E.i. Dupont De Nemours and Company

Hans Hellmut Glaeser

James B Dunson, Jr

David Nicholson Low

Stephan Claude De La Veaux

Lisa Edith Helberg

James Timothy Cronin

Thomas Shields Elkins

Angela Ruth Strzelecki

Paul G Reis

Gary Ken Whiting

Melvyn B Pell

Suhas Mahuli

Aaron J Becker

Mark J Spoon

The present invention is a process for controlling, at an aim point, the passivation of aluminum chloride in the chlorinator discharge stream in a process for making titanium tetrachloride.

Process for controlling the passivation of aluminum chloride formed in the chlorination of titanium-containing ores

The present invention provides a process for recovering the chlorine value from a particulate feed stream of metal chlorides wherein the total energy and reactant mass flow are managed to minimize the build up of deposits of solids on the reactor walls and maximize the conversion of the metal chlorides to metal oxides and chlorine.

Process for the recovery of chlorine from iron chlorides

In a process for chlorinating titanium containing material in a fluidized bed reactor which evolves gaseous material including CO, COS, and TiCl.sub.4, the improvement comprising introducing oxygen containing gas at a location or locations which are downstream of the surface of the bed, as measured in its static condition, to convert at least some CO to CO.sub.2 and some COS to CO.sub.2 and SO.sub.2.

Process for reducing carbon monoxide and carbonyl sulfide emissions from

In a fluidized bed process for chlorinating rirnium-containing material, an improvement is disclosed comprising utilizing in the process calcined petroleum shot coke, calcined petroleum fluid coke or mixtures thereof. The improved process is capable of (a) decreasing the amount of fine particulate coke that is entrained in the hot gases exiting the fluidized bed reactor, and (b) more completely reacting the coke.

Fluidized bed process for chlorinating titanium-containing material and

A process for preparing rutile TiO.sub.2 by a process comprising oxidizing with oxygen or an oxygen containing gas, a mixture TiCl.sub.4 and AlCl.sub.3 and after at least 80% of the TiCl.sub.4 has been converted to TiO.sub.2 adding sufficient PCl.sub.3 to form from 0.1-0.5% P.sub.2 O.sub.5 in the TiO.sub.2, the amount of AlCl.sub.3 being sufficient to form 0.1-1.5% Al.sub.2 O.sub.3 in the TiO.sub.2.

Process for producing rutile TiO.sub.2

A process for the removal of aluminum chloride from a liquid solution thereof with the liquid metal chlorides resulting from the chlorination of titaniferous materials by mixing water and sodium chloride with the liquid solution in amounts such that the amount of water is less than equimolar with respect to the total amount of aluminum chloride and the combined amount of water and sodium chloride is at least equimolar with respect to the total amount of aluminum chloride. This process significantly decreases the corrosion of apparatus associated with the presence of aluminum chloride and substantially eliminates losses of titanium tetrachloride and ferric chloride present in the liquid solution and reduces the formation of HCl.

Removal of AlCl.sub.3 from crude TiCl.sub.4 by addition of H.sub.2 O and

A reduction/chlorination process is provided for the treatment of titaniferous materials such as ilmenite ores. The chlorination is selective in that the titanium constituent of the titaniferous material is chlorinated, but there is no appreciable net yield of iron chloride from the iron constituent. Where other metals such as vanadium are present they may be chlorinated with the titanium. The reduction utilizes as the reductant an amount of carbonaceous material which, based on oxygen in the titaniferous material, is at least stoichiometric to produce carbon monoxide. The selective chlorination utilizes as the chlorinating agent either ferrous chloride (FeCl.sub.2) alone or certain combinations of ferrous chloride and one or more other chlorine-containing members, notably molecular chlorine (Cl.sub.2) and hydrogen chloride (HCl). The use of ferric chloride (FeCl.sub.3) as a part or all of the chlorinating agent is the equivalent of using a FeCl.sub.2 /0.5 Cl.sub.2 mixture. Preferably, sufficient chlorine atoms are provided by the chlorinating agent to react with essentially all of the titanium in the titaniferous material. An elevated temperature in the range of 950.degree. to 1400.degree. C. is maintained during the chlorination, but depending upon the composition of the chlorinating agent, there may be a minimum temperature in the range which is needed to maintain selectivity.

Process for selectively chlorinating the titanium content of

A reduction/chlorination process is provided for the treatment of titaniferous materials such as ilmenite ores. The chlorination is selective in that the titanium constituent of the titaniferous material is chlorinated, but there is no appreciable net yield of iron chloride from the iron constituent. Where other metals such as vanadium are present they may be chlorinated with the titanium. The reduction utilizes as the reductant an amount of carbonaceous material which, based on oxygen in the titaniferous material, is at least stoichiometric to produce carbon monoxide. The selective chlorination utilizes as the chlorinating agent either ferrous chloride (FeCl.sub.2) alone or certain combinations of ferrous chloride and one or more other chlorine-containing members, notably molecular chlorine (Cl.sub.2) and hydrogen chloride (HCl). The use of ferric chloride (FeCl.sub.3) as a part or all of the chlorinating agent is the equivalent of using a FeCl.sub.2 /0.5 Cl.sub.2 mixture. Preferably, sufficient chlorine atoms are provided by the chlorinating agent to react with essentially all of the titanium in the titaniferous material. An elevated temperature in the range of 950.degree. to 1400.degree.C. is maintained during the chlorination, but depending upon the composition of the chlorinating agent, there may be a minimum temperature in the range which is needed to maintain selectivity.

A reduction/chlorination process is provided for the treatment of titaniferous materials such as ilmenite ores. The chlorination is selective in that the titanium constituent of the titaniferous material is chlorinated, but there is no appreciable net yield of iron chloride from the iron constituent. Where other metals such as vanadium are present they may be chlorinated with the titanium. The reduction utilizes as the reductant an amount of carbonaceous material which, based on oxygen in the titaniferous material, is at least stoichiometric to produce carbon monoxide. The selective chlorination utilizes as the chlorinating agent either ferrous chloride (FeCl.sub.2) alone or certain combinations of ferrous chloride and one or more other chloride-containing members, notably molecular chlorine (Cl.sub.2) and hydrogen chloride (HCl). The use of ferric chloride (FeCl.sub.3) as a part or all of the chlorinating agent is the equivalent of using a FeCl.sub.2 /0.5 Cl.sub.2 mixture. Preferably, sufficient chlorine atoms are provided by the chlorinating agent to react with essentially all of the titanium in the titaniferous material. An elevated temperature in the range of 950.degree. to 1400.degree.C. is maintained during the chlorination, but depending upon the composition of the chlorinating agent, there may be a minimum temperature in the range which is needed to maintain selectivity.

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Wilmington, DE, United States of America

Hans Hellmut Glaeser