EP4341242A1 - Procédé de fabrication de la méthionine - Google Patents
Procédé de fabrication de la méthionineInfo
- Publication number
- EP4341242A1 EP4341242A1 EP22732284.9A EP22732284A EP4341242A1 EP 4341242 A1 EP4341242 A1 EP 4341242A1 EP 22732284 A EP22732284 A EP 22732284A EP 4341242 A1 EP4341242 A1 EP 4341242A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- methionine
- hydantoin
- column
- reactive stripping
- salt
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C319/00—Preparation of thiols, sulfides, hydropolysulfides or polysulfides
- C07C319/14—Preparation of thiols, sulfides, hydropolysulfides or polysulfides of sulfides
- C07C319/20—Preparation of thiols, sulfides, hydropolysulfides or polysulfides of sulfides by reactions not involving the formation of sulfide groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C323/00—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups
- C07C323/50—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton
- C07C323/51—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton
- C07C323/57—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being further substituted by nitrogen atoms, not being part of nitro or nitroso groups
- C07C323/58—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being further substituted by nitrogen atoms, not being part of nitro or nitroso groups with amino groups bound to the carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C391/00—Compounds containing selenium
Definitions
- TITLE PROCESS FOR MANUFACTURING METHIONINE
- the invention relates to an improvement in a process for the manufacture of methionine, in salt or free form, or its selenium analogue (selenomethionine) in salt or free form, from the precursors 5-(2- methylmercaptoethyl)hydantoin for methionine and 5-(2-methylselenoethyl)hydantoin for selenomethionine.
- methionine can be carried out by various processes involving various synthetic intermediates, and in particular 5-(2-methylmercaptoethyljhydantoin.
- This compound corresponds to the following formula (1):
- 5-(2-Methylmercaptoethyl)hydantoin can be hydrolyzed in an alkaline medium to obtain a methionine salt which is then neutralized to methionine, if necessary.
- a process for the continuous manufacture of a methionine salt comprising the alkaline hydrolysis of 5-(2-methylmercaptoethyljhydantoin to methionine salt, carried out in a reaction rectification column at trays, preferably perforated trays.
- the latter must satisfy characteristics of number of trays, weir height, space between trays, diameter of the column compared to the length of the weir and the ratio of the cross section of the column in relation to the gas flow surface, which have been determined very precisely, having the advantage of minimizing the formation of by-products such as methionine dipeptides.
- An aqueous solution of hydantoin is introduced at the level of the upper plate of the column and an alkaline solution based on alkali metal carbonate is fed to the level of a plate under the upper plate of the column.
- the heat required for the reaction is provided by a stream of steam supplied to the bottom of the column.
- the present invention provides a process for the alkaline hydrolysis of methionine hydantoin using reactive stripping technology to overcome these obstacles. To this end, the reaction is carried out, completely or partially, in a packed reaction stripping column.
- the invention relates to a process for the alkaline hydrolysis of 5-(2-methylmercaptoethyl)hydantoin of formula (1)
- the aforementioned alkaline hydrolysis process is carried out in a basic aqueous medium, first in a reactive stripping column with packing, then in at least one reactor, identical or different from said reactive stripping column with filling.
- 5-(2-Methylmercaptoethyl)hydantoin, or methionine hydantoin may be in the form of a salt. It can be in the pure state or in a mixture.
- a mixture may comprise one or more precursors for the manufacture of methionine, which will generally be the case when the invention is part of a process for the manufacture of methionine on an industrial scale; methionine or a methionine salt, in particular when the hydrolysis of methionine hydantoin has already started; secondary products; as well as impurities.
- this definition applies identically to 5-(2-methylselenoethyl)hydantoin, as well as the entire description of the present text.
- reactive stripping or reactive stripping, or reactive distillation, or reactive rectification
- the course of the reaction namely the alkaline hydrolysis of hydantoin to methionine salt (or selenomethionine salt ) in the liquid phase and the separation from this phase of at least part of the gases produced, within the same column, called a reactive stripping column, or reactive stripping, or reactive distillation, or reactive rectification which is a well-documented technology belonging to the general knowledge of a person skilled in the art.
