Catalysts for purifying liq. and gas mixts. contg. mercaptan(s) - e.g. for treating petrochemical streams, convert mercaptan(s) into di:sulphide cpds

Catalysts for purifying liq. and gaseous industrial mixts. contg. mercaptane, have the formula LxL'X', MyM'y', (CO)z in which x=0-4; x'=0-4; y=0-4; y'=0 or 1; z=1-14; if x=0, x'=1-3; if y=0, y'=1; M is Fe; M' is a gp. VI, VII or VIII metal; L is a monomer...

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1. Verfasser: N. S. NAMETKIN, V. M. SOBOLEV, V. D. TJURIN, A. I. NEKHAEV, L. I. LARIONOV, L. A. NEKHAEVA, N. B. ZHADANOVSKY, M. A. KUKINA, A. S. DEKHTERMAN, A. G. LEBEDEVA, D. A. MKHITAROVA, V. I. IVANOV, M. MAVLONOV, N. V. ALYMOVA, S. L. DAVYDOVA, A. N. MURATOV, V. S. LUPANDIN ET M. S. MATVEEV
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creator N. S. NAMETKIN, V. M. SOBOLEV, V. D. TJURIN, A. I. NEKHAEV, L. I. LARIONOV, L. A. NEKHAEVA, N. B. ZHADANOVSKY, M. A. KUKINA, A. S. DEKHTERMAN, A. G. LEBEDEVA, D. A. MKHITAROVA, V. I. IVANOV, M. MAVLONOV, N. V. ALYMOVA, S. L. DAVYDOVA, A. N. MURATOV, V. S. LUPANDIN ET M. S. MATVEEV
description Catalysts for purifying liq. and gaseous industrial mixts. contg. mercaptane, have the formula LxL'X', MyM'y', (CO)z in which x=0-4; x'=0-4; y=0-4; y'=0 or 1; z=1-14; if x=0, x'=1-3; if y=0, y'=1; M is Fe; M' is a gp. VI, VII or VIII metal; L is a monomer mol. or a unit of a polymer chain contg. >=1 structural unit capable of coordination with methylcarbonyl fragments, comprising >C=C,> C=N-, -S-N left arrow or right arrow P; L' is cyclopentadienyl or a unit of a polymer chain contg. cyclopentadienyl; and if x=0, L' is a unit of a polymer chain contg. cyclopentadienyl. The catalysts are useful for treatment of petrochemical streams and mercaptan-contg. gases and solns. by converting aggressive mercaptans into inactive disulphides. Typical catalysts are cyclohexadieneirontricarbonyl C6H8-Fe(CO)3 (I) bis(acetonitrile)-pi-allylmolybdenumdicarbonyl-chloride (CH3CN)2Mo(C3H5)(CO)2Cl, etc. L'INVENTION CONCERNE L'INDUSTRIE CHIMIQUE.LE PROCEDE FAISANT L'OBJET DE L'INVENTION EST CARACTERISE EN CE QU'IL EST CONSTITUE PAR UN COMPOSE REPONDANT A LA FORMULE GENERALE SUIVANTE: LLMM(CO)DANS LAQUELLE:X EST UN NOMBRE ENTIER DE 0 A 4,X, EST UN NOMBRE ENTIER DE 0 A 4,Y EST UN NOMBRE ENTIER DE 0 A 4,Y 0 OU 1,Z EST UN NOMBRE ENTIER DE 1 A 14,ETANT ENTENDU QUE LORSQUE X 0, ON A X 1 A 3, ET QUE LORSQUE Y0, ON A Y1,M EST FE,M EST UN METAL DES GROUPES VI, VII, VIII DE LA CLASSIFICATION PERIODIQUE DES ELEMENTS,L EST UNE MOLECULE MONOMERE OU UN MOTIF DE CHAINE POLYMERE, CONTENANT AU MOINS UNE UNITE STRUCTURALE CAPABLE DE COORDINATION AVEC DES FRAGMENTS DE METAUX CARBONYLES, A SAVOIR: CC, CN-, -S-, -N OU -PL EST UN CYCLOPENTADIENYLE OU UN MOTIF DE CHAINE POLYMERE CONTENANT UN CYCLOPENTADIENYLE,ETANT ENTENDU QUE SI X 0, ALORS L EST UN MOTIF DE CHAINE POLYMERE, CONTENANT UN CYCLOPENTADIENYLE.L'INVENTION PEUT ETRE UTILISEE NOTAMMENT POUR LE RAFFINAGE DES DERIVES DU PETROLE, AINSI QUE DES GAZ ET DES SOLUTIONS CONTENANT DES MERCAPTANS DANS DIVERS SOLVANTS ORGANIQUES.
