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PRODUCTION OF ACETYLENE BY WET METHODS [N:(purification of acetylene C07C 7/00)]
Definition statement
This subclass/group 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/group 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/group, 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.

Acetylene gas generators with dropwise, gravity, non automatic water feed (valves, cocks F16K)
Acetylene gas generators with automatic water feed regulation by means independent of the gas-holder
Acetylene gas generators with automatic water feed regulation by the gas-holder
Acetylene gas generators with water feed by Kipp's principle
Acetylene gas generators according to Dobereiner's principle with fixed carbide bell
Acetylene gas generators with submersion of the carbide in water
Acetylene gas generation with combined dipping and drop-by-drop system
Acetylene gas generators with carbide feed, with or without regulation by the gas pressure
High-pressure acetylene gas generators
Other acetylene gas generators
Details of acetylene generators; Accessory equipment for, or features of, the wet production of acetylene
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Last Modified: 10/11/2013