- the alkaline hydrolysis of methionine hydantoin is a reaction well known to those skilled in the art and, by basic or alkaline medium, is meant a medium whose pH makes it possible to hydrolyze the hydantoin into the salt of methionine; it is preferably at least 8, preferably at least 9; it can reach 13; even if it can vary with the evolution of the reaction, it is ideally maintained at this value of 8 at least.
- the present invention is described below in more detail, as well as preferred variants for implementing it and particular modes illustrated in the following figures 1, 2, 3 and 5, figure 4 illustrating a known method of the state of the technique and provided for comparison:
- FIG. 1 represents an implementation of the process of the invention in a reactive stripping column with packing then in a reactor consisting of a reactive stripping column with plates.
- FIG. 2 represents an implementation of the process of the invention in a single and same column, comprising first a first section of reactive stripping column with packing then a second section of reactive stripping column with plates.
- FIG. 3 shows an implementation of the process of the invention first in a packed reactive stripping column and then in a CSTR reactor.
- FIG. 4 represents an implementation of a hydrolysis process in a reactive tray stripping column according to an embodiment outside the invention, for comparison.
- FIG. 5 represents an implementation of the process of the invention in a reactive stripping column with plates then in a reactive stripping column with packing.
- the alkaline hydrolysis of hydantoin is carried out in a packed reactive stripping column.
- any type of packed reactive stripping column can be used.
- the filling can be ordered, also called structured, or in bulk.
- the packing consists of elements made of one or more materials capable of withstanding the reaction conditions.
- they are chosen from stainless and corrosion-resistant metals and metal alloys such as zirconium, tantalum, titanium, stainless steels, Hastelloy® alloys; plastics such as; fluoropolymers such as polytetrafluoroethylenes (PTFE), perfluoroalkoxy (PFA); the ceramics.
- stainless and corrosion-resistant metals and metal alloys such as zirconium, tantalum, titanium, stainless steels, Hastelloy® alloys
- plastics such as; fluoropolymers such as polytetrafluoroethylenes (PTFE), perfluoroalkoxy (PFA); the ceramics.
- PTFE polytetrafluoroethylenes
- PFA perfluoroalkoxy
- the column packing can consist of a succession of at least two different packings. They can be different in their arrangement, structured and/or loose, and/or in the nature of their elements.
- the packed reactive stripping column is conventionally equipped with an inlet at the bottom of the column of a hot gas of the steam type which moves in the upward direction.
- a hot gas of the steam type which moves in the upward direction.
- it may be provided, in its lower part, with a heating means and with at least one inlet of an inert gas, such as nitrogen, which is brought to the required temperature by said heating means and rises in the column.
- an inert gas such as nitrogen
- the column can be equipped with any means favoring an optimal distribution of the flows over all the packing elements in order to optimize the residence time of the basic aqueous medium in the column containing the hydantoin while allowing rapid evacuation of the gases formed.
- These means may consist of distributors and collectors, which are means conventionally employed in distillation technology. It may also be provided with any other known means facilitating the implementation of the reaction.
- the alkaline hydrolysis of hydantoin is not completely or almost completely completed in a so-called packed reactive stripping column, that is to say when it is only partially carried out in said column, the the alkaline hydrolysis can then be continued in one or more reactors.
- the reactor(s) can be chosen from reactive stripping columns, for example from any type of reactive stripping column with plates, with packing, with bubbles.
- the reactor(s) can also be chosen from continuous stirred tank reactors (CSTR for Continuous Stirred Tank Reactor) and piston reactors (PFR for Plug Flow Reactor). They are preferably chosen from reactors suitable for continuous processes, such as plug-flow reactors.
- CSTR Continuous Stirred Tank Reactor
- PFR Plug Flow Reactor
- reactors When several reactors are used, they can be identical or different.
- reactors we understand for example reactors chosen from reactive stripping columns, whose fillings are different in terms of nature (with packing, with plates, with bubbles, etc.), in terms of materials, etc.
- at least one reactor is chosen from reactive stripping columns and the other is chosen from CSTR or PFR reactors, or else that the reactors are chosen from CSTR or PFR reactors.
- the process can be completed by any finishing step of the reaction in one or more additional columns.
- the basic aqueous medium comprises an alkaline hydrolysis reagent which is preferably an alkali metal salt. It is advantageously chosen from alkali metal carbonates, alkali metal hydroxides and any mixture of said carbonates and hydroxides, and better still from potassium carbonate, potassium hydrogen carbonate, sodium hydroxide, potassium hydroxide and their mixtures.
