WO2024043443A1 - 이소프로필 알코올의 제조 방법 - Google Patents
이소프로필 알코올의 제조 방법 Download PDFInfo
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- WO2024043443A1 WO2024043443A1 PCT/KR2023/007144 KR2023007144W WO2024043443A1 WO 2024043443 A1 WO2024043443 A1 WO 2024043443A1 KR 2023007144 W KR2023007144 W KR 2023007144W WO 2024043443 A1 WO2024043443 A1 WO 2024043443A1
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- WIPO (PCT)
- Prior art keywords
- water
- isopropyl alcohol
- heat exchanger
- reaction
- process water
- Prior art date
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- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 title claims abstract description 318
- 238000000034 method Methods 0.000 title claims abstract description 118
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 277
- 238000006243 chemical reaction Methods 0.000 claims abstract description 89
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 29
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims abstract description 25
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims abstract description 25
- 239000000178 monomer Substances 0.000 claims abstract description 18
- 238000005406 washing Methods 0.000 claims description 35
- 238000010521 absorption reaction Methods 0.000 claims description 28
- 238000000746 purification Methods 0.000 claims description 26
- 239000005416 organic matter Substances 0.000 claims description 25
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 14
- 239000007791 liquid phase Substances 0.000 claims description 13
- 239000006227 byproduct Substances 0.000 claims description 9
- 238000009835 boiling Methods 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 3
- -1 isopropyl alcohol Chemical compound 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 description 23
- 239000007789 gas Substances 0.000 description 16
- 238000000926 separation method Methods 0.000 description 10
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000011143 downstream manufacturing Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 238000010574 gas phase reaction Methods 0.000 description 5
- ZAFNJMIOTHYJRJ-UHFFFAOYSA-N Diisopropyl ether Chemical compound CC(C)OC(C)C ZAFNJMIOTHYJRJ-UHFFFAOYSA-N 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 238000004065 wastewater treatment Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 108010037444 diisopropylglutathione ester Proteins 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/03—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by addition of hydroxy groups to unsaturated carbon-to-carbon bonds, e.g. with the aid of H2O2
- C07C29/04—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by addition of hydroxy groups to unsaturated carbon-to-carbon bonds, e.g. with the aid of H2O2 by hydration of carbon-to-carbon double bonds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/88—Separation; Purification; Use of additives, e.g. for stabilisation by treatment giving rise to a chemical modification of at least one compound
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C31/00—Saturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
- C07C31/02—Monohydroxylic acyclic alcohols
- C07C31/10—Monohydroxylic acyclic alcohols containing three carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C31/00—Saturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
- C07C31/02—Monohydroxylic acyclic alcohols
- C07C31/12—Monohydroxylic acyclic alcohols containing four carbon atoms
Definitions
- the present invention relates to a process for producing isopropyl alcohol.
- Isopropyl alcohol is used in the electronics industry such as semiconductor or LCD (liquid crystal display) manufacturing for a variety of purposes, including as a solvent for detergents, industrial paints and reagent raw materials, paints, and inks.
- Isopropyl alcohol can be produced by reacting propylene with water.
- propylene monomer and water undergo a gas phase reaction to obtain a reaction product containing isopropyl alcohol, unreacted propylene monomer, unreacted water, and by-products, and the gas phase reaction product passes through a downstream process tower. It involves the process of purifying isopropyl alcohol by separating propylene monomer, water, and by-products.
- water (40°C) used as reaction water is heated to the target temperature (100°C) and then supplied to the reactor to react with propylene to produce isopropyl alcohol, and unreacted water is purified in the isopropyl alcohol purification section. After being separated and cooled, it can be recycled into two types of process water and used to wash the absorption tower and organic matter (hydrocarbon) removal tower, and some of it is discharged as waste water.
- the reaction water supplied to the reactor needs to be heated to 100°C, and the process water recovered through the reactor needs to be cooled to be recycled as washing water.
- reaction water at 40°C was heat exchanged with process water (103°C) recovered through the purification process of isopropyl alcohol.
