Verfahren zur Acylation oder Alkylierung von aromatischen Verbindungen in Wasserstofffluoriden

• Main Authors: CURTIS, THOMAS A., TEGA CAY, SOUTH CAROLINA 29715, US, LINDLEY, DANIEL D., PORTLAND, TEXAS 78374, US, RYAN, TIMOTHY R., CORPUS CHRISTI, TEXAS 78413, US, DE LA GARZA, EDWARD M., CORPUS CHRISTI, TEXAS 78412, US, HILTON, CHARLES B., NORTH KINGSTOWN, RHODE ISLAND 02852, US, KENESSON, THOMAS M., CORPUS CHRISTI, TEXAS 78408, US
• Format: Patent
• Language: German
• Published: 31.10.1996
• Edition: 6
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; APPARATUS THEREFOR; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; GENERAL METHODS OF ORGANIC CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

A continuous process is disclosed for the acylation or alkylation of aromatic compounds in hydrogen fluoride. The aromatic compound is sufficiently insoluble in hydrogen fluoride that a two phase reaction medium forms. However, surprisingly, the product acylated or alkylated aromatic compound is soluble in hydrogen fluoride. The present invention particularly relates to use of a continuous, multi-stage process for carrying out the acylation or alkylation reaction. In the multi-stage process, the continuous phase can be either the hydrogen-fluoride rich phase or the aromatic compound-rich phase. The movement of the continuous phase relative to the non-continuous (dispersed) phase can be countercurrent or concurrent. The multi-stage process can be operated in a manner such that the aromatic compound feed to the reaction is entirely consumed or such that unreacted aromatic compound is recycled.