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:
Jun. 07, 2011
Filed:
Mar. 06, 2007
Tuat Pham Duc, Penzberg, DE;
Tuat Pham Duc, Penzberg, DE;
Linde Aktiengesellschaft, Wiesbaden, DE;
Abstract
To decrease capital costs of crack gas treatment of the olefin plant, a method for separation of olefins reduces the units for catalytic hydrogenation. In the method, olefins having three carbon atoms are separated from olefins having four carbon atoms. Crude gas is precompressed (), precooled and dried (), and passed into a C3/C4 separation stage () comprising a C4 absorber, operating at full crude gas pressure, and a depropanizer, operated at a pressure of 8 to 12 bar. In the C3/C4 separation stage, the olefins are separated into a fraction having at most three carbon atoms (C3−), and a fraction having at least four carbon atoms (C4+). The fraction having at most three carbon atoms is completely compressed () and passed to the catalytic hydrogenation (); the fraction having at least four carbon atoms is passed out for further processing (). The catalytic hydrogenation () yields a fraction having at least two carbon atoms (C2−), which is passed on to the low-temperature separation, and a fraction having three carbon atoms (C3), is passed to further processing ().