- process water 103°C
- the temperature must be maintained at 96°C, so the amount of heat transferred by heat exchange with the process water is limited, and preheating of the reaction water is only performed at about 73°C. Therefore, in order to raise the reaction water to the target temperature (100°C), a hot utility such as steam or steam condensate is required.
- the process water cooled to 96°C by heat exchange is mixed with low-temperature wastewater to be used for washing the absorption tower and organic matter removal tower, and is then adjusted to 91°C and 94°C for recycling. Some of it is discharged into wastewater.
- Figure 1 schematically shows the process in which reaction water is heated before being supplied to the reactor in a conventional IPA production process.
- the gaseous reaction product obtained in the reactor 100 is absorbed into the absorption tower 201, the gas purification unit 202, the organic matter removal tower 301, the water removal tower 302, and the IPA separation unit 303. ), purified IPA was obtained, and the 103°C water recovered from the bottom of the water removal tower 302 was heat exchanged with reaction water at 40°C in the first heat exchanger (10a) to use it as process water. Thereafter, the reaction water preheated to 73°C by the heat exchange is supplied to the second heat exchanger (10b) and heated to the target temperature (100°C) using a heating means (e.g., low-pressure steam or low-pressure steam condensate of 140 to 200°C).
- a heating means e.g., low-pressure steam or low-pressure steam condensate of 140 to 200°C.
- the process water at 103°C is cooled to 96°C through heat exchange with reaction water at 40°C, and then part of it is transferred to the absorption tower (201) and the organic matter removal tower (301) to be used as washing water, and the remainder is used as waste water. discharged. That is, the process water can be heat-exchanged with cooling water in the cooler 20 and discharged as low-temperature wastewater, and a portion of the low-temperature wastewater is divided into the process water at 96°C, the process water at 91°C, and the process water at 94°C. It can be used to control water flow.
- the present invention is intended to solve the problems mentioned in the technology behind the invention, and the reaction water used in the production of isopropyl alcohol is heated to the target temperature only by heat exchange without a separate heating means and supplied to the reactor, thereby reducing energy consumption and The goal is to provide a way to minimize cost increases.
- a method for producing isopropyl alcohol in which the reaction water is first heated in contact with a portion of the process water cooled in the first heat exchanger and then secondarily heated in contact with the process water in the second heat exchanger.
- the reaction water used in the production of isopropyl alcohol is first heated by heat exchange with the cooled stream of the process water recovered through the downstream process of the reactor, and then heated with the process water at a higher temperature than the cooled stream.
- Figure 1 shows the process in which reaction water is heated before being supplied to the reactor in a conventional IPA production process.
- Figure 2 shows a process in which reaction water is heated before being supplied to the reactor in the IPA production method according to an embodiment of the present invention.
- 'comprising' or 'containing' specifies a specific characteristic, area, integer, step, operation, element, or ingredient, and the addition of another specific characteristic, area, integer, step, operation, element, or ingredient. It is not excluded.
- the term 'stream' used herein may refer to the flow of fluid within a process, or may also refer to the fluid itself flowing within a pipe. Specifically, the stream may refer to both the fluid itself and the flow of the fluid flowing within the pipes connecting each device. Additionally, the fluid may include any one or more of gas, liquid, and solid.
- One embodiment of the present invention relates to a method for producing isopropyl alcohol (IPA), comprising (S1) raising the temperature of reaction water by passing it through a first heat exchanger and a second heat exchanger, (S2) the second heat exchanger. Supplying the reaction water that has passed through the heat exchanger to the reactor as a feed stream along with propylene monomer to produce a gaseous reaction product containing isopropyl alcohol (IPA), (S3) isopropyl alcohol from the gaseous reaction product. Purifying and recovering process water; and (S4) cooling the process water by passing it through the second heat exchanger, transferring a portion of the cooled process water to the first heat exchanger, and transferring the reaction water to the first heat exchanger.
