WO1998018555A1 - Procede de regeneration de catalyseurs - Google Patents
Procede de regeneration de catalyseurs Download PDFInfo
- Publication number
- WO1998018555A1 WO1998018555A1 PCT/EP1997/005688 EP9705688W WO9818555A1 WO 1998018555 A1 WO1998018555 A1 WO 1998018555A1 EP 9705688 W EP9705688 W EP 9705688W WO 9818555 A1 WO9818555 A1 WO 9818555A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- catalyst
- hydrogen peroxide
- process according
- reaction
- synthesis
- Prior art date
Links
Classifications
-
- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/90—Regeneration or reactivation
-
- 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
- C07D301/12—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with hydrogen peroxide or inorganic peroxides or peracids
-
- 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 subject of the present invention is a process for the regeneration of catalysts of the titanium silicalite type, catalysts used in particular in reactions between hydrogen peroxide and an organic co-reactant.
- titanium silicalite as a catalyst, in particular in oxidation reactions of saturated hydrocarbons to form alcohols or ketones, as described in European patent application EP-A-376453 or in reactions of epoxidation of olefins, as described in patent application EP-A-1001 19 or also in hydroxylation reactions of aromatic compounds as reported in application EP-A-200260.
- the activity of these catalysts however drops rapidly. It therefore appears essential to have a means of regenerating them in order to be able to use them repeatedly.
- Patent application JP 03/1 14536 describes a process for regenerating catalysts of the titanium silicalite type by washing with methanol, ketones or benzene. However, this regeneration process does not allow the initial catalytic activity of the catalyst to be recovered quickly and completely.
- the object of the present invention is to provide a process for regenerating catalysts of the titanium silicalite type which is more efficient than the known process. Consequently, the invention relates to a process for regenerating a catalyst of the titanium silicalite type, comprising a treatment of the spent catalyst with a liquid solution, which is characterized in that the liquid solution comprises at least one oxidizing agent chosen from hydrogen peroxide, ozone and organic peroxide compounds.
- organic peroxides which can be used in the process according to the invention are performic acid, peracetic acid and perfluoroperacetic acid. Hydrogen peroxide is preferred.
- the titanium silicalite type catalysts to which the regeneration process according to the invention applies are crystalline synthetic materials with a structure similar to that of zeolites, comprising oxides of silicon and titanium and characterized by an infrared absorption band at about 950-960 cm-1.
- Their general formula is typically: xTiO 2 (lx) SiO 2 in which x is between 0.0001 and 0.5, preferably between 0.001 and 0.05
- TS-1 Materials of this type, known as TS-1, have a microporous crystalline zeolitic structure analogous to that of zeolite ZSM-5
- the properties and the main applications of these compounds are known (B Notari, Structure-Activity and Selectivity Relationship in Heterogeneous Catalysis; RK Grasselli and AW Sleight Editors, Elsevier, 1991, p 243- 256)
- Their synthesis has been studied in particular by A Van der Poel and J Van Hooff (Applied Catalysis A, 1992, Volume 92, pages 93-1 11)
- Other materials of this type have a structure analogous to that of zeolite beta or of zeolite ZSM-1 1
- the liquid regeneration solution may consist essentially of the oxidizing agent.
- it may further comprise a additive or a solvent for the oxidizing agent, that is to say a compound with which the oxidizing agent is completely miscible If necessary, said additive or solvent must be inert with respect to the oxidizing agent, in regeneration conditions
- a polar solvent such as a halogenated solvent, for example trichloromethane, or water is very suitable as solvent for the oxidizing agent Water is particularly advantageous When the used catalyst has been used in a reaction using hydrogen peroxide and an organic co-reagent, the regeneration treatment is generally carried out in the substantial absence of the organic co-reagent
- the liquid solution generally does not contain more than 90% by weight of oxidizing agent.
- a solution containing not more than 50% by weight of oxidizing agent is used.
- a solution containing not more than 20 % by weight of oxidizing agent is used Generally, the liquid solution contains at least 0.5% by weight of oxidizing agent
- it contains at least 1%.
