СПОСОБ ПОЛУЧЕНИЯ ЦИКЛОПЕНТЕНА

Использование: для синтеза медицинского препарата "кетамин", а также в качестве мономера. Способ получения циклопентана включает деполимеризацию дициклопентадиена, отгонку полученного циклопентадиена от высококипящих примесей, гидрирование циклопентадиена на палладийсодержащем катализаторе и выделение полученного циклопентена, в котором деполимеризацию ведут в жидкой фазе при 160 - 165°С и времени пребывания в зоне деполимеризации 3 - 4 ч с одновременной отгонкой циклопентадиена от высококипящих примесей, гидрирование циклопентадиена приводят в жидкой фазе при 30 - 40°С, давлении 0,3 - 0,4 МПа и времени пребывания жидкого потока в зоне гидрирования 1 - 1,5 ч, далее полученный циклопентен выделяют и очищают путем димеризации непрореагировавшего циклопентадиена, отгонки циклопентенсодержащей фракции от дициклопентадиена, контактирования отогнанной фракции с четыреххлористым титаном или бромистым алюминием с одновременной ректификацией, контактирования полученного циклопентена с триизобутилалюминием ...

Способ очистки циклопентена

VERFAHREN ZUR HERSTELLUNG VON OLEFINISCH UNGESAETTIGTEN ALIPHATISCHEN ODER CYCLOALIPHATISCHEN KOHLENWASSERSTOFFEN

CYCLOPENTADIENE HYDROFENATION

Cyclopentadiene Hydrogenation

A process for the preparation of cyclopentene which comprises selectively hydrogenating cyclopentadiene in the liquid phase by contacting cyclopentadiene with hydrogen in the presence of a hydrogenation catalyst comprising a highly dispersed form of nickel in which the reaction mixture employed comprises: water; water containing one or more anionic, cationic, non-ionic, amphoteric, oil soluble or naturally occurring surfactants; or ammonium hydroxide.

Continuous hydrogenation of cyclopentadiene

There is disclosed a process for the preparation of cyclopentene from cyclopentadiene which comprises selectively hydrogenating cyclopentadiene in the liquid phase by continuously contacting cyclopentadiene with hydrogen while passing the mixture of hydrogen and cyclopentadiene through a highly dispersed form of nickel catalyst which nickel has been treated with ammonia.

Therapeutic Nucleosides

The present invention relates to 6-substituted purine carbocyclic nucleosides and their use in medical therapy particularly in the treatment and prophylaxis of HIV and HBV infections. Also provided are pharmaceutical formulations and processes for the preparation of compounds according to the invention.

THERAPEUTIC NUCLEOSIDES

METAL COMPLEXES FOR THE METATHESE

THERAPEUTIC NULEOSIDE.

Procedure for the production of technically pure Cyclopenten

Hydrocarbon hydrogenation catalyst and process

RECOVERY OF PURE CYCLOPENTENE

HYDROGENATION OF CYCLOPENTADIENE TO FORM CYCLOPENTENE

IMPROVEMENT IN HYDROGENATION OF CYCLOPENTADIENE TO FORM CYCLOPENTENE There is disclosed an improved process for selectively hydrogenating cyclopentadiene to form cyclopentene in the presence of a catalyst comprising (A) a hydrocarbon-soluble nickel compound such as nickel salts of carboxylic acids or organo nickel compounds, (B) an organo reducing agent such as organoaluminum compounds or lithium alkyl compounds and (C) pyridine, the improvement being that the soluble nickel compound and the pyridine are employed in amounts wherein the mole ratio of aluminum or lithium to the nickel ranges from 7/1 to 11/1 and the mole ratio of the pyridine to the nickel compound ranges from 1/1 to 2.5/1.

REARRANGEMENT OF HEPTADIENE-1,6

REARRANGEMENT OF HEPTADIENE-1,6 Rearrangement of heptadiene-1,6 into 1-methyl-2-methylidenecyclopentene is effected in the presence of a .pi.-allylnickel halide/azaphospholene complex and a Lewis acid.

PROCESS FOR OBTAINING HIGH-PURITY CYCLOPENTENE

THEREPEUTIC NUCLEOSIDES

The present invention relates to 6-substituted purine carbocyclic nucleosides and their use in medical therapy particularly in the treatment and prophylaxis of HIV anal HBV infections. Also provided are pharmaceutical formulations and processes for the preparation of compounds according to the invention.

