WO2016182234A1 - 이성질화 반응을 이용한 노말부텐의 분리방법 및 노말부텐을 분리하기 위한 공정시스템 - Google Patents
이성질화 반응을 이용한 노말부텐의 분리방법 및 노말부텐을 분리하기 위한 공정시스템 Download PDFInfo
- Publication number
- WO2016182234A1 WO2016182234A1 PCT/KR2016/004459 KR2016004459W WO2016182234A1 WO 2016182234 A1 WO2016182234 A1 WO 2016182234A1 KR 2016004459 W KR2016004459 W KR 2016004459W WO 2016182234 A1 WO2016182234 A1 WO 2016182234A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fraction
- butene
- olefin
- recovering
- distillation column
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/005—Processes comprising at least two steps in series
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
- C07C5/22—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by isomerisation
- C07C5/23—Rearrangement of carbon-to-carbon unsaturated bonds
- C07C5/25—Migration of carbon-to-carbon double bonds
- C07C5/2506—Catalytic processes
- C07C5/2556—Catalytic processes with metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/007—Energy recuperation; Heat pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/009—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in combination with chemical reactions
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/04—Purification; Separation; Use of additives by distillation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
- Y02P30/40—Ethylene production
Definitions
- the present invention relates to a separation process for easy recovery of normal butenes from olefinic fractions comprising isobutene, isobutane, 1-butene, 2-butene and normal butane and a separation process system for separating normal butenes.
- 1-butene has a demand growth rate of 3-4% annually, and is used as a monomer for copolymerization of high densicy polyethylene (HDPE) or linear low density polyethylene (LLDPE). Recently, the price has risen due to supply-demand imbalance of 1-butene due to higher naphtha price and lower utilization rate of naphtha cracking process.
- HDPE high densicy polyethylene
- LLDPE linear low density polyethylene
- the C4 residue from the naphtha cracking process usually consists of butadiene, isobutene, 1-butene, 2-butene, normal butane, and isobutane, and the fraction of butadiene separated from the C4 residue is converted to C4 residue oil I (isobutene, 1-butene, 2-butyne, butane, isobutane mixture).
- C4 residue oil I isobutene, 1-butene, 2-butyne, butane, isobutane mixture
- isobutene is reacted with methanol to produce methyl tertiary butyl ether (MTBE), and the separated oil is referred to as C4 residue oil II (1-butene, 2-butene, butane, isobutane mixture).
- C4 residue oil 2.5 the fraction in which the trace amount of butadiene was removed by introducing C4 residue II into the selective hydrogenation reactor was referred to as C4 residue 2.5.
- 1-butene is made by separating isobutane from the C4 residue oil 2.5 and introducing the remaining oil to the distillation column to obtain 1-butene having a purity of 99% or more as a column top, and the bottom of 1-butene C4 residue oil III is obtained, which is a mixture of 2-butene and normal butane.
- C4 residue oil III is produced in LPG through hydrogenation with the tower oil of the isobutane distillation column.
- C4 residue oil III is used to prepare MEK (methyl ethyl ketone) after the separation of olefins and paraffins to concentrate 98 wt% or more, or 1,3-butadiene with oxidative dehydrogenation.
- 1-butene and 2-butene may be used to produce propylene through an interchange reaction, or may be used to produce ethylene and hexene through an interchange reaction.
- C4 residue II and C4 residue III it is necessary to recover 1-butene and 2-butene as much as possible from the residue (C4 residue II and C4 residue III), but within the residue
- the boiling points of isobutene and 1-butene contained are so similar that it is impossible to separate them by distillation unless a great deal of means is used.
- many studies have been conducted in relation to the separation process of isobutene and 1-butene, and as a representative example, a method using isomerization of 1-butene and 2-butene has been introduced.
- the conventional separation process is an isomerization reactor (R1), a distillation column (S1), a condenser (C1), a reflux drum (D1), and a pump ( Separation was performed through a process system including P1) and reboiler (B1).
- R1 isomerization reactor
- S1 distillation column
- C1 condenser
- D1 reflux drum
- B1 reboiler
- an olefinic fraction comprising isobutene, 1-butene, 2-butene and the like is fed to the isomerization reactor (R1) via reactant feed line (F1) to convert some of the 1-butene to 2-butene
- F1 reactant feed line
- the reaction product is fed to the distillation column (S1) through the oil fraction transfer line (L1).
- the supplied reaction product is separated in the distillation column (S1) and the upper fraction containing isobutene is transferred to the condenser (C1) through the top discharge line (L2) and condensed, and then refluxed through the reflux line (D3) (D1). Inflow).
