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contact process

noun, Chemistry
a catalytic method for producing sulfuric acid from sulfur dioxide and oxygen.
1900-05 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Encyclopedia Article for contact pro-cess

contact process

modern industrial method of producing sulfuric acid; it has largely replaced the chamber, or lead-chamber, process. Sulfur dioxide and oxygen, passed over a hot catalyst, unite to form sulfur trioxide, which in turn combines with water to make sulfuric acid.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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