US1899572A

US1899572A - Method of dissolving titanium tetrachloride in aqueous solvents

Info

Publication number: US1899572A
Application number: US592656A
Authority: US
Inventors: Kubelka Paul
Original assignee: Krebs Pigment & Color Corp
Current assignee: Krebs Pigment & Color Corp
Priority date: 1931-02-27
Filing date: 1932-02-12
Publication date: 1933-02-28
Anticipated expiration: 1950-02-28

Description

Patented Feb. 28, 1933 UNITED STATES PATENT OFFICE PAUL KUBELKA, OF PRAGUE, CZECHOSLOVAKIA, ASSIGNOR TO KREBS PIG-KENT &; COLOR CORPORATION, OF NEWARK, NEW JERSEY, A CORPORATION OF DELAWARE METHOD OF DISSOLVING TITANIUM TETRACHLORIDE IN AQUEOUS SOLVENTS No Drawing. Application filed February 12, 1932, Serial No. 592,656, and in Germany February 27, 1931.

The present invention relates to the production of solutions containing titanium chloride and comprises introducing anhydrous titanium tetrachloride into the body and below the surface of an aqueous solvent.

In the preparation of hydrochloric acid solutions containing titanium by .mixing titanium tetrachloride with water or with an aqueous solution, local overheating usually occurs due to the high heat of solution which results in an evaporation of titanium tetrachloride and consequent loss of this material.

The volatilization losses can be reduced by a vigorous agitation of the solvent but cannot be entirely avoided in this manner.

I have found that the losses of evaporation can practically completely be avoided if the titanium tetrachloride is introduced below the surface of the suitably agitated solvent. This may be accomplished by using one or more submerged feed pipes for the titanium chloride. It was unexpectedly found that no clogging up of these feed pipes by titanium oxygen compounds or titanium oxychlorides takes place or that the relatively small pressure of a titanium chloride column of a few decimeters is sufiicient to remove such precipitates from the pipes. I obtain in this manner of introducing the titanium tetrachloride into the solvent, particularly when the solvent is simultaneously vigorously agitated, a much more uniform distribution of the heat as has been achieved up to the present time by the usual introduction of the titanium chloride on the surface of the solvent. The hydrochloric acid gas and steam which are evolved in this operation are practically free from titanium tetrachloride.

I further found it advisable, in this manner of introducing titanium tetrachloride into a solvent, to pass through these submerged feed pipes a current of dry air or other inert gas together with the titanium tetrachloride whereby not only the backing up of the tita= nium chloride in the pipes is prevented, but

this current of air further minimizes the I danger of clogging up the pipes by precipi tates.

As solvents for the tetrachloride, I can use, besides water, particularly hydrochloric acid and dilute solutions of titanium tetrachloride.

I can also make the dissolution of the titanium tetrachloride in a continuous manner by simultaneously introducing into a body of an aqueous solvent the titanium chloride and the solvent each of the two through one or more separate submerged feed pipes. The

dissolution vessel is also provided with an overflow so that the freshly formed'titanium chloride solution is constantly removed. ;In

this case also I can add a little air to the stream of titanium tetrachloride introduced. The rate of addition of the titanium tetrachloride and that of the water, hydrochloric acid, titanium chloride solution or other solvent,is regulated according to the desired concentration of the titanium chloride solution.

Evaporation losses of tetrachloride are in this case also, particularly when the solvent is vigorously agitated practically avoided.

I claim: 7

1. In a process for the preparation of a titanium chloride solution, the step which comprises introducing titanium tetrachloride into an agitated aqueous solvent below the surface of said solvent. I

2. In a process of preparing titanium chloride solutions, the step which comprises ride solution below the surface of said solu:

tion continuously withdrawing from the said body titanium chloride solution and regulating the rate of introduction of said titanium tetrachloride and said solvent so as to give the desired concentration of titanium chloride in the solution.

In testimonywhereof, I' afiix my signature.

PAUL KUBELKA.