- the liquid phase of the upper fraction in the reflux drum (D1) is reintroduced to the distillation column (S1) through the reflux line 5 (L4), the gas phase is discharged through the recovery line (L5).
- Patent Document 1 JP2000-0029848 A
- the present invention has been made to solve the problems of the prior art, consisting of 1-butene and 2-butene from an olefin-based fraction comprising isobutene, isobutane, 1-butene, 2-butene and normal butane It is an object to provide a separation method for easily recovering normal butenes.
- Another object of the present invention is to provide a separation process system for easily recovering normal butenes from olefinic fractions.
- the present invention comprises the steps of introducing an olefin-based fraction in a distillation column equipped with at least one isomerization reaction zone (step 1); Recovering an upper fraction comprising isobutene and isobutane from the top of the distillation column, and recovering a lower fraction comprising normal butene from the bottom of the distillation column (step 2); Compressing at least a portion of the upper fraction to heat exchange with at least a portion of the lower fraction (step 3); And reintroducing at least a portion of the heat exchanged upper fraction and at least a portion of the lower fraction into the upper and lower portions of the distillation column (step 4), respectively.
- the present invention is a supply unit for supplying a reactant containing an olefin-based oil;
- a treatment unit connected to the supply unit and having a distillation column having at least one isomerization reaction zone; And a recovery part connected to the treatment part and recovering a reaction product, wherein the distillation column of the treatment part includes a top discharge line and a bottom discharge line, and the recovery part includes an upper fraction recovery part and a bottom discharge line connected to the top discharge line.
- a separation process system for recovering normal butenes from olefinic fractions comprising linked bottom fraction recovery is provided.
- Separation method for separating normal butene from the olefin-based oil can easily convert 1-butene contained in the olefin-based oil to 2-butene can be effectively separated and recovered normal butene through fractional distillation. By reducing or eliminating the use of a reflux system using a refrigerant, etc., each recovered fraction can be easily refluxed, thereby improving economic efficiency and increasing separation efficiency.
- Figure 1 schematically shows a process system for separating normal butenes from a conventional general olefin fraction.
- Figure 2 schematically shows a separation process system for separating normal butenes from olefinic fractions according to one embodiment of the present invention.
- the present invention provides a separation method for recovering normal butene from an olefin-based fraction which can maximize the recovery rate of normal butene while reducing the economic cost.
- normal butenes (1-butene and 2-butene) can be used for the production of propylene or for the production of ethylene and hexene, in particular 1-butene as the monomer for the copolymerization of HDPE or LLDPE.
- Such normal butene can be recovered from the C4 residue oil obtained from the naphtha decomposition process and the like.
- the C4 residue oil contains isobutene, isobutane, etc.
- the present invention converts 1-butene to 2-butene in an olefin-based fraction containing isobutene, isobutane, 1-butene and 2-butene using a distillation column equipped with an isomerization reaction zone, and simultaneously fractionates
- a distillation column equipped with an isomerization reaction zone equipped with an isomerization reaction zone, and simultaneously fractionates
- a separation method that can easily recover normal butene from the fraction by distillation.
- the separation method comprises the steps of introducing an olefin-based fraction in a distillation column equipped with at least one isomerization reaction zone (step 1); Recovering an upper fraction comprising isobutene and isobutane from the top of the distillation column, and recovering a lower fraction comprising normal butene from the bottom of the distillation column (step 2); Compressing at least a portion of the upper fraction to heat exchange with at least a portion of the lower fraction (step 3); And reintroducing at least a portion of the heat exchanged top fraction and at least a portion of the bottom fraction into the top and bottom of the distillation column, respectively (step 4).
- the separation method for recovering the normal butene may be a manufacturing method of the normal butene, wherein the normal butene may include some 1-butene, but 2-butene may be the main component.
- Step 1 is to facilitate separation of isobutene by converting 1-butene contained in the olefinic fraction into 2-butene and fractional distillation, and distillation tower having an isomerization reaction zone of the olefinic fraction. Introducing to.
- the olefin-based fraction may be one containing isobutene, isobutane, 1-butene, 2-butene and normal butane.
- the olefin-based fraction may be a C4 residue oil obtained from a naphtha decomposition process, C4 residue oil I, C4 residue oil II, C4 residue oil 2.5, C4 residue oil III or these from which butadiene is removed from the C4 residue oil. It can be a combination of.
- the olefin-based oil may include less than 60% by weight of butadiene relative to the total weight of the oil, the content of 1-butene in the olefin-based oil may be 1% to 500% by weight compared to 2-butene. have.
- the isomerization reaction region may be a region for converting at least a portion of 1-butene in the olefin-based fraction to 2-butene.
