chemical conversion

chemical conversion

[′kem·i·kəl kən′vər·zhən]
(computer science)

Chemical conversion

A chemical manufacturing process in which chemical transformation takes place, that is, the product differs chemically from the starting materials. Most chemical manufacturing processes consist of a sequence of steps, each of which involves making some sort of change in either chemical makeup, concentration, phase state, energy level, or a combination of these, in the materials passing through the particular step. If the changes are of a strictly physical nature (for example, mixing, distillation, drying, filtration, adsorption, condensation), the step is referred to as a unit operation. If the changes are of a chemical nature, where conversion from one chemical species to another takes place (for example, combustion, polymerization, chlorination, fermentation, reduction, hydrolysis), the step is called a unit process. Some steps involve both, for example, gas absorption with an accompanying chemical reaction in the liquid phase. The term chemical conversion is used not only in describing overall processes involving chemical transformation, but in certain contexts as a synonym for the term unit process. The chemical process industry as a whole has tended to favor the former usage, while the petroleum industry has favored the latter. See Chemical process industry, Unit processes

Another usage of the term chemical conversion is to define the percentage of reactants converted to products inside a chemical reactor or unit process. This quantitative usage is expressed as percent conversion per pass, in the case of reactors where unconverted reactants are recovered from the product stream and recycled to the reactor inlet. See Chemical engineering

References in periodicals archive ?
Objective: The co2exide project aims at the development of a combined electrochemical-chemical technology for the simultaneous 200% conversion of co2 to ethylene at the cathode, Water oxidation to hydrogen peroxide at the anode and a subsequent chemical conversion of both intermediates to ethylene oxide and oligo-/polyethylene glycol in a cascade, Boosting this technology from trl4 to trl6.
The spiky surface is likely what made the difference in this case, according to the researchers' initial analysis, since it provided a large number of reactive sites to facilitate the chemical conversion.
Currently, Chinese converters introduce a significant bottleneck in delivering the resource to end-users through domination of the necessary chemical conversion process.
They designed chemical reactors where captured CO2 was converted into sodium bicarbonate rather than sodium carbonate, reducing the chemical conversion steps from seven to two.
Strategically located in Jubail Industrial City, Sadara and its integrated PlasChem value park will become a hub for chemical conversion plants, manufacturers, and associated service industries, potentially generating thousands of direct and indirect jobs for Saudis.
There are a lot of methods of magnesium alloy chemical conversion film processing, according to the different treatment liquid ingredients can usually be divided into chromate, organic acids, potassium permanganate and zirconium fluoride acid salt system, are often used, technology is the most mature processing solution is chromate based chemical treatment solution.
Offering repeated precise measurements at many stages, the spectrometer can be used for quality checks for incoming material, measurement of product characteristics like identity and purity and evaluation of secondary component characteristics, as well as monitoring reaction progress during chemical conversion for safety and production performance.
Mechanically activated chemical conversion of gaseous hydrocarbons.
The sales engineer's primary responsibility is to help coordinate sales quotes for casting, machining, and all secondary operations such as machining and chemical conversion.
Remember, in the aerobic energy system, oxygen is required to create the chemical conversion of glucose and glycogen into useable fuel.
He holds 20 patents in the area of catalysis and chemical conversion of biomass to chemicals.
Gale brings over 20 years of experience directing research operations in combustion, gasification, and chemical conversion test environments for exploration and assessment of new technologies on a variety of environmental products addressing NOx, SOx, CO2, and mercury emissions, along with alternative fuels and advanced power systems.

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