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KUKINA, A. S. DEKHTERMAN, A. G. LEBEDEVA, D. A. MKHITAROVA, V. I. IVANOV, M. MAVLONOV, N. V. ALYMOVA, S. L. DAVYDOVA, A. N. MURATOV, V. S. LUPANDIN ET M. S. MATVEEV</creator><creatorcontrib>N. S. NAMETKIN, V. M. SOBOLEV, V. D. TJURIN, A. I. NEKHAEV, L. I. LARIONOV, L. A. NEKHAEVA, N. B. ZHADANOVSKY, M. A. KUKINA, A. S. DEKHTERMAN, A. G. LEBEDEVA, D. A. MKHITAROVA, V. I. IVANOV, M. MAVLONOV, N. V. ALYMOVA, S. L. DAVYDOVA, A. N. MURATOV, V. S. LUPANDIN ET M. S. MATVEEV</creatorcontrib><description>Catalysts for purifying liq. and gaseous industrial mixts. contg. mercaptane, have the formula LxL'X', MyM'y', (CO)z in which x=0-4; x'=0-4; y=0-4; y'=0 or 1; z=1-14; if x=0, x'=1-3; if y=0, y'=1; M is Fe; M' is a gp. VI, VII or VIII metal; L is a monomer mol. or a unit of a polymer chain contg. &gt;=1 structural unit capable of coordination with methylcarbonyl fragments, comprising &gt;C=C,&gt; C=N-, -S-N left arrow or right arrow P; L' is cyclopentadienyl or a unit of a polymer chain contg. cyclopentadienyl; and if x=0, L' is a unit of a polymer chain contg. cyclopentadienyl. The catalysts are useful for treatment of petrochemical streams and mercaptan-contg. gases and solns. by converting aggressive mercaptans into inactive disulphides. Typical catalysts are cyclohexadieneirontricarbonyl C6H8-Fe(CO)3 (I) bis(acetonitrile)-pi-allylmolybdenumdicarbonyl-chloride (CH3CN)2Mo(C3H5)(CO)2Cl, etc. L'INVENTION CONCERNE L'INDUSTRIE CHIMIQUE.LE PROCEDE FAISANT L'OBJET DE L'INVENTION EST CARACTERISE EN CE QU'IL EST CONSTITUE PAR UN COMPOSE REPONDANT A LA FORMULE GENERALE SUIVANTE: LLMM(CO)DANS LAQUELLE:X EST UN NOMBRE ENTIER DE 0 A 4,X, EST UN NOMBRE ENTIER DE 0 A 4,Y EST UN NOMBRE ENTIER DE 0 A 4,Y 0 OU 1,Z EST UN NOMBRE ENTIER DE 1 A 14,ETANT ENTENDU QUE LORSQUE X 0, ON A X 1 A 3, ET QUE LORSQUE Y0, ON A Y1,M EST FE,M EST UN METAL DES GROUPES VI, VII, VIII DE LA CLASSIFICATION PERIODIQUE DES ELEMENTS,L EST UNE MOLECULE MONOMERE OU UN MOTIF DE CHAINE POLYMERE, CONTENANT AU MOINS UNE UNITE STRUCTURALE CAPABLE DE COORDINATION AVEC DES FRAGMENTS DE METAUX CARBONYLES, A SAVOIR: CC, CN-, -S-, -N OU -PL EST UN CYCLOPENTADIENYLE OU UN MOTIF DE CHAINE POLYMERE CONTENANT UN CYCLOPENTADIENYLE,ETANT ENTENDU QUE SI X 0, ALORS L EST UN MOTIF DE CHAINE POLYMERE, CONTENANT UN CYCLOPENTADIENYLE.L'INVENTION PEUT ETRE UTILISEE NOTAMMENT POUR LE RAFFINAGE DES DERIVES DU PETROLE, AINSI QUE DES GAZ ET DES SOLUTIONS CONTENANT DES MERCAPTANS DANS DIVERS SOLVANTS ORGANIQUES.</description><language>eng ; fre</language><subject>CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY ; CHEMISTRY ; CRACKING HYDROCARBON OILS ; FUELS ; LUBRICANTS ; METALLURGY ; MINERAL WAXES ; PEAT ; PERFORMING OPERATIONS ; PETROLEUM, GAS OR COKE INDUSTRIES ; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL ; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION ; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES ; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS ; REFORMING OF NAPHTHA ; SEPARATION ; TECHNICAL GASES CONTAINING CARBON MONOXIDE ; THEIR RELEVANT APPARATUS ; TRANSPORTING</subject><creationdate>1980</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19800425&amp;DB=EPODOC&amp;CC=FR&amp;NR=2437243A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19800425&amp;DB=EPODOC&amp;CC=FR&amp;NR=2437243A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>N. S. NAMETKIN, V. M. SOBOLEV, V. D. TJURIN, A. I. NEKHAEV, L. I. LARIONOV, L. A. NEKHAEVA, N. B. ZHADANOVSKY, M. A. KUKINA, A. S. DEKHTERMAN, A. G. LEBEDEVA, D. A. MKHITAROVA, V. I. IVANOV, M. MAVLONOV, N. V. ALYMOVA, S. L. DAVYDOVA, A. N. MURATOV, V. S. LUPANDIN ET M. S. MATVEEV</creatorcontrib><title>Catalysts for purifying liq. and gas mixts. contg. mercaptan(s) - e.g. for treating petrochemical streams, convert mercaptan(s) into di:sulphide cpds</title><description>Catalysts for purifying liq. and gaseous industrial mixts. contg. mercaptane, have the formula LxL'X', MyM'y', (CO)z in which x=0-4; x'=0-4; y=0-4; y'=0 or 1; z=1-14; if x=0, x'=1-3; if y=0, y'=1; M is Fe; M' is a gp. VI, VII or VIII metal; L is a monomer mol. or a unit of a polymer chain contg. &gt;=1 structural unit capable of coordination with methylcarbonyl fragments, comprising &gt;C=C,&gt; C=N-, -S-N left arrow or right arrow P; L' is cyclopentadienyl or a unit of a polymer chain contg. cyclopentadienyl; and if x=0, L' is a unit of a polymer chain contg. cyclopentadienyl. The catalysts are useful for treatment of petrochemical streams and mercaptan-contg. gases and solns. by converting aggressive mercaptans into inactive disulphides. Typical catalysts are cyclohexadieneirontricarbonyl C6H8-Fe(CO)3 (I) bis(acetonitrile)-pi-allylmolybdenumdicarbonyl-chloride (CH3CN)2Mo(C3H5)(CO)2Cl, etc. L'INVENTION CONCERNE L'INDUSTRIE CHIMIQUE.LE PROCEDE FAISANT L'OBJET DE L'INVENTION EST CARACTERISE EN CE QU'IL EST CONSTITUE PAR UN COMPOSE REPONDANT A LA FORMULE GENERALE SUIVANTE: LLMM(CO)DANS LAQUELLE:X EST UN NOMBRE ENTIER DE 0 A 4,X, EST UN NOMBRE ENTIER DE 0 A 4,Y EST UN NOMBRE ENTIER DE 0 A 4,Y 0 OU 1,Z EST UN NOMBRE ENTIER DE 1 A 14,ETANT ENTENDU QUE LORSQUE X 0, ON A X 1 A 3, ET QUE LORSQUE Y0, ON A Y1,M EST FE,M EST UN METAL DES GROUPES VI, VII, VIII DE LA CLASSIFICATION PERIODIQUE DES ELEMENTS,L EST UNE MOLECULE MONOMERE OU UN MOTIF DE CHAINE POLYMERE, CONTENANT AU MOINS UNE UNITE STRUCTURALE CAPABLE DE COORDINATION AVEC DES FRAGMENTS DE METAUX CARBONYLES, A SAVOIR: CC, CN-, -S-, -N OU -PL EST UN CYCLOPENTADIENYLE OU UN MOTIF DE CHAINE POLYMERE CONTENANT UN CYCLOPENTADIENYLE,ETANT ENTENDU QUE SI X 0, ALORS L EST UN MOTIF DE CHAINE POLYMERE, CONTENANT UN CYCLOPENTADIENYLE.L'INVENTION PEUT ETRE UTILISEE NOTAMMENT POUR LE RAFFINAGE DES DERIVES DU PETROLE, AINSI QUE DES GAZ ET DES SOLUTIONS CONTENANT DES MERCAPTANS DANS DIVERS SOLVANTS ORGANIQUES.