WO2009107840A1 - 醗酵アルコールの精製処理方法 - Google Patents
醗酵アルコールの精製処理方法 Download PDFInfo
- Publication number
- WO2009107840A1 WO2009107840A1 PCT/JP2009/053901 JP2009053901W WO2009107840A1 WO 2009107840 A1 WO2009107840 A1 WO 2009107840A1 JP 2009053901 W JP2009053901 W JP 2009053901W WO 2009107840 A1 WO2009107840 A1 WO 2009107840A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- alcohol
- water
- condensate
- distillation column
- tower
- Prior art date
Links
Images
Classifications
-
- 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
-
- 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
- B01D3/001—Processes specially adapted for distillation or rectification of fermented solutions
- B01D3/003—Rectification of spirit
- B01D3/004—Rectification of spirit by continuous methods
- B01D3/005—Combined distillation and rectification
-
- 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
- B01D3/42—Regulation; Control
- B01D3/4205—Reflux ratio control splitter
-
- 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
- C07C29/80—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Definitions
- the present invention is a fermentation alcohol purification treatment method, particularly in a fermentation alcohol purification treatment method that combines a mash tower, a distillation tower, an evaporator, and a membrane separation device.
- the present invention relates to a purification method.
- the alcohol-water mixture is separated and concentrated from the fermentation alcohol liquid (moromi) by the moromi tower, and then the azeotropic composition of the alcohol-water mixture by the concentration tower.
- a method of concentrating to near and then obtaining high-purity anhydrous alcohol by an azeotropic distillation column was employed.
- Patent Document 1 a membrane separation device is used instead of an azeotropic distillation column, and an alcohol-water mixture concentrated to near the azeotropic composition in the distillation column is evaporated by an evaporator and introduced into the membrane separation device for purification. A method of processing is disclosed.
- Patent Document 2 also discloses the same system as Patent Document 1.
- a distillation column fraction is introduced into an evaporator and heated, a mixed vapor of alcohol and water having a pressure higher than the operation pressure of the distillation column is generated, and this high pressure vapor is converted into a membrane separator.
- the membrane separation apparatus can be operated with high efficiency.
- the condensate obtained by condensing the fraction taken from the top of the distillation column is refluxed 10 to 90% to the distillation column to operate the distillation column.
- a 10% by mass ethanol aqueous solution is supplied to a distillation column and concentrated to 80% by mass, and the condensate is evaporated by an evaporator and supplied to a membrane separator.
- the equipment can be simplified and the energy efficiency can be improved.
- the method for purifying fermentation alcohol that combines the moromi tower, distillation tower, evaporator and membrane separation device, specifically, the fermentation alcohol can be purified more easily and extremely energy-efficiently as a whole process. Sufficient consideration has not been given to whether it can be processed.
- the object of the present invention is to supply a fermentation alcohol aqueous solution to the mash tower, heat the fermentation alcohol aqueous solution in the mash tower to distill a distillate containing a mixed steam of alcohol and water, and use the mixed steam.
- the mash column distillate containing or the first condensate condensed with the distillate is supplied to the distillation tower, and the distillate or the first condensate is heated to produce a mixed vapor of alcohol and water.
- a part of the second condensate obtained by distilling from the distillation tower and condensing the mixed vapor is refluxed to the distillation tower, and the remaining second condensate is supplied to the evaporator.
- Alkaline from aqueous fermented alcohol solution In the purification treatment method for obtaining Lumpur, it is to provide a method for more convenient and extremely energy efficient purification treatment as a whole step.
- the present invention relates to the following items. 1. (Step 1) Supplying the fermentation alcohol aqueous solution to the mash tower, heating the fermentation alcohol aqueous solution in the mash tower to distill the mixed steam of alcohol and water, or the mash tower distillate containing this mixed steam, or The first condensate obtained by condensing the distillate is supplied to the distillation tower, and (step 2) the distillate or the first condensate is heated to distill the mixed vapor of alcohol and water from the distillation tower.
- Step 3 a part of the second condensate condensed with the mixed vapor is refluxed to the distillation column, and the remaining second condensate is supplied to the evaporator, and then (Step 3) in the evaporator
- the second condensate is heated to produce a mixed vapor of alcohol and water, the mixed vapor of alcohol and water is supplied to the membrane separator, and water vapor is selectively removed from the mixed vapor of alcohol and water.
- the alcohol concentration of the mixed steam of alcohol and water distilled off by the mash tower in step 1 is less than 50% by mass (of course more than the concentration of the fermentation alcohol aqueous solution), preferably 12% by mass or more and less than 50% by mass, more preferably Is a mixed steam of alcohol and water that controls the mash tower so that it becomes 20 mass% or more and less than 50 mass%, more preferably 30 mass% or more and less than 50 mass%, and is distilled by the distillation tower in step 2.
- Purification for obtaining anhydrous alcohol from an aqueous fermentation alcohol solution characterized by controlling the reflux amount of the condensate to the distillation column so that the alcohol concentration of the alcohol is 65 to 85% by mass, preferably 65 to 78% by mass Processing method.
- step 1 and step 2 the operating pressures of the mash column and the distillation column are both 50 to 150 kPa (absolute pressure), preferably atmospheric pressure.
- step 3 the operating pressure of the evaporator is 150 kPa (absolute pressure) or more, Item 2.
- step 2 the second condensate obtained by heating the distillate or the first condensate supplied from the mash column in the distillation column to distill the mixed vapor of alcohol and water and condensing the mixed vapor.
