Abstract:
1,174,278. Acetylene. BADISCHE ANILIN- & SODA-FABRIK A.G. 21 April, 1967 [22 April, 1966], No. 18429/67. Heading C5E. Acetylene is produced by incomplete combustion of gaseous or vaporized hydrocarbons (e.g. light naphtha) with oxygen, with subsequent quenching, the reaction being carried out in the presence of CO 2 which is added continuously to the hydrocarbon feed, the oxygen or the mixture thereof prior to the reaction in an amount of 10-50 vol. per cent with reference to the oxygen amount. Carbon black formation is reduced and acetylene yield increased.
Abstract:
Acetylene is produced by the incomplete combustion of hydrocarbons with oxygen in a flame reactor wherein the reactants after mixing are passed into the reactor through a gas distributer comprising a plurality of parallel tubes or channels containing inserts (C in the Figure), which offer resistance to the gas flow at the gas inlet end of the tubes. The inserts have a sharp edge at the lower end as shown, and decrease the cross-sectional areas of the tubes to 30-90% of the total. Inserts of different internal diameter may be used for different gas flow rates.
Abstract:
In the pyrolysis, partial oxidation or electric arc cracking of hydrocarbons to form an acetylene-containing gas, the product gas is quenched with a liquid consisting of naphthalene and carbon black and optionally aromatic hydrocarbons introduced into the gas through a nozzle comprising a hollow cylinder open at one end and into which the quenching liquid is introduced tangentially. Preferably the pressure in the nozzle is one-tenth to one-half the pressure of the liquid entering the nozzle. Additional carbon-containing naphthalene may be injected through conical jets. The temperature of the quench fluid is preferably 160-250 DEG C. and it may contain 20-40% weight of carbon black.
Abstract:
In the production of acetylene from hydrocarbons by partial combustion, quenching and separating carbon black from the gas by contacting with an aromatic hydrocarbon oil, naphthalene or an a -halonaphthalene is used as the aromatic hydrocarbon oil. A portion of the naphthalene containing carbon black may be freed from carbon black and may be recycled alone or in admixture with naphthalene containing carbon black. The carbon content of the recycle naphthalene is preferably 10 to 30% by weight and naphthalene vapours entrained in the quenched gas are condensed by aromatic hydrocarbon oils having a boiling point of 80 DEG to 170 DEG C. and a specific gravity less than 0.95 which oils are preferably free from polymerizable constituents. The heat transmitted to the naphthalene may be used to preheat the hydrocarbons to be reacted, or to produce steam.
Abstract:
In the production of acetylene by subjecting hydrocarbons to high temperatures, the hot gas is quenched in a single stage by injecting a hydrocarbon oil boiling above 150 DEG C. in a volume ratio to gas (measured under standard conditions) of at least 1 : 100 without any appreciable cracking of the oil and separating the hot oil containing carbon black from the gas. The oil is preferably an aromatic oil and useful heat is extracted from it before its reuse; the carbon black content is preferably reduced to below 35% by weight e.g. by removing part of the oil and replacing this by fresh oil. The gas is preferably also later washed with an oil boiling in the range 80-450 DEG C. having a specific gravity below 0.95. The examples relate to the partial combustion of gasoline and of methane; reference is also made to heating hydrocarbons by electric discharge and exposure to hot flame gases. Specification 893,504 is referred to.