RO76129A - Compozitie catalitica folosita la obtinerea acizilor nesaturati - Google Patents

Compozitie catalitica folosita la obtinerea acizilor nesaturati

Info

Publication number
RO76129A
RO76129A RO7798720A RO9872077A RO76129A RO 76129 A RO76129 A RO 76129A RO 7798720 A RO7798720 A RO 7798720A RO 9872077 A RO9872077 A RO 9872077A RO 76129 A RO76129 A RO 76129A
Authority
RO
Romania
Prior art keywords
acids
current
composition used
catalytic composition
obtain non
Prior art date
Application number
RO7798720A
Other languages
English (en)
French (fr)
Inventor
Wilfrid G Shaw
David B Terrill
Ernest C Milberger
David R Woodbury
Serge R Dolhyj
Original Assignee
The Standard Oil Co,Us
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 The Standard Oil Co,Us filed Critical The Standard Oil Co,Us
Publication of RO76129A publication Critical patent/RO76129A/ro

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/84Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/85Chromium, molybdenum or tungsten
    • B01J23/88Molybdenum
    • B01J23/887Molybdenum containing in addition other metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/8878Chromium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/002Mixed oxides other than spinels, e.g. perovskite
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/16Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/24Chromium, molybdenum or tungsten
    • B01J23/28Molybdenum
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/16Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/24Chromium, molybdenum or tungsten
    • B01J23/30Tungsten
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/16Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/32Manganese, technetium or rhenium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/16Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/32Manganese, technetium or rhenium
    • B01J23/34Manganese
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/16Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/32Manganese, technetium or rhenium
    • B01J23/36Rhenium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/66Silver or gold
    • B01J23/68Silver or gold with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/84Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/85Chromium, molybdenum or tungsten
    • B01J23/88Molybdenum
    • B01J23/887Molybdenum containing in addition other metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/84Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/85Chromium, molybdenum or tungsten
    • B01J23/888Tungsten
    • B01J23/8885Tungsten containing also molybdenum
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/89Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
    • B01J23/8933Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/8993Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with chromium, molybdenum or tungsten
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/14Phosphorus; Compounds thereof
    • B01J27/186Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J27/195Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with vanadium, niobium or tantalum
    • B01J27/198Vanadium
    • B01J27/199Vanadium with chromium, molybdenum, tungsten or polonium
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/16Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
    • C07C51/21Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
    • C07C51/25Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/16Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
    • C07C51/21Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
    • C07C51/25Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring
    • C07C51/252Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring of propene, butenes, acrolein or methacrolein
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2523/00Constitutive chemical elements of heterogeneous catalysts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)
RO7798720A 1976-06-07 1977-05-03 Compozitie catalitica folosita la obtinerea acizilor nesaturati RO76129A (ro)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/693,256 US4042533A (en) 1976-06-07 1976-06-07 Producing unsaturated aliphatic acids

Publications (1)

Publication Number Publication Date
RO76129A true RO76129A (ro) 1981-03-30

Family

ID=24783951

Family Applications (1)

Application Number Title Priority Date Filing Date
RO7798720A RO76129A (ro) 1976-06-07 1977-05-03 Compozitie catalitica folosita la obtinerea acizilor nesaturati

Country Status (3)

