Elemental Chlorine

Some articles on chlorine, elemental chlorine, elemental:

Chlor - History
... The most common compound of chlorine, sodium chloride, has been known since ancient times archaeologists have found evidence that rock salt was used as early as 3000 BC and brine as early as 6000 BC ... Around 1630, chlorine was recognized as a gas by the Belgian chemist and physician Jan Baptist van Helmont ... Elemental chlorine was first prepared and studied in 1774 by Swedish chemist Carl Wilhelm Scheele, and, therefore, he is credited for its discovery ...
Chlor
... Chlorine is a chemical element with symbol Cl and atomic number 17 ... Chlorine is in the halogen group (17) and is the second lightest halogen after fluorine ... highest electronegativity of all the elements for this reason, chlorine is a strong oxidizing agent ...
Bleaching Of Wood Pulp - Environmental Considerations
... Conventional bleaching using elemental chlorine produces and releases into the environment large amounts of chlorinated organic compounds, including chlorinated dioxins ... As a result, from the 1990 onwards the use of elemental chlorine in the delignification process was substantially reduced and replaced with ECF (Elemental ... In 2005, elemental chlorine was used in 19-20% of kraft pulp production globally, down from over 90% in 1990 ...
Bell Bay Pulp Mill - Opposition
... accepted technology for the bleaching process and instead involved the presence of elemental chlorine at an intermediate stage (rather than hydrogen peroxide or ... an 'integrated' process could cause the bleaching chemical chlorine dioxide to be contaminated with elemental chlorine ... Elemental chlorine contamination of the chlorine dioxide bleaching chemical could in turn lead to the release of persistent organic pollutants (dioxins), potentially causing environmental harm and a subsequent ...

Famous quotes containing the word elemental:

    But the lightning which explodes and fashions planets, maker of planets and suns, is in him. On one side elemental order, sandstone and granite, rock-ledges, peat-bog, forest, sea and shore; and on the other part, thought, the spirit which composes and decomposes nature,—here they are, side by side, god and devil, mind and matter, king and conspirator, belt and spasm, riding peacefully together in the eye and brain of every man.
    Ralph Waldo Emerson (1803–1882)