RHENIUM ALKYLIDENE CATALYSTS FIXED ON A CARRIER AND USED FOR THE METATHESIS OF OLEFINS

The invention relates to a novel, heterogeneous catalyst which is especially suitable for the metathesis of olefins, in addition to the production and corresponding use of the same. Said catalyst is fixed on an inorganic carrier and contains at least one active rhenium compound having at least one carbene group and optionally other functional groups. The rhenium compound is bonded to the material used as the carrier by a chemical bond. Preferably, a catalyst is used, which corresponds to formula (III) wherein S is a suitable carrier, preferably SiO2, and R1, R2 and R3 independently represent a linear or branched C1-C5 alkyl group, preferably a tert-butyl group.

PROCESS OF ISOPRENE OR BUTADIENE PURIFICATION

PROCEDE DE PREPARATION DE CYCLOPENTENE

L'INVENTION A POUR OBJET UN PROCEDE DE PREPARATION DE CYCLOPENTENE QUI CONSISTE A HYDROGENER SELECTIVEMENT DU CYCLOPENTADIENE EN PHASE LIQUIDE PAR MISE EN CONTACT DU CYCLOPENTADIENE AVEC DE L'HYDROGENE EN PRESENCE D'UN CATALYSEUR D'HYDROGENATION COMPRENANT UNE FORME HAUTEMENT DISPERSEE DE NICKEL, CARACTERISE EN CE QUE L'ON UTILISE DANS LE MILIEU DE REACTION UN POLYOL CHOISI PARMI LE 1,2-ETHANEDIOL, LE 1,2-PROPANEDIOL, LE 1,3-PROPANEDIOL, LE 1,2,3-PROPANETRIOL, LE 1,2-BUTANEDIOL, LE 1,4-BUTANEDIOL, LE 1,3-BUTANEDIOL, LE 1,2,4-BUTANETRIOL ET LE 1,2,3-PROPANETRIOL.

Process of obtaining cyclopentene starting from dicyclopentadiene

Recovering (2-methyl-)-1,3-butadiene - from mixt. of 4-5C hydrocarbon(s), by extractive distn. using selective solvent

СПОСОБ ПОЛУЧЕНИЯ ДИЕНОВЫХ ИЛИ ЦИКЛИЧЕСКИХ УГЛЕВОДОРОДОВ

... 1. Способ получения диеновых или циклических углеводородов дегидрированием или дегидроциклизацией ациклических насыщенных или ненасыщенных углеводородов или их смесей, проводимый циклами контактирования исходного сырья с катализатором, содержащим платину и олово на алюмоцинковой шпинели, при повышенной температуре в присутствии водорода и водяного пара и регенерации катализатора паровоздушной смесью с промежуточными между циклами продувками катализатора водяным паром, отличающийся тем, что, с целью увеличения выхода целевых продуктов и продолжительности работа катализатора до регенерации, процесс проводят при подаче водорода в начале контактирования в количестве от 1,7 до 5 молей на моль исходного сырья с постепенным уменьшением его количества в 1,5 - 6 раз к концу контактирования. 2. Способ по п.1, отличающийся тем, что процесс проводят при температуре 535 - 590oC.

CYCLOPENTENE PREPARATION

4 (5) - ACETYL-7,7,9 (7,9,9) - TRIMETHYL BICYCLO (4.3. ) - NON-1-EN, ITS PRODUCTION AND USE AS SMELLING OFF, AS WELL AS THIS CONTAINING SMELLING OFF COMPOSITIONS.

AZAPHOSPHOLENE AND YOUR USE.

INTERLACE-CASH MONOMERS AND COMPOSITION AS WELL AS INTERLACED POLYMERS

HYDROGENATION OF CYCLOPENTADIENE TO FORM CYCLOPENTENE

Catalyst for preparation of cyclopentene from cyclopentadiene and preparation method and application of catalyst

NOUVEAU PROCEDE DE PREPARATION DE CYCLOPENTENE

L'INVENTION A POUR OBJET UN PROCEDE DE PREPARATION DE CYCLOPENTENE QUI CONSISTE A HYDROGENER SELECTIVEMENT DU CYCLOPENTADIENE EN PHASE LIQUIDE PAR MISE EN CONTACT DU CYCLOPENTADIENE AVEC DE L'HYDROGENE EN PRESENCE D'UN CATALYSEUR D'HYDROGENATION COMPRENANT UNE FORME HAUTEMENT DISPERSEE DE NICKEL, CARACTERISE EN CE QUE L'ON UTILISE DANS LE MILIEU DE REACTION UN ALCOOL BOUILLANT AU-DESSUS DE 99C.