- Item 5 The purification treatment method for obtaining anhydrous alcohol from the fermentation alcohol aqueous solution according to any one of Items 1 to 4, wherein an alkaline component is added and neutralized before the fermentation alcohol aqueous solution is supplied to the mash tower.
- the fermentation alcohol aqueous solution is supplied to the mash tower, the fermentation alcohol aqueous solution in the mash tower is heated to distill a distillate containing a mixed vapor of alcohol and water, and the distillate or distillate.
- the first condensate obtained by condensing the product is supplied to the distillation tower, the first condensate is heated to distill the mixed vapor of alcohol and water from the distillation tower, and the second condensate is obtained by condensing the mixed vapor.
- FIG. 1 shows an outline of an example of an embodiment according to the present invention.
- anhydrous alcohol has a purity of 99.0% by mass or more, preferably 99.5% by mass or more, more preferably 99.7% by mass or more, and particularly preferably 99.8% by mass or more.
- the alcohol includes lower alkyl alcohols such as methyl alcohol, propyl alcohol, and butyl alcohol, and is preferably ethanol.
- the fermented alcohol aqueous solution is not limited.
- it is a fermented alcohol aqueous solution obtained by fermenting raw materials such as saccharides, starches, and celluloses. These materials are fermented in a fermenter to form a fermented alcohol aqueous solution.
- the alcohol concentration of the aqueous fermentation alcohol solution is usually about 5 to 12% by mass.
- this fermented alcohol aqueous solution includes alcohols such as yeast, fungus, methanol, fatty acids such as formic acid, acetic acid, succinic acid, lactic acid, butyric acid, aldehydes such as acetaldehyde, formaldehyde, Esters such as ethyl acetate and butyl acetate, acetals such as diethyl acetal, ketones such as acetone and methyl ethyl ketone, amines such as pyridine, picoline, 3-methylamine and 4-methylpyridine, and higher alcohols and fatty acid esters It contains various by-produced compounds such as so-called fusel oil which is a mixture. Moreover, normally, unfermented raw material components and the like remain as insoluble components to form a slurry.
- alcohols such as yeast, fungus, methanol
- fatty acids such as formic acid, acetic acid, succinic acid, lactic acid, butyric acid
- This aqueous fermentation alcohol solution is supplied directly to the mash tower 10 directly from the fermentation tank or after being temporarily stored in the tank. It is preferable that a large insoluble component is removed from the fermentation alcohol aqueous solution by rough filtration before being supplied to the mash tower.
- the fermented alcohol aqueous solution after fermenting in the fermenter may have a pH of about 3 to 5 depending on by-product fatty acids. For this reason, it is preferable to neutralize the acid component contained in the fermentation alcohol aqueous solution by adding an alkali component or the like. By performing this neutralization treatment, it is possible to reliably prevent the acid from being mixed into the purified anhydrous alcohol.
- Suitable examples of the alkali component to be added include water-soluble alkali compounds such as sodium hydroxide, potassium hydroxide, and potassium permanganate.
- the fermentation alcohol aqueous solution is heated to distill a distillate containing a mixed vapor of alcohol and water, and a condensate obtained by condensing the distillate is supplied to the distillation tower 20.
- the distillate containing a mixture of alcohol and water is preferably a mixed vapor of alcohol and water (in a gaseous state), but a mixture containing droplets of a fermented alcohol aqueous solution in a mixed vapor of alcohol and water ( It may be a gas-liquid mixed state).
- the main role of the moromi tower 10 is to suppress the discharge (loss) of alcohol to the outside of the system as much as possible, from the fermented alcohol aqueous solution, insoluble components such as unfermented raw material components, and high-boiling components such as fusel oil. Is preferably separated and removed together with low-boiling by-product components and water.
- the moromi tower is not particularly limited, and a conventionally known type can be suitably used. Simple distillation or continuous distillation may be used. The number of distillation stages is preferably about several stages. For example, a shelf-type tray such as a mountain cap tray or a baffle tray with little adhesion of scale can be suitably used. Furthermore, it may be a single distillation type such as flash distillation or a combination of a plurality of them.
- the operating pressure of the moromi tower is preferably reduced pressure or atmospheric pressure.
- the raw fermentation alcohol aqueous solution is introduced into the tower from a feed port relatively close to the top of the moromi tower 10.
- steam steam
- This water vapor rises in the tower while exchanging heat and materials with the liquid flowing down the tower.
- the steam component at the bottom of the tower is almost water, and the alcohol concentration in the steam increases near the top of the tower.
- water containing almost no alcohol is discharged from the bottom of the tower together with insoluble components as a bottom liquid.
- a method in which a part of the tower bottom liquid discharged from the tower bottom is vaporized by a reboiler and introduced into the tower can be used.
- the distillate containing a mixed vapor of alcohol and water taken out from the top of the moromi tower 10 or the concentration stage is sent to the condenser 11 and condensed. A part of this condensate is refluxed to the mash column, and the remaining condensate is supplied to the distillation column 20.
- the alcohol concentration of the distillate supplied from the mash tower 10 to the distillation tower 20 can be controlled by changing the ratio of the condensed liquid refluxed to the mash tower 10.
- the distillate containing a mixed vapor of alcohol and water taken out from the top of the mash tower 10 or the concentration stage is not condensed and is in a gaseous state or a gas-liquid mixture. It can also be supplied to the distillation column 20 in a state.
- a part of the distillate containing a mixed vapor of alcohol and water was supplied to the distillation column 20 and the remaining distillate was condensed by a condenser. The entire amount of the condensate can be refluxed to the mash tower.
