The invention discloses a clean production process for converting
camphor ammonium sulfonate into
camphorsulfonic acid. The clean production process comprises the following steps of step 1, filtering a feed solution by a
ceramic membrane to obtain a
ceramic membrane dialysate; step 2, enabling the
ceramic membrane dialysate to enter into a continuous
ion exchange
system for performing continuous
ion exchange to obtain a
camphorsulfonic acid solution, and filling a separation unit of the continuous
ion exchange
system with strong acid cation exchange resin; step 3, performing
reverse osmosis concentration on the
camphorsulfonic acid solution to obtain a camphorsulfonic acid concentrated solution; step 4, performing mechanical
steaming and compressive concentration on the camphorsulfonic acid concentrated solution, and then performing
crystallization,
centrifugal separation and
crystal drying to obtain a camphorsulfonic acid
crystal. The camphorsulfonic acid
crystal produced by the clean production process for converting the
camphor ammonium sulfonate into the camphorsulfonic acid, disclosed by the invention, can reach 99.5 percent or over 99.5 percent in purity, reaches the pharmaceutical grade level of the camphorsulfonic acid, and has the advantages of high yield, simple working procedure, good conversion effect, high purity of product, compact equipment, small occupied area and the like.