C10H PRODUCTION OF ACETYLENE BY WET METHODS
Introduced: September 1968
Description
C10H covers chemical processes for acetylene production using wet methods, primarily through the reaction of calcium carbide with water. This subclass encompasses the equipment, reaction conditions, and purification techniques essential to acetylene generation via hydrolysis. Typical inventions include carbide reactors, acetylene scrubbers, and systems for removing impurities such as phosphine and hydrogen sulfide from the product gas. This classification excludes dry methods of acetylene production and other synthesis routes for acetylene (covered elsewhere in C10).
Additional Content IPC
Glossary
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 → CaC 2 + CO Calcium 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. CaC 2 + 2H 2 O → Ca(OH) 2 + C 2 H 2
Limiting references
Purification of acetylene
IPC and CPC are identically structured here. All 11 subcodes exist in both systems.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- C10H 1/00 Acetylene gas generators with dropwise, gravity, non-automatic water feed (valves, cocks F16K) IPC+CPC Available in IPC and CPC
- C10H 11/00 Acetylene gas generators with submersion of the carbide in water IPC+CPC Available in IPC and CPC
- C10H 13/00 Acetylene gas generation with combined dipping and drop-by-drop system IPC+CPC Available in IPC and CPC
- C10H 15/00 Acetylene gas generators with carbide feed, with or without regulation by the gas pressure IPC+CPC Available in IPC and CPC
- C10H 21/00 Details of acetylene generators; Accessory equipment for, or features of, the wet production of acetylene IPC+CPC Available in IPC and CPC
- C10H 3/00 Acetylene gas generators with automatic water feed regulation by means independent of the gas-holder IPC+CPC Available in IPC and CPC
- C10H 5/00 Acetylene gas generators with automatic water feed regulation by the gas-holder IPC+CPC Available in IPC and CPC
- C10H 7/00 Acetylene gas generators with water feed by Kipp's principle IPC+CPC Available in IPC and CPC
- C10H 9/00 Acetylene gas generators according to Dobereiner's principle with fixed carbide bell IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class C10,2013–2023, worldwide · Source: EPO PATSTAT
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 8,875
- SAUDI ARABIAN OIL COMPANY SA 2,245
- PETROCHINA COMPANY 2,028
- EXXONMOBIL RESEARCH AND ENGINEERING COMPANY US 1,980
- IFPEN (IFP ENERGIES NOUVELLES) FR 1,963
- SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ NL 1,878
- CHINESE ACADEMY OF SCIENCES 1,829
- UNIVERSAL OIL PRODUCTS COMPANY (UOP) US 1,787
- LUBRIZOL CORPORATION US 1,277
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 1,268
Top Applicants (CPC)
Class C10,2013–2023, worldwide · Source: EPO PATSTAT
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 5,831
- SAUDI ARABIAN OIL COMPANY SA 2,918
- IFPEN (IFP ENERGIES NOUVELLES) FR 2,305
- EXXONMOBIL RESEARCH AND ENGINEERING COMPANY US 2,282
- UNIVERSAL OIL PRODUCTS COMPANY (UOP) US 2,268
- SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ NL 2,124
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 1,487
- CHEVRON CORPORATION US 1,400
- PETROCHINA COMPANY 1,372
- LUBRIZOL CORPORATION US 1,324