Eastman Chemical Company

Eastman-kodak Company

Ginette Struck Tolleson

Thomas Allen Puckette

Ashfaq Shahanawaz Shaikh

Robert Thomas Hembre

Thomas James Devon

Jerome Leonard Stavinoha, Jr

Jerome L Stavinoha

Anthony Ponder

Rebecca How

Matt Clarke

Selective recovery of C2 to C4 hydrocarbons is achieved through the use of a converging-diverging nozzle, or de Laval nozzle. The vapor stream comprising C2 to C4 hydrocarbons is fed into an inlet of a de Laval nozzle having a throat. The vapor stream may have an initial temperature of between 0&#xb0; C. and 100&#xb0; C., and an initial pressure of between 200 psig and 500 psig. In the de Laval nozzle, the vapor stream expands after passing through the throat of the de Laval nozzle, producing a vapor stream having reduced temperature and pressure. Then, C2 to C4 hydrocarbons condense from the reduced-temperature vapor stream as liquid droplets, which may be recovered. Fractionation of C2 to C4 hydrocarbons by means of a de Laval nozzle is possible; the technique allows selective recovery of a stream enriched in propene from a mixture of propane and propene.

Supersonic separation of hydrocarbons

This describes bidentate ferrocene-linked phosphine-phosphoramidate compounds. Hydroformylation catalyst compositions and methods of hydroformylation using the compounds are also disclosed. Methods of making the compounds are also disclosed.

Phosphorous compounds useful as ligands and compositions and methods regarding them

This invention is directed to a class of compounds that can be both monodentate and bidentate in their association with a transition metal to form a catalyst for reactions such as the hydroformylation of olefins to produce aldehydes. The compounds contain two phosphorus atoms having different steric and/or electronic nature. In hydroformylation catalysts, the compounds advantageously can produce a variable n/iso product mixture of aldehyde products that can be varied by simply changing process variables such as [H]/[CO] partial pressure gas ratio or temperature/inert gas partial pressure.

Hydroformylation catalysts

Described is a process for reducing the fluoride content of products prepared in a process utilizing a fluorophosphite-containing transition metal complex catalyst, involving contacting the products with an adsorbent.

Process for reducing fluoride impurities resulting from use of fluorophosphite catalysts

Disclosed are novel catalyst systems comprising (1) a diorgano fluorophosphite ligand; (2) rhodium, wherein the ratio of gram moles fluorophosphite ligand (1) to gram atoms of rhodium is at least 1:1; and (3) a Group VIII metal, other than rhodium, or Group VIII metal-containing compound, in an amount effective to reduce the formation of HF during the use of the catalyst system. The presence of the other Group VIII metal decreases the amount of hydrogen fluoride produced during the use of the catalyst system. The hydrogen fluoride originates from very low level degradation of the ligand. Also disclosed are novel catalyst solutions of the aforesaid catalyst system and the use of the catalyst system in the hydroformylation of olefins to produce aldehydes.

Stabilization of fluorophosphite-containing catalysts

Disclosed is a process for reducing fluoride content in a process utilizing a fluorophosphite-containing transition metal catalyst.

Epoxide stabilization of fluorophosphite-metal catalyst system in a hydroformylation process

Disclosed are catalyst compositions comprising one or more transition metals selected from the Group VIII metals and rhenium and one or more chlorophosphite compounds having the general Formula

Hydroformylation process using novel phosphite-metal catalyst system

This invention relates to a hydroformylation process for preparing an aldehyde, which comprises reacting an olefin with hydrogen and carbon monoxide in the presence of a catalyst solution comprising of rhodium, a hydroformylation solvent and a chlorophosphite compound having the general formula ##STR1##

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Longview, TX, United States of America

Ginette Struck Tolleson