- the temperature may be raised first by contacting a portion of the process water cooled in the first heat exchanger, and then secondarily raised by contact with the process water in the second heat exchanger.
- Figure 2 illustrates a method for producing isopropyl alcohol according to an embodiment of the present invention, comprising a first heat exchanger (10a), a second heat exchanger (10b), a cooler (20), a reactor (100), and an absorption tower ( 201), isopropyl alcohol can be produced using a system including a gas purification unit 202, an organic matter removal tower 301, a water removal tower 302, and an IPA separation unit 303.
- water used as a raw material for producing isopropyl alcohol that is, reaction water
- reaction water is heated from an initial temperature of 30 to 50 °C (e.g., 40 °C) to a target temperature of at least 100 °C for gas phase reaction with propylene. After that, it is supplied to the reactor.
- the present invention is characterized in that the temperature of the reaction water is raised to the target temperature by performing a secondary heat exchange using the process water recovered in the subsequent process before supplying the reaction water to the reactor 100.
- the reaction water 11 is contacted with a portion 302b'-3 of the cooled stream 302b' of the process water recovered through the downstream process in the first heat exchanger 10a.
- the temperature is first raised by heat exchange, and the temperature is raised secondarily by subsequent heat exchange in which the first heated stream (11') is brought into contact with a process water stream (302b) having a higher temperature than the cooled stream in the second heat exchanger (10b).
- the heated reaction water (11") is supplied to the reactor (100).
- the process water is recovered in the process of purifying isopropyl alcohol by passing the gaseous reaction product through the absorption tower, organic matter removal tower, and water removal tower, which are downstream processes, and separating unreacted propylene monomer and by-products. It may contain unreacted water and washing water. Since the recovered process water is a stream discharged from the bottom of the water removal tower 302, it is at a high temperature of 103 to 110 ° C., for example, 105 to 107 ° C., and therefore requires cooling in order to be recycled.
- the process water 302b recovered from the downstream process tower may pass through the second heat exchanger 10b and be cooled to 98 to 104 °C, for example, 100 to 104 °C. Only when the above cooling temperature range is satisfied can the optimal temperature range be maintained during the temperature control process using wastewater to use the process water for cleaning of the downstream process tower.
- the wastewater may be discharged through the heat exchanger (10a) and, if necessary, an additional cooler (20).
- the process water 302b' cooled to a temperature of 98 to 104°C after passing through the heat exchanger 10b is branched into the washing water 302b'-1 of the absorption tower 201 and the washing water of the organic matter removal tower 301.
- another portion (302b'-3) of the cooled process water may be used for heat exchange with reaction water.
- a portion of the cooled process water stream 302b'-3 may be in contact with the reaction water 11 in the first heat exchanger 10a to exchange heat, and the reaction water stream passing through the first heat exchanger may be performed.
- (11') may be first heated to a temperature of 80 to 95°C, for example, 90 to 92°C.
- a portion of the cooled process water stream 302b'-3 may pass through the first heat exchanger 10a and be secondary cooled to 40 to 70°C.
- the flow rate ratio (wt/wt) of the reaction water 11 and the cooled process water 302b'-3 passing through the first heat exchanger 10a is 1:1 to 1:1.7. , for example, may be 1:2 to 1:1.6, and when the flow rate range is satisfied, the size of the second heat exchanger (10b) can be reduced while raising the reaction water to the target temperature (e.g., 80 to 95 ° C.), 1
- the area dedicated to heat transfer of the heat exchanger (10a) can be optimally designed.
- the secondarily cooled process water (302b"-3) passing through the first heat exchanger (10a) can be treated as waste water, and if necessary, is branched after passing through an additional cooler (20) and some of it is used to control the temperature of the washing water. can be used and the remainder can be discharged into waste water.
- reaction water of which the primary temperature was raised may be secondaryly heated to 95 to 100° C., for example, 98 to 100° C. by contacting the high-temperature process water stream 302b in the second heat exchanger 10b.