- a very particularly preferred solution in the process according to the invention is an aqueous solution of hydrogen peroxide titrating from 1 to 10% by weight of hydrogen peroxide, preferably from 2 to 5% by weight of hydrogen peroxide
- the treatment of the catalyst with the liquid regeneration solution can be carried out by any suitable means, for example by immersion of the catalyst in the liquid solution when the latter is in the form of dispersed particles or by passage of said solution through the catalyst bed when it is used in a fixed bed Generally, 0.25 to 50 liters of liquid solution is used per kilo of catalyst to be treated. Preferably, 0.5 to 10 liters are used per kilo of catalyst.
- the oxidizing agent can be introduced during the treatment continuously, discontinuously (by successive introductions of several doses of oxidizing agent) or by introduction of a single dose of oxidizing agent at the start of the treatment.
- the treatment of the catalyst with the liquid solution is generally carried out at a temperature between room temperature and the boiling temperature of the solution.
- a regeneration temperature of at least 50 ° C and not exceeding 100 ° C is preferred.
- Treatment with an aqueous solution of hydrogen peroxide at a temperature close to about 90 ° C has given excellent results.
- the pressure at which the process according to the invention is carried out is not critical in itself as long as it is sufficient to maintain the solution essentially in liquid form.
- the process for regenerating the catalyst comprises washing the catalyst prior to treatment with the liquid solution containing the oxidizing agent in order to remove substantially all of the compounds with which the catalyst has been in contact in the reaction in which it has been implemented. Washing consists in bringing the catalyst into contact with water or with an organic compound.
- Organic compounds are preferred. These indeed make it possible to avoid the formation of two distinct phases. In addition, they have a high solubility of the organic compounds responsible for the deactivation of the catalysts.
- the organic compounds can be chosen from aliphatic, cyclic, aromatic, alcoholic organic diluents. They preferably contain up to 20 carbon atoms. Alcohols are fine. Methanol is particularly preferred. It can be interesting to use, for washing, the diluent used when using the catalyst
- the washing temperature is generally 25 ° C. at the boiling temperature of the organic washing compound. This washing is carried out by bringing the catalyst into contact with water or with the organic compound for a period of 5 minutes to 2 hours. Preferably, the washing step does not exceed 30 minutes. In a particularly advantageous manner, the washing comprises a first washing step with an organic compound and a second washing step with water.
- the method according to the invention makes it possible to restore almost all the initial activity of the catalyst by a short-term treatment
- Controlling the pH during treatment can be advantageous This in fact makes it possible to avoid corrosion of the equipment used for the treatment In addition, this makes it possible, when the catalyst is dispersed in a binder, to prevent attack binder by the acids released during the treatment
- a control of the pH also makes it possible to limit the decomposition of the oxidizing agent by metals released during the treatment
- the pH is maintained at a value of at least 2, in particular at minus 4
- the pH does not usually exceed 8, preferably 7
- alkaline pHs can affect the activity of the catalyst.
- the operation is preferably carried out at a pH maintained in the range from 2 to 8, more particularly from 4 to 7. pH can be controlled by adding alkali, for example sodium hydroxide
- the process according to the invention applies to used titanium silicalite catalysts, in particular those used in a reaction using hydrogen peroxide and an organic co-reagent, in particular those used in epoxidation reactions of olefins, hydroxylation of aromatic compounds or oxidation of saturated hydrocarbons. It applies more particularly to catalysts used in olefin epoxidation reactions using hydrogen peroxide. It is particularly applicable to catalysts used in the epoxidation reaction of allyl chloride to epichlorohydrin. In addition, the process can be applied to catalysts used in the epoxidation reaction of propylene to propylene oxide by means of hydrogen peroxide
- the invention therefore also relates to a process for the synthesis of epoxides by reaction between an olefin and hydrogen peroxide in the presence of a catalyst regenerated by means of the regeneration process described above, in which a liquid effluent from the synthesis of epoxides is recycled and used for the regeneration of the catalyst.
