Patent ID: 8993820
Filing Date: 2015-03-31
Classification: C07C,Y02P

Abstract:
1. A process for producing an alkylated aromatic compound stream from an at least partially untreated alkylatable aromatic compound stream having catalyst poisons and an alkylating agent stream, wherein said alkylatable aromatic compound stream is treated to reduce catalyst poisons, the process comprising the steps of: (a) continuously feeding said untreated alkylatable aromatic compound stream having said catalyst poisons to a treatment zone having a treatment composition; (b) contacting said alkylatable aromatic compound stream having said catalyst poisons with said treatment composition in said treatment zone separate from an alkylation reaction zone under treatment conditions to remove at least a portion of said catalyst poisons and form a treated effluent stream which comprises treated alkylatable aromatic compound and a reduced amount of catalyst poisons, wherein said treatment composition has a surface area/surface volume ratio of greater than about 30 in (c) intermittently supplying a portion of said alkylating agent stream at intervals of 24 hours or more to said treatment zone along with said untreated alkylatable aromatic compound stream to produce a temperature increase in said treatment zone caused by an exothermic reaction between said alkylating agent stream and said alkylatable aromatic compound stream in the presence of said treatment composition under said treatment conditions and then interrupting the supply of said portion of said alkylating agent stream for periods of 15 days or more, whereby said temperature rise indicates the ageing of said treatment composition; and (d) contacting said treated alkylatable aromatic compound in said effluent stream and an additional portion of said alkylating agent stream with a catalyst composition in said alkylation reaction zone separate from said treatment zone under at least partial liquid phase catalytic conversion conditions to form an alkylated effluent stream which comprises additional alkylated aromatic compound, wherein said catalyst composition comprises a porous crystalline material having a framework structure type selected from the group consisting of FAU, BEA, MOR, MWW and mixtures thereof, wherein said at least partial liquid phase catalytic conversion conditions include a temperature of from about 100° C. to about 300° C., a pressure from about 689 kPa to about 4601 kPa, a molar ratio of treated alkylatable aromatic compound to alkylating agent of from about 0.01:1 to about 25:1, and a feed weight hourly space velocity (WHSV) based on alkylating agent of from about 0.5 to about 500 hr