EP1051256A1 - Procede pour regenerer des catalyseurs a supports, recouverts de particules d'or et servant a l'oxydation d'hydrocarbures insatures - Google Patents

Procede pour regenerer des catalyseurs a supports, recouverts de particules d'or et servant a l'oxydation d'hydrocarbures insatures

Info

Publication number
EP1051256A1
EP1051256A1 EP99901588A EP99901588A EP1051256A1 EP 1051256 A1 EP1051256 A1 EP 1051256A1 EP 99901588 A EP99901588 A EP 99901588A EP 99901588 A EP99901588 A EP 99901588A EP 1051256 A1 EP1051256 A1 EP 1051256A1
Authority
EP
European Patent Office
Prior art keywords
catalyst
propene
oxidation
unsaturated hydrocarbons
regenerated
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.)
Withdrawn
Application number
EP99901588A
Other languages
German (de)
English (en)
Inventor
Markus Weisbeck
Ernst-Ulrich Dorf
Gerhard Wegener
Christoph Schild
Bernhard Lücke
Herbert Dilcher
Ulrich Schülke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Covestro Deutschland AG
Original Assignee
Bayer AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bayer AG filed Critical Bayer AG
Publication of EP1051256A1 publication Critical patent/EP1051256A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D301/00—Preparation of oxiranes
    • C07D301/02—Synthesis of the oxirane ring
    • C07D301/03—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds
    • C07D301/04—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with air or 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
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/48—Silver or gold
    • B01J23/52—Gold
    • 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
    • B01J23/90—Regeneration or reactivation
    • B01J23/96—Regeneration or reactivation of catalysts comprising metals, oxides or hydroxides of the noble metals
    • 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
    • B01J38/00—Regeneration or reactivation of catalysts, in general
    • B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
    • B01J38/60—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using acids
    • 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
    • B01J38/00—Regeneration or reactivation of catalysts, in general
    • B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
    • B01J38/68—Liquid treating or treating in liquid phase, e.g. dissolved or suspended including substantial dissolution or chemical precipitation of a catalyst component in the ultimate reconstitution of the catalyst
    • 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
    • B01J38/00—Regeneration or reactivation of catalysts, in general
    • B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
    • B01J38/70—Wet oxidation of material submerged in liquid
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D301/00—Preparation of oxiranes
    • C07D301/02—Synthesis of the oxirane ring
    • C07D301/03—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D301/00—Preparation of oxiranes
    • C07D301/02—Synthesis of the oxirane ring
    • C07D301/03—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds
    • C07D301/04—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with air or molecular oxygen
    • C07D301/08—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with air or molecular oxygen in the gaseous phase
    • C07D301/10—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with air or molecular oxygen in the gaseous phase with catalysts containing silver or gold
    • 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
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/584—Recycling of catalysts