- the alcohol concentration of the distillate supplied from the mash column 10 to the distillation column 20 can be controlled by the ratio of the distillate supplied to the condenser.
- the top of the mash column 10 is used to protect the separation membrane.
- the distillate extracted from the water is partially condensed (some low-boiling components remain as vapor, and other alcohol-water mixed vapor is condensed), and low-boiling components such as aldehyde are mixed with alcohol and water. It is preferable to separate from the vapor and remove it from the system.
- the alcohol concentration of the distillate supplied from the mash column 10 to the distillation column 20 is (in order to improve the energy efficiency of the entire process from the mash column to the membrane separator, It is controlled to be less than 50% by mass, preferably 12% by mass or more and less than 50% by mass, more preferably 20% by mass or more and less than 50% by mass, and further preferably 30% by mass or more and less than 50% by mass.
- the above-mentioned role of the mash tower insoluble components such as unfermented raw material components and high-boiling components such as fusel oil are preferably added to the low-boiling side while suppressing the discharge of alcohol as much as possible.
- the role of concentrating the alcohol is excessively added, so that it is necessary to further increase the concentration stage above the supply port of the fermentation alcohol aqueous solution of the mash tower 10 Therefore, the size and complexity of the device cannot be avoided.
- the alcohol concentration of the distillate supplied to the distillation tower 20 is less than 50% by mass (which is naturally higher than the concentration of the fermentation alcohol aqueous solution), preferably 12% by mass or more and less than 50% by mass, more preferably 20% by mass or more and 50% by mass. %, More preferably 30% by mass or more and less than 50% by mass can be easily achieved with a simple apparatus having a distillation stage of several stages or less, and even if the mixed vapor of alcohol and water is condensed, This is because the rate of refluxing can be made extremely low even when refluxing, so that rapid processing becomes possible and energy consumption can be suppressed.
- the ratio of the condensate refluxed in the moromi tower is preferably 20% or less, more preferably 10% or less.
- the role of the distillation column 20 in the present invention is that the distillate from the mash column is an alcohol having an alcohol concentration of 65 to 85% by mass, preferably 65 to 78% by mass, at an operating pressure of 50 to 150 kPa, preferably atmospheric pressure. Concentrate to a vapor mixture of water and water.
- a mixed vapor of alcohol and water having an alcohol concentration of 65 to 85% by mass, preferably 65 to 78% by mass is supplied as a condensate to the evaporator 30 and is vaporized by the evaporator 30 and supplied to the membrane separation device 40. And purified to absolute alcohol.
- the alcohol concentration in the distillation tower 20 is only concentrated to less than 65% by mass, the energy consumption in the evaporator in the next process will increase, and the fermentation alcohol will be refined more easily and extremely efficiently as a whole process. Thus, it is not preferable because anhydrous alcohol cannot be obtained.
- the alcohol concentration is concentrated to more than 85% by mass (for example, close to the azeotropic composition) in the distillation column 20, the fermentation alcohol can be refined more easily and extremely efficiently as a whole process to obtain anhydrous alcohol. It is not preferable because it becomes impossible to do so.
- the distillation column 20 is not particularly limited as long as it is suitable for a normal distillation operation, such as a plate type or a packed column.
- a supply section for supplying the distillate of the mash tower or the condensate of the distillate is disposed in the middle stage of the distillation tower.
- a part of the column bottom liquid is heated by the reboiler 21 to become vapor, and rises in the column while exchanging heat and materials with the liquid flowing down in the column.
- the mixed vapor of alcohol and water distilled from the top of the column or the concentration stage has an alcohol concentration of 65% by mass or more, preferably 70% by mass or more and 85% by mass or less, preferably 80% by mass or less, more preferably. It is concentrated to 78% by mass or less and sent to the condenser.
- the bottom liquid of the distillation column 20 may contain alcohol to be recovered, and is preferably circulated and supplied to the mash column 10.
- the operating pressure of the distillation column 20 is preferably in the range of 50 to 150 kPa (absolute pressure), and is usually atmospheric pressure. If the operating pressure exceeds 150 kPa (absolute pressure), the construction cost of the distillation tower is increased, and the heating temperature is increased, resulting in an increase in energy consumption. On the other hand, if the operating pressure is less than 50 kPa (absolute pressure), the condensation temperature of the mixed vapor of alcohol and water distilled from the top of the column or the concentrating stage becomes low, which is not preferable because the energy consumption in the condenser increases.
- the reboiler 21 that heats the bottom liquid of the distillation column 20 can use the condensation heat of steam supplied from the outside, but the condensation heat of the non-permeated vapor of the membrane separation device 40 can be suitably used as preheating, for example. it can.
- the condenser 22 cools the mixed vapor of alcohol and water distilled from the top of the column or the concentration stage to form a condensate.
- the condensate may be temporarily stored in the condensate tank 23. A part of this condensate is refluxed to the top of the column or the concentration stage by, for example, a condensate pump, and the remainder is sent to the evaporator 30.
- the alcohol concentration of the mixed vapor of alcohol and water obtained at the top of the distillation column or at the concentration stage can be suitably controlled by the ratio of the condensate refluxed to the distillation column 20.
- the alcohol concentration of the mixed vapor of alcohol and water obtained at the top of the distillation column 20 or at the concentration stage is adjusted to 65 to 85 mass by adjusting the ratio of the condensate refluxed to the distillation column 20. Control to be in the range of%.
- the ratio of the condensed liquid to be refluxed is relatively low. Is preferred. Preferably it is less than 50% of the condensate, more preferably less than 35%, even more preferably less than 20%, particularly preferably less than 10%.
