C10H PRODUCTION OF ACETYLENE BY WET METHODS
Introduced: September 1968
Last revised: January 1990
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- Subclass:
- PRODUCTION OF ACETYLENE BY WET METHODS
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
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
Related Keywords
11 direct subcodes
Child Classifications
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- C10H 1/00 Acetylene gas generators with dropwise, gravity, non-automatic water feed
- C10H 11/00 Acetylene gas generators with submersion of the carbide in water
- C10H 13/00 Acetylene gas generators with combined dipping and drop-by-drop system
- C10H 15/00 Acetylene gas generators with carbide feed, with or without regulation by the gas pressure
- C10H 17/00 High-pressure acetylene gas generators
- C10H 19/00 Other acetylene gas generators
- C10H 21/00 Details of acetylene generators; Accessory equipment for, or features of, the wet production of acetylene
- C10H 3/00 Acetylene gas generators with automatic water feed regulation by means independent of the gas-holder
- C10H 5/00 Acetylene gas generators with automatic water feed regulation by the gas-holder
- C10H 7/00 Acetylene gas generators with water feed by Kipp's principle
- C10H 9/00 Acetylene gas generators according to Dobereiner's principle with fixed carbide bell
Top Applicants
Top 10 applicants by patent filingsfor 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