- the isomerization reaction region may be a region where a selective position isomerization reaction occurs, and the selective position isomerization reaction means an isomerization reaction where regioselective conversion of one isomer into another isomer occurs. It may be. That is, the isomerization reaction region according to the present invention may be a region in which at least a part of 1-butene is converted to 2-butene through a selective position isomerization reaction.
- the term “at least a portion” means at least a portion or more, for example, at least a portion of 1-butene may represent a portion of 1-butene, at least a portion of 1-butene or all of 1-butene. .
- the isomerization reaction zone according to an embodiment of the present invention may be provided with an isomerization reaction catalyst, and the isomerization reaction catalyst may be used without particular limitation as long as it is known in the art, for example, ruthenium (Ru ), Rhodium (Rh), palladium (Pd), osmium (Os), iridium (Ir), platinum (Pt), nickel (Ni), tungsten (W), titanium (Ti), aluminum (Al), tantalum ( It may be at least one metal selected from the group consisting of Ta), niobium (Nb), molybdenum (Mo), vanadium (V), rhenium (Re), and gallium (Ga).
- the catalyst can be used using the metal itself or attached to a separate support.
- the support is one or more selected from the group consisting of alumina, silica-alumina, silica, zeolite, activated carbon, clay, alumina based cementite, rare earth metal oxide and alkaline earth metal oxide Can be.
- the catalyst may be purchased and used in the art, or may be manufactured and used. Examples of commercially available catalysts include E-144 SDU (BASF), E-445 SDU (BASF), and the like.
- the distillation column according to an embodiment of the present invention is provided with an isomerization reaction zone therein, and has an isomerization reaction zone and a distillation zone at the same time. That is, the isomerization reaction and fractional distillation may occur simultaneously in the same physical space, and the catalyst provided in the isomerization reaction zone is not only in contact with the olefin-based oil introduced before the isomerization reaction, but also reintroduced into the upper part of the distillation column. It may also be in contact with at least a portion of the upper fraction and in contact with at least a portion of the lower fraction which is reintroduced to the bottom of the column.
- the isomerization reaction zone may be located at the middle point of the distillation column for smooth circulation of reactants (eg, olefin-based fraction, reintroduced upper fraction and lower fraction) in the distillation column, and specifically, the total height of the distillation column may be increased. It can be located at a point higher than the middle point as a reference. More specifically, the isomerization reaction zone may be located at the top 5% to 50% of the distillation column based on the total height of the distillation column.
- reactants eg, olefin-based fraction, reintroduced upper fraction and lower fraction
- reaction conditions in the isomerization reaction zone may be associated with fractional distillation conditions in the distillation zone.
- the pressure of the entire distillation column may be fixed the same and the temperature conditions may be different for each region.
- the distillation zone of the top of the distillation column may have a temperature condition of 0 °C to 190 °C under a pressure condition of 0.001 kgf / cm 2 to 20 kgf / cm 2
- the isomerization reaction zone is 0.001 kgf / cm 2 to It may be one having a temperature condition of 5 °C to 200 °C under a pressure condition of 20 kgf / cm 2 .
- the activity of the catalyst may be lowered so that the isomerization reaction may not occur smoothly. This may not be switched enough.
- the separation method according to an embodiment of the present invention may include the step of introducing hydrogen to the distillation column as necessary before performing the isomerization reaction in step 1).
- the separation method may further include separating hydrogen from the recovered upper fraction, and the separated hydrogen may be reused.
- Step 2 is a step for recovering the upper fraction and the lower fraction separated through a distillation column equipped with the isomerization reaction zone.
- the top fraction may comprise isobutene and isobutane and may be recovered from the top of the distillation column.
- the upper fraction may include some unreacted 1-butene in addition to isobutene and isobutane, the content of unreacted 1-butene included in the upper fraction is 0 compared to the total flow rate (kg / hr) of the upper fraction % To 10%.
- the unreacted 1-butene may be reintroduced into the distillation column through steps 3 and 4 described below.
- the bottom fraction may comprise normal butenes and may be recovered from the bottom of the distillation column.
- the normal butene may include some 1-butene, and the main component may be 2-butene.
- the content of 1-butene in the bottom fraction recovered from the bottom may be 0% to 5% relative to the bottom fraction total flow rate (kg / hr).
- the lower fraction may include some isobutene and isobutane in addition to the normal butene, the content of isobutene and isobutane contained in the lower fraction is 0% to 5% relative to the total flow rate of the lower fraction (kg / hg) It may be.
- Step 3 is a step of condensing at least a portion of the upper fraction and vaporizing at least a portion of the lower fraction to reintroduce at least a portion of each of the upper and lower fractions recovered in step 2 to the distillation column.
- step 4 is to re-introduce at least a portion of the upper fraction condensed through the step 3 and at least a portion of the vaporized lower fraction to the top and the bottom of the distillation column, respectively, to rejoin the reaction.