Definitions

  • the invention relates to a process for the regeneration of catalysts for the catalytic production of epoxides from unsaturated hydrocarbons
  • propene oxide is one of the most important basic chemicals in the chemical industry. With a share of over 60%, the application area is in the plastics sector, especially for the production of polyether polyols for the synthesis of polyurethanes. In addition, even larger market shares in
  • glycols especially lubricants and antifreezes, is occupied by propene oxide derivatives.
  • organic compounds were chosen to transfer oxygen to propene (oxirane process).
  • Indirect epoxidation is based on the fact that organic peroxides such as hydroperoxides or peroxycarboxylic acids in the liquid phase can selectively transfer their peroxide oxygen to olefins to form epoxides.
  • the hydroperoxides are converted into alcohols and the peroxycarboxylic acids into acids.
  • Peroxycarboxylic acids are generated from the corresponding hydrocarbon or aldehyde by autoxidation with air or molecular oxygen.
  • a serious disadvantage of indirect oxidation is the economic dependence of the propene oxide value on the market of the co-product.
  • the propene oxidation takes place with low yield in the liquid phase on platinum metal-containing titanium sieves with a gas mixture consisting of molecular oxygen and molecular hydrogen (JP-A 92/352771).
  • EP-A 0 709 360 AI (Haruta et al.) Describes for the first time a gas-phase direct oxidation of propene to propene oxide with 100% selectivity. It is a catalytic gas phase oxidation with molecular oxygen in the presence of the reducing agent hydrogen. Special titanium dioxide with an anatase modification, which is coated with nanoscale gold particles, is used as the catalyst. The propene conversion and the propene oxide yield are given as a maximum of 1%.
  • the described Au / TiO 2 catalysts reach the approx. 1% pro pen turnover only for a very short time; z. B. the typical half-lives at moderate temperatures (40-50 ° C) are only 100-200 min.
  • the invention therefore relates to a process for the regeneration of supported catalysts with gold particles based on titanium oxide or titanium oxide hydrate for the oxidation of unsaturated hydrocarbons, in which the catalytic activity of the catalyst is regenerated by contacting it with dilute hydroperoxide solution, water or dilute acid.
  • the treatment in the sense of the invention can be at room temperature or higher
  • the treatment can be carried out separately after removal of the catalysts from the reactor or in the reactor if the catalytic oxidation of Propene in the presence of hydrogen and the catalyst regeneration with water or water vapor can follow one another.
  • Agitation of the regeneration mixture can be advantageous, but is not a condition for the use according to the invention.
  • supported catalysts based on titanium dioxide or titanium oxide hydrate can be regenerated with nanoscale gold particles.
  • the catalysts are preferably produced by the “deposition-precipitation” method.
  • the concentration of dilute aqueous hydroperoxide solution is usually in the range from 1 to 10% by weight, preferably 1 to 4% by weight.
  • the amount of catalyst used and the amounts of gas used are not limited.
  • the “space velocity” of the gas flow through the catalyst bed should normally be about 0.5 to 20 l / g cat. X h.
  • the use of the regenerated catalysts according to the invention is carried out in the presence of the gases oxygen and hydrogen.
  • the main products are water, propane and CO 2 at 150 ° C
  • the reaction temperature is reduced to ⁇ 100 ° C., preferably 30-60 ° C.
  • the water formation becomes strong and the CO 2 formation is completely suppressed.
  • the main product propylene oxide approximately 45% yield
  • only traces of other components approximately 1% based on propene oxides
  • the water content is twice (molar) the propene oxide content.
  • the composition of the gas phase, containing propene, oxygen, hydrogen and possibly an inert gas, is not only important for the space-time yield, but also for safety.
  • all molar compositions of the gases propene / oxygen / hydrogen / inert gas, eg nitrogen, can be used.
  • Preferred gas ratios for the oxidation reaction are the following ratios: H 2 / hydrocarbon / oxygen / nitrogen: 20-80% / 10 - 50% / 1 -10% / 0-50%; preferably H 2 / hydrocarbon / oxygen / nitrogen: 30-75% / 15-40 / 3-8% / 0-10%.
  • the molecular oxygen used for the reaction can be of diverse origins, for example pure oxygen, air or other oxygen / inert gas mixtures.
  • the reactor is a fixed-bed tube reactor (1 cm in diameter, 20 cm in length) made of double-walled glass, which is heated to 46 ° C. by means of a water thermostat. A static mixing and temperature control section is connected upstream of the reactor. The gold supported catalyst is placed on a glass frit. The catalyst load is 1.8 1 / g cat. H. The reactant gases are metered into the reactor from top to bottom by means of mass flow controllers.
  • the starting gas ratios are O 2 / H 2 / C 3 H 6 : 0.1 / 1.3 / 0.4 1 / h.
  • reaction gas mixture is analyzed by means of gas chromatography with a FID (all oxygen-containing organic compounds, except CO 2 ) and TCD detector (Ermanentgase, CO, CO 2 , H 2 O).
  • FID all oxygen-containing organic compounds, except CO 2
  • TCD detector Ermanentgase, CO, CO 2 , H 2 O.
  • the system is controlled by a central data acquisition system.
  • the catalysts are examined with TEM (Trasmission Elctron Microscopy) for the gold particle size.
  • a solution of 0.104 g HAuCl 4 x 4 H 2 O in 400 ml distilled water is heated to 70 ° C., brought to pH 7.5 with an aqueous 0.1 N NaOH solution and 5 g titanium dioxide (anatase- Rutile mixed oxide; P25 from the company
  • Catalyst which has become inactive by reaction (2 g; 0.6% propene oxide yield) and which was prepared according to catalyst preparation 1 is suspended in 100 ml of H 2 O, stirred at 80 ° C. for 1 h, separated and at 150 ° C. for 1 hour dried. The contact thus obtained is used for propene oxidation according to the standard procedure.
  • Catalyst which has become inactive by reaction (2 g; 0.6% propene oxide yield) and which was prepared after catalyst preparation 1 is suspended in 100 ml of H 2 O, stirred for 3 h at room temperature, separated and dried at 150 ° C. for 1 h. net. The contact thus obtained is used for propene oxidation according to the standard procedure.
  • Catalyst which has become inactive by reaction (2 g; 0.6% propene oxide yield), which was prepared after catalyst preparation 1, is suspended in 100 ml of 3% H 2 O 2 solution, stirred for 1 h at room temperature, separated and 1 h dried at 150 ° C. The contact thus obtained is used for propene oxidation after
  • Catalyst that has become inactive by reaction (2 g; 0.6% propene oxide yield), which was prepared according to catalyst preparation 1, is suspended in 100 ml of 6% H 2 O 2 solution, stirred for 1 h at room temperature, separated and 1 h dried at 150 ° C. The contact thus obtained is used for propene oxidation according to the standard procedure.
  • Catalyst which has become inactive by reaction (2 g; 0.6% propene oxide yield) and which was prepared according to catalyst preparation 1 is suspended in 100 ml of 3% H 2 O 2 solution, stirred at 50 ° C. for 1 h, and separated off and dried at 150 ° C. The contact thus obtained is used for propene oxidation according to the standard procedure.
  • Catalyst which has become inactive by reaction (2 g; 0.2% propene oxide yield), which was prepared according to catalyst preparation 2, is suspended in 500 ml of water, stirred for 1 h at room temperature, separated and dried at 150 ° C. for 1 h. The contact thus obtained is used for propene oxidation according to the standard procedure.
  • Catalyst which has become inactive by reaction (2 g; 0.2% propene oxide yield), which was prepared according to catalyst preparation 2, is suspended in 100 ml of 3% H 2 O 2 solution, stirred at room temperature for 1 h, separated and 1 h dried at 150 ° C. The contact thus obtained is used for propene oxidation after