Recovery of pure cyclopentene

HYDROGENIZING PROCESS OF the USING CYCLOPENTADIENE OF the SURFACE-ACTIVE AGENTS

PROCESSO PARA PREPARAR CICLOPENTENO

1-octene composition

The present invention relates to a 1-octene composition. The 1-octene composition according to the present invention is prepared by ethylene oligomerization and comprises a high content of 1-octene and monomers useful for copolymerization of 1-octene at the same time.

СПОСОБ ПОЛУЧЕНИЯ ЦИКЛОПЕНТЕНА

Способ получения моноолефинов и их оксипроизводных

Способ получения циклопентена

Способ одновременного получения циклопентена и камфары

Способ получения смеси изомеров метилциклопентена

Способ получения циклопентена и метилциклопентена

RECOVERY OF PURE CYCLOPENTENE

... 1376227 Distilling hydrocarbons BAYER AG 12 June 1972 [2 Dec 1971] 27243/72 Heading C5E Cyclopentene, obtained by thermal splitting of dicyclopentadiene and hydrogenation of the product, is purified by distillation in two stages. The first stage is in a column of 100 to 180 trays, the feed is to the middle of the column, and low-boiling impurities are taken off overhead at a reflux ratio in the range of 5 : 1 to 15 : 1. The bottoms from the first stage has a cyclopentadiene content less than 20 p.p.m. and is fed to a second column, where cyclopentane and other high-boiling impurities remain as bottoms and pure cyclopentene is taken off overhead. The second column may have 60 to 90 trays, and the feed to this column may be to its middle. There may be a preliminary separation in an evaporator with a column of 2 to 10 plates, in which high-boiling impurities remain as bottoms and the overhead stream provides the feed to the first column above. The bottoms from the second column may be recycled ...

CONTINUOUS HYDROGENATION OF CYCLOPENTADIENE

HYDROGENATION OF CYCLOPENTADIENE

PROCEDURE FOR THE SELECTIVE HYDROGENATION FROM DIOLEFINKOHLENWASSERSTOFFEN TO OLEFINKOHLENWASSERSTOFFEN

PROCEDURE FOR THE PRODUCTION OF FIRM DISPERSIONS OF SOUR TETRAVALENT METAL SALTS WITH LAMINATED STRUCTURE IN AN INERT INORGANIC MATRIX AND SO MANUFACTURED PRODUCTS.

Metal complexes for use in metathesis

CONTINUOUS HYDROGENATION OF CYCLOPENTADIENE

INVENTOR: Lawson G. Wideman INVENTION: CONTINUOUS HYDROGENATION OF CYCLOPENTADIENE There is disclosed a process for the preparation of cyclopentene from cyclopentadiene which comprises selectively hydrogenating cyclopentadiene in the liquid phase by continuously contacting cyclopentadiene with hydrogen while passing the mixture of hydrogen and cyclopentadiene through a highly dispersed form of nickel catalyst which nickel has been treated with ammonia.

HYDROGENATION PROCESS

AZAPHOSPHOLENES AND USE THEREOF

NEW AZAPHOSPHOLENES AND USE THEREOF of the disclosure The invention relates to azaphospholenes of the type wherein R1 and R2 may be alkyl, aryl and aralkyl groups, processes for preparing same and the use thereof. These azaphospholenes are useful as modifying ligands in processes for dimerizing or co-dimerizing olefins by means of nickel-containing and phosphane-modified catalysts.

CODIMERIZATION OF AN OLEFIN

CODIMERIZATION OF AN OLEFIN In the codimerization of an olefin employing a .pi.-allylnickel compound as a catalyst, the improvement which comprises employing the .pi.-allylnickel compound in the form of a complex with bis-(3R)-3-((1R,5R,8R)-5,9,9-trimethyl-4- ¢(1R)-1-phenylethyl!-4-aza-5-phosphatricyclo-¢6.1.11.8.02.6!-dec-2(6)-enyl).

PROCESS OF HYDROGENATION

PROCESS FOR THE ALKYLATION OF A CYCLOALKENE

Process for the alkylation of a cycloalkene, which process comprises alkylating a cycloalkene with an oxygenate under alkylating conditions in the presence of a zeolite; to yield an alkylated cycloalkene. Composition obtainable by such a process and use of such a composition as a gasoline blending component.

