles per liter (molarity, M).

Chemical reaction

A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can often be described by a chemical equation. Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes can occur.

Reaction rate

The reaction rate or rate of reaction is the speed at which a chemical reaction takes place, defined as proportional to the increase in the concentration of a product per unit time and to the decrease in the concentration of a reactant per unit time. Reaction rates can vary dramatically. For example, the oxidative rusting of iron under Earth's atmosphere is a slow reaction that can take many years, but the combustion of cellulose in a fire is a reaction that takes place in fractions of a second.

Related publications (1)

Improving selectivity and yield by conducting processes in a periodic fashion

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