Abstract: In the process for preparing thick films comprising dispersing powder of a starting material for thick films in a solvent system, applying direct electric potential between the electrodes provided in the solvent system and thus electrodepositing the powder material on a substrate connected to the cathode, an improvement wherein a mixed solvent comprising an alcohol or alcohols, a methyl-group-containing ketone or ketones and nitorcellulose is disclosed. By this process thick films of solid electrolytes can be economically formed.

Abstract: In the recovery of chlorine from iron chloride by causing reaction between an oxidizing gas and a gas containing iron chloride as the predominant constituent within an oxidation furnace, the initial meeting of the two reacting gases is caused to take place in an unobstructed space within the furnace, the oxygen being injected into the furnace in directions and at a velocity such that the resulting turbulent flow due to the initial collision of the two gases will not reach the furnace wall, whereby depositing of Fe.sub.2 O.sub.3 on the furnace wall is reduced to a minimum.

Abstract: A method for recovering chlorine from a chlorine-containing gaseous mixture containing carbon dioxide which comprises the steps of cooling said mixture in a rectification column of total-reflux type to prepare liquid chlorine, then subjecting the liquid chlorine to temperature control, whereby liquid chlorine of high purity is recovered in high yield.

Abstract: Process for post-treating a chlorinated ilmenite ore which has undergone a selective chlorination treatment in the presence of a solid carbonaceous material, which comprises subjecting the chlorinated ilmenite ore to a magnetic separation in a high magnetic field to separate it into a magnetic portion and non-magnetic portion, subjecting the residual of the solid carbonaceous material concentrated in the non-magnetic portion to flotation, using a frothing agent such as methylisobutylcarbinol and a collector for a sulfide ore such as xanthate, Aerofloat or the like, and washing a gangue value partially liberated from the ilmenite ore with water or suspending it in water in said flotation to separate these materials respectively thereby to produce an artificial rutile with a TiO.sub.2 content of at least 95% as a final product.

Abstract: Artificial rutile of high TiO.sub.2 grade is produced by chlorine treatment of titaniferous ore such as ilmenite which comprises a combination of (1) a pretreatment step in which the ore is oxidized by roasting at a temperature below the sintering temperature thereof thereby to activate the ore, (2) a chloridization step in which the pretreated ore is subjected to a chlorine treatment in a fluidized bed chloridization furnace thereby to chloridize and remove selectively iron oxides within the ore without the formation of TiCl.sub.4, and (3) an aftertreatment step which comprises subjecting the ore to magnetic separation with a magnetic field of at least 20,000 gauses and further treatments thereafter, as necessary, such as a wet table treatment and electrostatic separation at from 5,000 to 30,000 volts.