- the condensation heat of the condenser 22 may be used for preheating the distillate supplied to the distillation column.
- the distillate fed is preferably preheated to near its boiling point. At that time, it is preferable that the steam that cannot be condensed by the condenser 22 is condensed by cooling water by the auxiliary condenser.
- an aqueous alcohol solution having an alcohol concentration of 65 to 85% by mass is supplied from the distillation column 20 through the condenser 22 to the evaporator 30.
- the role of the evaporator 30 is to heat the alcohol aqueous solution to evaporate the whole amount and supply it to the membrane separation device 40 as a mixed vapor of alcohol and water.
- the evaporator 30 has a sufficient heating function, and the pressure of the resulting mixed alcohol and water vapor is 100 kPa (absolute pressure) or higher, preferably 120 kPa (absolute pressure) or higher, more preferably 200 kPa (absolute pressure) or higher. Those that can be operated at high pressure are preferred.
- the upper limit of the pressure is usually about 700 kPa (absolute pressure) or less.
- the total amount of the mixed steam of alcohol and water obtained in the evaporator 30 is supplied to the membrane separation device 40 and purified.
- the mixture is heated to a temperature of about 5 ° C. or higher by a superheater before being supplied to the membrane separator.
- the operating pressure of the evaporator 30 can be suitably performed by adjusting (limiting) the flow rate of the steam flowing through the non-permeating side of the membrane separation device 40.
- FIG. This makes it possible to use the non-permeate vapor of the membrane separator 40 as a heat source for the reboiler of the distillation column 20.
- a relatively low concentration aqueous alcohol solution having an alcohol concentration of 65 to 85% by mass is supplied to the evaporator.
- trace amounts of impurities such as so-called fusel oil contained in the aqueous fermentation alcohol solution may remain in the condensate supplied to the evaporator.
- the impurities may accumulate in the evaporator and cause bumping. Therefore, in the present invention, it is preferable to operate while removing part of the evaporator bottom liquid continuously or intermittently to remove accumulated impurities.
- the mixed vapor of alcohol and water flows while contacting the selectively permeable separation membrane.
- the mixed vapor having a reduced alcohol concentration mainly composed of water vapor is recovered on the permeation side of the separation membrane.
- the alcohol concentration of this mixed steam is about several to several tens of mass% (for example, 20 mass% of alcohol), but in order to increase the recovery rate of alcohol (condensed as a condensate or as a stripping vapor as it is) It is preferable to circulate and supply to the distillation column 20.
- water vapor is removed on the non-permeating side of the separation membrane, high-purity anhydrous alcohol can be recovered.
- the permeation amount of water vapor that permeates the separation membrane is proportional to the difference in the partial pressure of water vapor on both sides of the membrane. Therefore, in the present invention, a vapor mixture of alcohol and water having a relatively high pressure of 100 kPa (absolute pressure) or more, preferably about 120 to 700 kPa (absolute pressure) is generated in the evaporator 30 and supplied to the membrane separation apparatus. Is preferred. At the same time, it is also preferable to reduce the pressure on the permeate side of the separation membrane.
- the space on the permeate side of the separation membrane is connected to a vacuum pump 42 via a heat exchanger (condenser) 41 to reduce the pressure, and the permeated vapor that has permeated the separation membrane is condensed in the condenser to be condensed.
- This condensate is preferably stored in the condensate tank 43 and then circulated and supplied to the distillation column 20.
- the membrane separation device 40 is not limited as long as it can separate water vapor from the mixed vapor of water vapor and ethanol vapor with a separation membrane.
- the separation membrane is not particularly limited as long as it selectively permeates water vapor with respect to alcohol vapor. It may be made of a polymer such as polyimide, polyetherimide, polycarbonate, polysulfone or high molecular weight polyvinyl alcohol, or may be made of an inorganic material such as zeolite or zirconia.
- the form of the membrane separation device is also a hollow fiber separation membrane module made of, for example, an asymmetric polyimide hollow fiber membrane, a shell-and-tube module comprising a tubular separation membrane element in which a zeolite is formed on a porous tubular support, etc.
- the conventionally known ones can be suitably used. Examples of these include, but are not limited to, Japanese Unexamined Patent Application Publication Nos. 2000-262828 and 2001-62257 using polyimide hollow fiber membranes, and Japanese Unexamined Patent Application Publication No. 2003-93844 using zeolite membranes. Preferred examples include those described in JP-A-2006-263574, JP-A-2007-203210 and the like.
- the water vapor transmission rate (P ′ H 2 O 2 ) is preferably 0.5 ⁇ 10 ⁇ 3 cm 3 (STP) / cm 2 ⁇ sec ⁇ cm Hg or more, more preferably 1.0 in use.
- ⁇ 10 ⁇ 3 cm 3 (STP) / cm 2 ⁇ sec ⁇ cmHg or more, ratio of water vapor transmission rate (P ′ H 2 O ) to alcohol transmission rate (P ′ alcohol ) (P ′ H 2 O / P ′ alcohol ) Is preferably 50 or more, more preferably 100 or more.
- FIG. 2 shows an outline of another example of the embodiment according to the present invention.
- the bottom liquid discharged from the mash tower 10 is used for preheating the aqueous fermentation alcohol solution supplied to the mash tower 10, and the non-permeate vapor (anhydrous alcohol vapor) of the membrane separation device 40 is used as a reboiler for the distillation tower 20.
- the non-permeate vapor (anhydrous alcohol vapor) of the membrane separation device 40 is used as a reboiler for the distillation tower 20.
