Method for producing low-carbon olefin from animal and plant oil and waste animal and plant oil

• Main Authors: GUO YING, LIU TONGJU, WANG GUOQING, DU ZHIGUO
• Format: Patent
• Language: Chinese; English
• Published: 05.06.2013
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; CRACKING HYDROCARBON OILS; FUELS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LUBRICANTS; METALLURGY; MINERAL WAXES; ORGANIC CHEMISTRY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention discloses a method for producing a low-carbon olefin from animal and plant oil and waste animal and plant oil. The method comprises that animal and plant oil and waste animal and plant oil are subjected to hydrodeoxygenation and separation and then the products are used as cracking raw materials for production of low-carbon olefins. In the separation, hydrodeoxygenation products are cooled and then are subjected to gas-liquid separation to obtain a liquid-phase product which is a hydrocarbon mixture comprising C5-C28 n-alkanes and a gas-phase product which is propane. In the hydrodeoxygenation, a hydrogen-oil ratio is in a range of 50 to 5000; reaction pressure is in a range of 1 to 15MPa; a reaction temperature is in a range of 200 to 500 DEG C; and a space velocity is in a range of 0.5 to 5h<-1>. The method can remove oxygen and unsaturated bonds in the animal and plant oil and waste animal and plant oil, and realizes preparation of oil products having high n-alkane content and propane. The oi