- the flow rate ratio (wt/wt) of the primary temperature-elevated reaction water 11' and the process water 302b passing through the second heat exchanger is 1:4 to 1:8, for example, 1: It may be 4 to 1:6, and when the above flow rate range is satisfied, sufficient washing water can be supplied to the absorption tower and organic matter removal tower while raising the reaction water to the target temperature (100°C) and preventing excessive energy consumption in the IPA separation unit. You can.
- the secondary temperature-elevated reaction water stream (11") is supplied to the reactor (100) and undergoes a gas phase reaction with propylene (1) to obtain a reaction product (101) containing isopropyl alcohol.
- the reaction product may include 65 to 85% by weight of unreacted propylene monomer, 4 to 8% by weight of isopropyl alcohol, and 5 to 30% by weight of water.
- the reaction product may further include high boiling point organic substances such as isopropyl ether (DIPE), hexene, etc., acetone, and other by-products of n-propyl alcohol (NPA). Therefore, a back-end process is performed to purify isopropyl alcohol from the reaction product.
- DIPE isopropyl ether
- hexene etc.
- acetone acetone
- NPA n-propyl alcohol
- the gaseous reaction product 101 is supplied to the absorption tower 201 and brought into contact with washing water to obtain an aqueous solution 201b containing isopropyl alcohol.
- the process water (302b) recovered from the downstream water removal tower (302) passes through the second heat exchanger (10b) as the washing water of the absorption tower (201) and cools the stream (302b'). Part 302b'-1 may be used.
- the reaction product 101 may be supplied to the bottom of the absorption tower 201, and the washing water may be supplied from the top of the absorption tower 201, and the isopropyl alcohol in the gas phase may be absorbed by the washing water into the lower liquid stream. Obtained as (201b), the gaseous stream (201a) containing unreacted propylene monomer can be separated at the top and returned to the reactor (100).
- the lower liquid stream of the absorption tower 201 may contain a small amount of unreacted propylene monomer, for example, 5% by weight or less or 2 to 5% by weight, in addition to isopropyl alcohol and unreacted water.
- the flow rate of the washing water supplied to the absorption tower 201 may be 15 to 40% by weight or 15 to 35% by weight of the flow rate of the reaction product.
- the absorption capacity of isopropyl alcohol contained in the reaction product can be improved, and at the same time, the energy cost for recovering the washing water at the downstream can be prevented from being excessively increased.
- the absorption tower 201 may be operated at a temperature of 90 to 100° C. or 90 to 95° C. and a pressure of 25 to 40 kg/cm 2 ⁇ g or 25 to 35 kg/cm 2 ⁇ g. When the above operating conditions are met, the top discharge stream containing unreacted propylene monomer and the bottom discharge stream containing isopropyl alcohol can be effectively separated.
- the liquid stream 201b containing isopropyl alcohol separated in the absorption tower 201 is supplied to the gas purification unit 202 and includes an upper stream 202a containing low boiling point components, isopropyl alcohol, water, and by-products. It can be separated into a lower stream 202b.
- the upper stream 202a containing the low boiling point components separated in the gas purification unit may include unreacted propylene monomer and inert gas (eg, ethane, propane).
- unreacted propylene monomer and inert gas eg, ethane, propane
- the bottom stream 202b separated from the gas purification unit may include isopropyl alcohol, water, and by-products (eg, isopropyl ether (DIPE), hexene, n-propyl alcohol (NPA), etc.).
- DIPE isopropyl ether
- NPA n-propyl alcohol
- the gas purification unit 202 may include one or more flash drums and one or more gas purification towers. First, the low boiling point components are primarily separated in the flash drum, and then supplied to the gas purification tower to separate the low boiling point components of unreacted propylene monomer and inert gas at the top and a trace amount of high boiling point components at the bottom.
- the unreacted propylene monomer separated in the gas purification unit can be recovered into the reactor 100, and the inert gas can be branched for exhaust.
- the bottom stream 202b of the gas purification unit 202 is transferred to the IPA purification unit for IPA recovery.