- Example 1 The fermented ethanol aqueous solution having an ethanol concentration of 7.3% by mass obtained in the fermenter was refined using 72.7 tons per hour using the apparatus schematically shown in FIG. 2, and 99.8% by mass absolute ethanol was purified. An attempt was made to obtain 5 tons per hour.
- Process 1 A fermented ethanol aqueous solution having an ethanol concentration of 7.3% by mass is preheated with a preheater, and is fed at a flow rate of 72.7 t / hour to a mash tower having a theoretical plate number equivalent to 5 with a liquid feed pump.
- Water vapor (steam 1) necessary for carrying out a distillation process by evaporating the supplied aqueous solution of fermentation ethanol is directly blown into the bottom of the mash column.
- the mixed vapor of ethanol and water distilled from the moromi tower and sent from the top of the tower is condensed in the condenser.
- a part of the condensate is refluxed to the mash column, and the remaining condensate is supplied to the distillation column.
- the reflux amount is adjusted so that the ethanol concentration at the top of the mash column is 39% by mass.
- the mixed vapor of ethanol and water distilled in the distillation column and sent from the top of the column is condensed in the condenser.
- a part of the condensate is refluxed to the distillation column, and the remaining condensate is supplied to the evaporator.
- the reflux amount is adjusted so that the ethanol concentration at the top of the distillation column is 70% by mass.
- the condensate supplied to the evaporator is 8.1 t per hour. (Process 3)
- the condensate to be supplied to the evaporator (ethanol aqueous solution having an ethanol concentration of 70% by mass) is heated by steam 3 and mixed with ethanol and water having an ethanol concentration of 70% by mass at a total pressure of 300 kPa (gauge pressure). Vaporized, heated to 135 ° C. by a superheater (steam 3), and supplied to the membrane separator.
- the membrane separation device is a module as described in Japanese Patent Application Laid-Open No. 2000-262838, and has a water vapor transmission rate (P ′ H2O ) at 135 ° C. of 1.2 ⁇ 10 ⁇ 3 cm 3 (STP) / cm.
- P ′ H2O water vapor transmission rate
- a module containing 27 modules made of hollow fiber separation membranes having an effective membrane area of 125 m 2 is used.
- a vacuum pump is provided on the permeate side of the membrane separation device via a condenser (condenser) so that the vapor that permeates the separation membrane is completely condensed by the condenser so that the degree of vacuum on the permeate side of the separation membrane is maintained.
- a part of the non-permeated vapor discharged from the membrane separation device is configured to be supplied to the permeation side of the membrane separation device as a purge gas for increasing the separation efficiency of the membrane separation device.
- the vapor on the permeate side of the separation membrane of the membrane separation apparatus (permeate vapor and vapor supplied as purge gas) is condensed, preheated with non-permeate vapor, and circulated and supplied to the distillation column.
- the non-permeated vapor collected from the non-permeate side of the separation membrane of the membrane separation apparatus is heat-recovered by the above preheating and then cooled to the product tank as absolute ethanol having an ethanol concentration of 99.8% by mass. Collect at 5 tons per hour.
- Example 2 and 3 The conditions shown in Table 1 were changed, and 72.7 mass% of the fermented ethanol aqueous solution was purified by 72.7 t per hour in the same manner as in Example to obtain 5 t of 99.8 mass% absolute ethanol per hour. I tried to do that. The results are shown in Table 1.
- Example 1 the distillation column and the membrane separation apparatus are simple, and the fermentation alcohol can be purified with extremely high energy efficiency.
- energy efficiency is low and a large separation membrane device is required.
- Comparative Example 2 the reflux ratio of the condensate in the distillation column is increased to reduce energy efficiency, and a large distillation column is required.
- a fermentation alcohol aqueous solution is supplied to the mash tower, and the fermentation alcohol aqueous solution in the mash tower is heated to distill a distillate containing a mixed vapor of alcohol and water.
- the first condensate obtained by condensing the product is supplied to the distillation tower, and the distillate or the first condensate supplied from the mash tower in the distillation tower is heated to produce a mixed vapor of alcohol and water from the distillation tower.
- a part of the second condensate obtained by distilling and condensing the mixed vapor is refluxed to the distillation column, and the remaining second condensate is supplied to the evaporator, and then the second condensate in the evaporator is supplied.
- Anhydrous alcohol from fermented alcohol aqueous solution In the purification treatment method for obtaining, it is possible to provide a method for more convenient and extremely energy efficient purification treatment as a whole step.
