Tag Archives: Naphthenic

Naphthenic acid and fuel oil producing process by using acid sludge as material

Application Number: 00110547Application Date: 2000.06.19Publication Number: 1277182Publication Date: 2000.12.20Priority Information: International: C07C57/00;C10L1/00Applicant(s) Name: Hu YueAddress: Inventor(s) Name: Hu Yue;Yuan Sai;Hu LingnaPatent Agency Code: 21207Patent Agent: li yutongAbstract Acid sludge is first mixed with alkali solution to depolymerize and dewater and then mixed with ethyl ether or petroleum ether to deoil; the mother liquor is mixed… Read More »

Preparation of naphthenic acid

Application Number: 00124066Application Date: 2000.08.25Publication Number: 1286249Publication Date: 2001.03.07Priority Information: 1999/8/27 EP 99116967.3International: C07D233/02Applicant(s) Name: F. Hoffmann-La Roche & Co. AGAddress: Inventor(s) Name: K. BellingerPatent Agency Code: 11038Patent Agent: li yingAbstract A process for the production of 2-oxo-1,3-dibenzyl-cis-4,5-imidazolidinedicarboxylic acid starting from meso-2,3-bis(benzylamino)-succinic acid dialkali metal salt is described. This process includes reacting meso-2,3-bis(benzylamino)-succinic acid dialkali… Read More »