Lyondell Chemical Technology, L.p.

Arco Chemical Technology, L.p.

Atlantic Richfield Company

Equistar Chemicals, LP

Other

David W Leyshon

John A Sofranko

C Andrew Jones

Xiangmin Li

Te Chang

Elizabeth I Ross-Medgaarden

Sandor M Nagy

Lawrence M Candela

Roger A Grey

Robert N Cochran

Vu Anh Dang

Yuan-Zhang Han

Rick B Watson

Shaw-Chan Lin

Walter S Dubner

Richard J Wolff

Glenn E Cozzone

Morris Gelb

Anne Mae Gaffney

Daniel F White

Andrew P Kahn

Lau S Yang

John C Jubin, Jr

Lei Zhang

Guy L Crocco

Edward Carey

Lawrence J Karas

Barbara Kimmich

Krishnan Viswanathan

Thomas I Evans

Rajendra S Albal

Mark A Liepa

Thomas S Zak

Nicholas Bruschi

Ellen S Lenz

Karl P Rufener

Kimberly A Petry

Robert A Bader

Christopher P Renaudo

Carl L Williams

Natalie C M B Nichols

Robert Bruce Maskell

Sunti Kongkitisupchai

Robert J Jones

Natalie Cmb Nichols

Mark A Leipa

Natalie CMB Nichols

Methods of preparing titanated silica catalysts, and titanated silica catalysts. The titanated silica catalysts may include a silica support, which may include spherical beads. Methods of olefin epoxidation, which may include contacting an olefin with a titanated silica catalyst in the presence of an oxidant.

Titanated catalysts, methods of preparing titanated catalysts, and methods of epoxidation

A skeletal isomerization process for isomerizing olefins is described. The process includes the steps of feeding an olefin-containing feed to a reactor at a space velocity of 1-100 hrfor a first period of time at a first temperature, followed by discontinuing, or stopping, the olefin-containing feed for a second period of time while maintaining the reactor at a second temperature, before resuming the flow of the olefin-containing feed for a third period of time. The methods of this disclosure increase the yield of the skeletal isomers product while reducing the production of C5+ heavy olefins. Additionally, the methods of this disclosure can be applied to feeds containing iso-olefins (for the production of linear olefins) or linear olefins (for the production of iso-olefins).

Method of improving olefin isomerization

Improved systems and methods for producing propylene from olefins including isobutylene is disclosed. The improvements combine streams containing co-produced 1-butene, 2-butene, butadiene, and heavy olefins (C5+) exiting both a metathesis reactor and a skeletal isomerization reactor in a gasoline fractionation tower to remove the heavy olefins. The C4-containing distillate from the gasoline fractionation tower is then fed to a hydroisomerization unit to form mono-olefins and 2-butene. The resulting 2-butene rich stream can then be utilized in metathesis reactions to increase the production of propylene while increasing the lifetime of the metathesis catalyst.

Isobutylene to propylene process flow improvement

A propylene oxide separation system comprising a heavies distillation column configured to receive a crude propylene oxide stream and discharge a heavies purge bottoms comprising at least one impurity selected from acetone, methanol, aldehydes, aldehyde derivatives, water, heavy hydrocarbons comprising C+, or combinations thereof, and discharge a heavies distillation column overhead stream comprising a majority of the propylene oxide entering with the crude propylene oxide stream, and a first extractive distillation column configured to receive the heavies distillation column overhead stream and a first extraction solvent stream comprising a hydrocarbon solvent, and discharge a lights purge overhead comprising at least one impurity selected from aldehydes (e.g., acetaldehyde, formaldehyde, etc.) methyl formate, methanol, water, Chydrocarbons, Chydrocarbons, or combinations thereof, and discharge a rich solvent bottoms stream comprising a majority of the propylene oxide entering via the heavies distillation column overhead stream. A propylene oxide purification method is also provided.

Alkylene oxide separation system

Methods of producing at least one of ethylene and propylene. The methods may include contacting a mixture of C4+ compounds with a catalyst to convert at least a portion of the C4+ compounds to at least one of ethylene and propylene. The catalyst can include a phosphorus treated zeolite, and the mixture of C4+ compounds can include at least one of t-butyl alcohol and methyl t-butyl ether.

Methods of producing propylene and ethylene

A propylene oxide separation system that comprises a distillation column, a decanter, and water wash system. The distillation column is configured to receive a crude propylene oxide stream, discharge an impurity stream that comprises methanol and water, and discharge a bottoms stream that comprises a majority of the propylene oxide entering in the crude propylene oxide stream. The decanter is configured to receive at least a portion of the impurity stream and a hydrocarbon solvent to provide for formation in the decanter of an organic phase and an aqueous phase. The organic phase comprises propylene oxide and hydrocarbon solvent, and is sent to the distillation column. The aqueous phase comprises a majority weight percent of the methanol and the water entering in the impurity stream. The water wash system is configured to receive and purge the aqueous phase from the propylene oxide separation system.