- the solid line indicates the flow of liquid or gas (vapor), and the broken line indicates the connection of the control system.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Distillation Of Fermentation Liquor, Processing Of Alcohols, Vinegar And Beer (AREA)
- Alcoholic Beverages (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
Description
1. (工程1)醗酵アルコール水溶液をもろみ塔へ供給し、もろみ塔内の醗酵アルコール水溶液を加熱してアルコールと水との混合蒸気を留出させ、この混合蒸気を含むもろみ塔の留出物、またはこの留出物を凝縮した第1の凝縮液を蒸留塔へ供給し、(工程2)前記留出物または第1の凝縮液を加熱してアルコールと水との混合蒸気を蒸留塔より留出させ、この混合蒸気を凝縮した第2の凝縮液の一部を前記蒸留塔に還流するとともに、残りの第2の凝縮液を蒸発器へ供給し、次いで、(工程3)前記蒸発器内の第2の凝縮液を加熱してアルコールと水との混合蒸気を生成し、このアルコールと水との混合蒸気を膜分離装置へ供給し、アルコールと水との混合蒸気から水蒸気を選択的に除去する、工程を有する醗酵アルコール水溶液から無水アルコールを得るための精製処理方法において、
工程1のもろみ塔により留出させるアルコールと水との混合蒸気のアルコール濃度が(当然醗酵アルコール水溶液の濃度以上であって)50質量%未満、好ましくは12質量%以上50質量%未満、より好ましくは20質量%以上50質量%未満、更に好ましくは30質量%以上50質量%未満になるように、もろみ塔を制御し、且つ、工程2の蒸留塔により留出させるアルコールと水との混合蒸気のアルコール濃度が65~85質量%、好ましくは65~78質量%となるように、蒸留塔への凝縮液の還流量を制御することを特徴とする醗酵アルコール水溶液から無水アルコールを得るための精製処理方法。
醗酵槽で得られたエタノール濃度が7.3質量%の醗酵エタノール水溶液を1時間当り72.7t、図2に概略を示した装置を用いて精製処理し、99.8質量%の無水エタノールを1時間当り5t得ることを試みた。
(工程1)
エタノール濃度が7.3質量%の醗酵エタノール水溶液を予備加熱器で予熱し、送液ポンプで理論段数が5段相当のもろみ塔へ72.7t/時間の流量で供給する。このもろみ塔の塔底には、供給された醗酵エタノール水溶液を蒸発させて蒸留処理を行うために必要な水蒸気(スチーム1)を直接吹き込む。もろみ塔内で留出させ塔頂から送出したエタノールと水との混合蒸気は凝縮器で全量凝縮する。凝縮液の一部はもろみ塔へ還流し、残りの凝縮液は蒸留塔へ供給する。この還流量は、もろみ塔の塔頂のエタノール濃度が39質量%になるように調節する。
(工程2)
送液ポンプによって、1時間当り16.4tのエタノール濃度が39質量%のエタノール水溶液を理論段数4段相当の蒸留塔へ供給する。この蒸留塔の塔底にはリボイラーが備えられ、塔底から抜き出された塔底液は、膜分離装置の非透過蒸気(無水エタノール蒸気)によって予備加熱され、さらに十分な伝熱面積と循環量を有し且つ必要量のスチーム2が供給されるリボイラーによって混合蒸気にされ蒸留塔へ循環供給する。同時に塔底から抜き出された塔底液は1時間当り8.3tの流量でもろみ塔へ循環供給する。塔底液はエタノール濃度が2.5質量%以下程度に保持する。
(工程3)
蒸発器へ供給する凝縮液(エタノール濃度が70質量%のエタノール水溶液)は、スチーム3によって加熱して、全量が300kPa(ゲージ圧)の圧力でエタノール濃度が70質量%のエタノールと水との混合蒸気とし、過熱器(スチーム3)によって135℃まで過熱して、膜分離装置へ供給する。
表1に示した条件を変更して、実施例と同様に7.3質量%の醗酵エタノール水溶液を1時間当り72.7t精製処理し、99.8質量%の無水エタノールを1時間当り5t得ることを試みた。結果を表1に示した。
表1に示した条件を変更して、実施例と同様に7.3質量%の醗酵エタノール水溶液を1時間当り72.7t精製処理し、99.8質量%の無水エタノールを1時間当り5t得ることを試みた。結果を表1に示した。
11 凝縮器
12 凝縮液槽
20 蒸留塔
21 リボイラー
22 凝縮器
23 凝縮液槽
30 蒸発器
40 膜分離装置
41 熱交換器(コンデンサー)
42 真空ポンプ
43 凝縮液槽
FIC: 流量調節器
LIC: 液面調節器
TIC: 温度調節器
PIC: 圧力調節器
Claims (5)
- (工程1)醗酵アルコール水溶液をもろみ塔へ供給し、もろみ塔内の醗酵アルコール水溶液を加熱してアルコールと水との混合蒸気を含む留出物を留出させ、この留出物、またはこの留出物を凝縮した第1の凝縮液を蒸留塔へ供給し、(工程2)前記留出物または第1の凝縮液を加熱してアルコールと水との混合蒸気を蒸留塔より留出させ、この混合蒸気を凝縮した第2の凝縮液の一部を前記蒸留塔に還流するとともに、残りの第2の凝縮液を蒸発器へ供給し、次いで、(工程3)前記蒸発器内の第2の凝縮液を加熱してアルコールと水との混合蒸気を生成し、このアルコールと水との混合蒸気を膜分離装置へ供給し、アルコールと水との混合蒸気から水蒸気を選択的に除去する、工程を有する醗酵アルコール水溶液から無水アルコールを得るための精製処理方法において、
工程1のもろみ塔により留出させるアルコールと水との混合蒸気のアルコール濃度が50質量%未満になるように、もろみ塔を制御し、且つ、工程2の蒸留塔により留出させるアルコールと水との混合蒸気のアルコール濃度が65~85質量%となるように、蒸留塔への凝縮液の還流量を制御することを特徴とする醗酵アルコール水溶液から無水アルコールを得るための精製処理方法。 - 工程1及び工程2において、もろみ塔及び蒸留塔の操作圧力がいずれも50~150kPa(絶対圧)であり、工程3において、蒸発器の操作圧力が150kPa(絶対圧)以上であることを特徴とする請求項1に記載の醗酵アルコール水溶液から無水アルコールを得るための精製処理方法。
- 工程2において、蒸留塔内のもろみ塔から供給された留出物又は第1の凝縮液を加熱してアルコールと水との混合蒸気を留出させ、この混合蒸気を凝縮した第2の凝縮液の50%未満を前記蒸留塔に還流することを特徴とする請求項1~2のいずれかに記載の醗酵アルコール水溶液から無水アルコールを得るための精製処理方法。
- 工程2の蒸留塔の塔底液が工程1のもろみ塔へ循環供給され、工程3の膜分離装置の膜透過成分が凝縮されて凝縮液として工程2の蒸留塔へ循環供給されることを特徴とする請求項1~3のいずれかに記載の醗酵アルコール水溶液から無水アルコールを得るための精製処理方法。
- 醗酵アルコール水溶液をもろみ塔へ供給する前にアルカリ成分を添加して中和処理することを特徴とする請求項1~4のいずれかに記載の醗酵アルコール水溶液から無水アルコールを得るための精製処理方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/920,039 US8129573B2 (en) | 2008-02-29 | 2009-03-02 | Method for purifying fermentation alcohol |
CN2009801151720A CN102015049B (zh) | 2008-02-29 | 2009-03-02 | 发酵酒精的纯化方法 |
