The Dow Chemical Company

Milton S Wing

Walter L Vaughn

Hans R Friedli

Edwin J Strojny

Nobuyuki Ishibe

Arthur E Read, Jr

Warren F Richey

Billy Duane Head

William P Hancock

Glenn William Mathews

Novel microporous fibers and filaments are prepared from normally solid, thermoplastic, orientable, organic polymers which have reactive or reactable groups pendent from the polymer chain, employing a process which involves reactions of said pendent groups while the polymer is in an oriented condition. One of the preferred polymers is a copolymer of ethylene/acrylic acid.

Porous polymer fiber filters

Novel porous fibers and filaments are prepared from normally solid, thermoplastic, orientable, organic polymers which have reactive or reactable groups pendent from the polymer chain, employing a process which involves reactions of said pendent groups while the polymer is in an oriented condition. One of the preferred polymers is a copolymer of ethylene/acrylic acid.

Process for producing porous fibers from orientable olefin polymers

Particles, fibers, or filaments of alkali salts of ethylene/carboxylic acid copolymers or terpolymers, especially in highly porous form, are employed in removing contaminants from tertiary amines or quaternary amine salts, especially metal contaminants.

Removal of impurities from amines

Metal pigments when combined with methylchloroform are stabilized by the addition of small amounts of aromatic diepoxides. Other known stabilizers against metals or the active of light and heat may be incorporated.

Stable metal pigment compositions employing methylchloroform as solvent

Cracking of crude oil or crude oil residues is accomplished in an adiabatic reactor which follows a partial combustion zone with the injection of superheated or shift steam into the combustion gases. Advantages are that the carbon monoxide produced by partial combustion is converted to carbon dioxide which is easily removed, there is no need to supply a separate source of fuel or hydrogen, and coke formation is substantially eliminated. The cracked oil produced in the process can be used as a quench oil and/or fuel to feed the partial combustion zone. The yields of olefins and aromatics is increased over processes using superheated steam cracking.

Crude oil cracking using partial combustion gases

A catalyst for, and method of, producing a reaction product predominantly of maleic anhydride, that is a product of reaction containing a ratio of maleic to citraconic anhydrides of at least 25 to 1, respectively, and preferably greater than about 100 to 1, respectively, by reacting a feed stream consisting of oxygen or an oxygen-containing gas and an organic C.sub.5 feed predominantly of piperylene and dicyclopentadiene, and preferably predominantly dicyclopentadiene, at bath temperatures of from about 360.degree. to about 450.degree. C. over a catalyst comprising a mixture of 25 to 60 weight percent titanium oxide (TiO.sub.2), 5 to 40 weight percent molybdenum oxide (MoO.sub.3) and 30 to 60 weight percent vanadium oxide (V.sub.2 O.sub.5) on an alpha alumina or alumina-silica carrier having less than about one square meter per gram (&lt;1 m.sup.2 /g) surface area. The feed rate of the reactants is preferably between about 1,500 and about 15,000 gas hourly space velocity; the C.sub.5 hydrocarbon content of the feed gases being between about 0.5 and 1.8 volume percent.

Method of producing maleic anhydride

A catalyst for, and method of, producing a reaction product predominantly of maleic anhydride, that is a product of reaction containing a ratio of maleic to citraconic anhydrides of at least 25 to 1, respectively, and preferably greater than about 100 to 1, respectively, by reacting a feed stream consisting of oxygen or an oxygen-containing gas and an organic C.sub.5 feed predominantly of piperylene and dicyclopentadiene, and preferably predominantly dicyclopentadiene, at bath temperatures of from about 360.degree. to about 450.degree. C. over a catalyst comprising a mixture of 25 to 60 weight percent titanium oxide (TiO.sub.2), 5 to 40 weight percent molybdenum oxide (MoO.sub.3) and 30 to 60 weight percent vanadium oxide (V.sub.2 O.sub.5) on an alpha alumina or alumina-silica carrier having less than about one square meter per gram (&lt;1 m.sup.2 /g) surface area.

Catalyst for producing maleic anhydride

A catalyst for, and method of, producing a reaction product predominantly of maleic anhydride, that is a product of reaction containing a ratio of maleic to citraconic anhydrides of at least 25 to 1, respectively, and preferably greater than about 100 to 1, respectively, by reacting a feed stream consisting of oxygen or an oxygen-containing gas and an organic C.sub.5 feed predominantly of piperylene and dicyclopentadiene, and preferably predominantly dicyclopentadiene, at bath temperatures of from about 360.degree. to about 450.degree. C over a catalyst comprising a mixture of 25 to 60 weight percent titanium oxide (TiO.sub.2), 5 to 40 weight percent molybdenum oxide (MoO.sub.3) and 30 to 60 weight percent vanadium oxide (V.sub.2 O.sub.5) on an alpha alumina or alumina-silica carrier having less than about one square meter per gram (&lt;1 m.sup.2 /g) surface area. The feed rate of the reactants is preferably between about 1,500 and about 15,000 gas hourly space velocity; the C.sub.5 hydrocarbon content of the feed gases being between about 0.5 and 1.8 volume percent.

Catalyst for and method of producing maleic anhydride

Thermoplastic hydrocarbon resins are obtained by copolymerizing an isoolefin such as isobutylene with a diolefin such as piperylene in the present of a Friedel-Crafts catalyst in an inert hydrocarbon solvent. These resins have a softening point in the range from 80.degree. to 110.degree.C. and are compatible with ethylene vinyl acetate and polyethylene resins and are useful as tackifier resins or components in hot melt adhesives.

Modified hydrocarbon resins

A catalytic process for hydrocracking crude oil fractions into a C.sub.2 -C.sub.5 alkane mixture having a normal paraffin to isoparaffin molar ratio greater than about 3:1 and thermally cracking this mixture to recover ethylene and propylene. The hydrocracking catalysts used are made from a Group VIII metal, a Group VI B metal or mixtures thereof, with a halogen supported on a silica-alumina support or a natural or synthetic faujasite. The catalysts must be sulfided prior to or during use.

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Lake Jackson, TX, United States of America

Milton S Wing