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Epoxy Compounds (AREA)
  • Catalysts (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

L'invention concerne un procédé pour régénérer un catalyseur à support recouvert de particules d'or, à base de dioxyde de titane ou d'hydrate d'oxyde de titane, servant à l'oxydation d'hydrocarbures insaturés dans la phase gazeuse. L'invention est caractérisée en ce que l'on régénère le catalyseur en le mettant en contact avec de l'eau ou de l'acide dilué ou avec une solution d'hydroperoxyde diluée, pour lui redonner son activité catalytique. L'invention concerne également l'utilisation de ces catalyseurs régénérés pour l'époxydation d'éthène, de propène, de 1-butène ou de 2-butène dans la phase gazeuse.
EP99901588A 1998-02-06 1999-01-07 Procede pour regenerer des catalyseurs a supports, recouverts de particules d'or et servant a l'oxydation d'hydrocarbures insatures Withdrawn EP1051256A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19804711A DE19804711A1 (de) 1998-02-06 1998-02-06 Verfahren zur Regenerierung von mit Goldteilchen belegten Trägerkatalysatoren für die Oxidation ungesättigter Kohlenwasserstoffe
DE19804711 1998-02-06
PCT/EP1999/000035 WO1999039827A1 (fr) 1998-02-06 1999-01-07 Procede pour regenerer des catalyseurs a supports, recouverts de particules d'or et servant a l'oxydation d'hydrocarbures insatures

