WO1998018746A1 - Procede de preparation de la trimethylbenzoquinone - Google Patents
Procede de preparation de la trimethylbenzoquinone Download PDFInfo
- Publication number
- WO1998018746A1 WO1998018746A1 PCT/FR1996/001689 FR9601689W WO9818746A1 WO 1998018746 A1 WO1998018746 A1 WO 1998018746A1 FR 9601689 W FR9601689 W FR 9601689W WO 9818746 A1 WO9818746 A1 WO 9818746A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- process according
- solvent
- water
- tmbq
- hpa
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C46/00—Preparation of quinones
- C07C46/02—Preparation of quinones by oxidation giving rise to quinoid structures
- C07C46/06—Preparation of quinones by oxidation giving rise to quinoid structures of at least one hydroxy group on a six-membered aromatic ring
- C07C46/08—Preparation of quinones by oxidation giving rise to quinoid structures of at least one hydroxy group on a six-membered aromatic ring with molecular oxygen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/14—Phosphorus; Compounds thereof
- B01J27/186—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J27/188—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with chromium, molybdenum, tungsten or polonium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/14—Phosphorus; Compounds thereof
- B01J27/186—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J27/195—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with vanadium, niobium or tantalum
- B01J27/198—Vanadium
- B01J27/199—Vanadium with chromium, molybdenum, tungsten or polonium
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C46/00—Preparation of quinones
- C07C46/02—Preparation of quinones by oxidation giving rise to quinoid structures
- C07C46/06—Preparation of quinones by oxidation giving rise to quinoid structures of at least one hydroxy group on a six-membered aromatic ring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
Definitions
- the present invention relates to a new process for the preparation of trimethyl hydroquinone (TMHQ) by oxidation of trimethylphenol (TMP). It relates more particularly to a process for the oxidation of trimethylphenol by a catalytic system consisting of heteropolyacids.
- the TMP is oxidized by oxygen-enriched air, the reaction being catalyzed by copper salts in a three-phase gas / alcohol / water system.
- the melted TMP is poured continuously.
- the catalyst in the aqueous phase is recycled and the TMBQ in the alcoholic phase is isolated after various treatments. This process makes it possible to obtain a TMP conversion rate of 100% and a yield in TMBQ of 95%.
- heteropolyacid By heteropolyacid (HPA) is meant the acid form of a heteropolyanion.
- heteropolyacids heteropolyanion or one of its salts.
- the HPAs or their salts consist of a heteropolyanion, counterions (H + ions or metal cation) and molecules of water of crystallization.
- the structure most frequently described in the literature is the KEGGIN structure for which the metal atom / hetero atom ratio is 12/1.
- 2-n M 'n ° 40 (8 "p + n)" are said to be mixed, they are denoted HPA-n.
- the metal atom / hetero atom ratio is 9/1.
- This structure consists of two XP + Mo fragments ⁇ ' P) " linked.
- the heteropolyanions are synthesized in an acid medium by condensation of metal oxides and of oxoanions containing the heteroatom X.
- the decavanadic acid solution is gradually added to a mixture of dilute MO3 and H3PO4, brought to the boil. Stirring and boiling are continued until the M0O3 is completely dissolved, then filtered. The filtrate is recovered, that is to say an aqueous solution of HPA-n.
- HPA-n ' with 1 ⁇ n' ⁇ 4 in place of M0O3.
- H3PO4 and the HPA-n 'solution are mixed and brought to the boil before slowly adding the decavanadic acid solution. Filtered after evaporation of water, the residue is dissolved in a 5% solution of hydrogen peroxide and added to the filtrate.
- HPAs are used both in homogeneous catalysis and in heterogeneous catalysis. They can be used supported on silica, activated carbon, ion exchange resin. With regard to the main applications of HPAs in acid catalysis, mention may be made of condensations, hydrations and dehydrations, esterifications and etherifications, nitrations, reactions on epoxides, acetolyses, carbonylations, isomerizations, oligomerizations , alkylations, dealkylations and transalkylations of phenol.
- HPAs are molybdovanadophosphoric acids for their high oxidation potential and their good thermal stability. These HPA-n catalyze both organic and inorganic oxidation reactions. The oxidant of the reaction can then be O2 or H2O2.
- the main applications in redox catalysis are the oxidation of alkanes (production of maleic anhydride, oxidation of cycloalkanes into alcohols and ketones, oxidative dehydrogenation, oxidation of methane ...), alkenes, alcohols (primary ... secondary ... ), aldehydes, inorganic substances (N2H4, NO, H2S ).
- the present invention has achieved this objective. It relates to a process for preparing trimethylhydroquinone by oxidation of ⁇ -imethylphenol in the presence of an oxidizing agent chosen from oxygen and hydrogen peroxide and a heteropolyacid, the reaction being characterized by the fact that it is carried out in medium biphasic liquid.
