Abstract: The invention relates to a method for producing one or more olefins and one or more carboxylic acids, in which one or more paraffins is or are subjected to an oxidative dehydrogenation. For the oxidative dehydrogenation, a reactor (10) having a plurality of reaction zones (11, 12, 13) is used, a gas mixture comprising the one or more paraffins is successively passed through the reaction zones (11, 12, 13), and at least two of the reaction zones (11, 12, 13) are subject to varying temperature influences. The invention also relates to a corresponding system (100).

Abstract: A method of column control includes: passing a feed stream and a make-up stream through a column; withdrawing an overhead fraction from the column; purging at least a portion of the overhead fraction; cooling at least a portion of the overhead fraction in a heat exchanger and passing it through a reflux drum; withdrawing a purge stream and a distillate stream from the reflux drum, wherein the distillate stream has a constant flow rate; recycling at least a portion of the distillate stream back to the column; and passing at least a portion of the distillate stream to a downstream process.

Abstract: A process for producing ethylene and acetic acid is proposed in which an ethane- and oxygen-containing reaction input stream is formed and a portion of the ethane and of the oxygen in the reaction input stream is converted into the ethylene and the acetic acid by oxidative dehydrogenation to obtain a process gas, wherein the process gas contains the unconverted portion of the ethane and of the oxygen, the ethylene and the acetic acid and also water. It is provided that the process comprises adjusting in the process gas a water partial pressure according to a specified product ratio of the acetic acid to the ethylene to a value in a range between 0.7 and 5 bar (abs.). A corresponding plant (100) likewise forms part of the subject matter of the present invention.

Abstract: The invention relates to a process for producing an olefin in which a reaction input stream containing at least one paraffin, oxygen and water is formed and in which a portion of the paraffin and of the oxygen in the reaction input stream is converted into the olefin by oxidative dehydrogenation using a catalyst to obtain a process gas, wherein the process gas contains at least the unconverted portion of the paraffin and of the oxygen, the olefin and the water from the reaction input stream. It is provided that at least one parameter which indicates an activity of the catalyst is determined and that an amount of the water in the reaction input stream is adjusted on the basis of the at least one determined parameter. A corresponding plant (100) likewise forms part of the subject matter of the invention.

Abstract: The present invention relates to a method for preparing a catalyst composition for the oligomerization of ethylene and a respective catalyst composition pre-formation unit.

Abstract: A method for processing an oligomerization product stream includes discharging the oligomerization product stream from an oligomerization reactor through a product outlet line, and heating the oligomerization product stream, heating a wall of the product outlet line, or both. The oligomerization product stream includes solvent, linear alpha olefins, a polymer byproduct, or a combination of at least one of the foregoing. The heating is to a temperature that is greater than the melting temperature of the polymer byproduct present in the oligomerization product stream.

Abstract: A process for producing ethylene and acetic acid is proposed in which an ethane- and oxygen-containing reaction input stream is formed and a portion of the ethane and of the oxygen in the reaction input stream is converted into the ethylene and the acetic acid by oxidative dehydrogenation to obtain a process gas, wherein the process gas contains the unconverted portion of the ethane and of the oxygen, the ethylene and the acetic acid and also water. It is provided that the process comprises adjusting in the process gas a water partial pressure according to a specified product ratio of the acetic acid to the ethylene to a value in a range between 0.7 and 5 bar (abs.). A corresponding plant (100) likewise forms part of the subject matter of the present invention.

Abstract: A method of temperature control includes: passing a feed stream comprising ethylene through a reactor at a feed location; withdrawing an outlet steam comprising linear alpha olefins from the reactor; passing the outlet stream through a condensate vessel, wherein the outlet stream is split into a vapor fraction and a liquid fraction within the condensate vessel; withdrawing the vapor fraction from the condensate vessel and recycling it back to the feed stream; and withdrawing the liquid fraction from the condensate vessel and injecting it into the reactor at an injection location.

