EP4444706A1 - Procédé de production de tétrahydrothiophène - Google Patents
Procédé de production de tétrahydrothiophèneInfo
- Publication number
- EP4444706A1 EP4444706A1 EP22835096.3A EP22835096A EP4444706A1 EP 4444706 A1 EP4444706 A1 EP 4444706A1 EP 22835096 A EP22835096 A EP 22835096A EP 4444706 A1 EP4444706 A1 EP 4444706A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- catalyst
- tetrahydrothiophene
- reaction
- alumina
- temperature
- 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
- C07D—HETEROCYCLIC COMPOUNDS
- C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
- C07D333/02—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings
- C07D333/04—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom
- C07D333/06—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to the ring carbon atoms
- C07D333/08—Hydrogen atoms or radicals containing only hydrogen and carbon atoms
Definitions
- the present invention relates to a process for the production of tetrahydrothiophene leading to an improved yield.
- the second step is the transformation of THF, in the presence of H2S, into THT according to the following reaction:
- this synthesis can generate degradation products, such as CO2, ethylene and C1 to C4 mercaptans.
- An object of the present invention is to provide a process for the preparation of more efficient tetrahydrothiophene.
- the present inventors have surprisingly discovered that the choice of a particular catalyst associated with a particular temperature range makes it possible to significantly increase the yield of the reaction.
- the choice of the catalyst makes it possible to significantly lower the temperature of the reaction, allowing an energy saving. Moreover, the choice of this catalyst makes it possible to increase the yield of the reaction.
- the tetrahydrothiophene production process according to the invention is therefore more economical, has better performance, while being more environmentally friendly.
- the present invention relates to a process for producing tetrahydrothiophene comprising a step of reacting 1, 4-butanediol or tetrahydrofuran, in the presence of hydrogen sulphide (H2S), and optionally carbon dioxide in gas phase, at a temperature between 200 and 320° C., in the presence of alumina as catalyst comprising a sodium oxide content of less than 0.3% by weight relative to the total weight of the catalyst.
- H2S hydrogen sulphide
- the method according to the invention comprises a step of reacting 1,4-butanediol or tetrahydrofuran, in the presence of hydrogen sulphide (H2S), and optionally carbon dioxide in the gas phase, at a temperature between 200 and 320° C., in the presence of alumina as catalyst comprising a sodium oxide content of less than 0.3% by weight relative to the total weight of the catalyst.
- H2S hydrogen sulphide
- gas streams of hydrogen sulphide and 1,4-butanediol or tetrahydrofuran, each in gaseous form, are introduced into a reactor.
- These reagents can arrive in the reactor via the same flow or else separately.
- the reactants arrive via the same flow, the flow of hydrogen sulphide being heated beforehand and allowing the liquid flow of 1,4-butanediol or tetrahydrofuran to be vaporized.
- 1,4-butanediol is used as reagent.
- the reaction takes place in the gas phase and preferably continuously.
- the Catalyst can be in a fixed bed in a multitubular reactor or not, isothermal or adiabatic, with plates.
- a multizone reactor or several reactors in series with identical or different catalysts with multi-injection of BDO or THF, or not, can also be used.
- the catalyst used is preferably an alumina having a sodium oxide content of between 0% and 0.1% by weight, preferably between 0 and 0.08% and more particularly between 0.03% and 0, 08% by weight relative to the total weight of the catalyst.
- the catalyst may comprise a maximum content of alkaline oxides and alkaline-earth oxides of less than 0.3% by weight relative to the total weight of the catalyst.
- the catalyst used is an undoped alumina. It is a pure alumina.
- the sodium oxide content of less than 0.3% by weight relative to the total weight of the catalyst takes into account the sodium oxide, which comes from the alumina preparation process.
- it is not modified before its introduction into the reactor. In particular, it does not undergo any surface treatment.
- the alumina may include sodium oxide, but in a content of less than 0.3% by weight relative to the total weight of the catalyst.
- the catalyst can be dried using an inert gas, such as nitrogen, when it is placed in the reactor.
- an inert gas such as nitrogen
- the reactants are introduced into the reactor sequentially.
- Hydrogen sulfide can be introduced into the reactor first, and 1,4-butanediol or tetrahydrofuran can be introduced second.
- the catalyst is placed in the reactor, then dried, then the hydrogen sulphide is introduced first, then the 1,4-butanediol or tetrahydrofuran is introduced second into the reactor.
- the reaction is advantageously carried out at a temperature between 220 and 320°C, preferably between 220 and 280°C. It is preferably carried out under a pressure of between 1 and 100 bars, preferably between 1 and 50 bars.
- the molar ratio of hydrogen sulphide relative to 1,4-butanediol is between 0.1 and 100, preferably between 0, 1 and 50, more preferably between 0.5 and 10.