- the process water (302b) recovered from the downstream water removal tower (302) is used as the washing water of the organic matter removal tower (301), and a portion of the cooled stream (302b) passes through the second heat exchanger (10b). -2) can be used.
- the alcohol component is dissolved by the washing water, and the liquid phase 301a containing the alcohol component and water of the organic matter removal tower 301 is separated to the lower part, and the remaining organic liquid phase 301b can be removed in the connected condenser.
- the flow rate of the washing water supplied to the organic matter removal tower 301 may be 60 to 100% by weight or 65 to 95% by weight of the flow rate of the stream 202b.
- the absorption capacity of isopropyl alcohol contained in the stream can be improved, and at the same time, the energy cost for recovering the washing water at the downstream can be prevented from being excessively increased.
- the liquid phase 301a separated in the organic matter removal tower 301 may include 3 to 10% by weight of isopropyl alcohol and 90 to 97% by weight of water. That is, most of the liquid phase 301a contains washing water, so separation is necessary.
- liquid phase 301a separated from the organic matter removal tower 301 and containing isopropyl alcohol and water is supplied to the water removal tower 302 to produce a stream 302a containing isopropyl alcohol at the top and a bottom stream of water. Separate into (302b).
- the stream 302a separated in the water removal tower 302 contains an azeotropic mixture of isopropyl alcohol and water, and may include, for example, 80 to 90% by weight of isopropyl alcohol and 10 to 20% by weight of water.
- the water stream 302b is recovered as process water, and then cooled by passing through the second heat exchanger 10b, and some of it is recycled as washing water and the rest is used for heat exchange of reaction water. You can.
- the water removal tower 302 may be operated at a temperature of 70 to 150° C. or 80 to 140° C. and a pressure of 1 to 5 kg/cm 2 ⁇ g or 1 to 2 kg/cm 2 ⁇ g. When the above operating conditions are met, the azeotropic mixture of isopropyl alcohol and water can be effectively separated.
- the azeotrope stream (302a) separated in the water removal tower (302) is supplied to the IPA separation unit (303) including an IPA purification tower and a solvent recovery tower to recover IPA.
- an organic solvent e.g., cyclohexane, benzene, etc.
- the azeotrope of isopropyl alcohol and water is broken, thereby obtaining highly purified isopropyl alcohol.
- a stream containing an azeotrope and water can be separated at the top of the IPA purification tower and then supplied to a solvent recovery tower to separate the upper stream of the azeotrope and the lower stream of water. It can be refluxed to the IPA purification tower.
- devices such as distillation columns, condensers, reboilers, valves, pumps, separators, and mixers can be additionally used.
- the reaction water used in the production of isopropyl alcohol is first heated by heat exchange with the cooled stream of process water recovered through the downstream process of the reactor, and then the temperature is higher than the cooled stream.
- the first heat exchanger (10a), the second heat exchanger (10b), the cooler (20), the reactor (100), the absorption tower (201), the gas purification unit (202), and the organic matter removal tower ( Isopropyl alcohol was produced using a system including a water removal tower (301), a water removal tower (302), and an IPA separation unit (303).
- the first heat exchanger (10a) The flow rate ratio of the reaction water (11) and the process water stream (302b'-3) passing through was adjusted to 1:1.2.
- reaction water stream 11' initially heated to 91°C and the 105°C process water stream 302b recovered from the water removal tower 302 are passed through the second heat exchanger 10b, and the temperature is raised to 100°C.
- the second heated reaction water stream (11") and the process water stream (302b') cooled to 103° C. were discharged.
- the reaction water stream (11'') and the process water stream passing through the second heat exchanger (10b) were discharged.
- the flow ratio of (302b') was adjusted to 1:5.5.
- reaction water stream (11") which was secondarily heated to 100°C by passing through the second heat exchanger (10b), was supplied to the reactor (100).
- the process water (302b"-3) cooled to 101°C after passing through the first heat exchanger (10a) is transferred to the cooler 20 for wastewater treatment and cooled to 40°C by heat exchange with cooling water. Afterwards, it branched and some was used to control the temperature of the washing water, and the rest was discharged as wastewater.
