Removal of Permanganate Reducing Compounds from Intermediate Gaa Process Streams

Content Provider	The Lens
Description	L'invention concerne un procédé de production d'acide acétique, le procédé comprenant : réaction de méthanol et/ou de dérivés de méthanol avec du monoxyde de carbone en présence d'un milieu réactionnel liquide dans des conditions de carbonylation pour former un produit de carbonylation comprenant de l'acide acétique et une ou plusieurs impuretés oxydables ; et mise en contact d'au moins une partie du produit de carbonylation ou d'un dérivé de celui-ci avec un adsorbant dans des conditions d'adsorption pour fournir un produit purifié comprenant une concentration réduite d'au moins l'une de ou des impuretés oxydables par rapport à une concentration de celui-ci dans la ou les parties du produit de carbonylation ou de son dérivé. L'invention concerne aussi un système permettant d'effectuer le procédé.
Abstract	A method of producing acetic acid, the method comprising: reacting methanol and/or methanol derivatives with carbon monoxide in the presence of a liquid reaction medium under carbonylation conditions to form, a carbonylation product comprising acetic acid and one or more oxidizable impurities; and contacting at least a portion of the carbonylation product or a derivative thereof with an adsorbent at adsorption conditions to provide a purified product comprising a reduced concentration of at least one of the one or more oxidizable impurities relative to a concentration thereof in the at least a portion of the carbonylation product or the derivative thereof. A system for carrying out the method is also provided.
Related Links	https://www.lens.org/lens/patent/009-307-427-022-502/frontpage
Language	English
Publisher Date	2019-09-26
Access Restriction	Open
Alternative Title	Élimination De Composés Réducteurs De Permanganate À Partir De Flux Intermédiaires De Traitement De Gaa
Content Type	Text
Resource Type	Patent
Date Applied	2019-03-22
Agent	Streeter, Leslie Et Al.
Applicant	Lyondellbasell Acetyls Llc
Application No.	2019023691
Claim	CLAIMS What is claimed is: A method of producing acetic acid, the method comprising: reacting methanol and/or methanol derivatives with carbon monoxide in the presence of a liquid reaction medium under carbonylation conditions to form a carbonylation product comprising acetic acid and one or more oxidizable impurities; and contacting at least a portion of the carbonylation product or a derivative thereof with an adsorbent at adsorption conditions to provide a purified product comprising a reduced concentration of at least one of the one or more oxidizable impurities relative to a concentration thereof in the at least a portion of the carbonylation product or the derivative thereof. The method of claim 1, wherein the one or more oxidizable impurities are selected from saturated carbonyl compounds, unsaturated carbonyl compounds, aidol condensation products thereof, propionic acid, or combinations thereof. The method of claim 2, wherein the one or more oxidizable impurities are selected from acetaldehyde, acetone, methyl ethyl ketone, butyraldehyde, crotonaldehyde, 2-ethyl crotonaldehyde, 2-ethyl butyraldehyde, aidol condensation products thereof, propionic acid, or combinations thereof. The method of claim 1, wherein the adsorbent comprises a zeolite, an acidic ion exchange resm, a silicate, or a combination thereof. The method of claim 4, wherein die zeolite comprises a nanozeolite having an average particle size of less than or equal to 300 inn. Tire method of claim 1, wherein the adsorbent has a silica to alumina (Si/Al) molar ratio of greater than or equal to 20/1. The method of claim 1, wherein the contacting of the at least a portion of the carbonylation product or the derivative thereof is effected in the presence of at least 30 weight percent (wt%) water, wherein the at least a portion of the carbonylation product or the derivative thereof comprises less than or equal to 70 wt% acetic acid, or both. The method of claim 1 further comprising: flashing the carbonylation produet to separate a vapor fraction comprising a majority of the acetic acid in the carbonylation product from a liquid fraction; subjecting the vapor fraction to a light ends distillation to separate a lights overhead stream having a boiling point less than that of acetic acid and an acetic acid stream; introducing the lights overhead stream into a separator to form, relative to each stream, a light aqueous phase comprising acetic acid and water, and a heavy organic phase; or a combination thereof, wherein the at least a postion of the carbonyiation product or the derivative thereof contacted with the adsorbent comprises at least a portion of the light aqueous phase. flashing the carbonyiation product to separate a vapor fraction comprising a majority of the acetic acid in the carbonyiation product from a liquid fraction; subjecting the vapor fraction to a light ends distillation to separate a lights overhead stream having a boiling point less than that of acetic acid and an acetic acid stream; and passing the acetic acid stream thsOugh a drying column to remove water therefrom, thus providing a bottoms dried acetic acid stream and an overhead drying column water stream, wherein the contacting of the at least a portion of the carbonyiation product or the derivative thereof with the adsorbent comprises contacting at least a portion of the overhead dr ing column water stream with the adsorbent. Tire method of claim 1 further comprising: flashing the carbonyiation product to separate a vapor fraction comprising a majority of the acetic acid in the carbonyiation product from a liquid fraction; subjecting the vapor fraction to a light ends distillation to separate a lights overhead stream having a boiling point less than that of acetic acid and an acetic acid stream; introducing the lights overhead stream into a separator to form, relative to each stream, a light aqueous phase comprising acetic acid and water, and a heavy organic phase; and sub j ecting the light aqueous phase to distillation, aqueous