Dow Technology Investments LLC

George R Phillips

Glenn A Miller

Michael A Brammer

Thomas Carl Eisenschmid

Marinus A Bigi

Michael C Becker

Irvin B Cox

Rick B Watson

Martin Smidt

Noal Phillips

Donald L Campbell

Morteza Mokhtarzadeh

Amarnath Singh

Cloid Russell Smith, Iii

Jason F Giles

Edward Adrian Lord

Kenneth L Kearns, Jr

Britt A Vanchura, Ii

Shankhadeep Das

Robert Hetterley

Seshadri Kumar

Michael John Bainbridge

Nilesh Parmar

Stephane Wambergue

Martin Lucas Smidt

Donald L Campbell Jr

The present invention generally relates to processes for the recovery of rhodium from a catalyst purge stream from a C6 or higher olefin hydroformylation process. In one embodiment, the process comprises (a) treating a catalyst-containing liquid purge stream from the hydroformylation process, wherein the catalyst comprises a precious metal and an organophosphorous ligand, with an oxidant in the presence of a separate liquid aqueous phase comprising a halide-free acid at a sufficient temperature to effect oxidation of a majority of the contained organophosphorous ligand, wherein the halide-free acid is a C1-C6 organic acid or phosphorous acid; (b) recovering the aqueous phase; (c) contacting the aqueous phase with a separate organic phase by mixing the two phases under a syngas atmosphere, wherein the separate organic phase comprises water-insoluble, hydrolysable organophosphorous ligand and recycled olefin from a hydroformylation process; and (d) separating the organic phase to be recycled back to a hydroformylation process.

Processes for recovery of rhodium from a hydroformylation process

The invention provides an authenticatable ballot and method wherein a printable substrate is provided with at least one of overt authenticating indicia and covert authenticating indicia. The overt and covert authenticating indicia provide a means for voters and ballot counting entities to authenticate ballots by verifying the presence of sanctioned overt and covert authenticating indicia. The overt authenticating indicia is observable by the human eye without the use of any specialized tool or light source. The covert authenticating indicia are not readily apparent to the human eye and require the indicia to be resolved using a specialized tool, such as an ultraviolet or infrared light source.

Voter and voting official authenticatable ballot and method

In one aspect, a hydroformylation reaction process comprises contacting an olefin, hydrogen, and CO in the presence of a homogeneous catalyst in a cylindrical reactor to provide a reaction fluid, wherein the reactor has a fixed height, and wherein a total mixing energy of at least 0.5 kW/m3 is delivered to the fluid in the reactor; removing a portion of the reaction fluid from the reactor; and returning at least a portion of the removed reaction fluid to the reactor, wherein the returning reaction fluid is introduced in at least two return locations positioned at a height that is less than 80% of the fixed height, wherein the at least two return locations are positioned above a location in the reactor where hydrogen and carbon monoxide are introduced to the reactor, and wherein at least 15% of the mixing energy is provided by the returning reaction fluid.

Hydroformylation reaction process

The present invention relate to processes for converting olefins to alcohols, ethers, or combinations thereof that are suitable for use as a gasoline additive. In one embodiment, the process comprises (a) receiving a feed stream, wherein the feed stream comprises one or more olefins having 2 to 5 carbon atoms in an amount of up to 80% by weight based on the weight of the feed stream; (b) hydroformylating the feed stream in the presence of a catalyst to convert at least 80% of the olefins from the feed stream to oxygenates; (c) separating a product stream from step (b) into an oxygenate stream and a stream comprising unreacted olefins, inerts, the catalyst, and the remaining oxygenates; and (d) treating the oxygenate stream to convert a plurality of the oxygenates into at least one of an alcohol, an ether, or combinations thereof is suitable for use as a gasoline additive.

Process for converting olefins to alcohols, ethers, or combinations thereof

A hydroformylation process wherein the hydrolyzable organophosphorous ligand component of the catalyst is supplied as a stabilized ligand composition comprising a hydrolyzable organophosphorous ligand and, per 100 moles compound, from 0.05 to 13 acid-neutralizing equivalents of an acid scavenger.

Stabilized organophosphorous compounds

A process involving admixing a ligand and an alkanolamine. The process allows the use of ligand despite the presence of contaminating amounts of phosphorus acid, and improves the shelf life of premixed ligand solutions.

Method for the preparation of a stabilized organophosphorous compound solution

A ligand crystal structure of 6,6'-[[3,3&#x2032;,5,5&#x2032;-tetrakis(1,1-dimethylethyl)-[1,1&#x2032;-biphenyl]-2,2&#x2032;-diyl]bis(oxy)]bisdibenzo[d,f][1,3,2]-dioxaphosphepin. Formule (I) 

Crystalline ligand

Catalytic metal loss when using a hydroformylation catalyst comprising an organophosphite ligand is ameliorated by adding CO to a strip gas vaporizer.

Hydroformylation process

A multi-reaction train hydroformylation process wherein a common product-catalyst separation zone is employed.

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South Charleston, WV, United States of America

George R Phillips