Isp Investments Inc.

Huels Aktiengesellschaft

Bergwerksverband Gmbh

Isp Marl Gmbh

Cornelius Peuckert

Harald Juntgen

Jurgen Klein

Klaus Koester

Richard Mueller

Herbert Baumann

Lothar Kerker

Christian Lambernd

Ulrich Niggemeyer

Dirk Bittner

Ulrich Niggenmeyer

Klaus Köster

A process for purification of an aromatic fraction containing acetylenes as impurities by selective hydrogenation of the acetylenes by means of a catalyst containing nickel or palladium at a temperature of not more than about 60&#xb0; C. is described.

Purification of an aromatic fraction containing acetylenes by selective hydrogenation of the acetylenes

For the manufacture of acetylene and synthesis or reduction gas from coal by means of an electric arc or plasma process, coal converted into powder form is pyrolyzed in an electric arc reactor with an energy density of 1 to 5 kWh/Nm.sup.3, a residence period of 0.5 to 10 msec and at a temperature of at least 1500.degree. C. such that the gaseous compounds derived from the coal do not exceed 1.8 times the so-called volatile content of the coal. The coke remaining after subsequent quenching is then fed to a second electric arc reactor in which the coke, by means of a gasifying medium in conjunction with heating by means of an electric arc or plasma process, is converted into synthesis or reduction gas furing a residence period of 1 to 15 sec and at a temperature of at least 800.degree. C. The gas flow from the pyrolysis zone is cleaned and acetylene is recovered therefrom by selective solvents. The gas from the cleaning stage is similarly cooled and cleaned.

Process for the production of acetylene and synthesis or reduction gas

A method for the production of acetylene from coal and hydrogen is provided by electric arc heating. The coal has a content of volatile components (i.waf) from about 25 to 44 percent and a content of organic oxygen (i.waf) of less than 9 percent and is ground to a diameter of less than 0.5 mm. The coal is then separated into two to four grain size fractions and one of the grain size fractions is loaded on a hydrogen containing gas. The gas carrying the coal is heated by way of an electric arc with an energy of from about 5 to 20 kJ/l (in normal state). The ratio of electric power employed to coal stream is from about 4,000 to 40,000 kJ/kg coal. The coal is heated for a time duration about inversely proportional to the third root of the specific outer surface of the coal gain fraction. The resulting product gas is quenched with cold liquid hydrocarbons, with hydrogen or water. Acetylene yields of up to about 0.41 kg acetylene per kg coal can be obtained.

Method for production of acetylene

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Dinslaken, Germany

Cornelius Peuckert