- the process of the invention is applied to 5-(2-methylmercaptoethyl)hydantoin which is supplied in the form of a stream containing only hydantoin, but which may also comprise one or more compounds chosen from precursors of 5-(2-methylmercaptoethyl)hydantoin, methionine, salts and peptides, especially methionine dipeptides and derivatives, such as methionine hydantoate salts, 2-amino-4-methylthio-butyramide, 4 -methylthio-2-ureido-butyramide, formate salts, 2-hydroxy-4-methylthio-butyrate salts, and impurities.
- the process is carried out at a temperature of 160 to 200°C, preferably of 170 to 190°C.
- the temperatures in said column and in the reactor or reactors may be identical or different.
- the reaction does not occur or is insufficient.
- the methionine salt selectivity decreases, in particular methionine dipeptides are formed in unacceptable quantities.
- the method is carried out at a pressure of 7 to 15 bars, preferably 8 to 12 bars.
- the pressures in said column and in the reactor or reactors may be identical or different.
- a main advantage of the invention is to overcome the drawbacks associated with the speed of the hydrolysis reaction and to optimize its yield and its selectivity for methionine salt (or selenomethionine salt).
- the residence time of the liquid reaction stream in the packed reactive stripping column is preferably at least 1 minute, preferably of the order of 1 to 3 minutes.
- the residence time of the liquid reaction stream in the sum of the reactive stripping column with packing and the reactor or reactors can vary from 6 to 10 minutes.
- the method of the invention is suitable for a continuous mode or not.
- it is implemented continuously.
- Figures 1 to 3 and 5 exemplify variants of the invention.
- an aqueous solution of hydantoin, as well as an aqueous solution of potassium carbonate are fed to the top of a reactive stripping column with packing, and a stream of steam is supplied by an inlet at the bottom of the column and circulates against the current of the hydantoin solution.
- Carbon dioxide and ammonia gases are discharged from the top of said column.
- the reaction stream resulting from passing through the packing column is extracted at the bottom of the column to feed a reactive stripping column with trays from the top and in which a steam flow circulates countercurrently.
- An aqueous stream of methionine salt is recovered at the bottom of this column.
- the process is carried out in a reactive stripping column equipped with packing in its upper part and plates in its lower part.
- An aqueous solution of hydantoin and an aqueous solution of potassium carbonate are fed to the top of the reactive stripping column, and a stream of water vapor is supplied from an inlet at the bottom of the reactive stripping column and circulates against -flow of the hydantoin solution over the entire length of the column.
- Carbon dioxide gases and of ammonia are evacuated from the top of the column and an aqueous stream of methionine salt is recovered from the bottom of the column.
- an aqueous solution of hydantoin, together with an aqueous solution of potassium carbonate are fed to the top of a packed reactive stripping column, and a stream of steam is supplied through an inlet at the bottom of the column and circulates against the current of the hydantoin solution.
- Carbon dioxide and ammonia gases are discharged from the top of said column.
- the reaction flow resulting from passing through the packing column is extracted at the bottom of the column to feed a CSTR-type reactor which also includes a steam inlet.
- An aqueous stream of methionine salt is recovered from this reactor.
- the invention also relates to a process for the manufacture of methionine or selenomethionine, from 5-(2-methylmercaptoethyl)hydantoin, or its selenium equivalent, 5-(2-methylselenoethyl)hydantoin, respectively, comprising the hydrolysis process as described above.
- this manufacturing process will comprise the neutralization of the methionine salt to methionine and of the selenomethionine salt to selenomethionine.
- This neutralization is well known, it is advantageously carried out in the presence of CO2.
- the alkaline hydrolysis process alone or integrated into a methionine or selenomethionine manufacturing process can be supplemented by any system for recycling and/or recovering gas or heat for reuse in the process or for another recovery.
- the experimental part set out below compares a process for the alkaline hydrolysis of hydantoin of formula (1) carried out in a basic medium in a reactive stripping column with plates as known from the state of the art according to Example 1 , and in a reactive stripping column equipped with a structured packing on the upper section of the column and trays on the lower section in accordance with the invention according to Example 2, under the same conditions.
- Example 1 Reactive stripping column with trays
- This example was carried out on a reactive stripping pilot column, with a total height of 6 m, and a diameter of DN 50.