Abstract: A method of producing linear alpha olefins includes: introducing a catalyst stream and a first solvent stream to a reactor, wherein the reactor comprises a distributor; introducing a second solvent stream above the distributor, wherein the catalyst stream, the first solvent stream, and the second solvent stream form a reaction solution; introducing a feed stream to the reactor; passing the feed stream through the distributor; and passing the feed stream through the reaction solution, producing an oligomerization reaction forming the linear alpha olefins.

Abstract: The invention relates to a process for producing an olefin in which a reaction input stream containing at least one paraffin, oxygen and water is formed and in which a portion of the paraffin and of the oxygen in the reaction input stream is converted into the olefin by oxidative dehydrogenation using a catalyst to obtain a process gas, wherein the process gas contains at least the unconverted portion of the paraffin and of the oxygen, the olefin and the water from the reaction input stream. It is provided that at least one parameter which indicates an activity of the catalyst is determined and that an amount of the water in the reaction input stream is adjusted on the basis of the at least one determined parameter. A corresponding plant (100) likewise forms part of the subject matter of the invention.

Abstract: A method for preparing a homogenous catalyst for use in preparing a linear alpha olefin includes: preparing a first pre-catalyst solution by mixing a chromium source and a ligand in a first solvent, wherein the first pre-catalyst solution is stored in a first vessel; preparing a second pre-catalyst solution by mixing an organoaluminum compound and a modifier in a second solvent, wherein the second pre-catalyst solution is stored in a second vessel; and simultaneously feeding the first pre-catalyst solution and the second pre-catalyst solution directly into a reaction vessel, wherein the reaction vessel includes a third solvent.

Abstract: A process for flushing an oligomerization reactor is described, including flushing the oligomerization reactor with a flushing medium comprising C6 linear alpha olefins, C8 linear alpha olefins, C10 linear alpha olefins, or a combination including at least one of the foregoing, to provide a purge stream comprising the C6 linear alpha olefins, C8 linear alpha olefins, C10 linear alpha olefins, or a combination including at least one of the foregoing, and a polymer byproduct of an oligomerization reaction. A process for the oligomerization of an olefin is also described, wherein the process includes oligomerizing the olefin in the reactor to form a reaction product stream comprising linear alpha olefins, and subsequently flushing the oligomerization reactor according to the process disclosed herein.

Abstract: A method for preparing a homogenous catalyst for the production of linear alpha olefins includes: preparing a first pre-catalyst solution comprising a modifier and an organoaluminum compound in a first solvent wherein the first pre-catalyst solution is reacted and stored in a first vessel for a period of time of 1 hour to 90 days; preparing a second pre-catalyst solution comprising a second solvent, a ligand, and a chromium containing compound, wherein the second pre-catalyst solution is stored in a second vessel for a period of time of 1 hour to 90 days; and after a period of time, adding the first pre-catalyst solution to a catalyst pre-formation unit; after the same period of time, adding the second pre-catalyst solution to the catalyst pre-formation unit; forming a homogenous catalyst by mixing the first pre-catalyst solution and the second pre-catalyst solution; adding the homogeneous catalyst to a reaction vessel, wherein the reaction vessel comprises an alpha olefin; and forming the linear alpha olefin

Abstract: The present invention relates to a catalyst composition and a process for the oligomerization of ethylene to produce 1-hexene or 1-octene, wherein the catalyst composition comprises a chromium compound; an NPNPN ligand of the formula (R1) (R2)N—P(R3)—N(R4)—P(R5)—N(R6)(R7), wherein R1, R2, R3, R4, R5, R6 and R7 are each independently hydrogen, halogen, amino, trimethylsilyl or C1-C20 hydrocarbyl, preferably straight-chain or branched C1-C10 alkyl, phenyl, C6-C20 aryl or C6-C20 alkyl-substituted phenyl.