Alkylene oxide separation systems, methods, and apparatuses

The present disclosure relates to a method of epoxidizing an olefin to form an epoxide, the method comprising contacting an alkeneor aralkenewith a titanium silica catalyst, a peroxide, a buffer, and one or more organic solvents in a reaction mixture, wherein the one or more organic solvents comprise a first organic solvent selected from:R&#x2014;OH&#x2003;&#x2003;(I),R&#x2014;CN&#x2003;&#x2003;(II),R&#x2014;C(O)&#x2014;R&#x2003;&#x2003;(III) orR&#x2014;O&#x2014;R&#x2003;&#x2003;(IV)

Catalyst performance in propylene epoxidation

Provided herein in is a method of removing phosphorus from a liquid hydrocarbon that includes the steps of (a) contacting the liquid hydrocarbon with an aqueous solution that comprises an oxidizing agent to form a reaction mixture that comprises an aqueous component and a hydrocarbon component, wherein the liquid hydrocarbon comprises at least an alkene, and a phosphine; (b) reacting the oxidizing agent with the phosphineto form the corresponding phosphine oxide; and (c) separating the aqueous component from the hydrocarbon component, thereby removing the phosphine oxidefrom the liquid hydrocarbon.

Oxidative methods of phosphorus removal from liquid hydrocarbons

The present disclosure relates to a method of preparing propylene oxide comprising the steps:

Process for forming propylene oxide from oxidation of methyl benzyl alcohol

Processes for producing propylene glycol monoalkyl ether are described herein and include contacting propylene oxide and an alcohol in the presence of an alkali or alkaline earth metal alkoxide catalyst to produce an alkoxylation mixture including propylene glycol monoalkyl ether; distilling the alkoxylation mixture to produce a first overhead stream including propylene oxide and the alcohol and a first bottoms stream including propylene glycol monoalkyl ether; distilling the first bottoms stream to produce a second overhead stream including purified propylene glycol monoalkyl ether and a second bottoms stream including heavier byproducts; further distilling the second bottoms stream to form a resulting bottoms stream including caustic and heavier byproducts; introducing an alkali metal borohydride into at least a portion of the resulting bottoms stream to form an alkali metal borohydride containing stream; and introducing the alkali metal borohydride containing stream into one or more distillations upstream of recovery of the second overhead stream.

Production of propylene glycol monoalkyl ether

The disclosure relates to a process for separating propylene oxide for a crude propylene oxide stream, for example an intermediate stream from a PO/TBA process. The crude propylene oxide stream can be passed through an extractive distillation column. The distillation column is operated at a pressure in a range of greater than 25 up to 50 psig, and/or at a temperature in a range of from 70 to 150 degrees Celsius using C-Cparaffin as extractive solvent with an overhead distillate water wash drum. The crude propylene oxide stream include from 0.001 to 0.1 wt % methanol, based on the total composition of the crude propylene oxide stream. The systems, methods, and apparatuses can produce a propylene oxide stream having less formaldehyde and acetaldehyde than the prior art.

A process for producing propylene from ethylene and a feed stream comprising 1-butene, 2-butene, n-butane, and isobutane is disclosed. A butenes stream (1-butene and 2-butene) is produced from the feed stream by removing the paraffins. The butenes stream is reacted in the presence of an isomerization catalyst to produce an isomerized stream with increased concentration of 2-butene. The isomerized stream is reacted with ethylene in the presence of a metathesis catalyst to produce a reaction mixture comprising propylene; the propylene may be isolated from the reaction mixture by distillation. The removal of paraffins from the feed stream improves the catalyst productivity and the plant throughput.

Propylene production

This invention is a process for producing diisobutylene from isobutylene. The process comprises first contacting a sulfonic acid resin with a reaction feed comprising isobutylene and tertiary butyl alcohol to produce a product stream comprising diisobutylene, isobutylene, tertiary butyl alcohol, and water. The product stream is distilled to produce a first overhead stream comprising water and isobutylene and a first bottoms stream comprising diisobutylene and tertiary butyl alcohol. Water is separated from the first overhead stream, and the resulting isobutylene-enriched stream is recycled back to the reaction step. The first bottoms stream is distilled to produce a second overhead stream comprising tertiary butyl alcohol and a bottoms product stream comprising diisobutylene.

Diisobutylene process

A process for producing propylene and isoprene from a feed stream comprising 1-butene and isobutene is disclosed. The feed stream is reacted in a catalytic distillation reactor containing an olefin isomerization catalyst to produce an overhead stream comprising 2-butene and isobutene and a bottoms stream comprising 2-butene. The overhead stream is reacted in the presence of a metathesis catalyst to produce propylene and isoamylenes. Isoprene is produced by dehydrogenation of isoamylenes.

Propylene and isoprene production

Growing community of inventors

West Chester, PA, United States of America

David W Leyshon