HYDROCARBON HYDROGENATION AND CATALYST THEREFOR

A supported hydrogenation catalyst composition consists essentially of a palladium component, at least one alkali metal iodide (preferably KI) and an inorganic support material (preferably Al2O3). This catalyst composition is employed in the selective hydrogenation of C3-C12 diolefins with hydrogen gas to the corresponding monoolefins.

MONOMERS AND COMPOSITION WHICH CAN BE CROSSLINKED AND CROSSLINKED POLYMERS

The invention concerns compounds of formula (I) (A)n-B in which A is an extended cycloolefin group, B stands for a direct bond or an n-valent bridging group, and n is an integer from 2 to 8, with the exception of 1,2bisnorbornenyl ethane and norbornene carboxylic acid norbornene methylester. The compounds of formula (I) can be polymerized with single-component catalysts (ring-opening metathesis polymerization).

HYDROGENIZING PROCESS SELECTIVE IN GAS PHASE OF COMPOSE POLYINSATURES

METHOD OF PREPARATION OF CYCLOPENTENE

CATALYSEUR POUR LA CYCLISATION DU PENTADIENE-1,3 EN CYCLOPENTENE ET CYCLOPENTANE, SON PROCEDE DE PREPARATION ET PROCEDE DE PREPARATION SIMULTANEE DU CYCLOPENTENE ET DU CYCLOPENTANE AVEC MISE EN OEUVRE DUDIT CATALYSEUR

LE CATALYSEUR POUR LA CYCLISATION DU PENTADIENE-1,3 EN CYCLOPENTENE ET CYCLOPENTANE SE PRESENTE SOUS LA FORME D'UNE MEMBRANE EN ALLIAGE DE 84,75 A 94,9 MASSIQUES DE PALLADIUM, DE 5 A 14,75 MASSIQUES DE RUTHENIUM OU DE RODHIUM ET DE 0,05 A 0,5 MASSIQUES DE ZINC OU DE GALLIUM, COMPOSEE D'UNE COUCHE NON POREUSE ET D'UNE COUCHE POREUSE DISPOSEE D'UN MEME COTE OU DES DEUX COTES PAR RAPPORT A LA PREMIERE COUCHE, LE RAPPORT DES EPAISSEURS DE LA COUCHE POREUSE A LA COUCHE NON POREUSE ETANT DE 1(5 A 25). LE PROCEDE DE PREPARATION DU CATALYSEUR CONSISTE A DEPOSER A LA SURFACE DE LA MEMBRANE EN ALLIAGE DE PALLADIUM ET DE RUTHENIUM OU DE RHODIUM, DU ZINC OU DU GALLIUM, LAISSER LA MEMBRANE AVEC LE ZINC DEPOSE DESSUS A UNE TEMPERATURE DE 230 A 250 C ET LA MEMBRANE AVEC LE GALLIUM DEPOSE DESSUS A UNE TEMPERATURE DE 30 A 120 C, PUIS EXTRACTION PARTIELLE DU ZINC ET DU GALLIUM EXCEDENTS. LE PROCEDE D'OBTENTION SIMULTANEE DU CYCLOPENTENE ET DU CYCLOPENTANE CONSISTE A CYCLISER LE PENTADIENE-1,3 SUR LEDIT CATALYSEUR ...

OBTAINING PURE CYCLOPENTENE

PROCESSO PARA A PREPARACAO DE CICLOPENTENO

HYDROCARBON HYDROGENATION CATALYST AND PROCESS

A catalyst composition and process for preparing such catalyst composition which can be useful in contacting a hydrocarbon-containing fluid which contains a highly unsaturated hydrocarbon such as 1,3-butadiene, in the presence of hydrogen, with such catalyst composition in a hydrogenation zone under a hydrogenation condition effective to hydrogenate such highly unsaturated hydrocarbon to a less unsaturated hydrocarbon such as n-butene is disclosed. Such process for preparing a catalyst composition includes (1) combining a zeolite, a Group VIB metal, and an inorganic support to form a modified zeolite; (2) calcining such modified zeolite under a calcining condition to produce a calcined, modified zeolite; and (3) contacting such calcined, modified zeolite with a carburizing agent under a carburizing condition to provide such catalyst composition.

Azaphospholenes and use thereof

Method for photocatalytic acceptor-free dehydrogenation of alkanes and alcohols

Die Erfindung betrifft ein Verfahren zur photokatalytischen akzeptorfreien Dehydrierung von Alkanen und Alkoholen, bei dem ein Alkan oder ein Alkohol in Gegenwart einer Rhodiumkomplexverbindung, die organische Phosphor(III)-Verbindungen als Liganden enthält, als Katalysator, sowie in Gegenwart von mindestens einer Lewis Base, bestrahlt wird.

