E.i. Dupont De Nemours and Company

The Chemours Company Fc, LLC

Lisa Edith Helberg

James Timothy Cronin

Thomas Shields Elkins

Angela Ruth Strzelecki

Hans Hellmut Glaeser

Stephen Thomas Breske

Peter Hill

Craig Steven Westphal

Jane Ramsey Marsh

The present invention relates to a process for separating BaClfrom a CaClbrine solution.

Separation of BACL2 from CACL2 brine solution

The present invention provides a process for separating iodine from a NaCl brine, comprising the following steps: (a) providing said NaCl brine containing iodide, (b) adjusting the pH of said NaCl brine to be no greater than 1.5, (c) adding oxidizing agent, such as chlorine containing oxidizing agent, to said NaCl brine resulting from step (b) to obtain an oxidation-reduction potential in said NaCl brine of from 560 mV to 925 mV, the combination of said pH of no greater than 1.5 and oxidation-reduction potential of 560 mV to 925 mV resulting in the formation of an iodine-chlorine anionic complex, and (d) contacting nonionic adsorption resin and said NaCl brine from step (c) one with the other to adsorb said iodine from this brine, to obtain as a result thereof NaCl brine wherein the iodine content therein is preferably no greater than 100 ppbw, more preferably no greater than 10 ppbw.

Purification of NaCl brine containing iodine

The present disclosure relates to reacting tin metal with crude TiClcontaining arsenic to produce pure TiCl, SnCl, and an arsenic solid co-product. In some embodiments, the contaminant vanadium is removed as well. The reaction is preferably done in a continuous fashion in two stages for maximum through-put and utility at an elevated temperature. Distillation can be used to purify the TiClproduced and simultaneously yield a purified SnClproduct. The synthesis of SnClin this method utilizes waste chloride to save virgin chlorine which would otherwise be used.

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The present disclosure relates to reacting tin metal with crude TiClcontaining arsenic to produce pure TiCl, SnCl, and an arsenic solid co-product. In some embodiments, the contaminant vanadium is removed as well. In another embodiment, the vanadium is removed separately through a commercial process and the resulting arsenic containing commercial grade of purified TiClis reacted with elemental tin, sulfur and ferric chloride to substantially reduce the arsenic. The reaction is preferably done in a continuous fashion in two stages for maximum through-put and utility at an elevated temperature. Distillation can be used to purify the TiClproduced and simultaneously yield a purified SnClproduct. The synthesis of SnClin this method utilizes waste chloride to save virgin chlorine which would otherwise be used.

This disclosure relates to a method for detecting at least one analyte in a tetrachloride sample comprising titanium, tin or silicon tetrachloride; comprising,

Method for quantification of analytes in a titanium, tin or silicon tetrachloride sample

A cleaning system and method for in-process sensors wherein a scouring jet discharges process fluid as the cleaning agent to remove solids and other contaminants from the surface of the sensor.

Method for cleaning in-process sensors

System and method for cleaning in-process sensors

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.

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Middletown, DE, United States of America

Lisa Edith Helberg