- Example 1 The invention is more fully illustrated in the following nonlimiting examples.
- Example 1 The invention is more fully illustrated in the following nonlimiting examples.
- the catalyst was washed in a similar manner with water at 75 ° C. The water was removed, then the catalyst was treated analogously with a 3.5% by weight aqueous solution of hydrogen peroxide at 85 ° C for 1 hour. The aqueous solution was drained and the reactor was again supplied with the solution of allyl chloride and hydrogen peroxide in methanol, under the conditions set out above. 11 cycles such as that described above for use / regeneration of the catalyst were carried out. At each cycle, the activity of the regenerated catalyst was measured by determining the amount of epichlorohydrin produced under these conditions before the conversion rate of hydrogen peroxide fell again by 25% compared to its initial value measured after one hour walk. A constant activity of 127 grams of epichlorohydrin was observed during each of the 11 cycles.
- Example 2 Example 2
- Example 1 was repeated, but using a liquid solution containing 1.06% hydrogen peroxide at a temperature of 86 ° C.
- the yield of epichlorohydrin was 117 grams.
- Example 3 (comparison)
- Example 1 was repeated but using as liquid solution water free of hydrogen peroxide at 85 ° C for 1 hour.
- the yield of epichlorohydrin was 90 grams.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Epoxy Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9712565-2A BR9712565A (pt) | 1996-10-25 | 1997-10-09 | Processo para regeneração de um catalisador do tipo silicalito de tit‰nio e utilização de um catalisador do tipo silicato de tit‰nio regenerado. |
EP97911226A EP0958049A1 (fr) | 1996-10-25 | 1997-10-09 | Procede de regeneration de catalyseurs |
AU48675/97A AU4867597A (en) | 1996-10-25 | 1997-10-09 | Method for regenerating catalysts |
NZ335404A NZ335404A (en) | 1996-10-25 | 1997-10-09 | Process for the regeneration of catalysts using an oxidizing agent |
CA002268872A CA2268872A1 (fr) | 1996-10-25 | 1997-10-09 | Procede de regeneration de catalyseurs |
US09/294,364 US6063941A (en) | 1996-10-25 | 1999-04-20 | Process for the regeneration of catalysts |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE9600912A BE1010717A3 (fr) | 1996-10-25 | 1996-10-25 | Procede de regeneration de catalyseurs. |
BE9600912 | 1996-10-25 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/294,364 Continuation US6063941A (en) | 1996-10-25 | 1999-04-20 | Process for the regeneration of catalysts |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998018555A1 true WO1998018555A1 (fr) | 1998-05-07 |
Family
ID=3890064
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/005688 WO1998018555A1 (fr) | 1996-10-25 | 1997-10-09 | Procede de regeneration de catalyseurs |
Country Status (10)
Country | Link |
---|---|
US (1) | US6063941A (fr) |
EP (1) | EP0958049A1 (fr) |
AR (1) | AR010027A1 (fr) |
AU (1) | AU4867597A (fr) |
BE (1) | BE1010717A3 (fr) |
BR (1) | BR9712565A (fr) |
CA (1) | CA2268872A1 (fr) |
NZ (1) | NZ335404A (fr) |
TW (1) | TW342353B (fr) |
