Process for the regeneration of supported rhenium, molybdenum or tungsten-based catalysts containing organometallic promoters, useful in metathesis re-equilibration reactions of light olefins

• Main Authors: KRUGER TISSOT VIRGINIE, COMMEREUC DOMINIQUE, GUIBERT SEVERINE
• Format: Patent
• Language: English; French
• Published: 08.11.2002
• Edition: 7
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR RELEVANT APPARATUS; TRANSPORTING

Process of regeneration of metathesis catalysts comprising rhenium, molybdenum or tungsten compounds on a porous refractory oxide support and an organometallic promoter involves extraction of the promoter, calcination of the catalyst and re-impregnation with promoter. Process of regeneration of metathesis catalysts comprises rhenium, molybdenum or tungsten compounds on a porous refractory oxide support and an organometallic promoter. The promoter comprises an alkyl tin or lead compound of general formula, (R')4M. M = tin or lead; and R' = 1 - 40C aliphatic hydrocarbyl. The process comprises extraction of the promoter, calcination of the catalysts, and the treated and a re-impregnation stage of the catalyst by the tin or lead-containing promoter. An Independent claim is also included for the metathesis process of olefins. On décrit un procédé amélioré de régénération de catalyseurs de métathèse qui comprennent un composé de rhénium, de molybdène ou de tungstène sur un support poreux constitué par un oxyde réfractaire, ayant un caractère acide, neutre ou basique, et un promoteur organométallique constitué par un complexe alkyle de l'étain ou du plomb. La régénération comprend une extraction sélective du promoteur organométallique suivie par une calcination et une réimprégnation par le même promoteur.