Allied Chemical Corporation

Allied Corporation

Charles T Ratcliffe

Geza Pap

Stuart Leon Soled

James T Yardley

Anthony J Signorelli

Irving L Mador

Mahmoud B Abdel-Baset

In the reduction of di- or polynitro aromatic compounds by gaseous H.sub.2 S over a solid catalyst, addition of CO gas promotes formation of amino groups from all nitro groups in the molecule. A preferred embodiment is reduction of 2,4- and/or 2,6-dinitrotoluene in vapor phase at 325.degree. C. over a supported iron or supported cobalt catalyst on a support comprising alumina. The amino products are useful for production of polyurethane resins.

Catalytic reduction of nitro aromatic compounds with hydrogen sulfide

Hydrogenation of mononitroaromatic compounds, particularly nitrobenzene, nitrotoluene and their monochloro and monohydroxy ring substitution products, using hydrogen sulfide as reducing agent and a titanium dioxide catalyst at 200.degree.-400.degree. C. and atmospheric pressure.

Conversion of mononitro aromatic compounds to amino compounds by

A new process for preparing haloalkyl epoxides and oxaziranes is described in which a mixture of an perhalo alkene or alkyl imine and chlorine gas is contacted with a Group IA, IIA metal oxide, carbonate or bicarbonate under mild conditions of temperature and pressure. The process, using perhalo alkenes or perhalo alkyl imines as starting material, represents a new economical, facil preparation of the monomer hexafluoropropylene oxide, such monomer is capable of polymerizaton or copolymerization to thermally stable and inert polymers.

Process for preparing epoxides

Conversion of coal to products soluble in common solvents and conversion of coal tar to products of lower molecular weight, effected in liquid or fused reaction medium using a hydrogenating reactant, are carried out employing hydrogen sulfide and carbon monoxide as the sole or major hydrogenating reactant, without need of elemental hydrogen or a hydrogen donor solvent.

Solubilization of coal with hydrogen sulfide and carbon monoxide

A process for the preparation of alkylene episulfides or episelenides is provided which comprises contacting elemental sulfur or elemental selenium, respectively, with an olefin, preferably ethylene, while irradiating with electromagnetic radiation in the infrared to ultraviolet range. The alkylene episulfides and episelenides are useful in the production of a variety of functional polymers.

Process for preparing alkylene episulfides and episelenides

A catalyst/adsorbent for sulfur dioxide from waste gases, via oxidation thereof to sulfur trioxide, comprising vanadium oxide supported on activated carbon, promoted by nickel sulfate or potassium sulfate, or preferably by both.

Process for removing sulfur dioxide from waste gases

A process for reducing aromatic sulfonyl halides with hydrogen sulfide. Hydrogen sulfide is contacted with sulfonyl halides preferably in the presence of a solvent and of a catalyst. The reaction forms thiols and proceeds in the range of between about 50.degree. and 300.degree. C. There is little formation of disulfide and no cleavage of the thiol group.

Catalytic reduction of aromatic sulfonyl halides with hydrogen sulfide

An improved process is described for producing hydroxylamine, NH.sub.2 OH, a valuable intermediate in the industrial manufacture of nylon-6, in which hydrogen sulfide is reacted with nitric oxide, or mixtures of nitrogen oxides, in aqueous acidic media containing a solid sulfur-resistant catalyst, such as activated carbon, at ambient temperature and pressure and substantially in the absence of elemental oxygen. An important aspect of the invention is that the industrial waste gases, hydrogen sulfide and nitrogen oxide, can be effectively utilized in the process.

Synthesis of hydroxylamine from hydrogen sulfide and nitric oxide

A process is described for producing sulfur by the reaction of sulfur dioxide with agglomerating coal. The purity of the product gases is improved and the tendency of the coal to agglomerate is reduced by employing coal particles having a particle size below 500 microns.

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Morristown, NJ, United States of America

Charles T Ratcliffe