WO (1) | WO1998018555A1 (fr) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0936219A1 (fr) * | 1998-02-11 | 1999-08-18 | Linde Aktiengesellschaft | Procédé et Réacteur pour la préparation d'un Epoxyde |
EP1074547A1 (fr) * | 1999-08-05 | 2001-02-07 | Linde Aktiengesellschaft | Procédé pour la préparation d'un époxyde |
WO2001012617A1 (fr) * | 1999-08-18 | 2001-02-22 | Shell Internationale Research Maatschappij B.V. | Procede de preparation d'oxyde d'alkylene |
EP1093853A1 (fr) * | 1999-10-18 | 2001-04-25 | Enichem S.p.A. | Procédé de régénération de catalyseurs zéolithiques contenant du titane |
WO2002022259A1 (fr) * | 2000-09-11 | 2002-03-21 | Basf Aktiengesellschaft | Procede de regeneration d'un catalyseur aux zeolithes |
WO2004026466A1 (fr) * | 2002-09-20 | 2004-04-01 | Arco Chemical Technology, L.P. | Regeneration de catalyseur heterogene |
US6790969B2 (en) | 2000-09-11 | 2004-09-14 | Basf Aktiengesellschaft | Method for regenerating a zeolite catalyst |
WO2012017452A1 (fr) | 2010-08-03 | 2012-02-09 | Aditya Birla Science And Technology Co. Ltd. | Procédé de régénération d'un catalyseur de titanosilicate |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9812235D0 (en) | 1998-06-08 | 1998-08-05 | Exxon Chemical Patents Inc | Oxidation process |
AU770334B2 (en) * | 1999-12-09 | 2004-02-19 | Dow Global Technologies Inc. | Activation and regeneration of a hydro-oxidation catalyst |
EP1122248A1 (fr) | 2000-02-07 | 2001-08-08 | Degussa AG | Procédé pour l'époxydation d'oléfines |
EP1122246A1 (fr) | 2000-02-07 | 2001-08-08 | Degussa AG | Procédé pour l'époxydation d'oléfines |
EP1122247A1 (fr) | 2000-02-07 | 2001-08-08 | Degussa AG | Procédé pour l'epoxydation d'oléfines |
DE50115570D1 (de) * | 2001-01-08 | 2010-09-09 | Evonik Degussa Gmbh | Verfahren zur Epoxidierung von Olefinen |
JP4265108B2 (ja) * | 2001-03-14 | 2009-05-20 | 住友化学株式会社 | 固体触媒の再生方法 |
US6596881B2 (en) | 2001-06-13 | 2003-07-22 | Degussa Ag | Process for the epoxidation of olefins |
US6608219B2 (en) | 2001-06-13 | 2003-08-19 | Degussa Ag | Process for the epoxidation of olefins |
US6600055B2 (en) | 2001-06-13 | 2003-07-29 | Degussa Ag | Process for the epoxidation of olefins |
US6749668B2 (en) * | 2001-06-18 | 2004-06-15 | Degussa Ag | Process for the recovery of combustible components of a gas stream |
US6610865B2 (en) | 2001-08-15 | 2003-08-26 | Degussa Ag | Process for the epoxidation of olefins |
US6596883B2 (en) | 2001-08-23 | 2003-07-22 | Degussa Ag | Process for the epoxidation of olefins |
US6720436B2 (en) * | 2002-03-18 | 2004-04-13 | Degussa Ag | Process for the epoxidation of olefins |
US7141683B2 (en) * | 2002-05-02 | 2006-11-28 | Degussa Ag | Process for the epoxidation of olefins |
EP1552886B1 (fr) * | 2002-05-31 | 2020-05-06 | China Petroleum & Chemical Corporation | Procede pour regenerer un catalyseur contenant du titane |
US20040000473A1 (en) * | 2002-06-20 | 2004-01-01 | Willi Hofen | Process of separating 1-methoxy-2-propanol and 2-methoxy-1-propanol from aqueous compositions |
US7722847B2 (en) * | 2002-09-30 | 2010-05-25 | Evonik Degussa Gmbh | Aqueous hydrogen peroxide solutions and method of making same |