- the upper fraction recovered from the top may include a portion of unreacted 1-butene
- the lower fraction recovered from the bottom may include some isobutene and isobutane. Therefore, there is a need to reduce the 1-butene consumed by reintroducing the unreacted 1-butene contained in the upper fraction, and isobutene and isobutane in the lower fraction by reintroducing isobutene and isobutane included in the lower fraction. It is necessary to increase the purity of normal butene in the lower fraction by reducing the content of.
- the upper fraction condenses the upper fraction recovered through a condenser using a refrigerant, etc., and is reintroduced back into the distillation column, and the lower fraction is vaporized by heating the lower fraction recovered through the reboiler.
- Re-introduction into the distillation column was used (see FIG. 1).
- a large amount of refrigerant is required for the condensation, the price of the refrigerant is expensive, and there is a problem of inferior economics, and re-boiling also has a problem of high cost to provide high heat.
- the method through step 3 can perform a process for achieving the above object without using a separate condenser and reboiler, thereby reducing the economic cost.
- Step 3 may be performed by compressing at least a portion of the recovered upper fraction and exchanging heat with at least a portion of the lower fraction. That is, the heat exchange according to an embodiment of the present invention may be performed by a difference between a temperature of at least a portion of the upper fraction and a temperature of at least a portion of the lower fraction, and at least a portion and a lower portion of the upper fraction before the heat exchange. At least a portion of the fraction may be one having a temperature difference of 5 ° C to 200 ° C.
- At least a portion of the upper fraction before the heat exchange may be one having a temperature of 0 °C to 400 °C.
- at least a part of the upper fraction before heat exchange may be a compression process through a compressor.
- at least a portion of the upper fraction may be subjected to a step of supplying heat to prevent condensation before it is compressed.
- the heat may be supplied by a conventional method known in the art, for example, a heat exchanger may be used.
- At least a portion of the lower fraction before heat exchange may be one having a temperature of 5 °C to 200 °C.
- At least a portion of the top fraction may be condensed through the heat exchange and at least a portion of the condensed top fraction may be reintroduced to the top of the distillation column as reflux.
- the re-introduction ratio (reflux ratio) of at least a portion of the upper fraction reintroduced into the distillation column may be 50% to 99% of the total fraction flow rate (kg / hr).
- the bottom fraction may be heated to vaporize through the heat exchange and at least a portion of the vaporized bottom fraction may be reintroduced to the bottom of the distillation column as reflux.
- the reintroduction ratio (reflux ratio) of at least a portion of the lower fraction reintroduced into the distillation column may be 50% to 99% of the total flow rate of the lower fraction (kg / hr).
- the separation method converts 1-butene to 2-butene using a distillation column equipped with an isomerization reaction zone and performs fractional distillation at the same time, thereby isobutene without using a separate isomerization reactor.
- 1-butene can be easily separated, and at least part of the upper fraction can be condensed through heat exchange using the temperature difference between the recovered upper fraction and the lower fraction, and at least part of the lower fraction can be reintroduced into the distillation column. have.
- the process can be simplified and the economic efficiency can be increased.
- the recovered bottom fraction may separate 1-butene and 2-butene through separate isomerization reaction and fractional distillation.
- the isomerization reaction and fractional distillation method can be carried out by conventional methods known in the art.
- the recovered bottom fraction is introduced into a distillation column equipped with an isomerization reaction zone to convert a part of 2-butene in the bottom fraction into 1-butene and fractional distillation to recover 1-butene from the column top and 2-butene from the bottom.
- the isomerization reaction zone may be provided with a catalyst capable of regioselectively converting 2-butene to 1-butene.
- the present invention also provides a separation process system for recovering normal butenes from olefinic fractions.
- the separation process system can be used to perform the separation process through the above separation method.
- the separation process system is a supply unit for supplying a reactant containing an olefin-based oil;
- a treatment unit connected to the supply unit and having a distillation column having at least one isomerization reaction zone; And a recovery part connected to the treatment part and recovering a reaction product, wherein the distillation column of the treatment part includes a top discharge line and a bottom discharge line, and the recovery part includes an upper fraction recovery part and a bottom discharge line connected to the top discharge line. And a connected lower fraction recovery part.
- the supply unit may include a supply line 10 connected to the treatment unit and supplying a reactant including an olefin-based oil to the treatment unit.
- the supply line may be connected to a stream in which the C4 residue oil is recovered in a naphtha cracking process.
- the supply unit may further include a storage tank, if necessary, the storage tank is disposed in the middle of the feed line and the stream in which the C4 residue is recovered in the debris decomposition process to control the flow rate of the reactant supplied to the treatment unit Can be.
