Integrated process for the production of ter-amyl alkyl ethers
AssigneesEnichem S.p.A., Snamprogetti S.p.A.
InventorsRoberto Trotta, Gianni Donati, Renato Paludetto, Paolo Chiudaroli
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Abstract
Integrated process for the production of ter-amyl alkyl ethers which comprises the feeding of a C.sub.5 hydrocarbon stream to an etherification reactor and the recycling of the remaining stream to the same reactor, after treatment in an isomerization section to convert linear pentenes into reactive isoamylenes. An absorption section on molecular sieves is inserted between the etherification reactor and the isomerization section to eliminate inert hydrocarbons, basically i-pentane and n-pentane.
Claims15
Integrated process for the production of ter-amyl alkyl ethers which comprises:
- a) feeding a C.sub.5 hydrocarbon stream, basically consisting of 2-methyl-1-butene and/or 2-methyl-2-butene (reactive isoamylenes), linear pentenes, 3-methyl-1-butene and pentanes to a synthesis section of ter-amyl alkyl ethers together with a stream consisting of an aliphatic alcohol;
- b) separating the ether produced and the possible non-reacted alcohol from the hydrocarbon stream;
- c) sending the remaining hydrocarbon stream, in vapour phase, or a fraction thereof, to a separation section with molecular sieves for the separation of the pentanes from the pentenes and recovery of the pentenes;
- d) sending the hydrocarbon stream containing the recovered pentenes, together with the possible non-fed fraction in step (c), to a skeleton isomerization section for the transformation of the linear pentenes to reactive isoamylenes;
- e) recycling the isomerized stream to the synthesis reactor of the ter-amyl alkyl ether after mixing with the charge C.sub.5 hydrocarbon stream.
Integrated process for the production of ter-amyl alkyl ethers which comprises:
- a) feeding a C.sub.5 hydrocarbon stream, basically consisting of 2-methyl-1-butene and/or 2-methyl-2-butene (reactive isoamylenes), linear pentenes, 3-methyl-1-butene and pentanes to a synthesis section of ter-amyl alkyl ethers together with a stream consisting of an aliphatic alcohol;
- b) separating the ether produced and the possible non-reacted alcohol from the hydrocarbon stream;
- c) sending the remaining hydrocarbon stream to a structural skeleton isomerization section of the linear pentenes to transform the linear pentenes to reactive isoamylenes;
- d) sending the isomerized hydrocarbon stream leaving step (c), in the vapour phase, or a fraction thereof, to a molecular sieve separation section for the separation of the pentanes from the pentenes and the recovery of the pentenes;
- e) recycling the isomerized stream, containing the recovered pentenes, together with the possible fraction not fed in step (d), to the synthesis reactor of the ter-amyl alkyl ether after mixing with the charge C.sub.5 hydrocarbon stream.
Dependencies are inferred from the claim text.