- the trimethylphenol is preferably 2, 3, 6-trimethylphenol and the trimethylhydroquinone obtained is in particular 2, 3, 5-thmethyl hydroquinone.
- heteropolyacid is preferably chosen from heteropolyacids of Keggin structure or heteropolyacids of Dawson structure, it is understood that the salts of heteropolyacids are also usable in the context of the present invention.
- the reaction medium consists of an aqueous mixture consisting of water and organic carboxylic acid containing 2 to 6 mono or diacid carbon atoms and preferably acetic acid.
- a volume ratio between organic acid and water between 95/5 and 20/80, it is particularly preferred to use a volume ratio between 80/20 and 60/40.
- the water-immiscible solvent which makes it possible to obtain the two-phase system with the aqueous phase is chosen from aliphatic or aromatic hydrocarbons as well as from their halogenated and preferably chlorinated derivatives. It is particularly preferred to use ortho dichlorobenzene.
- the volume ratio between the solvent and the aqueous system is preferably between 30/70 and 90/10 and even more preferably between 30/70 and 50/50.
- the molar ratio between trimethylphenol and the heteropolyacid is preferably between 200/1 and 5/1 and even more preferably around 10/1.
- the weight ratio between the HPA and TMP assembly relative to the liquid medium consisting of the solvent and the aqueous medium is preferably between 0.1% and 15% and even more preferably around 6%.
- reaction conditions it is preferable to operate at a temperature above 30 ° C. and preferably between 50 and 70 ° C.
- the oxygen pressure is preferably between 0.2 and 1 bar.
- decantation of the reaction medium is carried out to separate the solvent containing TMBQ from the aqueous phase containing HPA.
- the organic phase is then dehydrated, the solvent is distilled and then recycled for a new oxidation step and the TMBQ is distilled.
- the aqueous phase is optionally treated with ortho dichloro benzene to remove the TMBQ dissolved then possibly concentrated before being recycled to the oxidation stage.
- the reactions were carried out in a 250 ml quatricol flask equipped with a condenser, a frit and mechanical stirring.
- the reaction medium was heated using a thermostatically controlled bath.
- the oxygen pressure of 1 atmosphere above the reaction medium was obtained by circulation of pure oxygen in the reactor.
- a flow meter was used to adjust the oxygen circulation rate.
- the TMP dissolved in the organic solvent, was introduced dropwise into the reaction medium using a syringe and a syringe pump.
- the speed of the syringe pump being adjustable, the casting speed could be fixed.
- TMP 3g of TMP was loaded into the reactor in molten form, that is to say after having been heated to 70 ° C. in the oven. 15 ml of aqueous solution of HPA (H7PMo8V4O40) at 0.15 mol / l, and 55 ml of acetic acid and then 50 ml of orthodichlorobenzene were added.
- HPA H7PMo8V4O40
- the agitation and the circulation of oxygen were started.
- the reaction medium was placed in the water bath at 50 ° C.
- reaction mixture was emptied into a separatory funnel, the reactor rinsed with 30 ml of orthodichlorobenzene.
- the recovered aqueous phase was washed twice with 30 ml of orthodichlorobenzene to extract the TMBQ solubilized in the catalyst foot. All the phases were recovered, weighed and measured the volume of each of them.
- the TMBQ and catalytic foot recovery treatments are identical to the BATCH process.
- the main impurity is hexamethyldiphenol (HMDP) well known as a reaction product as well as unmeasured heavy. The results are essentially the same in BATCH and SEMICONTINUOUS.
- the aqueous phase containing the catalyst obtained at the end of the first catalytic cycle described in the preceding paragraph was evaporated on a rotary evaporator until a blackish oil is obtained. It was then made up to 56 ml with acetic acid and then 14 ml of water added.
- the TMP (3 g) was loaded into the reactor in molten form, that is to say after having heated it to 70 ° C. in the oven.
- the above catalytic solution was added then Pothodichlorobenzene 50ml.
