The Dow Chemical Company

Dow Global Technolgoies LLC

Lee E Walko

Daniel A Hickman

Mark E Jones

John P Henley

Michael M Olken

Daniel J Reed

Kenric A Marshall

William D Clarke

Stephen B Wallace

Rodney G Grusecki

Roy M Cook

Norman Swanson

A process for producing vinyl chloride monomer from ethylene and ethane having input of significant quantities of both ethane and ethylene in input streams to the affiliated reactor where hydrogen chloride in the reactor effluent is only partially recovered from the reactor effluent in the first unit operation after the ethane/ethylene-to-vinyl reaction step or stage. Steps are presented of oxydehydro-chlorination catalytic reaction of ethane, ethylene, hydrogen chloride, oxygen, and chlorine; cooling and condensing the reactor effluent stream; and separating the condensed raw product stream into vinyl chloride monomer and a reactor recycle stream.

Process for vinyl chloride manufacture from ethane and ethylene with partial CHl recovery from reactor effluent

A process for producing vinyl chloride monomer where significant quantities of both ethane and ethylene in input streams to the affiliated reactor where hydrogen chloride in the reactor effluent is essentially fully recovered from the reactor effluent in the first unit operation after the ethane/ethylene-to-vinyl reaction step or stage. Steps are presented of oxydehydro-chlorination catalytic reaction of ethane, ethylene, hydrogen chloride, oxygen, and chlorine; quenching the reactor effluent stream to provide a raw product stream having essentially no hydrogen chloride; and separation of the raw product stream into a vinyl chloride monomer product stream and into a lights stream; and recycling the lights steam to the reactor.

Process for vinyl chloride manufacture from ethane and ethylene with immediate HCl recovery from reactor effluent

In a lined pipe, permeated gases trapped between the liner and the outer casing are vented by a collar received between the liner flange and the pipe flange which defines at least one predetermined channel through which the gases may exit.

Vent collar for plastic lined pipe

Thermoplastic polymer solutions in organic solvents are converted to granules of relatively uniform sizes and a narrow distribution range by passing the polymer solution through a jet nozzle to form a high velocity stream, injecting super heated steam into the high velocity stream to form a suspension of fine polymer particulates in a gas stream, passing the particulates into a heated agglomeration tube having a series of adjoining circular turns of at least 180.degree. wherein the particulates are substantially completely agglomerated into granules and the granules are recovered from the gas stream.

Process for converting polymer solutions into granules

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Midland, MI, United States of America

Lee E Walko