extraction, or both, thus providing a light phase aqueous solution comprising oxidizable impurities; subjecting the heavy organic phase to distillation and aqueous extraction, thus providing a heavy phase aqueous solution comprising oxidizable impurities; or both, wherein the at least a portion of the carbonyiation product or the derivative thereof contacted with the adsorbent comprises the light phase aqueous solution, the heavy phase aqueous solution, or both. The method of claim 1, wherein the contacting is performed at a temperature of room temperature, or less than or equal to 70°C, wherein the at least a portion of the carbonyiation product or the derivative thereof contacted with the adsorbent comprises at least 0.05 weight percent (wt%) oxidizable impurities, wherein the purified product comprises less than or equal to 0.01 wt% oxidizable impurities, or a combination thereof. An acetic acid production system comprising: a carbonyiation reactor for contacting methanol with carbon monoxide in the presence of a liquid reaction medium under carbonyiation conditions to form a carbonyiation product comprising acetic acid and one or more oxidizable impurities; and an adsorbent vessel in which at least a portion of the carbonyiation product or a derivative thereof can be contacted with an adsorbent at adsorption conditions to provide a purified product having a reduced concentration of at least one of tire one or more oxidizable impurities relative to a concentration thereof in the at least a portion of the carbonyiation product or the derivative thereof. The system of claim 12, wherein the adsorbent comprises a zeolite, an acidic ion exchange res , a silicate, or a combination thereof. The system of claim 13, w erein the zeolite comprises a nanozeolite, an H-Y zeolite, or a combination thereof, wberein the nanozeolite has an average particle size of less than or equal to 300 nm, or a combination thereof. The system of claim 12, wherein the adsorbent has a silica to alumina (Si/Al) molar ratio of greater than or equal to 20/1. The system of claim 12, wherein the at least a portion of the carbonyiation product or the derivative thereof comprises at least 30 weight percent (wt%) water, wherein the at least a portion of the carbonyiation product or the derivative thereof comprises less than or equal to 70 wt% acetic acid, or both. The system of claim 12, wherein the carbonyiation product comprises greater than or equal to 0.02 weight percent (wt%) of the one or more oxidizable impurities, wberein the purified product comprises less than or equal to 0.01 wt% of the one or more oxidizable impurities, or a combination thereof. The system of claim 12 further comprising: a flash vessel operable to separate the carbonylation product into a liquid fraction and a vapor fraction comprising acetic acid and one or more oxidizable impurities; a light ends distillation column configured to separate the vapor fraction into a lights overhead stream having a boiling point less than that of acetic acid and an acetic acid stream: a separator operable to separate the lights overhead stream into a light aqueous phase comprising acetic acid and water, and a heavy organic phase; or a combination thereof, wherein the adsorbent vessel is fluidly connected with the flash vessel, the light ends distillation column, the separator, or a combination thereof, whereby the at least a portion of the carbonylation product or the derivative thereof contacted with the adsorbent comprises at least a portion of the vapor fraction, at least a portion of the lights overhead stream, at least a portion of the light aqueous phase, at least a portion of the heavy organic phase, or a combination thereof. The sy stem of claim 12 further comprising: a flash vessel operable to separate the carbonylation product into a liquid fraction and a vapor fraction comprising acetic acid and one or more impurities; a light ends distillation column configured to separate the vapor fraction into a lights overhead stream having a boiling point less than that of acetic acid and an acetic acid stream; and a drying column configured to remove water from the acetic add stream, thus providing a dried acetic acid stream and a dr ing column water stream, wherein the adsorbent vessel is fluidly connected with the flash vessel, the light ends distillation column, the dr ing column, or a combination thereof, whereby the at least a portion of the carbonylation product or the derivative thereof contacted with the adsorbent comprises at least a portion of the vapor fraction, at least a portion of the lights o verhead stream, at least a portion of the drying column water stream, or a combination thereof. a flash vessel operable to separate the carbonylation product into a liquid fraction and a vapor fraction; a light ends distillation column configured to separate the vapor fraction into a lights overhead stream having a boiling point of less than that of acetic acid and an acetic acid stream; a separator operable to form, relative to each stream, a light aqueous phase comprising acetic acid and water, and a heavy organic phase from the lights overhead stream; and a distillation column, an aqueous extraction unit, or both, configured to provide an aqueous solution comprising oxidizable impurities from the light aqueous phase comprising acetic acid and water, the heavy organic phase, or both, wherein the at least a portion of the carbonylation product or the derivative thereof introduced into the adsorbent vessel comprises the aqueous solution.
CPC Classification	ACYCLIC OR CARBOCYCLIC COMPOUNDS
Extended Family	094-937-843-104-872 017-469-449-753-199 094-365-392-372-841 009-307-427-022-502 118-502-238-896-775
Patent ID	2019183549
Inventor/Author	Hallinan Noel Ramage David White Daniel
IPC	C07C51/47 C07C53/08
Status	Pending
Simple Family	094-937-843-104-872 017-469-449-753-199 094-365-392-372-841 009-307-427-022-502 118-502-238-896-775
CPC (with Group)	C07C51/12 C07C51/44 C07C51/47 C07C53/08
Issuing Authority	United States Patent and Trademark Office (USPTO)
Kind	Patent Application Publication