Country Link
US (1) US4042533A (ro)
CA (1) CA1090318A (ro)
RO (1) RO76129A (ro)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1025610B (it) * 1974-11-12 1978-08-30 Montedison Spa Procedimento per la preparazione di acidi carbossilici insaturi per ossidazione catalitica in fase gassosa delle corrispondenti aldeidi
US4212767A (en) * 1978-10-17 1980-07-15 Air Products And Chemicals, Inc. Method of preparing an oxidation catalyst containing a molybdate anion
US4213917A (en) * 1978-12-01 1980-07-22 Standard Oil Company Esterification of aromatic aldehydes
US4374757A (en) * 1978-12-26 1983-02-22 The Halcon Sd Group, Inc. Catalyst and process for producing methacrylic acid
US4377501A (en) * 1978-12-26 1983-03-22 The Halcon Sd Group, Inc. Catalyst and process for producing methacrylic acid
US4454346A (en) * 1978-12-26 1984-06-12 The Halcon Sd Group, Inc. Process for producing methacrylic acid
US4240930A (en) * 1979-04-06 1980-12-23 Halcon Research And Development Corp. Catalyst and process for producing methacrylic acid
US4503247A (en) * 1979-06-12 1985-03-05 The Halcon Sd Group, Inc. Process for producing methacrylic acid
US4547588A (en) * 1979-10-03 1985-10-15 The Halcon Sd Group, Inc. Process for producing methacrylic acid
US4256915A (en) * 1979-12-26 1981-03-17 Standard Oil Company Production of ethylenically unsaturated aliphatic acids
US4301038A (en) * 1979-12-26 1981-11-17 Standard Oil Company Catalyst for the production of unsaturated aliphatic acids
US4404397A (en) * 1980-03-24 1983-09-13 Air Products And Chemicals, Inc. High conversion of C3 and C4 olefins to corresponding unsaturated aldehydes and acids with stable molybdenum catalysts
EP0044875B1 (en) * 1980-07-18 1984-06-13 Mitsubishi Kasei Corporation Catalytic composition, method for its preparation and its use
US4301030A (en) * 1980-08-05 1981-11-17 The Standard Oil Company Bi-containing methacrolein oxidation catalysts
US4301031A (en) * 1980-08-05 1981-11-17 The Standard Oil Company Methacrolein oxidation catalysts
US4347163A (en) * 1980-10-03 1982-08-31 Standard Oil Company Te-containing methacrolein oxidation catalysts and their use
US4410448A (en) * 1981-12-28 1983-10-18 The Standard Oil Company Method for controlling the change in the crush strength of a catalyst particle during finishing calcination
US4710484A (en) * 1982-06-25 1987-12-01 The Standard Oil Company Method for preparing a supported mixed-metal oxide oxidation catalyst
US4514519A (en) * 1982-07-29 1985-04-30 Monsanto Company Catalyst and reverse disproportionation process
DE3308625A1 (de) * 1983-03-11 1984-09-13 Basf Ag, 6700 Ludwigshafen Verfahren und katalysator zur herstellung von methacrylsaeure
US4808563A (en) * 1986-03-24 1989-02-28 The Standard Oil Company Molybdenum-tungsten-containing catalyst for methane conversion process
US5210293A (en) * 1989-07-05 1993-05-11 Bp Chemicals Limited Process and catalyst for the production of ethylene and acetic acid
US5260250A (en) * 1989-07-05 1993-11-09 Bp Chemicals Limited Catalyst for the production of ethylene and acetic acid
DE4022212A1 (de) * 1990-07-12 1992-01-16 Basf Ag Massen der allgemeinen formel mo(pfeil abwaerts)1(pfeil abwaerts)(pfeil abwaerts)2(pfeil abwaerts)(pfeil hoch)p(pfeil hoch)(pfeil abwaerts)a(pfeil abwaerts)(pfeil hoch)v(pfeil hoch)(pfeil abwaerts)b(pfeil abwaerts)(pfeil hoch)x(pfeil hoch)(pfeil hoch)1(pfeil hoch)(pfeil abwaerts)c(pfeil abwaerts)(pfeil hoch)x(pfeil hoch)(pfeil hoch)2(pfeil hoch)(pfeil abwaerts)d(pfeil abwaerts)(pfeil hoch)x(pfeil hoch)(pfeil hoch)3(pfeil hoch)(pfeil abwaerts)e(pfeil abwaerts)(pfeil hoch)s(pfeil hoch)(pfeil hoch)b(pfeil hoch)(pfeil abwaerts)f(pfeil abwaerts)(pfeil hoch)r(pfeil hoch)(pfeil hoch)e(pfeil hoch)(pfeil abwaerts)g(pfeil abwaerts)(pfeil hoch)s(pfeil hoch)(pfeil abwaerts)h(pfeil abwaerts)(pfeil hoch)o(pfeil hoch)(pfeil abwaerts)n(pfeil abwaerts)
GB9022127D0 (en) * 1990-10-11 1990-11-21 Bp Chem Int Ltd Process
US20030119658A1 (en) * 2001-12-21 2003-06-26 Conocophillips Company Recovery of rhenium from a spent catalyst via sublimation
US20060205978A1 (en) * 2002-08-20 2006-09-14 Nippon Shokubai Co., Ltd. Production process for catalyst
CN109304185A (zh) * 2017-07-28 2019-02-05 中国石油化工股份有限公司 适于丙烯酸生产的催化剂
CN109305902A (zh) * 2017-07-28 2019-02-05 中国石油化工股份有限公司 适于丙烯酸的生产方法
CN109304156A (zh) * 2017-07-28 2019-02-05 中国石油化工股份有限公司 负载型丙烯酸催化剂
CN109304159A (zh) * 2017-07-28 2019-02-05 中国石油化工股份有限公司 用于生产丙烯酸的催化剂
CN109304158A (zh) * 2017-07-28 2019-02-05 中国石油化工股份有限公司 丙烯酸生产用催化剂
CN109304171A (zh) * 2017-07-28 2019-02-05 中国石油化工股份有限公司 丙烯醛制丙烯酸的催化剂
CN109305901A (zh) * 2017-07-28 2019-02-05 中国石油化工股份有限公司 丙烯酸的生产方法
CN110586120A (zh) * 2018-06-12 2019-12-20 中国石油化工股份有限公司 负载型丙烯酸催化剂合成丙烯酸的方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3875220A (en) * 1973-10-11 1975-04-01 Standard Oil Co Ohio Process for the preparation of methacrylic acid from methacrolein
IT1045704B (it) * 1973-11-28 1980-06-10 Sir Soc Italiana Resine Spa Perfezionamenti nel procedimento di preparazione dell acido acrilico
US3956377A (en) * 1974-06-17 1976-05-11 The Standard Oil Company (Ohio) Production of unsaturated acids from the corresponding aldehydes

