Zone refining

Zone refining

A method for purifying solids based on the fact that solutes tend to concentrate in the liquid when a solution is frozen. A solid bar is drawn slowly over a heat source and melted in a narrow band; impurities are carried along in the melted band until the end of the bar is reached.

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Industry/Domain: Chemistry
Category: General chemistry
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zone refining

Science; General science

One of a number of techniques used in the preparation of high-purity materials. The technique is capable of producing very low impurity levels, namely, parts per million or less ...

zone refining

Chemistry; General chemistry

A method for purifying solids based on the fact that solutes tend to concentrate in the liquid when a solution is frozen. A solid bar is drawn slowly over a heat source and melted ...

zone refining

Mining; General mining; Mineral mining

A purification technique in which a molten or high-temperature zone is moved along a length of material to be purified to bring about impurity segregation; the impurities become ...

zone refining

Engineering; Electronic engineering

A method of purifying semiconductor materials (such as germanium and silicon) in which a molten zone in an ingot of the material moves along the length of the ingot, dissolving ...

refining

Industrial machinery; Industrial lubricants

A series of processes for converting crude oil and its fractions to finished petroleum products. Following distillation, a petroleum fraction may undergo one or more additional ...

refining

Printing & publishing; Paper

The mechanical treatment of pulp fibers to develop their papermaking properties.

centrifuge

Chemistry; General chemistry

Equipment used to separate substances based on density by rotating the tubes around a centred axis.

cell potential

Chemistry; General chemistry

The force in a galvanic cell that pulls electron through reducing agent to oxidizing agent.

conductor

Chemistry; General chemistry

Material that allows electric flow more freely.

cuvette

Chemistry; General chemistry

Glassware used in spectroscopic experiments. It is usually made of plastic, glass or quartz and should be as clean and clear as possible.

deionization

Chemistry; General chemistry

The removal of ions, and in water's case mineral ions such as sodium, iron and calcium.

deliquescence

Chemistry; General chemistry

Substances that absorb water from the atmosphere to form liquid solutions.

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