- the reactant including the olefin-based oil fed through the supply line may include isobutene, isobutane, 1-butene, 2-butene and normal butane.
- the olefin-based fraction may be as described above, and may be, for example, C4 residue oil obtained from a naphtha decomposition process, C4 residue oil I, C4 residue oil II, C4 residue oil from which butadiene is removed from the C4 residue oil. 2.5, C4 residue III or a combination thereof.
- the supply unit may further include a hydrogen supply line for supplying hydrogen to the processing unit.
- the treatment unit may include a distillation column 30 having an isomerization reaction zone 31, and the distillation column 30 may be connected to a supply line 10 to which a reactant is supplied.
- the supply line 10 may be connected to an intermediate point in the height direction of the distillation column 30, or may be connected to a point where an isomerization reaction region 31 is provided.
- the isomerization reaction region 31 may be a region where a selective isomerization reaction for converting at least a part of 1-butene into 2-butene in the reactant introduced through the supply line 10 is performed. 31 may be provided with an isomerization catalyst. In this case, the isomerization catalyst may be as described above.
- the isomerization reaction zone is not particularly limited, but may be provided at the top 5% to 50% of the total height of the distillation column for a smooth isomerization reaction. That is, the isomerization reaction region 31 may be located at a point more than an intermediate point in the height direction of the distillation column 30.
- the distillation column 30 of the treatment unit may include a top discharge line 11 for discharging the separated upper fraction separated and a bottom discharge line 20 for discharging the lower fraction.
- the recovery unit is connected to the treatment unit to recover the reaction product separated through the distillation column 30 of the treatment unit, the upper fraction recovery unit connected to the top discharge line 11 and the bottom discharge line 20 and
- the upper fraction recovery part and the lower fraction recovery part may each include a first reflux line and a second reflux line for reintroducing at least a portion of each fraction into the treatment part.
- the first reflux line includes a reflux line 1 (12), reflux line 2 (13), reflux line 4 (14) and reflux line 5 (18) to be described later as a transfer line for refluxing the upper fraction.
- the second reflux line may include a reflux line 3 (21) and a reflux line 6 (22) to be described below as a transfer line for refluxing the lower fraction.
- the recovery unit may be a compressor 33, the heat exchanger 36 and the reflux drum 34, is connected to the compressor 33, the heat exchanger 36 and the reflux drum 34, the upper portion It may comprise a number of lines for conveying fractions or subfractions.
- the upper fraction recovery part may include an upper fraction recovery line 19 for recovering the upper fraction transferred from the overhead discharge line 11 and a plurality of reflux lines for reintroducing at least a portion of the fraction into the treatment part.
- the overhead discharge line 11 may be connected to the reflux drum 34 of the upper fraction recovery part, and the upper fraction may be transferred into the reflux drum 34 through the overhead discharge line 11.
- at least a portion of the upper fraction may be transferred to the compressor 33 through the reflux line 1 (12) connected to the overhead discharge line (11).
- the upper fraction conveyed through the top discharge line 11 may be heated through a heat exchanger and then transferred to the reflux drum 34 or the compressor 33.
- the reflux drum 34 may be connected to the reflux line 4 (14), at least a portion of the upper fraction condensed through the reflux line 4 (14) may be transferred to the reflux drum (34). Meanwhile, at least a portion of the upper fraction transferred to the compressor 33 may be compressed and transferred to the heat exchanger 36 through reflux line 2 13 connected to the heat exchanger 36.
- the lower fraction recovery unit may include a lower fraction recovery line 23 for recovering the lower fraction transferred from the bottom discharge line 20 and a plurality of reflux lines for reintroducing at least a portion of the lower fraction into the treatment unit.
- the lower fraction may be discharged to the lower fraction recovery line 23 through the bottom discharge line 20 and recovered, and at least a portion of the lower fraction may be returned to the heat exchanger through reflux line 3 21 connected to the heat exchanger 36. Can be transported.
- the heat exchanger 36 may be operated by heat exchange between at least a portion of the upper fraction conveyed through reflux line 2 (13) and at least a portion of the lower fraction conveyed through reflux line 3 (21), thereby At least a portion of the upper fraction may be condensed and at least a portion of the lower fraction may be vaporized.
- At least a portion of the condensed top fraction may be conveyed to the reflux drum 34 through reflux line 4 14 as described above.
- the reflux drum 34 includes at least a portion of an upper fraction of the gaseous phase transferred from the top discharge line 11 and an upper fraction of the liquid phase transferred through the reflux line 4 (14). 34) the liquid phase and the gas phase are separated so that at least a portion of the upper fraction of the liquid phase is reintroduced to the treatment section via reflux line 5 (18), and the upper fraction of the gas phase is discharged through the upper fraction recovery line 19 to be recovered. Can be.