- the column was fed continuously, at the head of the column, with 12 kg/h of an aqueous solution at 180° C., this flow rate corresponding to a residence time of the liquid phase of 10 min.
- the aqueous feed solution consisted of: 19.3% (w/w) 5-(2-methylmercaptoethyl)hydantoin + precursors
- the stripping was carried out by injecting 2 kg/h of steam at 190°C.
- the column was operated at a pressure of 10.5 barg, with a temperature profile ranging from 180°C at the top to 190°C at the bottom of the column.
- composition of the liquid reaction mixture obtained at the bottom of the column in steady state was as follows:
- This example was carried out on a reactive stripping pilot column with a total height of 6 m and a diameter of DN 50.
- the column was fed continuously, at the head of the column, with 12 kg/h of an aqueous solution at 180° C., this flow rate corresponding to a total residence time of the liquid phase of 10 min, including 2 min of dwell time in the packing section and 8 min dwell time in the tray section.
- the aqueous feed solution consisted of:
- the stripping was carried out by injecting 2 kg/h of steam at 190°C.
- the column was operated at a pressure of 10.5 barg, with a temperature profile ranging from 180°C at the top to 190°C at the bottom of the column.
- composition of the liquid reaction mixture obtained at the bottom of the column in steady state was as follows:
- Example 2 Compared to Example 1, an increase in the conversion of hydantoin, an increase in the selectivity for methionine salt and a decrease in the selectivity for methionine dipeptides are observed in Example 2 according to the invention. On an industrial scale, these variations are of considerable interest.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2105274A FR3123068B1 (fr) | 2021-05-20 | 2021-05-20 | Procede de fabrication de la methionine |
| PCT/FR2022/050958 WO2022243642A1 (fr) | 2021-05-20 | 2022-05-20 | Procédé de fabrication de la méthionine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4341242A1 true EP4341242A1 (fr) | 2024-03-27 |
Family
ID=76807793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22732284.9A Pending EP4341242A1 (fr) | 2021-05-20 | 2022-05-20 | Procédé de fabrication de la méthionine |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20240217925A1 (fr) |
| EP (1) | EP4341242A1 (fr) |
| KR (1) | KR20240010712A (fr) |
| CN (1) | CN117377654A (fr) |
| FR (1) | FR3123068B1 (fr) |
| WO (1) | WO2022243642A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116102475B (zh) * | 2023-01-03 | 2025-08-29 | 万华化学集团股份有限公司 | 一种蛋氨酸组合物及其制备方法 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2155969C (fr) * | 1993-02-17 | 2002-12-17 | Shiyi Jin | Procede a etages multiples de separation reactive en suspension et appareil connexe |
| DE19547236A1 (de) | 1995-12-18 | 1997-07-03 | Degussa | Verfahren zur Herstellung von D,L-Methionin oder dessen Salz |
| US7652167B2 (en) * | 2004-07-19 | 2010-01-26 | Board Of Trustees Of Michigan State University | Process for production of organic acid esters |
| JP4792754B2 (ja) * | 2005-01-31 | 2011-10-12 | 住友化学株式会社 | アンモニウム塩を含有する溶液からアンモニアを除去する方法 |
| MX2014002250A (es) | 2011-08-30 | 2014-04-25 | Evonik Degussa Gmbh | Metodo para producir una sal de metionina. |
-
2021
- 2021-05-20 FR FR2105274A patent/FR3123068B1/fr active Active
-
2022
- 2022-05-20 US US18/289,196 patent/US20240217925A1/en active Pending
- 2022-05-20 CN CN202280035221.5A patent/CN117377654A/zh active Pending
- 2022-05-20 KR KR1020237038213A patent/KR20240010712A/ko active Pending
- 2022-05-20 WO PCT/FR2022/050958 patent/WO2022243642A1/fr not_active Ceased
- 2022-05-20 EP EP22732284.9A patent/EP4341242A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3123068A1 (fr) | 2022-11-25 |
| US20240217925A1 (en) | 2024-07-04 |
| WO2022243642A1 (fr) | 2022-11-24 |
| CN117377654A (zh) | 2024-01-09 |
| KR20240010712A (ko) | 2024-01-24 |
| FR3123068B1 (fr) | 2024-05-10 |
| TW202313565A (zh) | 2023-04-01 |
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