# US 5,348,683 A · Chloric acid - alkali metal chlorate mixtures and chlorine dioxide generation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,348,683 A - Document ID: US5348683A - Status: Granted - Kind: A - Application number: 08/042,436 - Filed: 1993-04-05 - Granted: 1994-09-20 - Earliest claimed: 1990-02-06 - Assignees: Olin Corporation - Inventors: Jerry J. Kaczur; David W. Cawlfield; Kenneth E. Woodard, Jr.; Budd L. Duncan - Web page: https://patentgrep.com/patent/US5348683A ## CPC - C25B 1/26: Chlorine; Compounds thereof (by simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine C25B1/34) - B01J 19/2475: {Membrane reactors} - C01B 11/023: {Preparation from chlorites or chlorates} - C01B 11/12: Chloric acid - B01J 2219/00058: Temperature measurement - B01J 2219/00103: in a heat exchanger separate from the reactor - B01J 2219/00164: controlling the flow - C25B: ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR (anodic or cathodic protection C23F13/00; single-crystal growth C30B) - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C} ## Abstract An aqueous solution of chloric acid and alkali metal chlorate is produced in an electrolytic cell having an anode compartment, a cathode compartment, and at least one ion exchange compartment between the anode compartment and the cathode compartment. The process comprises feeding an aqueous solution of an alkali metal chlorate to the ion exchange compartment, electrolyzing an anolyte in the anode compartment to generate hydrogen ions, passing the hydrogen ions from the anode compartment through a cation exchange membrane into the ion exchange compartment to displace alkali metal ions and produce an aqueous solution of chloric acid and alkali metal chlorate, passing alkali metal ions from the ion exchange compartment into the cathode compartment, removing the aqueous solution of chloric acid and alkali metal chlorate from the ion exchange compartment, and, increasing the chlorate ion concentration to provide the aqueous solution of chloric acid and alkali metal chlorate with a total chlorate ion to water molar ratio of about 0.15 or greater. ## Claims ### Claim 1 An aqueous solution of chloric acid and an alkali metal chlorate in which the concentration of chloric acid is about 30% or greater by weight of HClO.sub.3 and the molar ratio of chloric acid to alkali metal chlorate is no more than 250:1. ### Claim 2 (depends on 1) The aqueous solution of claim 1 wherein the molar ratio of chloric acid to alkali metal chlorate is no more than about 200:1. ### Claim 3 (depends on 2) The aqueous solution of claim 2 wherein the molar ratio of chloric acid to alkali metal chlorate is from about 1:1 to about 100:1. ### Claim 4 (depends on 1) The aqueous solution of claim 1 wherein the concentration of chloric acid is from about 30% to about 50% by weight of the solution. ### Claim 5 (depends on 1) The aqueous solution of claim 1 wherein said alkali metal chlorate is sodium chlorate. ### Claim 6 (depends on 5) The aqueous solution of claim 5 wherein the weight percent ratio of HClO.sub.3 to NaClO.sub.3 is greater than about 2.7. ### Claim 7 An aqueous solution of chloric acid and an alkali metal chlorate being substantially free of anionic and cationic impurities in which the concentration of chloric acid is about 30% or greater by weight of HClO.sub.3 and the molar ratio of chloric acid to alkali metal chlorate is no more than 250:1. ### Claim 8 (depends on 7) The aqueous solution of claim 7 wherein the molar ratio of chloric acid to alkali metal chlorate is no more than about 200:1. ### Claim 9 (depends on 8) The aqueous solution of claim 8 wherein the molar ratio of chloric acid to alkali metal chlorate is from about 1:1 to about 100:1. ### Claim 10 (depends on 7) The aqueous solution of claim 7 wherein the concentration of chloric acid is from about 30% to about 50% by weight of the solution. ### Claim 11 (depends on 10) The aqueous solution of claim 10 wherein said alkali metal chlorate is sodium chlorate. ### Claim 12 (depends on 11) The aqueous solution of claim 11 wherein the weight percent ratio of HClO.sub.3 to NaClO.sub.3 is greater than about 2.7. ### Claim 13 An aqueous solution of chloric acid and sodium chlorate being substantially free of anionic and cationic impurities in which the concentration of chloric acid is from about 30% to about 50% and the molar ratio of chloric acid to sodium chlorate is from about 1:1 to about 100:1. ### Claim 14 (depends on 13) The aqueous solution of claim 13 wherein the weight percent ratio of HClO.sub.3 to NaClO.sub.3 is greater than about 2.7.