The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 08, 1998
Filed:
Jan. 30, 1996
Linde Aktiengesellschaft, Wiesbaden, DE;
Abstract
For recovering acetylene from hydrocarbons, the hydrocarbons are thermally cracked in the presence of CO.sub.2 as a diluent gas. Suitable for thermal cracking for acetylene generation is a ratio, by weight, of CO.sub.2 to hydrocarbon, of between 3:1 and 1:3, and preferably between 2:1 and 1:2. It is preferred for the CO.sub.2 to be mixed with the hydrocarbons before thermal cracking which is thereafter conducted at average reaction temperatures of between 800.degree. and 1200.degree. C., preferably between 900.degree. and 1100.degree. C. An average residence time of between 5 and 500 milliseconds (ms) of the hydrocarbons during thermal cracking has proven to be effective. As the hydrocarbon feedstock for the thermal cracking, basically C.sub.2+ alkanes, especially ethane, propane and/or butane, can be used advantageously. After the cracked gas is cooled, higher alkynes are removed from the cracked gas, then the acetylene is separated preferably by scrubbing with an absorption agent selective for acetylene. Recycle streams of hydrocarbons and/or CO.sub.2 for the thermal cracking can contribute to savings and more efficient use of the feedstock.