BRPI0908412A BRPI0908412A2 (pt) | 2008-02-29 | 2009-03-02 | método para purificar álcool de fermentação |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-050584 | 2008-02-29 | ||
JP2008050584 | 2008-02-29 | ||
JP2008-092425 | 2008-03-31 | ||
JP2008092425 | 2008-03-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009107840A1 true WO2009107840A1 (ja) | 2009-09-03 |
Family
ID=41016221
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/053901 WO2009107840A1 (ja) | 2008-02-29 | 2009-03-02 | 醗酵アルコールの精製処理方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8129573B2 (ja) |
JP (1) | JP5369765B2 (ja) |
CN (1) | CN102015049B (ja) |
BR (1) | BRPI0908412A2 (ja) |
WO (1) | WO2009107840A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102126922A (zh) * | 2010-01-13 | 2011-07-20 | 中国石油化工集团公司 | 差压蒸馏中粗酒气的处理方法 |
CN102126921A (zh) * | 2010-01-13 | 2011-07-20 | 中国石油化工集团公司 | 制共沸乙醇的三塔加热方法 |
US9120724B2 (en) | 2011-09-09 | 2015-09-01 | Takara Shuzo Co., Ltd. | Method for producing absolute alcohol and absolute alcohol |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8053610B2 (en) * | 2008-03-31 | 2011-11-08 | Ube Industries, Ltd. | Method for purifying fermentation alcohol |
CN102180768B (zh) * | 2011-03-21 | 2013-11-20 | 安徽中粮生化燃料酒精有限公司 | 一种制备无水乙醇的方法 |
TWI622577B (zh) * | 2012-09-14 | 2018-05-01 | Technip E&C Limited | 醇類的處理 |
CN103409301B (zh) * | 2013-08-27 | 2016-02-10 | 宜宾金喜来酒业有限公司 | 一种经膜蒸馏提质的清香型白酒的基酒及其膜蒸馏方法 |
CN103409305B (zh) * | 2013-08-27 | 2016-02-10 | 宜宾金喜来酒业有限公司 | 一种经膜蒸馏提质的凤香型白酒的基酒及其膜蒸馏方法 |
CN103589620B (zh) * | 2013-11-11 | 2016-07-06 | 河南景源果业有限责任公司 | 三效蒸酒工艺 |
US10486079B1 (en) | 2016-01-08 | 2019-11-26 | Whitefox Technologies Limited | Process and system for dehydrating a byproduct stream in ethanol production |
JP2018020985A (ja) * | 2016-08-05 | 2018-02-08 | 三菱ケミカル株式会社 | アルコールの製造方法 |
US10729987B1 (en) | 2016-12-09 | 2020-08-04 | Whitefox Technologies Limited | Process and system for heat integration in ethanol production |
CN112118897B (zh) | 2018-05-07 | 2022-07-01 | 怀弗克斯技术有限公司 | 在具有分子筛和膜的乙醇生产中使产物流脱水的方法和系统 |
CN110404285A (zh) * | 2019-07-18 | 2019-11-05 | 肥城金塔酒精化工设备有限公司 | 四塔蒸馏与膜分离集成系统及其蒸馏乙醇的方法 |
CN112827204A (zh) * | 2021-02-07 | 2021-05-25 | 吉林凯莱英医药化学有限公司 | 真空提纯装置及提纯系统 |
EP4415844A1 (en) | 2021-10-15 | 2024-08-21 | Whitefox Technologies Limited | Heat integrated process and system for organic solvent production using vapor recompression |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6232871A (ja) * | 1985-08-02 | 1987-02-12 | Mitsubishi Heavy Ind Ltd | アルコ−ル生産装置 |
JPS63258602A (ja) * | 1987-04-15 | 1988-10-26 | Ube Ind Ltd | 揮発性混合物の分離方法 |
JPH02184388A (ja) * | 1989-01-12 | 1990-07-18 | Tsusho Sangiyoushiyou Kiso Sangiyoukiyokuchiyou | アルコールの濃縮精製方法及びその装置 |
JP2000342901A (ja) * | 1999-06-08 | 2000-12-12 | Tadashi Yazaki | 蒸留方法およびそれに用いる蒸留装置 |
JP2001269553A (ja) * | 2000-01-19 | 2001-10-02 | Ube Ind Ltd | ガス分離膜および分離方法 |
JP2002345495A (ja) * | 2001-05-25 | 2002-12-03 | Takara Holdings Inc | エタノールの精製方法 |
WO2004073841A1 (ja) * | 2003-02-21 | 2004-09-02 | Bussan Nanotech Research Institute, Inc. | 水溶性有機物の濃縮方法 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE60127734T2 (de) * | 2000-01-19 | 2007-12-27 | Ube Industries, Ltd., Ube | Gastrennungsmembran und seine Verwendung |
JP4414922B2 (ja) * | 2005-03-23 | 2010-02-17 | 三井造船株式会社 | 蒸留−膜分離ハイブリッド装置、および蒸留と膜分離を組み合わせた分離方法 |
-
2009
- 2009-03-02 US US12/920,039 patent/US8129573B2/en not_active Expired - Fee Related