Publications (1)

Publication Number Publication Date
EP1051256A1 true EP1051256A1 (fr) 2000-11-15

Family

ID=7856833

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99901588A Withdrawn EP1051256A1 (fr) 1998-02-06 1999-01-07 Procede pour regenerer des catalyseurs a supports, recouverts de particules d'or et servant a l'oxydation d'hydrocarbures insatures

Country Status (12)

Country Link
EP (1) EP1051256A1 (fr)
JP (1) JP2002502687A (fr)
KR (1) KR20010040709A (fr)
CN (1) CN1144621C (fr)
AU (1) AU2164699A (fr)
BR (1) BR9907661A (fr)
CA (1) CA2319612A1 (fr)
DE (1) DE19804711A1 (fr)
HU (1) HUP0100768A3 (fr)
ID (1) ID25615A (fr)
TW (1) TW513326B (fr)
WO (1) WO1999039827A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7018948B2 (en) 1999-12-09 2006-03-28 Dow Global Technologies Inc. Activation and regeneration of a hydro-oxidation catalyst
JP4772326B2 (ja) * 2002-05-31 2011-09-14 中國石油化工股▲分▼有限公司 チタン含有触媒の再生方法
JP4917549B2 (ja) 2005-01-14 2012-04-18 ダウ グローバル テクノロジーズ エルエルシー チタノシリケートの再生、及び活性な酸化触媒の再構成
US8742147B2 (en) * 2010-12-08 2014-06-03 Shell Oil Company Process for improving the selectivity of an EO catalyst
US8742146B2 (en) * 2010-12-08 2014-06-03 Shell Oil Company Process for improving the selectivity of an EO catalyst

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5258555A (en) * 1991-10-25 1993-11-02 Basf Aktiengesellschaft Synthesis of cycloalkanols
US5620935A (en) * 1995-08-01 1997-04-15 Degussa Aktiengesellschaft Method for the regeneration of a catalyst

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1107495A (en) * 1966-01-15 1968-03-27 Knapsack Ag Process for regenerating palladium carrier catalysts for use in the manufacture of vinyl acetate
GB1569974A (en) * 1976-03-05 1980-06-25 Ici Ltd Restoration of selectivity to catalysts used in the production of olefine oxides
JP2615432B2 (ja) * 1994-10-28 1997-05-28 工業技術院長 金−酸化チタン含有触媒による炭化水素の部分酸化方法
DE69708880T2 (de) * 1996-07-01 2002-04-11 Dow Chemical Co Verfahren zur direkten oxidation von olefinen zu olefinoxiden

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5258555A (en) * 1991-10-25 1993-11-02 Basf Aktiengesellschaft Synthesis of cycloalkanols
US5620935A (en) * 1995-08-01 1997-04-15 Degussa Aktiengesellschaft Method for the regeneration of a catalyst

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9939827A1 *

Also Published As

Publication number Publication date
AU2164699A (en) 1999-08-23
WO1999039827A1 (fr) 1999-08-12
CA2319612A1 (fr) 1999-08-12
HUP0100768A2 (hu) 2001-06-28
KR20010040709A (ko) 2001-05-15
DE19804711A1 (de) 1999-08-12
HUP0100768A3 (en) 2005-06-28
BR9907661A (pt) 2000-10-24
CN1144621C (zh) 2004-04-07
TW513326B (en) 2002-12-11
CN1290194A (zh) 2001-04-04
JP2002502687A (ja) 2002-01-29
ID25615A (id) 2000-10-19

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