método para a manutenção da atividade catalìtica de uma peneira molecular sapo (silicoaluminofosfato) ativada

• Main Authors: MARCEL J. G. JANSSEN, WILFRIED J. MORTIER, SHUN C. FUNG, CORNELIUS W. M. VAN OORSCHOT, RONALD G. SEARLE, MACHTELD M. MERTENS, LUC R. M. MARTENS, STEPHEN N. VAUGHN
• Format: Patent
• Language: Portuguese
• Published: 23.08.2011
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; APPARATUS THEREFOR; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CRACKING HYDROCARBON OILS; FUELS; GENERAL METHODS OF ORGANIC CHEMISTRY; LUBRICANTS; METALLURGY; MINERAL WAXES; ORGANIC CHEMISTRY; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; 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; THEIR RELEVANT APPARATUS; TRANSPORTING

The present invention relates to a method of making an olefin product from an oxygenate feedstock, comprising providing a silicoaluminophosphate molecular sieve having a pores size of less than 5 angstroms and having catalytic sites protected by a shield, wherein the shield is selected from a carbonaceous material, an anhydrous gas or liquid; storing the molecular sieve in shielded form; removing the shield from the molecular sieve; and, after removing the shield, contacting the molecular sieve with an oxygenate feedstock at a temperature of from 200 DEG C to 700 DEG C to produce an olefin product, the molecular sieve contacting the oxygenate feedstock having a methanol uptake index of at least 0.15.