- the molar ratio of hydrogen sulphide relative to tetrahydrofuran is between 0.1 and 100, preferably between 0.1 and 50, even more preferably between 0.5 and 10.
- the reaction is carried out lised in the presence of carbon dioxide in the gas phase, at a temperature between 220 and 280°C.
- the method according to the invention may comprise the following successive steps: b) condensation of the flow resulting from the reaction step defined above to obtain a flow rich in tetrahydrothiophene and gaseous vents containing the incondensables possibly formed at the outcome of the previous step; c) at least one stage of purification, preferably by decantation, of the flow rich in tetrahydrothiophene resulting from the preceding stage with separation of the aqueous phase, the organic phase and the gaseous vents; d) optionally at least one distillation of the organic phase from the previous step to isolate the tetrahydrothiophene from the gaseous vents; e) recovery of the tetrahydrothiophene isolated in the preceding steps c) and optionally d), steps b) and c) possibly being successive or simultaneous.
- the method may include intermediate purification steps.
- Example 1 Production of THT from BDO and acid gas (H2S/CO2)
- a tubular steel catalytic reactor 70 ml (49 g) of a catalyst consisting of an alumina containing 700 ppm of Na2O were introduced.
- the catalyst tested here is Spheralite 505® from Axens.
- the height of the catalytic bed is 15 cm.
- This reactor was fed with 43 g/h of BDO, 31.1 g/h of h ⁇ S and 32.9 g/h of CO2.
- the pressure in the reactor is kept constant at 3 bars absolute.
- the average temperature of the catalytic bed is 225°C.
- Example 2 Production of THT from BDO and pure H2S
- a tubular steel catalytic reactor In a tubular steel catalytic reactor, were introduced 70 ml (49 g) a catalyst consisting of an alumina containing 700 ppm of Na2O.
- the catalyst tested here is Spheralite 505® from Axens.
- the height of the catalytic bed is 15 cm.
- This reactor is fed with 43 g/h of BDO and 31.1 g/h of h ⁇ S
- the pressure in the reactor is kept constant at 3 bars absolute.
- the average temperature of the catalytic bed is 280°C.
- a tubular steel catalytic reactor 70 ml (52 g) of a catalyst consisting of an alumina containing 4000 ppm of Na2O are introduced.
- the catalyst tested here is Alumina A 2-5 from Axens.
- the height of the catalytic bed is 15 cm.
- This reactor is fed with 43 g/h of BDO, 31.1 g/h of H2S and 32.9 g/h of CO2.
- the pressure in the reactor is kept constant at 3 bar absolute.
- the average temperature of the catalytic bed is 220°C.
- Example 4 Production of THT from BDO and pure H2S
- a tubular steel catalytic reactor 70 ml (49 g) of a catalyst consisting of an alumina containing 700 ppm of Na2O were introduced.
- the catalyst tested here is Spheralite 505® from Axens.
- the height of the catalytic bed is 15 cm.
- This reactor is fed with 43 g/h of BDO and 31.1 g/h of H2S
- the pressure in the reactor is kept constant at 3 bars absolute.
- the average temperature of the catalytic bed is 280°C.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2112997A FR3129941B1 (fr) | 2021-12-06 | 2021-12-06 | Procédé de production de tétrahydrothiophène |
| PCT/FR2022/052248 WO2023105153A1 (fr) | 2021-12-06 | 2022-12-05 | Procédé de production de tétrahydrothiophène |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4444706A1 true EP4444706A1 (fr) | 2024-10-16 |
Family
ID=80122434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22835096.3A Pending EP4444706A1 (fr) | 2021-12-06 | 2022-12-05 | Procédé de production de tétrahydrothiophène |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4444706A1 (fr) |
| CN (1) | CN118355003A (fr) |
| FR (1) | FR3129941B1 (fr) |
| WO (1) | WO2023105153A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117263904A (zh) * | 2023-08-29 | 2023-12-22 | 中海油天津化工研究设计院有限公司 | 一种四氢噻吩的制备方法 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE370076B (fr) * | 1969-07-18 | 1974-09-30 | Glanzstoff Ag |
-
2021
- 2021-12-06 FR FR2112997A patent/FR3129941B1/fr active Active
-
2022
- 2022-12-05 WO PCT/FR2022/052248 patent/WO2023105153A1/fr not_active Ceased
- 2022-12-05 CN CN202280080367.1A patent/CN118355003A/zh active Pending
- 2022-12-05 EP EP22835096.3A patent/EP4444706A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3129941A1 (fr) | 2023-06-09 |
| FR3129941B1 (fr) | 2024-10-11 |
| CN118355003A (zh) | 2024-07-16 |
| WO2023105153A1 (fr) | 2023-06-15 |
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