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PRODUCTION OF ACETYLENE BY WET METHODS {(purification of acetylene C07C 7/00)}
Definition statement
This subclass covers:

Methods and apparatus for production of acetylene by wet methods, including arrangements for water feed and carbide feed; high-pressure acetylene generators; details of acetylene generators, e.g. carbide cartridges, carbide compositions, safety devices, sludge removal.

References relevant to classification in this subclass
This subclass does not cover:

Purification of acetylene

Gaseous fuel compositions containing acetylene

Absorbing compositions for acetylene

Use of gas-solvents or gas-sorbents for acetylene in vessels

Places in relation to which this subclass is residual:

Burners for combustion of a gasin association with a gaseous fuel source, e.g. acetylene generator

Informative references
Attention is drawn to the following places, which may be of interest for search:

Apparatus for generating gases by wet methods

Manufacture of acetylene by methods not comprising carbides

Engines or plants characterised by use of other specific gases, e.g. acetylene

Engine-pertinent apparatus for adding small quantities of acetylene

Valves, cocks, taps in general

Gas burners in association with a gaseous fuel source, e.g. an acetylene generator

Special rules of classification within this subclass

In the absence of an indication to the contrary, classification is made in the last appropriate place ("last place rule").

Glossary of terms
In this subclass, the following terms (or expressions) are used with the meaning indicated:

In this subclass, the following expression is used with the meaning indicated:

Wet methods for acetylene production

Traditionally acetylene is manufactured from calcium carbonate (limestone) and coal. The calcium carbonate is first converted into calcium oxide and the coal into coke, then the two are reacted together to form calcium carbide and carbon monoxide:CaO + 3C → CaC2 + COCalcium carbide (calcium acetylide) and water are then reacted by any of several methods to produce acetylene and calcium hydroxide, by a reaction discovered by Friedrich Wöhler in 1862.CaC2 + 2H2O → Ca(OH)2 + C2H2

Synonyms and Keywords

In patent documents the following expressions/words " acetylene", "ethyne", "C2H2" and "H-C≡C-H" are often used as synonyms.

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Last Modified: 10/11/2013