2020 REFINING PROCESSES HANDBOOK PROCESS CATEGORIES COMPANY INDEX ETHERS TAME from refinery and steam cracker C5 feeds Application: The process combines skeletal isomerization and etherification steps to maximize the production of tertiary amyl methyl ether (TAME) from refinery and steam cracker C5 streams. Description: TAME is formed by the catalytic etherification of reactive isoamylenes with methanol via the CDTame® process. Skeletal isomerization increases TAME production from an olefinic C5 stream by converting normal amylenes to isoamylenes via the IsomPlus® process. The combination significantly reduces olefin content while also increasing octane value. The olefinic C5 stream is first sent to a selective hydrogenation step, where dienes are converted to olefins. Removal of dienes reduces color, odor and gum formation in the TAME product. The TAME product is produced in the CDTame unit, where 95% conversion of isoamylene is achieved. Raffinate 1 from this unit is fed to a skeletal isomerization unit (IsomPlus), where n-pentenes are converted to isoamylenes at high yield and selectivity. The vapor phase reaction takes place over a robust catalyst with long cycles between regenerations. The isomerate is then recycled to the CDTame unit where additional TAME is produced. Process advantages include: * Selective hydrogenation of di-olefins at minimum capital cost * High conversion of isoamylenes * High conversion of normal pentenes * High selectivity of isomerization * Improved gasoline feedstock due to reduced color, gum formation and olefin content * Increased TAME production * Increased gasoline pool octane * Decreased gasoline pool Rvp and olefins * Low capital and operating cost * High-quality TAME product without objectionable odor or color. TAME C5 olefin Hydrogen Selective hydrogenation and CDTAME C5 raffinate 1 Extract Fresh methanol Lights ISOMPLUS Optional recycle Isomerate C5 raffinate Recycle Methanol recovery Extract Methanol CDTAME Installations: With more than 35 years of experience, Lummus Technology has licensed more than 140 ethers units. Licensor: Lummus Technology Contact: Technology@lummustech.com Copyright © 2020 Gulf Energy Information. All rights reserved.http://www.hydrocarbonprocessing.com/