- reaction water 11"
- propylene monomer (1) were subjected to a gas phase reaction to obtain a reaction product containing isopropyl alcohol, unreacted propylene monomer, water, and organic matter.
- the reaction product 101 containing isopropyl alcohol obtained in step 2 was supplied to the lower part of the absorption tower 201, and washing water was supplied to the upper part of the absorption tower 201.
- the liquid stream (201b) in which gaseous isopropyl alcohol was absorbed from the absorption tower (201) was discharged to the bottom, and the gaseous stream (201a) containing unreacted propylene monomer was separated to the top and recovered into the reactor (100). .
- the liquid stream 201b in which the isopropyl alcohol is absorbed passes through the gas purification unit 202 and is separated into a low boiling point upper stream 202a and a lower stream 202b containing isopropyl alcohol, water, and by-products. , the lower stream (202b) was transferred to the organic matter removal tower (301).
- the liquid phase 301a containing isopropyl alcohol and water is supplied to the water removal tower 302, and a stream 302a containing isopropyl alcohol and a lower stream 302b of water are supplied to the upper part of the water removal tower 302. ) was separated.
- the stream 302a containing the isopropyl alcohol was supplied to the IPA separation unit 303 to recover IPA.
- the stream 302b separated from the bottom of the water removal tower 302 was process water with a high temperature of 105°C, and was cooled to 103°C in the second heat exchanger 10b as described above. Part of the cooled process water was transferred to the first heat exchanger (10a) and used to raise the temperature of the reaction water (11), and the remainder was used as washing water.
- step 1 the same process as Example 1 was performed except that the flow rate ratio of the reaction water 11 and the process water stream 302b'-3 in the first heat exchanger 10a was adjusted to 1:2.5.
- the reaction water whose temperature was first raised was secondarily heated to 100°C by supplying steam from the second heat exchanger (10b).
- the process water cooled to 96°C after passing through the first heat exchanger (10a) branched and some of it was transferred to the absorption tower (201) and the organic matter removal tower (301) to be used as washing water, and the rest was sent to the wastewater treatment. It was transferred to the cooler 20 and cooled to 40°C by heat exchange with cooling water. Part of the process water cooled to 30°C was used to control the temperature of the washing water, and the remainder was discharged as waste water.
- reaction water whose temperature was secondarily raised to 100°C was supplied to the reactor 100, and a reaction product containing isopropyl alcohol was obtained through the same process as step 2 of Example 1.
- reaction product containing isopropyl alcohol obtained in step 2 was subjected to the same purification process as step 3 of Example 1 to recover isopropyl alcohol.
- Table 1 shows a comparison of the amount of heat consumed in raising the temperature of the reaction water and the amount of heat consumed in cooling the waste water in Examples and Comparative Examples.
- Reaction water temperature raising method Total amount of heat for temperature increase 1) Wastewater cooling heat capacity 2) 1st temperature increase 2nd temperature increase steam usage Process water heat exchange amount Comparative Example 1 Heat exchange of 40°C reaction water and 103°C process water Heating reaction water to 73°C first temperature increase with steam 0.45 0.55
- Example 1 Heat exchange of 40°C reaction water and 103°C process water (flow ratio 1:1.2) Heat exchange of 91°C primary temperature rise reaction water and 105°C process water (Flow ratio 1:5.5) 0 One 0.47
- Example 2 Heat exchange of 40°C reaction water and 103°C process water (flow ratio 1:2.5) Heat exchange of 91°C primary temperature rise reaction water and 105°C process water (Flow ratio 1:5.5) 0
- the total amount of heat required to raise the final temperature of the reaction water to 100°C is set to "1". 2) Heat exchange amount using cooling water for process water wastewater treatment, expressed based on the amount of heat consumed in Comparative Example 1.