METAL COMPLEXES FOR USE IN METATHESIS

This invention relates to metal complexes which are useful as catalyst components in olefin metathesis reactions, atom or group transfer radical polymerisation or addition reactions and vinylation reactions. It also relates, preferably with respect to a sub-class of said metal complexes, to their use as a component of a catalytic system for the polymerisation of ¿-olefins, and optionally conjugated dienes, with high activity at moderate temperatures. It also relates to obtaining polymers with extremely narrow molecular weight distribution by means of a living polymerisation reaction. It also relates to methods for making said metal complexes and to novel intermediates involved in such methods. It further relates to certain derivatives of the said metal complexes which are suitable for covalent bonding to a carrier, the product of such covalent bonding being useful as a supported catalyst for heterogeneous catalytic reactions. It also relates to the direct one-step synthesis of pyrrole, ...

СПОСОБ ПОЛУЧЕНИЯ 1-ЭТИЛ-2,3-ДИАЛКИЛ(ФЕНИЛ)АЛЮМИНАЦИКЛОПЕНТ-2-ЕНОВ

Способ получения 1-этил-2,3-диалкил(фенил)алюминациклопент-2-енов общей формулы (1): ! ! каталитическим взаимодействием диалкил(фенил)замещенных ацетиленов общей формулы R-≡-R, где R=н-C2H5, н-C3H7, н-C4H9, Ph с EtAlCl2 в присутствии порошка Mg в эфирном растворителе (ТГФ) при комнатной температуре, отличающийся тем, что в качестве катализатора используют Cp2ZrCl2, реакцию проводят в атмосфере этилена в течение 6-8 ч.

Способ получения циклопентана

Способ получения изомеров метилциклопентена

Способ получения циклопентена

Способ получения циклопентена

Способ получения циклопентена или этилена

VERWENDUNG VON ORGANISCHEN DERIVATEN VON RHENIUMOXIDEN ALS KATALYSATOREN ZUR ÄTHENOLYTISCHEN METATHESE OLEFINISCHER VERBINDUNGEN UND VERFAHREN ZUR ÄTHENOLYTISCHEN METATHESE VON OLEFINISCHEN VERBINDUNGEN MIT HILFE DIESER KATALYSATOREN.

PROCESS FOR THE PRODUCTION OF CYCLOPENTENE FROM DICYCLOPENTADIENE

... 1505542 Cyclopentene BAYER AG 22 May 1975 [24 May 1974] 22191/75 Heading C5E A process for the production of cyclopentene from dicyclopentadiene comprises (1) splitting dicyclopentadiene under heat to form cyclopentadiene; (2) partially hydrogenating the cyclopentadiene to form crude cyclopentene containing an impurities fraction boiling at a higher temperature than cyclopentene; (3) distilling the crude cyclopentene to separate the impurities fraction; and (4) recycling at least part of the impurities fraction (predominantly cyclopentane) to step (1). The cyclopentadiene may be selectively hydrogenated in the gas phase in the presence of a palladium catalyst on lithium-aluminium spinel. The dicyclopentadiene may be split in liquid phase at 160-240‹ C.

METAL COMPLEXES FOR THE METATHESE, ATOMIC TRANSFER RADICAL REACTIONS. ADDITION POLYMERIZATION AND VINYLATIONREAKTIONEN, PROCEDURE AND INTERMEDIATE PRODUCTS FOR THEIR PRODUCTION.

CYCLOPENTANE AND CYCLOPENTANE CONTAINING LUBRICANTS.

CYCLOPENTADIENE, YOUR PRODUCTION AND IT ABSTENTION LUBRICANT COMPOSITIONS

VERFAHREN ZUR SELEKTIVEN HYDRIERUNG VON DIOLEFINKOHLENWASSERSTOFFEN ZU OLEFINKOHLENWASSERSTOFFEN

PROCEDURE FOR THE SELECTIVE HYDROGENATION FROM DIOLEFINKOHLENWASSERSTOFFEN TO OLEFINKOHLENWASSERSTOFFEN

PROCESS FOR PREPARING VINYLAROMATIC COMPOUNDS

PROCESS FOR THE SELECTIVE HYDROGENATION IN GASEOUS PHASE OF POLYUNSATURATED COMPOUNDS

HYDROGENATION OF CYCLOPENTADIENE

INVENTOR: Lawson G Wideman INVENTION: HYDROGENATION OF CYCLOPENTADIENE of the Invention There is disclosed a process for the preparation of cyclopentene which comprises selectively hydrogenating cyclopentadiene in the liquid phase by contacting cyclopentadiene with hydrogen in the presence of a hydrogenation catalyst comprising a highly dispersed form of nickel in which an alcohol boiling above 99.degree.C. is employed in the reaction mixture.