- 2009-03-02 JP JP2009048357A patent/JP5369765B2/ja active Active
- 2009-03-02 CN CN2009801151720A patent/CN102015049B/zh not_active Expired - Fee Related
- 2009-03-02 WO PCT/JP2009/053901 patent/WO2009107840A1/ja active Application Filing
- 2009-03-02 BR BRPI0908412A patent/BRPI0908412A2/pt not_active IP Right Cessation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6232871A (ja) * | 1985-08-02 | 1987-02-12 | Mitsubishi Heavy Ind Ltd | アルコ−ル生産装置 |
JPS63258602A (ja) * | 1987-04-15 | 1988-10-26 | Ube Ind Ltd | 揮発性混合物の分離方法 |
JPH02184388A (ja) * | 1989-01-12 | 1990-07-18 | Tsusho Sangiyoushiyou Kiso Sangiyoukiyokuchiyou | アルコールの濃縮精製方法及びその装置 |
JP2000342901A (ja) * | 1999-06-08 | 2000-12-12 | Tadashi Yazaki | 蒸留方法およびそれに用いる蒸留装置 |
JP2001269553A (ja) * | 2000-01-19 | 2001-10-02 | Ube Ind Ltd | ガス分離膜および分離方法 |
JP2002345495A (ja) * | 2001-05-25 | 2002-12-03 | Takara Holdings Inc | エタノールの精製方法 |
WO2004073841A1 (ja) * | 2003-02-21 | 2004-09-02 | Bussan Nanotech Research Institute, Inc. | 水溶性有機物の濃縮方法 |
Non-Patent Citations (1)
Title |
---|
KOHEI NINOMIYA ET AL.: "Yuki Joki Dassuimaku ni yoru Alcohol Yoeki no Dassui Noshuku Genkai ni Tsuite", KAGAKU KOGAKUKAI DAI 57 NENKAI KENKYU HAPPYO KOEN YOSHISHU, 2 March 1992 (1992-03-02), pages 12 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102126922A (zh) * | 2010-01-13 | 2011-07-20 | 中国石油化工集团公司 | 差压蒸馏中粗酒气的处理方法 |
CN102126921A (zh) * | 2010-01-13 | 2011-07-20 | 中国石油化工集团公司 | 制共沸乙醇的三塔加热方法 |
US9120724B2 (en) | 2011-09-09 | 2015-09-01 | Takara Shuzo Co., Ltd. | Method for producing absolute alcohol and absolute alcohol |
Also Published As
Publication number | Publication date |
---|---|
CN102015049A (zh) | 2011-04-13 |
JP2009263335A (ja) | 2009-11-12 |
US20110009677A1 (en) | 2011-01-13 |
JP5369765B2 (ja) | 2013-12-18 |
BRPI0908412A2 (pt) | 2017-10-17 |
US8129573B2 (en) | 2012-03-06 |
CN102015049B (zh) | 2013-05-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5369765B2 (ja) | 醗酵アルコールの精製処理方法 | |
JP5593629B2 (ja) | 醗酵アルコールの精製処理方法 | |
WO2009123223A1 (ja) | 醗酵アルコールの精製処理方法 | |
US9266803B2 (en) | Liquid separation by membrane assisted vapor stripping process | |
EP1614458B1 (en) | Method for concentrating water-soluble organic material | |
JP4414922B2 (ja) | 蒸留−膜分離ハイブリッド装置、および蒸留と膜分離を組み合わせた分離方法 | |
JP6196807B2 (ja) | 水溶性有機物の濃縮方法及び水溶性有機物の濃縮装置 | |
EP1888194B1 (en) | New stripper configuration for the production of ethylene oxide | |
JP4831934B2 (ja) | 水溶性有機物濃縮装置 | |
US20170203230A1 (en) | System for the Purification of an Organic Solvent and a Process for the use Thereof | |
JP2007275690A (ja) | 有機液体水溶液からの有機液体分離回収方法 | |
JPH0463110A (ja) | アルコール含有反応液の分離精製法 | |
JP2020075864A (ja) | アルコールの製造方法 | |
JP4360194B2 (ja) | 水溶性有機物の濃縮方法及び濃縮装置 | |
KR101330035B1 (ko) | 정제 알코올 증류 시스템 | |
JP2780323B2 (ja) | 揮発性有機液体水溶液の濃縮液製造方法 | |
JP2532042B2 (ja) | 有機酸の回収方法 | |
JPH02253802A (ja) | 低沸点溶剤水溶液の脱水分離において蒸留と膜分離の組合せによる熱量節減方法 | |
KR20180018955A (ko) | 아세트산 정제 공정 및 장치 | |
JPH025441B2 (ja) | ||
JPH0533978B2 (ja) | ||
JPH04300843A (ja) | アルコールの脱水濃縮方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200980115172.0 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09715626 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12920039 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 09715626 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: PI0908412 Country of ref document: BR Kind code of ref document: A2 Effective date: 20100830 |