Process for the production of cation-exchanging resins from phenolic ethers and products

Claim 1

THE PROCESS OF PRODUCING WATER INSOLUBLE CATION-EXCHANGING RESINS THAT ARE RESISTANT TO ALKALIES AND OXYGEN, WHICH COMPRISES CONDENSING IN THE PRESENCE OF AN ACID HAVING AN -SO3H GROUP AT ELEVATED TEMPERATURE (1) AN AROMATIC COMPOUND OF THE CLASS CONSISTING OF AROMATIC SULFONIC-ACID-GROUP-CONTAINING COMPOUNDS AND AROMATIC CARBOXYLIC-ACID-GROUP-CONTAINING COMPOUNDS, SAID SULFONIC- AND CARBOXYLIC-ACIDGROUPS BEING THE SOLE CATION-EXCHANGING GROUPS IN THE COMPOUNDS, AND SAID COMPOUNDS BEING CAPABLE OF REACTING WITH FORMALDEHYDE TO YIELD HIGH MOLECULAR WATER INSOLUBLE PRODUCTS AND CONTAINING AT LEAST ONE ETHERIFIED PHENOLIC HYDROXY RADICAL, BUT SUBSTANTIALLY NO FREE PHENOLIX HYDROXY RADICALS, AND (2) WITH A MOLAR EXCESS OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND FORMALDEHYDE YIELDING SUBSTANCES, CONTINUING SUCH CONDENSATION AT LEAST UNTIL A GEL IS FORMED, AND DRYING THE GEL AT AN ELEVATED TEMPERATURE.