</description><subject>CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY</subject><subject>CHEMISTRY</subject><subject>CRACKING HYDROCARBON OILS</subject><subject>FUELS</subject><subject>LUBRICANTS</subject><subject>METALLURGY</subject><subject>MINERAL WAXES</subject><subject>PEAT</subject><subject>PERFORMING OPERATIONS</subject><subject>PETROLEUM, GAS OR COKE INDUSTRIES</subject><subject>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</subject><subject>PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION</subject><subject>RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES</subject><subject>REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS</subject><subject>REFORMING OF NAPHTHA</subject><subject>SEPARATION</subject><subject>TECHNICAL GASES CONTAINING CARBON MONOXIDE</subject><subject>THEIR RELEVANT APPARATUS</subject><subject>TRANSPORTING</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1980</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNqNy7EKwkAQBNA0FqL-w5YKJqARBDsJBmuxD8tlkxxc7s7bjZgP8X_NgY2dxTAwzJsn7wIFzcjC0LgAfgi6GbVtwehHBmhraJGh1y_hDJSz0mbQU1DoBe2aN5ACZdMWsQRCidaTBKc66rVCAxz3nreRPynIr9dWHNT6xIPxna4JlK95mcwaNEyrby8SKC_34pqSdxWxR0WWpCpv-0N-nHLe5X9cPpsGTzM</recordid><startdate>19800425</startdate><enddate>19800425</enddate><creator>N. S. NAMETKIN, V. M. SOBOLEV, V. D. TJURIN, A. I. NEKHAEV, L. I. LARIONOV, L. A. NEKHAEVA, N. B. ZHADANOVSKY, M. A. KUKINA, A. S. DEKHTERMAN, A. G. LEBEDEVA, D. A. MKHITAROVA, V. I. IVANOV, M. MAVLONOV, N. V. ALYMOVA, S. L. DAVYDOVA, A. N. MURATOV, V. S. LUPANDIN ET M. S. MATVEEV</creator><scope>EVB</scope></search><sort><creationdate>19800425</creationdate><title>Catalysts for purifying liq. and gas mixts. contg. mercaptan(s) - e.g. for treating petrochemical streams, convert mercaptan(s) into di:sulphide cpds</title><author>N. S. NAMETKIN, V. M. SOBOLEV, V. D. TJURIN, A. I. NEKHAEV, L. I. LARIONOV, L. A. NEKHAEVA, N. B. ZHADANOVSKY, M. A. KUKINA, A. S. DEKHTERMAN, A. G. LEBEDEVA, D. A. MKHITAROVA, V. I. IVANOV, M. MAVLONOV, N. V. ALYMOVA, S. L. DAVYDOVA, A. N. MURATOV, V. S. LUPANDIN ET M. S. MATVEEV</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_FR2437243A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre</language><creationdate>1980</creationdate><topic>CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY</topic><topic>CHEMISTRY</topic><topic>CRACKING HYDROCARBON OILS</topic><topic>FUELS</topic><topic>LUBRICANTS</topic><topic>METALLURGY</topic><topic>MINERAL WAXES</topic><topic>PEAT</topic><topic>PERFORMING OPERATIONS</topic><topic>PETROLEUM, GAS OR COKE INDUSTRIES</topic><topic>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</topic><topic>PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION</topic><topic>RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES</topic><topic>REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS</topic><topic>REFORMING OF NAPHTHA</topic><topic>SEPARATION</topic><topic>TECHNICAL GASES CONTAINING CARBON MONOXIDE</topic><topic>THEIR RELEVANT APPARATUS</topic><topic>TRANSPORTING</topic><toplevel>online_resources</toplevel><creatorcontrib>N. S. NAMETKIN, V. M. SOBOLEV, V. D. TJURIN, A. I. NEKHAEV, L. I. LARIONOV, L. A. NEKHAEVA, N. B. ZHADANOVSKY, M. A. KUKINA, A. S. DEKHTERMAN, A. G. LEBEDEVA, D. A. MKHITAROVA, V. I. IVANOV, M. MAVLONOV, N. V. ALYMOVA, S. L. DAVYDOVA, A. N. MURATOV, V. S. LUPANDIN ET M. S. MATVEEV</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>N. S. NAMETKIN, V. M. SOBOLEV, V. D. TJURIN, A. I. NEKHAEV, L. I. LARIONOV, L. A. NEKHAEVA, N. B. ZHADANOVSKY, M. A. KUKINA, A. S. DEKHTERMAN, A. G. LEBEDEVA, D. A. MKHITAROVA, V. I. IVANOV, M. MAVLONOV, N. V. ALYMOVA, S. L. DAVYDOVA, A. N. MURATOV, V. S. LUPANDIN