- vaporized bottom fraction may be reintroduced to the treatment unit via reflux line 6 (22).
- the separation process system facilitates 1-butene and isobutene by isomerizing 1-butene to 2-butene through a treatment unit in which a distillation column having an isomerization reaction zone is disposed. Not only can it be easily separated, but each fraction can be efficiently refluxed to the treatment section without using separate reflux systems (eg, condensers and reboilers), thereby increasing process efficiency and reducing economic costs.
- a distillation column having an isomerization reaction zone is disposed.
- the following examples and comparative examples simulated the separation method according to the present invention using a commercial process simulation program ASPEN PLUS.
- the constants required for the simulations include values embedded in the program, values described in the literature, and values obtained from existing C4 separation and manufacturing processes.
- the theoretical stage was set to 100 stages and the isomerization reaction zone was set between 20 and 40 stages, and the upper pressure was fixed at 4 kgf / cm 2 G, and the top of the distillation column was set at 39 ° C.
- the temperature of the isomerization reaction zone was adjusted to 46 ° C. to 51 ° C.
- the selectivity of the catalyst provided in the isomerization zone is assumed to be 100%.
- the reactant olefinic fraction contained 0.5 wt% propylene, 25.0 wt% isobutane, 20.0 wt% isobutene, 15.0 wt% 1-butene, 31.0 wt% 2-butene, 8.0 wt% normal butane and 0.5 wt% normalpentane.
- the composition was set to the total flow rate was set to 10,000 kg / hr.
- the reflux ratios of the upper and lower fractions refluxed were adjusted to 96.37% and 95.76%, respectively, and the results of the process are shown in Table 1 below.
- the heat duty was 0 Gcal / hr and the cooling duty was -1.14 Gcal / hr.
- the simulation was carried out through the process system as shown in FIG. 2, and the process was performed by setting the same conditions as in the above example except that the isomerization reactor conditions were separately set. At this time, the isomerization reactor was set at a temperature of 50 ° C. and a pressure of 4.8 kgf / cm 2 G. The results are shown in Table 2 below, the heat duty was 10.06 Gcal / hr and the cooling duty was ⁇ 10.01 Gcal / hr.
- the amount of unreacted 1-butene in the upper fraction separated through the separation process of the above example was reduced to a level of about 1/12 compared with the separation process through the comparative example, and the amount of isobunten in the lower fraction was Compared to the separation process through the comparative example, the level was reduced to about 1/13.
- the separation process according to the embodiment according to an embodiment of the present invention by converting 1-butene to 2-butene and fractional distillation by using a distillation column equipped with an isomerization reaction zone.
- the isobutene and 1-butene can be easily separated in a simplified process, and cost is reduced by not using a separate reflux system.
- the separation method according to an embodiment of the present invention can easily reflux the upper fraction and the lower fraction without using a separate reflux system.
- the separation method and the separation process system for recovering normal butene from the olefinic fraction according to the present invention are isobutene from an olefinic fraction including isobutene, isobutane, 1-butene and 2-butene, etc. in a simplified process. It can effectively separate and 1-butene to recover high purity normal butenes, and at the same time it is possible to reflux each of the recovered upper fraction and the lower fraction without using condenser and reboiler separately, reducing the cost while separating Can be further increased.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Description
