HYDROCHLORIC ACID

Brand	Owner (click to sort)	Address	Description
KN	PETTY, OLIVE B.	944 E. BASE LINE SAN BERNARDINO CA 92410	HYDROCHLORIC ACID, STANNOUS CHLORIDE, AMMONIUM CHLORIDE, POTASSIUM IODIDE, SODIUM CARBONATE, AMMONIUM HYDROXIDE, AND NITRIC ACID;
NATRICHLOR	Keavy's Corner	12413 U.S. Highway 98 Sebring FL 33876	Hydrochloric acid; Oxidizing agents; Sodium chlorite;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

Spent, acidic solutions comprising cupric chloride and hyrdrochloric acid from the copper etching process are regenerated by a process in which the acid is subjected to distillation with sulfuric acid. In one embodiment, the process comprises (a) providing a spent etchant comprising at least about 10% by weight chloride and at least about 5% dissolved copper; (b) adding at least about 2 moles of sulfuric acid per mole of dissolved copper to the spent etching solution, thereby converting copper chloride into hydrochloric acid and precipitated copper sulfate; (c) distilling the mixture from step (b) to vaporize at least a portion of the hydrochloric acid; (d) condensing at least a portion of the vaporized hydrochloric acid; (e) separating at least a portion of the precipitated copper sulfate from the residual liquid, wherein said residual liquid comprises sulfuric acid; and (f) reusing at least a portion of the residual liquid as a sulfuric acid source in step (b).