Process for the production of jet-range hydrocarbons by oligomerization of renewable olefins having 3 to 8 carbons

Patent metadata

Field	Value
Publication number	US-9957449-B2
Application number	US-201514695352-A
Country	US
Kind code	B2
Filing date	Apr 24, 2015
Priority date	Apr 24, 2015
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

Processes for producing jet-range hydrocarbons includes splitting a renewable olefin feedstock comprising C 3 to C 8 olefins into a plurality of streams and passing each stream to an oligomerization reactor containing a zeolite catalyst to produce an oligomerized effluent. The reactors may be arranged in series, such that an oligomerized effluent comprises a diluent for a downstream reactor. The net oligomerized effluent may be separated and a heavy olefin stream comprising C 8+ olefins may be hydrogenated and separated to provide a distillate range hydrocarbon product.

First claim

What is claimed is:

1. A process for producing distillate range hydrocarbons comprising:
splitting a renewable olefin feedstock comprising C 3 to C 8 olefins into at least a first olefin feedstock stream and a second olefin feedstock stream wherein the first olefin feedstock stream and the second olefin feedstock stream comprise different mass flow amounts;
diluting the first olefin feedstock stream to provide a diluted first olefin feedstock stream;
oligomerizing the diluted first olefin feedstock stream in a first oligomerization reactor containing a first non-selectivated MTT zeolite catalyst extrudate and being operated under conditions comprising a temperature of from 160 to 260° C. to produce a first oligomerized effluent;
diluting the second olefin feedstock stream with the first oligomerized effluent to provide a diluted second olefin feedstock stream;
oligomerizing the diluted second olefin feedstock stream in a second oligomerization reactor containing a second non-selectivated MTT zeolite catalyst extrudate and being operated under conditions comprising a temperature of from 160 to 260° C. to produce a second oligomerized effluent; and
separating distillate range olefins from the second oligomerized effluent.

2. The process of claim 1 further comprising:
diluting the first olefin feedstock stream with a saturated hydrocarbon to provide the diluted first olefin feedstock stream.

3. The process of claim 1 further comprising:
hydrogenating a fraction of the distillate range olefins comprising C 8 + olefins to provide a distillate range stream.

4. The process of claim 1 further comprising:
splitting the renewable olefin feedstock into at least the first olefin feedstock stream, the second olefin feedstock stream, and a third olefin feedstock stream wherein the first olefin feedstock stream, the second olefin feedstock stream, and the third olefin feedstock stream comprise different mass flow amounts;
diluting the third olefin feedstock stream with the second oligomerized effluent to provide a diluted third olefin feedstock stream; and
oligomerizing the diluted third olefin feedstock stream in a third oligomerization reactor containing a third non-selectivated MTT zeolite catalyst extrudate and being operated under conditions comprising a temperature of from 160 to 260° C. to produce a third oligomerized effluent.

5. A process for producing distillate range hydrocarbons comprising:
splitting a renewable olefin feedstock comprising C 3 to C 8 olefins into at least a first olefin feedstock stream and a second olefin feedstock stream wherein the first olefin feedstock stream and the second olefin feedstock stream comprise different mass flow amounts;
diluting the first olefin feedstock stream to provide a diluted first olefin feedstock stream;
passing the diluted first olefin feedstock stream to a first oligomerization reactor containing a non-selectivated MTT zeolite catalyst extrudate and being operated under conditions comprising a temperature of from 160 to 260° C. to produce a first oligomerized effluent;
diluting the second olefin feedstock stream with the first oligomerized effluent to provide a diluted second olefin feedstock stream;
passing the diluted second olefin feedstock stream to a second oligomerization reactor containing the non-selectivated MTT zeolite catalyst extrudate and being operated under conditions comprising a temperature of from 160 to 260° C. to produce a second oligomerized effluent; and
hydrogenating at least a portion of the second oligomerized effluent in a hydrogenation zone to provide a jet range fuel stream.

6. The process of claim 5 further comprising:
splitting a third olefin feedstock stream from the renewable olefin feedstock wherein the first olefin feedstock stream, the second olefin feedstock stream, and the third olefin feedstock stream comprise different amounts;
diluting the third olefin feedstock stream; and
passing the diluted third olefin feedstock stream to a third oligomerization reactor containing a third non-selectivated MTT zeolite catalyst and being operated under conditions comprising a temperature of from 160 to 260° C. to produce a third oligomerized effluent.

7. The process of claim 6 further comprising:
passing the third oligomerized effluent to a separation zone configured to separate the third oligomerized effluent into at least a distillate range olefin stream; and,
passing the distillate range olefin stream to the hydrogenation zone.

8. The process of claim 6 wherein the mass of the third olefin feedstock stream is greater than the mass of the second olefin feedstock stream.

9. The process of claim 8 wherein the mass of the second olefin feedstock stream is greater than the mass of the first olefin feedstock stream.

10. The process of claim 5 wherein the renewable olefin feedstock stream comprises substantially C 4 olefins.

11. The process of claim 5 further comprising:
cooling the renewable olefin feedstock stream, the first olefin feedstock stream, or the second olefin feedstock stream in a cooling zone.

Assignees

• Uop Llc

Inventors

• Luebke Charles P
• Fichtl Geoffrey W
• Sullivan Dana K

Classifications

• C07C2/06

  of alkenes, i.e. acyclic hydrocarbons having only one carbon-to-carbon double bond · CPC title

• C10G69/126

  polymerisation, e.g. oligomerisation · CPC title

• C07C2/08

  Catalytic processes · CPC title

• C10G2400/08

  Jet fuel · CPC title

• C10L2270/04

  for turbines, planes, power generation · CPC title