FORMATION OF VINYLBICYCLOHEPTANE

FORMATION OF VINYLBICYCLOHEPTANE Optically active vinylbicycloheptane or 3-phenylbutene-1 is formed by the reaction of ethylene with bicycloheptene or a styrene in the presence of a .pi.-allylnickel halide/azaphospholene complex and a Lewis acid.

A cyclopentadiene selective hydrogenation by the production method of the cyclopentene

HYDROGENIZING PROCESS OF the USING CYCLOPENTADIENE OF the SURFACE-ACTIVE AGENTS

Recovery of pure cyclopentene

Selective hydrogenation of hydrocarbons - using organonickel cpds with reducing agents as catalysts

METHOD FOR THE PRODUCTION OF 1-METHYL-1-ALKOXYCYCLOPENTANES

The invention relates to a method for the production of cyclopentane derivatives of formula (I), in which R represents a C1-C10 alkyl group, characterized in that cyclohexanol or cyclohexene or mixtures of both compounds are reacted to 1-methyl-1-cyclopentene (first stage), a C1-C10 alkanol being added subsequently to the double bond of the 1-methyl-1-cyclopentene (second stage).

PROCESS FOR CONVERSION OF ACYCLIC C5 COMPOUNDS TO CYCLIC C5 COMPOUNDS

PROCESS FOR THE PREPARATION OF OPTICALLY ACTIVE CYCLOOLEFINS

A process for the preparation of optically active cycloolefins based upon reaction of optically active dienes in the presence of catalyst compositions comprising molybdenum and tungsten complexes.

СПОСОБ ПОЛУЧЕНИЯ 2,3,4-ТРИАЛКИЛМАГНЕЗАЦИКЛОПЕНТ-2-ЕНОВ

Способ получения 2,3,4-триалкилмагнезациклопент-2-енов общей формулы (I) ! ! отличающийся тем, что дизамещенный ацетилен , (где R1 такие же, как указано выше) взаимодействует с (где R2 такие же, как указано выше) в присутствии катализатора цирконоцендихлорида Cp2ZrCl2 в мольном соотношении:: Cp2ZrCl2=10:(15-24):(0,3-0,6), в атмосфере аргона при нормальном давлении в диэтиловом эфире в течение 4-7 ч.

СПОСОБ ВЫДЕЛЕНИЯ И ОЧИСТКИ ЦИКЛОПЕНТЕНА

Способ выделения и очистки циклопентена путем двухступенчатой ректификации циклопентенсодержащей фракции, отличающийся тем, что, с целью повышения степени очистки циклопентена, ректификацию на первой ступени проводят в присутствии н-пентана в количестве 1,6 - 8,04 мас.ч. на 1 мас.ч. примесей, содержащихся в исходной циклопентенсодержащей фракции.

СПОСОБ СОВМЕСТНОГО ПОЛУЧЕНИЯ ИЗОПРЕНА И ЦИКЛОПЕНТЕНА

... 1. Способ совместного получения изопрена и циклопентена путем контактирования н-пентана с катализатором - алюмо-магниевой шпинелью, содержащей платину, олово и силикат калия, при нагревании и разбавлении сырья водяным паром и водородом, включающий выделение целевых продуктов ректификацией, отличающийся тем, что, с целью повышения выхода целевых продуктов и упрощения технологии процесса, от продуктов контактирования отделяют водородную фракцию, фракцию углеводородов C3 - C4, смолообразные продукты и паровой конденсат и оставшуюся смесь подвергают двухступенчатой экстрактивной ректификации с выделением на первой ступени фракции, содержащей н-пентан, изопентан, н-амилены и изоамилены, которую возвращают на стадию контактирования, и фракции, содержащей циклопентадиен, изопрен и пиперилен, из которой на второй ступени выделяют изопрен и пиперилен-циклопентадиеновую фракцию с последующей подачей последней на стадию гидрирования и выделением из продуктов гидрирования путем ректификации н-пентан-н-амиленовой ...

Способ получения 3-метилциклопентена