[LAUERMANN GERHARD] DE 1,177,099. #-Acylamino caproic acids. DEUTSCHES HYDRIERWERK RODLEBEN VEB. 20 Dec., 1967, No. 57945/67. Heading C2C. #-Acylamino caproic acids of general formula R-O-NH-(CH 2 ) 5 -COOH in which R is an aromatic group are prepared from caprolactam, #-aminocaproic acid and oligomeric and/or polymeric by-products and waste products, from the manufacture of polyamides with a caprolactam base, by decomposition of the starting materials in an aqueous alkali medium at a temperature between 100鈥� and 350鈥� C. for a time less than 500 minutes, the reaction product being acylated in a weakly alkaline medium. Preferably R is phenyl or p-nitrophenyl.

[BORGMANN WILFRIED, KUNKEL JOSEF, FRITZ HELMUT, LAUERMANN GERHARD, WALZL ROLAND, MUELLER KLAUS] US Processing of a product stream comprising ethylene, propylene, higher olefins and oxygenates involves dewatering, compression, scrubbing with methanol to remove oxygenates, drying and fractionation.

[Minquan Cheng, Jeffrey Phillips, Michael Nicoletti, David Lumgard Jr., John Shutt, Jeffrey Kabin, Wilfried Borgmann, Josef Kunkel, Helmut Fritz, Roland Walzi, Gerhard Lauermann, Klaus Muller] US IN Evansville This invention is directed to a method of removing dimethyl ether from an olefin stream. The method includes distilling the olefin stream so that the dimethyl ether is separated out of the olefin stream with propane. The olefin stream can then be further distilled to provide a polymer grade ethylene stream and a polymer grade propylene stream, with each stream containing not greater than about 10 wppm dimethyl ether.

[WALZL ROLAND, LAUERMANN GERHARD, FRITZ HELMUT, KUNKEL JOSEPH, BORGMANN WILFRIED, MULLER KLAUS] US

[Wilfried Borgmann, Josef Kunkel, Helmut Fritz, Gerhard Lauermann, Roland Walzl, Klaus Muller] DE Baierbrunn A method for processing an olefin-containing product stream that contains dimethyl ether as a by-product is described. Such a product stream arises, for example, in the synthesis of olefin from methanol. For separation of the dimethyl ether from the product stream, it is proposed that at least a partial stream chiefly containing C3 hydrocarbons is separated from the product stream by fractionation, and is sent to a rectification column (C3 splitter) (16) for separation of propylene and propane. The dimethyl ether goes together with the propane into the bottom of the rectification column in the rectification process and can be withdrawn (42). A substantially pure propylene product (41), which contains at most only traces of dimethyl ether, can be removed from the top of the rectification column.

[KOENIG EDGAR DIPL-CHEM DR, LAUERMANN GERHARD DIPL-CHEM DR, SEIFERT EKKEHARD DIPL-CHEM, WEIDEMANN REINHOLD DIPL-ING]

[CHENG, Minquan, PHILLIPS, Jeffrey, J., NICOLETTI, Michael, P., LUMGAIR, David, R., Jr., SHUTT, John, R., KABIN, Jeffrey, A., BORGMANN, Wilried, KUNKEL, Josef, FRITZ, Helmut, WALZL, Roland, LAUERMANN, Gerhard, MULLER, Klaus] 5200 Bayway Drive Baytown, TX 77520-2101;5505 Bent Fork Evansville, IN 47712;618 Knox Street Houston, TX 77007;4027 Roaring Rapids Drive Houston, TX 77059;33040 Boston Road Craddockville, VA 23341-0064;Eikestraat 111 B-3080 Tervuren;Apt. 2265 4400 Memorial Drive Houston, TX 77007;Fichtenstrafe 4 82065 Baierbrunn;Parkstrafe 19 82131 Gauting;Zillertalstrasse 31 81373 München;Am Buchenwald 2 82340 Feldafing;Gereinerstrasse 3 83646 Bad Tolz;Muncher Strasse 109 85614 Kirchseeon This invention is directed to a method of removing dimethyl ether from an olefin stream. The method includes distilling the olefin stream so that the dimethyl ether is separated out of the olefin stream with propane. The olefin stream can then be further distilled to provide a polymer grade ethylene stream and a polymer grade propylene stream, with each stream containing not greater than about 10 wppm dimethyl ether.

[LAUERMANN GERHARD]

[BORGMANN WILFRIED, KUNKEL JOSEF, FRITZ HELMUT, LAUERMANN GERHARD, WALZL ROLAND, MUELLER KLAUS] US Olefins are produced by heat exchanging methanol with hot olefin-containing reactor exit gas to at least partially vaporize the methanol and cool the exit gas; and contacting the mixed methanol stream with olefin-forming catalyst in a reactor to form the hot olefin-containing reactor exit gas. Production of olefins from methanol in a reactor comprises: (a) heat exchanging methanol with hot olefin-containing reactor exit gas to at least partially vaporize the methanol and cool the hot olefin-containing reactor exit gas; (b) depressurizing the at least partially vaporized methanol; (c) mixing the depressurized methanol with another methanol stream to form a mixed methanol stream; and (d) contacting the mixed methanol stream with olefin-forming catalyst in a reactor to form the hot olefin-containing reactor exit gas that is used to at least partially vaporize the methanol.

[BORGMANN WILFRIED DIPL -ING, KUNKEL JOSEF DIPL -ING, FRITZ HELMUT DIPL -ING, LAUERMANN GERHARD DR RER NAT, WALZL ROLAND DIPL -ING, MÜLLER KLAUS DIPL -PHYS] US