Also Published As

Publication number Publication date
US4042533A (en) 1977-08-16
CA1090318A (en) 1980-11-25

Similar Documents

Publication Publication Date Title
RO76129A (ro) Compozitie catalitica folosita la obtinerea acizilor nesaturati
SE7701562L (sv) Karboxialkylacylaminosyror
IT1075368B (it) Procedimento e catalizzatore per produrre benzeni para-dialchil sostituiti
NO145488C (no) Tellevekt med to plattformer
FR2371449B1 (fr) Acide 1-carba-2-penem-3-carboxylique
SE7706731L (sv) Spatel
BR7702654A (pt) Catamaran
MX143967A (es) Composicion catalitica mejorada para la obtencion de acrilonitrilo
MX146250A (es) Composicion catalitica mejorada para polimerizar alfa-olefinas
SE7707558L (sv) Katalysatorkomposition
BE859781A (fr) Acides pyrazol-1-yl-phenylacetiques
IT1081614B (it) Giaciglio per sedersi o sdraiarsi
FR2338948A1 (fr) Acides diphosphonoalcanecarboxyliques
SE7700670L (sv) Polyvinylbensensulfonsyror
IT1078854B (it) Composizione per profumi
RO72506A (ro) Compozitie catalitica folosita la obtinerea acizilor nesaturati
IT1088894B (it) Procedimento e composizione per la idroalchilazione e procedimento per produrre detta composizione
HU172795B (hu) Raspornyj palec s gil'zoj i raspornym ehlementom
SE7707498L (sv) Vermeherdbar hartskomposition
SE7807690L (sv) Alfa-halogenmetylaminosyror
MX3553E (es) Composicion polumerica mejorada
MX147707A (es) Composicion catalitica mejorada para la obtencion de anhidrido
RO83665A2 (ro) Compozitie catalitica folosita la obtinerea acizilor nesaturati
IT1085866B (it) Procedimento per preparare solfon-acetali
SE7714655L (sv) Substituerade pyridinkarboxylsyror