- Example 1 the flow rate ratio of the 40°C reaction water (11) and the 103°C process water (302b'-3) passing through the first heat exchanger (10a) during the first temperature increase of the reaction water was adjusted to 1:1.2. By doing so, the amount of cooling heat consumed in wastewater treatment of process water after heat exchange could be reduced by up to 53% compared to Comparative Example 1.
- Example 2 As it increased to 2.5, the amount of heat for cooling waste water from process water increased compared to Comparative Example 1.
- absorption tower 211 absorption tower 211, 212: discharge stream of absorption tower
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- General Chemical & Material Sciences (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
반응수 승온 방법 | 승온을 위한 총열량1) | 폐수 냉각열량2) | |||
1차 승온 | 2차 승온 | 스팀 사용량 | 공정수 열교환량 | ||
비교예 1 | 40℃ 반응수 및 103℃ 공정수의 열교환 | 73℃ 1차 승온 반응수를 스팀으로 가열 | 0.45 | 0.55 | 1 |
실시예 1 | 40℃ 반응수 및 103℃ 공정수의 열교환(유량비 1:1.2) | 91℃ 1차 승온 반응수 및 105℃ 공정수의 열교환 (유량비 1:5.5) |
0 | 1 | 0.47 |
실시예 2 | 40℃ 반응수 및 103℃ 공정수의 열교환(유량비 1:2.5) | 91℃ 1차 승온 반응수 및 105℃ 공정수의 열교환 (유량비 1:5.5) |
0 | 1 | 4.09 |
1) 반응수의 최종 온도인 100℃의 승온에 필요한 총 열량을 "1"로 설정함. 2) 공정수의 폐수 처리를 위해 냉각수(cooling water)를 활용한 열교환량으로, 비교예 1에서 소비된 열량을 기준으로 나타냄. |
Claims (11)
- (S1) 반응수를 제1 열교환기 및 제2 열교환기를 통과하여 승온시키는 단계,(S2) 상기 제2 열교환기를 통과한 반응수를 프로필렌 단량체와 함께 피드 스트림으로 반응기에 공급하여 이소프로필 알코올(isopropyl alcohol, IPA)을 포함하는 기상 반응 생성물을 생성하는 단계,(S3) 상기 기상 반응 생성물로부터 이소프로필 알코올을 정제하고 공정수를 회수하는 단계, 및(S4) 상기 공정수를 상기 제2 열교환기에 통과시켜 냉각하고, 상기 냉각된 공정수의 일부는 제1 열교환기로 이송하는 단계를 포함하고,상기 반응수는 상기 제1 열교환기에서 냉각된 공정수의 일부와 접촉하여 1차 승온된 후, 제2 열교환기에서 공정수와 접촉하여 2차 승온되는 이소프로필 알코올의 제조 방법.
- 제1항에 있어서,상기 기상 반응 생성물은 이소프로필 알코올, 미반응 프로필렌, 미반응 물 및 부산물을 포함하는 이소프로필 알코올의 제조 방법.
- 제1항에 있어서, 상기 단계 (S3)은(i) 기상 반응 생성물을 흡수탑에 공급하고 세척수와 접촉시켜 이소프로필 알코올을 포함하는 수용액을 수득하고,(ii) 상기 이소프로필 알코올을 포함하는 수용액을 가스 정제부에 공급하여 저비점 성분을 포함하는 상부 스트림과 이소프로필 알코올, 물 및 부산물을 포함하는 하부 스트림을 분리하고,(iii) 상기 가스 정제부의 하부 스트림을 유기물 제거탑에 공급하고 세척수와 접촉시켜 이소프로필 알코올 및 물을 포함하는 액상 및 유기물을 포함하는 액상으로 분리하고,(iv) 상기 이소프로필 알코올 및 물을 포함하는 액상을 물 제거탑에 공급하여 이소프로필 알코올을 포함하는 상부 스트림 및 물의 하부 스트림으로 분리한 후, 상기 상부 스트림으로부터 이소프로필 알코올을 정제하고 상기 하부 스트림을 공정수로 회수하는 것을 포함하는 이소프로필 알코올 제조 방법.