Claims (29)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/325,329 US10227270B2 (en) | 2015-05-13 | 2016-04-28 | Method of separating normal butene using isomerization and process system for separating normal butene |
| JP2016574443A JP6483162B2 (ja) | 2015-05-13 | 2016-04-28 | 異性化反応を用いたノルマルブテンの分離方法及びノルマルブテンを分離するための工程システム |
| CN201680001979.1A CN106536459B (zh) | 2015-05-13 | 2016-04-28 | 使用异构化反应分离正丁烯的方法以及用于分离正丁烯的工艺系统 |
| US16/250,811 US10308566B1 (en) | 2015-05-13 | 2019-01-17 | Method of separating normal butene using isomerization and process system for separating normal butene |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150066867A KR101966773B1 (ko) | 2015-05-13 | 2015-05-13 | 이성질화 반응을 이용한 노말부텐의 분리방법 및 노말부텐을 분리하기 위한 공정시스템 |
| KR10-2015-0066867 | 2015-05-13 |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US15/325,329 A-371-Of-International US10227270B2 (en) | 2015-05-13 | 2016-04-28 | Method of separating normal butene using isomerization and process system for separating normal butene |
| US16/250,811 Division US10308566B1 (en) | 2015-05-13 | 2019-01-17 | Method of separating normal butene using isomerization and process system for separating normal butene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016182234A1 true WO2016182234A1 (ko) | 2016-11-17 |
Family
ID=57248111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2016/004459 Ceased WO2016182234A1 (ko) | 2015-05-13 | 2016-04-28 | 이성질화 반응을 이용한 노말부텐의 분리방법 및 노말부텐을 분리하기 위한 공정시스템 |
Country Status (5)
| Country | Link |
|---|---|
| US (2) | US10227270B2 (ko) |
| JP (1) | JP6483162B2 (ko) |
| KR (1) | KR101966773B1 (ko) |
| CN (1) | CN106536459B (ko) |
| WO (1) | WO2016182234A1 (ko) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020522376A (ja) * | 2017-06-08 | 2020-07-30 | エルジー・ケム・リミテッド | 蒸留装置および蒸留方法 |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102358406B1 (ko) * | 2017-07-31 | 2022-02-03 | 주식회사 엘지화학 | 라피네이트-2 의 정제 방법 |
| KR102387477B1 (ko) * | 2017-11-17 | 2022-04-14 | 주식회사 엘지화학 | 라피네이트-2 의 정제 방법 |
| US12503413B2 (en) * | 2023-10-30 | 2025-12-23 | Uop Llc | Heating integration with fired heaters |
| EP4563560A1 (de) * | 2023-11-29 | 2025-06-04 | Evonik Oxeno GmbH & Co. KG | Energieeffizientes verfahren zur abtrennung von 1-buten aus einem kohlenwasserstoffstrom mit optimierter brüdenverdichtung |
| EP4563561A1 (de) * | 2023-11-29 | 2025-06-04 | Evonik Oxeno GmbH & Co. KG | Energieeffizientes verfahren zur abtrennung von 1-buten aus einem kohlenwasserstoffstrom unter einsatz eines wärmeträgers |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR920006264A (ko) * | 1990-09-04 | 1992-04-27 | 원본미기재 | 단일 반응 존내 동시 수소화/탈수소화 반응 |
| KR970001286A (ko) * | 1995-06-30 | 1997-01-24 | 마르코 제나리 | 부텐-1의 통합 제조 방법 |
| KR20000029848A (ko) * | 1996-08-08 | 2000-05-25 | 엘마레, 알프레드 | 이소부텐과1-부텐을함유하는분획물로부터고순도이소부텐을생산하는방법 |
| KR20120128685A (ko) * | 2010-03-15 | 2012-11-27 | 토탈 리서치 앤드 테크놀로지 펠루이 | 산 촉매 상에서의 이소부탄올의 동시적인 탈수 및 골격 이성질체화 |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0734449B2 (ja) | 1987-11-30 | 1995-04-12 | 三菱電機株式会社 | 半導体装置の電極接合部構造 |
| TW212224B (ko) | 1992-02-28 | 1993-09-01 | Sanyo Denki Kk | |
| JP2000029848A (ja) | 1998-07-10 | 2000-01-28 | Matsushita Electric Ind Co Ltd | 協調ネットワークシステム |
| JP3975312B2 (ja) * | 1999-03-30 | 2007-09-12 | 大阪瓦斯株式会社 | 廃塩酸の処理方法 |
| US6242661B1 (en) | 1999-07-16 | 2001-06-05 | Catalytic Distillation Technologies | Process for the separation of isobutene from normal butenes |
| US7888541B2 (en) | 2005-04-15 | 2011-02-15 | Catalytic Distillation Technologies | Double bond hydroisomerization of butenes |
| US20060235255A1 (en) | 2005-04-15 | 2006-10-19 | Gartside Robert J | Double bond hydroisomerization process |