- the activity of the catalytic system did not decrease between each cycle.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Catalysts (AREA)
Abstract
Description
Claims
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96937350A EP0934242A1 (fr) | 1996-10-28 | 1996-10-28 | Procede de preparation de la trimethylbenzoquinone |
CA002267089A CA2267089A1 (fr) | 1996-10-28 | 1996-10-28 | Procede de preparation de la trimethylbenzoquinone |
IL12950696A IL129506A0 (en) | 1996-10-28 | 1996-10-28 | Method for preparing trimethylbenzoquinone |
JP10520097A JP2001503045A (ja) | 1996-10-28 | 1996-10-28 | トリメチルベンゾキノンの製造法 |
BR9612757-0A BR9612757A (pt) | 1996-10-28 | 1996-10-28 | Processo para preparação de 2,3,5 - trimetilhidro quinona por oxidaçao de 2,3,6 - trimetilfenol |
PCT/FR1996/001689 WO1998018746A1 (fr) | 1996-10-28 | 1996-10-28 | Procede de preparation de la trimethylbenzoquinone |
EA199900420A EA001916B1 (ru) | 1996-10-28 | 1996-10-28 | Способ получения триметилгидрохинона |
HU9903883A HUP9903883A3 (en) | 1996-10-28 | 1996-10-28 | Method for preparing trimethylbenzoquinone |
CZ991453A CZ145399A3 (cs) | 1996-10-28 | 1996-10-28 | Způsob přípravy trimethyibenzochinonu |
KR1019990703678A KR20000052844A (ko) | 1996-10-28 | 1996-10-28 | 트리메틸벤조퀴논의 제조방법 |
AU74981/96A AU7498196A (en) | 1996-10-28 | 1996-10-28 | Method for preparing trimethylbenzoquinone |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/FR1996/001689 WO1998018746A1 (fr) | 1996-10-28 | 1996-10-28 | Procede de preparation de la trimethylbenzoquinone |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998018746A1 true WO1998018746A1 (fr) | 1998-05-07 |
Family
ID=9489087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1996/001689 WO1998018746A1 (fr) | 1996-10-28 | 1996-10-28 | Procede de preparation de la trimethylbenzoquinone |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0934242A1 (fr) |
JP (1) | JP2001503045A (fr) |
KR (1) | KR20000052844A (fr) |
AU (1) | AU7498196A (fr) |
BR (1) | BR9612757A (fr) |
CA (1) | CA2267089A1 (fr) |
EA (1) | EA001916B1 (fr) |
HU (1) | HUP9903883A3 (fr) |
IL (1) | IL129506A0 (fr) |
WO (1) | WO1998018746A1 (fr) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0338666A1 (fr) * | 1988-03-16 | 1989-10-25 | Japan as represented by Director-General, Agency of Industrial Science and Technology | Procédé pour la fabrication de benzoquinone-2,3,5-triméthyl |
SU1719392A1 (ru) * | 1990-03-30 | 1992-03-15 | Институт катализа СО АН СССР | Способ получени 2,3,6-триметилбензохинона |
-
1996
- 1996-10-28 JP JP10520097A patent/JP2001503045A/ja active Pending
- 1996-10-28 WO PCT/FR1996/001689 patent/WO1998018746A1/fr not_active Application Discontinuation
- 1996-10-28 AU AU74981/96A patent/AU7498196A/en not_active Abandoned
- 1996-10-28 HU HU9903883A patent/HUP9903883A3/hu unknown
- 1996-10-28 EA EA199900420A patent/EA001916B1/ru not_active IP Right Cessation
- 1996-10-28 BR BR9612757-0A patent/BR9612757A/pt not_active Application Discontinuation
- 1996-10-28 CA CA002267089A patent/CA2267089A1/fr not_active Abandoned
- 1996-10-28 EP EP96937350A patent/EP0934242A1/fr not_active Withdrawn
- 1996-10-28 KR KR1019990703678A patent/KR20000052844A/ko not_active Application Discontinuation
- 1996-10-28 IL IL12950696A patent/IL129506A0/xx unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0338666A1 (fr) * | 1988-03-16 | 1989-10-25 | Japan as represented by Director-General, Agency of Industrial Science and Technology | Procédé pour la fabrication de benzoquinone-2,3,5-triméthyl |
SU1719392A1 (ru) * | 1990-03-30 | 1992-03-15 | Институт катализа СО АН СССР | Способ получени 2,3,6-триметилбензохинона |
Non-Patent Citations (2)
Title |
---|
CHEMICAL ABSTRACTS, vol. 117, no. 21, 23 November 1992, Columbus, Ohio, US; abstract no. 212142, KHOLDEEVA O A ET AL: "Method of producing 2,3,6-trimethylbenzoquinone" XP002033535 * |
KOZHEVNIKOV I V ET AL: "Molybdovanadophosphate heteropolyanion catalyzed oxidation of 2,3,6-trimethylphenol by dioxygen in a two-phase system", J. CHEM. RES., SYNOP. (JRPSDC,03082342);96; (5); PP.238-239, DELFT UNIVERSITY TECHNOLOGY;LABORATORY ORGANIC CHEMISTRY CATALYSIS; DELFT; 2628 BL; NETH. (NL), XP000676827 * |
Also Published As
Publication number | Publication date |
---|---|
EA199900420A1 (ru) | 1999-10-28 |
IL129506A0 (en) | 2000-02-29 |
CA2267089A1 (fr) | 1998-05-07 |
EA001916B1 (ru) | 2001-10-22 |
BR9612757A (pt) | 1999-10-19 |
HUP9903883A3 (en) | 2001-07-30 |
AU7498196A (en) | 1998-05-22 |
KR20000052844A (ko) | 2000-08-25 |
HUP9903883A2 (hu) | 2000-03-28 |
JP2001503045A (ja) | 2001-03-06 |
EP0934242A1 (fr) | 1999-08-11 |
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