TH65768A - Retarder for the preparation of purified brine - Google Patents

Abstract

DC60 (06/09/45) Invention involves a process for producing fine-purity brns by dissolving them. Salt contaminated with calcium sulfate source with at least one mixture of low molecular weight retardants and at least one high molecular weight retardant. The invention involves a process for producing a fine-purity bright by dissolving it. Salt contaminated with calcium sulfate source, with at least one mixture of low molecular weight retardants and at least one high molecular weight retardant.

Claims (10)

1. The process for producing high-purity brine involves dissolving salts contaminated with sulfates, ions, and alkali (earth) metal ions other than sodium in water. At least low and high molecular weight retarders are used to reduce the levels of alkali (earth) metal sulfates dissolved in the brine, particularly the required amounts of calcium and sulfate. These levels are reduced to the extent that approximately 80% of the alkali (earth) metal sulfates are dissolved, compared to the blank dissolution process without the use of retarders. 2. A procedure under claim 1 whereby two compounds exhibit synergistic action in inhibiting the dissolution of sulfate ions and alkaline earth metal ions other than sodium. 3. A procedure under claim 1 or 2 where at least one compound has a molecular weight less than 1000 and another compound has a molecular weight higher than that of the preceding compound. 4. A procedure under claim 3 where higher molecular weight compounds are selected from a group containing compounds that may be selected to have linear or branched alkyl substitutions that are reactive with sulfonates, sulfates, phosphites, phosphates, and/or carboxyl groups. 5. The procedure under claim 4, where higher molecular weight compounds are selected from the group containing lignosulfates, phospholipids, and polyacrylates, preferably phospholipids. 6. Any of the methods under claims 3-5, whereby the lowest molecular weight compound is selected from a group consisting of: - alkylbenzene sulfonate where the alkyl group can be linear or branched; - water-soluble phosphate; - ethoxylated compounds containing one or more sulfite, sulfonate, sulfate, phosphite, phosphonate, phosphate, and/or carboxyl groups; and - C2-C40 alkyl compounds containing one or more sulfite, sulfonate, sulfate, phosphite, phosphonate, phosphate, and/or carboxyl groups. 7. A process pursuant to one of the preceding claims where the constituent components are a mixture of low and high molecular weight phospholipids, preferably derivatives from yeast cells, particularly bread yeast. 8. A process purified under any of the preceding claims whereby Bryne is further purified by commonly used chemical processes. 9. A Bryne that can be acquired by means of any of the claims in Articles 1-8. 10. The use of the Bryne of claim 9 in membrane electrolysis or crystallization by evaporation.