ET M. S. MATVEEV</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Catalysts for purifying liq. and gas mixts. contg. mercaptan(s) - e.g. for treating petrochemical streams, convert mercaptan(s) into di:sulphide cpds</title><date>1980-04-25</date><risdate>1980</risdate><abstract>Catalysts for purifying liq. and gaseous industrial mixts. contg. mercaptane, have the formula LxL'X', MyM'y', (CO)z in which x=0-4; x'=0-4; y=0-4; y'=0 or 1; z=1-14; if x=0, x'=1-3; if y=0, y'=1; M is Fe; M' is a gp. VI, VII or VIII metal; L is a monomer mol. or a unit of a polymer chain contg. &gt;=1 structural unit capable of coordination with methylcarbonyl fragments, comprising &gt;C=C,&gt; C=N-, -S-N left arrow or right arrow P; L' is cyclopentadienyl or a unit of a polymer chain contg. cyclopentadienyl; and if x=0, L' is a unit of a polymer chain contg. cyclopentadienyl. The catalysts are useful for treatment of petrochemical streams and mercaptan-contg. gases and solns. by converting aggressive mercaptans into inactive disulphides. Typical catalysts are cyclohexadieneirontricarbonyl C6H8-Fe(CO)3 (I) bis(acetonitrile)-pi-allylmolybdenumdicarbonyl-chloride (CH3CN)2Mo(C3H5)(CO)2Cl, etc. L'INVENTION CONCERNE L'INDUSTRIE CHIMIQUE.LE PROCEDE FAISANT L'OBJET DE L'INVENTION EST CARACTERISE EN CE QU'IL EST CONSTITUE PAR UN COMPOSE REPONDANT A LA FORMULE GENERALE SUIVANTE: LLMM(CO)DANS LAQUELLE:X EST UN NOMBRE ENTIER DE 0 A 4,X, EST UN NOMBRE ENTIER DE 0 A 4,Y EST UN NOMBRE ENTIER DE 0 A 4,Y 0 OU 1,Z EST UN NOMBRE ENTIER DE 1 A 14,ETANT ENTENDU QUE LORSQUE X 0, ON A X 1 A 3, ET QUE LORSQUE Y0, ON A Y1,M EST FE,M EST UN METAL DES GROUPES VI, VII, VIII DE LA CLASSIFICATION PERIODIQUE DES ELEMENTS,L EST UNE MOLECULE MONOMERE OU UN MOTIF DE CHAINE POLYMERE, CONTENANT AU MOINS UNE UNITE STRUCTURALE CAPABLE DE COORDINATION AVEC DES FRAGMENTS DE METAUX CARBONYLES, A SAVOIR: CC, CN-, -S-, -N OU -PL EST UN CYCLOPENTADIENYLE OU UN MOTIF DE CHAINE POLYMERE CONTENANT UN CYCLOPENTADIENYLE,ETANT ENTENDU QUE SI X 0, ALORS L EST UN MOTIF DE CHAINE POLYMERE, CONTENANT UN CYCLOPENTADIENYLE.L'INVENTION PEUT ETRE UTILISEE NOTAMMENT POUR LE RAFFINAGE DES DERIVES DU PETROLE, AINSI QUE DES GAZ ET DES SOLUTIONS CONTENANT DES MERCAPTANS DANS DIVERS SOLVANTS ORGANIQUES.</abstract><oa>free_for_read</oa></addata></record>
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subjects CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
CRACKING HYDROCARBON OILS
FUELS
LUBRICANTS
METALLURGY
MINERAL WAXES
PEAT
PERFORMING OPERATIONS
PETROLEUM, GAS OR COKE INDUSTRIES
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION
RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES
REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS
REFORMING OF NAPHTHA
SEPARATION
TECHNICAL GASES CONTAINING CARBON MONOXIDE
THEIR RELEVANT APPARATUS
TRANSPORTING
title Catalysts for purifying liq. and gas mixts. contg. mercaptan(s) - e.g. for treating petrochemical streams, convert mercaptan(s) into di:sulphide cpds
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