Abstract: A process for deactivation of an olefin oligomerization catalyst is described, including contacting a catalyst composition with a catalyst quenching medium to form a deactivated catalyst composition, and recovering excess catalyst quenching medium. The catalyst quenching medium includes an alcohol having at least 6 carbon atoms, an organic amine, an amino alcohol, or a combination comprising at least one of the foregoing. The catalyst quenching medium is present in a molar ratio of catalyst quenching medium to catalyst of at least 3:1. A process for the oligomerization of an olefin is also described, including feeding the olefin, a solvent, and a catalyst composition into a reactor, oligomerizing the olefin in the reactor to form a reaction product stream including linear alpha olefins, solvent, and the catalyst composition, and contacting the reaction product stream with a catalyst quenching medium.

Abstract: A catalyst composition including: (a) a chromium compound; (b) a ligand of the general structure R1R2P—N(R3)—P(XR7)2, wherein X is O or S, R1, R2, and R3 are each independently C1-C10-alkyl, C6-C20-cycloalkyl, arylalkyl, alkylaryl, or trialkylsilyl, or any cyclic derivatives of the ligand, wherein at least one of the P or N atoms of the PNP-unit is a member of the ring system, the ring system being formed from one or more constituent compounds of the ligand by substitution, and R7 is C1-C10-alkyl, C3-C10-cycloalkyl, arylalkyl, or trialkylsilyl; and (c) an activator or co-catalyst.

Abstract: A catalyst composition including: (a) a chromium compound; (b) a ligand of the general structure R1R2P—N(R3)—P(R4)—NR5R6 or??(A) R1R2P—N(R3)—P(XR7)R8 or R1R2P—N(R3)—P(XR7)2, with X?O or S,??(B) wherein R1, R2, R3, R4, R5, R6, R7 and R8 are independently C1-C10-alkyl, C6-C20-aryl, C3-C10-cycloalkyl, aralkyl, alkylaryl, or trialkylsilyl, or any cyclic derivatives of (A) and (B), wherein at least one of the P or N atoms of the PNPN-unit or PNP-unit is a member of the ring system, the ring system being formed from one or more constituent compounds of structures (A) or (B) by substitution; and (c) an activator or co-catalyst; and a process for tri- and/or tetramerization.

Abstract: A method for processing an oligomerization product stream includes discharging the oligomerization product stream from an oligomerization reactor through a product outlet line, and heating the oligomerization product stream, heating a wall of the product outlet line, or both. The oligomerization product stream includes solvent, linear alpha olefins, a polymer byproduct, or a combination of at least one of the foregoing. The heating is to a temperature that is greater than the melting temperature of the polymer byproduct present in the oligomerization product stream.

Abstract: The present invention relates to a process for the oligomerization of ethylene, comprising: a) oligomerization of ethylene in a reactor in the presence of solvent and catalyst; b) transferring reactor overhead effluent to an externally located cooling device and recycling condensed effluent into the reactor; c) transferring the reactor bottom effluent to a series of fractionation columns and, in the following order, i) optionally separating a C4 fraction, ii) separating a C6 fraction, iii) simultaneously separating C8 and C10 fractions and recycling thereof into the reactor , and iv) separating residues comprising ?C12 fractions, spent catalyst polymer material and quench media, from the process, wherein the solvent is separated in any of the steps i)-iv)and/or in an additional step.

Abstract: A process for deactivation of an olefin oligomerization catalyst is described, including contacting a catalyst composition with a catalyst quenching medium to form a deactivated catalyst composition, and recovering excess catalyst quenching medium. The catalyst quenching medium includes an alcohol having at least 6 carbon atoms, an organic amine, an amino alcohol, or a combination comprising at least one of the foregoing. The catalyst quenching medium is present in a molar ratio of catalyst quenching medium to catalyst of at least 3:1. A process for the oligomerization of an olefin is also described, including feeding the olefin, a solvent, and a catalyst composition into a reactor, oligomerizing the olefin in the reactor to form a reaction product stream including linear alpha olefins, solvent, and the catalyst composition, and contacting the reaction product stream with a catalyst quenching medium.