| US20060235254A1 (en) | 2005-04-15 | 2006-10-19 | Gartside Robert J | Double bond hydroisomerization process |
| US7982086B2 (en) * | 2009-02-03 | 2011-07-19 | Catalytic Distillation Technologies | Deisobutenizer |
| US9260355B2 (en) | 2010-03-15 | 2016-02-16 | Total Research & Technology Feluy | Production of propylene via simultaneous dehydration and skeletal isomerisation of isobutanol on acid catalysts followed by metathesis |
| JP5845590B2 (ja) * | 2011-02-14 | 2016-01-20 | 富士電機株式会社 | ヒートポンプ式蒸気生成装置 |
-
2015
- 2015-05-13 KR KR1020150066867A patent/KR101966773B1/ko active Active
-
2016
- 2016-04-28 WO PCT/KR2016/004459 patent/WO2016182234A1/ko not_active Ceased
- 2016-04-28 JP JP2016574443A patent/JP6483162B2/ja active Active
- 2016-04-28 US US15/325,329 patent/US10227270B2/en active Active
- 2016-04-28 CN CN201680001979.1A patent/CN106536459B/zh active Active
-
2019
- 2019-01-17 US US16/250,811 patent/US10308566B1/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR920006264A (ko) * | 1990-09-04 | 1992-04-27 | 원본미기재 | 단일 반응 존내 동시 수소화/탈수소화 반응 |
| KR970001286A (ko) * | 1995-06-30 | 1997-01-24 | 마르코 제나리 | 부텐-1의 통합 제조 방법 |
| KR20000029848A (ko) * | 1996-08-08 | 2000-05-25 | 엘마레, 알프레드 | 이소부텐과1-부텐을함유하는분획물로부터고순도이소부텐을생산하는방법 |
| KR20120128685A (ko) * | 2010-03-15 | 2012-11-27 | 토탈 리서치 앤드 테크놀로지 펠루이 | 산 촉매 상에서의 이소부탄올의 동시적인 탈수 및 골격 이성질체화 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020522376A (ja) * | 2017-06-08 | 2020-07-30 | エルジー・ケム・リミテッド | 蒸留装置および蒸留方法 |
| US11103803B2 (en) | 2017-06-08 | 2021-08-31 | Lg Chem, Ltd. | Distillation device and distillation method |
Also Published As
| Publication number | Publication date |
|---|---|
| US10308566B1 (en) | 2019-06-04 |
| CN106536459A (zh) | 2017-03-22 |
| JP6483162B2 (ja) | 2019-03-13 |
| KR101966773B1 (ko) | 2019-04-08 |
| US20170166497A1 (en) | 2017-06-15 |
| KR20160133829A (ko) | 2016-11-23 |
| CN106536459B (zh) | 2019-12-10 |
| US10227270B2 (en) | 2019-03-12 |
| JP2018514502A (ja) | 2018-06-07 |
| US20190152878A1 (en) | 2019-05-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2016182234A1 (ko) | 이성질화 반응을 이용한 노말부텐의 분리방법 및 노말부텐을 분리하기 위한 공정시스템 | |
| JP5327485B2 (ja) | アセチレン転換を用いた原油c4留分からの1,3−ブタジエン分離方法 | |
| KR100312091B1 (ko) | 촉매 증류를 이용하는 올레핀 플랜트 회수 시스템 | |
| WO2016093558A1 (ko) | 프로판-함유 공급원료의 탈수소반응 생성물로부터 프로필렌을 분리하는 방법 | |
| WO2019098501A1 (ko) | 페놀 제조 공정에서의 부산물 분해방법 | |
| AU2004259076B2 (en) | Method for the separation of a crude C4 cut | |
| KR102792960B1 (ko) | 1-부텐 및 프로필렌 제조 방법 | |
| WO2019027165A2 (ko) | 라피네이트-2 의 정제 방법 | |
| WO2019098502A1 (ko) | 페놀 제조 공정에서의 부산물 분해방법 | |
| WO2019098500A1 (ko) | 라피네이트-2 의 정제 방법 | |
| CN101092323B (zh) | 含碳烯烃催化裂解制轻质烯烃的方法 | |
| JP2021514964A (ja) | フェノール系副産物の分解方法およびその分解装置 | |
| WO2021033993A1 (ko) | 올리고머 제조 방법 및 올리고머 제조 장치 | |
| WO2021015541A1 (en) | Method of recovering unreacted ethylene in ethylene oligomerization process | |
| WO2017111356A1 (ko) | 에너지가 절감된 스타이렌과 알파메틸스타이렌의 동시 제조 방법 및 장치 | |
| WO2018052217A1 (ko) | 선택 증류 장치 및 증류 방법 | |
| WO2025105771A1 (ko) | 이소프로필 알코올의 정제 방법 | |
| WO2022030784A1 (ko) | 1-부텐 및 프로필렌 제조방법 | |
| US11932597B2 (en) | Converting isobutane and refinery C4S to propylene | |
| EP4585583A1 (en) | Method of preparing isopropyl alcohol | |
| WO2025105772A1 (ko) | 이소프로필 알코올의 정제 방법 | |
| WO2018225908A1 (ko) | 에틸렌 분리공정 및 분리장치 | |
| WO2025053403A1 (ko) | 이소프로필 알코올의 제조 방법 | |
| WO2025105774A1 (ko) | 이소프로필 알코올의 제조방법 | |
| CN117700293A (zh) | 一种回收乙烯的α烯烃生产方法及装置 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ENP | Entry into the national phase |
Ref document number: 2016574443 Country of ref document: JP Kind code of ref document: A |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16792880 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 15325329 Country of ref document: US |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 16792880 Country of ref document: EP Kind code of ref document: A1 |