- 제1항에 있어서,상기 단계 (S3)에서 회수된 공정수의 온도는 103 내지 110 ℃인 이소프로필 알코올 제조 방법.
- 제1항에 있어서,상기 회수된 공정수는 제2 열교환기를 통과하여 98 내지 104 ℃로 냉각되는 이소프로필 알코올 제조 방법.
- 제1항에 있어서,상기 제2 열교환기에서 냉각된 공정수는 제1 열교환기를 통과하여 40 내지 70℃로 2차 냉각되는 이소프로필 알코올 제조 방법.
- 제1항에 있어서,상기 반응수의 초기 온도는 30 내지 50℃인 이소프로필 알코올 제조 방법.
- 제1항에 있어서,상기 반응수는 제1 열교환기에서 냉각된 공정수의 일부와 접촉하여 80 내지 95℃의 범위로 1차 승온되는 이소프로필 알코올 제조 방법.
- 제1항에 있어서,상기 1차 승온된 반응수는 제2 열교환기에서 공정수와 접촉하여 95 내지 100 ℃로 2차 승온되는 이소프로필 알코올 제조 방법.
- 제1항에 있어서,상기 제1 열교환기를 통과하는 반응수 및 냉각된 공정수의 유량비(wt/wt)는 1:1 내지 1:1.7 인 이소프로필 알코올 제조 방법.
- 제1항에 있어서,상기 제2 열교환기를 통과하는 1차 승온된 반응수 및 공정수의 유량비(wt/wt)는 1:4 내지 1:8인 이소프로필 알코올 제조 방법.
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CN202380014312.5A CN118201898A (zh) | 2022-08-22 | 2023-05-25 | 用于制备异丙醇的方法 |
CA3237292A CA3237292A1 (en) | 2022-08-22 | 2023-05-25 | Method for preparing isopropyl alcohol |
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KR1020230053289A KR20240026843A (ko) | 2022-08-22 | 2023-04-24 | 이소프로필 알코올의 제조 방법 |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US3989762A (en) * | 1969-04-03 | 1976-11-02 | Veba-Chemie Ag | Process for the manufacture of alcohols by the hydration of olefins |
KR100219006B1 (ko) * | 1995-02-24 | 1999-09-01 | 사토 아키오 | 이소프로필알콜의 제조방법 |
KR20040055805A (ko) * | 2001-11-16 | 2004-06-26 | 쉘 인터내셔날 리써취 마트샤피지 비.브이. | 이소프로판올의 제조 방법 |
JP2010083825A (ja) * | 2008-10-01 | 2010-04-15 | Hitachi Zosen Corp | アルコール無水化システム |
KR20190019060A (ko) * | 2016-06-17 | 2019-02-26 | 가부시키가이샤 도쿠야마 | 이소프로필 알코올의 제조 방법 및 불순물이 저감된 이소프로필 알코올 |
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- 2023-05-25 WO PCT/KR2023/007144 patent/WO2024043443A1/ko active Application Filing
- 2023-05-25 CA CA3237292A patent/CA3237292A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US3989762A (en) * | 1969-04-03 | 1976-11-02 | Veba-Chemie Ag | Process for the manufacture of alcohols by the hydration of olefins |
KR100219006B1 (ko) * | 1995-02-24 | 1999-09-01 | 사토 아키오 | 이소프로필알콜의 제조방법 |
KR20040055805A (ko) * | 2001-11-16 | 2004-06-26 | 쉘 인터내셔날 리써취 마트샤피지 비.브이. | 이소프로판올의 제조 방법 |
JP2010083825A (ja) * | 2008-10-01 | 2010-04-15 | Hitachi Zosen Corp | アルコール無水化システム |
KR20190019060A (ko) * | 2016-06-17 | 2019-02-26 | 가부시키가이샤 도쿠야마 | 이소프로필 알코올의 제조 방법 및 불순물이 저감된 이소프로필 알코올 |
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