US6838572B2 (en) * | 2002-09-30 | 2005-01-04 | Degussa Ag | Process for the epoxidation of olefins |
FR2846964B1 (fr) * | 2002-11-12 | 2006-07-21 | Procede de fabrication de 1,2-epoxy-3-chloropropane | |
FR2846965B1 (fr) * | 2002-11-12 | 2006-10-13 | Procede de fabrication de 1,2-epoxy-3-chloropropane | |
US7169945B2 (en) * | 2002-11-26 | 2007-01-30 | Degussa Ag | Process for the epoxidation of olefins |
KR101166932B1 (ko) * | 2005-07-27 | 2012-07-19 | 에스케이이노베이션 주식회사 | 티타늄 함유 분자체 촉매의 재생방법 |
CN101439301B (zh) * | 2007-11-22 | 2011-07-20 | 中国石油化工股份有限公司 | 一种高氯酸低温氧化再生催化剂的方法 |
CN103459378B (zh) | 2011-02-04 | 2015-05-27 | 陶氏环球技术有限责任公司 | 生产氧杂环丙烷类化合物的系统和方法 |
CN103547574B (zh) | 2011-02-04 | 2016-01-20 | 陶氏环球技术有限责任公司 | 混合物的相分离 |
US8980780B2 (en) | 2011-02-04 | 2015-03-17 | Dow Global Technologies Llc | Regenerating a titanium silicalite catalyst |
CN104415743B (zh) * | 2013-09-09 | 2017-02-01 | 中国石油化工股份有限公司 | 一种含钛催化剂的再生方法 |
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EP0200260A2 (fr) * | 1985-04-23 | 1986-12-10 | ENICHEM SYNTHESIS S.p.A. | Catalyseur à base de silicium et de titane ayant une haute résistance mécanique |
EP0267362A1 (fr) * | 1986-11-14 | 1988-05-18 | MONTEDIPE S.r.l. | Procédé catalytique de production d'oximes |
EP0538729A2 (fr) * | 1991-10-25 | 1993-04-28 | BASF Aktiengesellschaft | Procédé de préparation de cycloalcanols |
EP0631983A1 (fr) * | 1993-07-02 | 1995-01-04 | BASF Aktiengesellschaft | Oxydes cristallins du titane |
DE4425672A1 (de) * | 1994-07-20 | 1996-01-25 | Basf Ag | Oxidationskatalysator, Verfahren zu seiner Herstellung und Oxidationsverfahren unter Verwendung des Oxidationskatalysators |
DE4435239A1 (de) * | 1994-10-04 | 1996-04-11 | Basf Ag | Verfahren zur Herstellung von Hydroxylaminen aus Ammoniak oder den entsprechenden Aminen, Wasserstoff und Sauerstoff |
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IT1152299B (it) * | 1982-07-28 | 1986-12-31 | Anic Spa | Procedimento per l'espossidazione di composti olefinici |
KR0151712B1 (ko) * | 1988-11-08 | 1998-10-15 | 피터 챨스 보우덴 | 포화탄화수소 사슬의 산화 |
JPH03114536A (ja) * | 1989-09-27 | 1991-05-15 | Mitsui Toatsu Chem Inc | チタノシリケート触媒の再生方法 |
IT230329Y1 (it) * | 1993-07-01 | 1999-06-02 | Sviluppo Settori Impiego Srl | Cassetta pieghevole per ortofrutta |
US5354875A (en) * | 1993-12-23 | 1994-10-11 | Uop | Epoxidation of olefins using a titania-supported titanosilicate |
-
1996
- 1996-10-25 BE BE9600912A patent/BE1010717A3/fr not_active IP Right Cessation
-
1997
- 1997-10-09 BR BR9712565-2A patent/BR9712565A/pt not_active IP Right Cessation
- 1997-10-09 CA CA002268872A patent/CA2268872A1/fr not_active Abandoned
- 1997-10-09 EP EP97911226A patent/EP0958049A1/fr not_active Withdrawn
- 1997-10-09 AU AU48675/97A patent/AU4867597A/en not_active Abandoned
- 1997-10-09 NZ NZ335404A patent/NZ335404A/xx unknown
- 1997-10-09 WO PCT/EP1997/005688 patent/WO1998018555A1/fr not_active Application Discontinuation
- 1997-10-14 TW TW086115057A patent/TW342353B/zh active
- 1997-10-24 AR ARP970104929A patent/AR010027A1/es unknown
-
1999
- 1999-04-20 US US09/294,364 patent/US6063941A/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0200260A2 (fr) * | 1985-04-23 | 1986-12-10 | ENICHEM SYNTHESIS S.p.A. | Catalyseur à base de silicium et de titane ayant une haute résistance mécanique |
EP0267362A1 (fr) * | 1986-11-14 | 1988-05-18 | MONTEDIPE S.r.l. | Procédé catalytique de production d'oximes |
EP0538729A2 (fr) * | 1991-10-25 | 1993-04-28 | BASF Aktiengesellschaft | Procédé de préparation de cycloalcanols |
EP0631983A1 (fr) * | 1993-07-02 | 1995-01-04 | BASF Aktiengesellschaft | Oxydes cristallins du titane |
DE4425672A1 (de) * | 1994-07-20 | 1996-01-25 | Basf Ag | Oxidationskatalysator, Verfahren zu seiner Herstellung und Oxidationsverfahren unter Verwendung des Oxidationskatalysators |
DE4435239A1 (de) * | 1994-10-04 | 1996-04-11 | Basf Ag | Verfahren zur Herstellung von Hydroxylaminen aus Ammoniak oder den entsprechenden Aminen, Wasserstoff und Sauerstoff |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0936219A1 (fr) * | 1998-02-11 | 1999-08-18 | Linde Aktiengesellschaft | Procédé et Réacteur pour la préparation d'un Epoxyde |
EP1074547A1 (fr) * | 1999-08-05 | 2001-02-07 | Linde Aktiengesellschaft | Procédé pour la préparation d'un époxyde |
US6365761B1 (en) | 1999-08-18 | 2002-04-02 | Shell Oil Company | Process for preparing alkylene oxide |
WO2001012617A1 (fr) * | 1999-08-18 | 2001-02-22 | Shell Internationale Research Maatschappij B.V. | Procede de preparation d'oxyde d'alkylene |
EP1093853A1 (fr) * | 1999-10-18 | 2001-04-25 | Enichem S.p.A. | Procédé de régénération de catalyseurs zéolithiques contenant du titane |
SG87189A1 (en) * | 1999-10-18 | 2002-03-19 | Enichem Spa | Process for the regeneration of zeolitic catalysts containing titanium |
US6403514B1 (en) | 1999-10-18 | 2002-06-11 | Enichem S.P.A. | Process for the regeneration of zeolitic catalysts containing titanium |
WO2002022259A1 (fr) * | 2000-09-11 | 2002-03-21 | Basf Aktiengesellschaft | Procede de regeneration d'un catalyseur aux zeolithes |
US6790969B2 (en) | 2000-09-11 | 2004-09-14 | Basf Aktiengesellschaft | Method for regenerating a zeolite catalyst |
US6958304B2 (en) | 2000-09-11 | 2005-10-25 | Basf Aktiengesellschaft | Method for regenerating a zeolite catalyst |
WO2004026466A1 (fr) * | 2002-09-20 | 2004-04-01 | Arco Chemical Technology, L.P. | Regeneration de catalyseur heterogene |
CN1331593C (zh) * | 2002-09-20 | 2007-08-15 | 阿克奥化学技术有限公司 | 非均相催化剂的再生方法 |
WO2012017452A1 (fr) | 2010-08-03 | 2012-02-09 | Aditya Birla Science And Technology Co. Ltd. | Procédé de régénération d'un catalyseur de titanosilicate |
US8679999B2 (en) | 2010-08-03 | 2014-03-25 | Aditya Birla Science & Technology Co. Ltd. | Process for regeneration of titano silicate catalyst |
Also Published As
Publication number | Publication date |
---|---|
TW342353B (en) | 1998-10-11 |
AR010027A1 (es) | 2000-05-17 |
BR9712565A (pt) | 1999-10-19 |
NZ335404A (en) | 2000-12-22 |
US6063941A (en) | 2000-05-16 |
EP0958049A1 (fr) | 1999-11-24 |
AU4867597A (en) | 1998-05-22 |
BE1010717A3 (fr) | 1998-12-01 |
CA2268872A1 (fr) | 1998-05-07 |
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