Membrane separation system and purification method for purifying camphorsulfonic acid solution

Abstract

The invention relates to a membrane separation system and a purification method for purifying camphorsulfonic acid solution. At present, an evaporation process is generally used for purifying the camphorsulfonic acid solution, which removes redundant water in a boiled state; and thus, the processing cost is relatively high, and the material is easily deteriorated and lost after staying in high-temperature state for a long time. In the invention, large particle impurities in a mother solution are filtered by a first-level separation membrane; a thin solution and a thick solution are separated by a second-level concentration membrane; the thin solution separated by the second-level concentration membrane enters a third-level concentration membrane and is recycled; the thick solution separated by the third-level concentration membrane is returned to the second-level concentration membrane again; the thick solution discharged by the second-level concentration membrane is the finished product; and the thin solution separated by the third-level concentration membrane is directly discharged out of the membrane separation system. The invention provides a physical separation process without phase change and with low energy consumption. Through the invention, the energy consumption is low, the operation cost is reduced, and atmospheric pollution is prevented as the entire membrane separation system operates in a closed pipeline.

Description

technical field [0001] The invention belongs to equipment and methods for concentrating and purifying organic matter in the fine chemical industry, in particular to a membrane separation system and a purification method for purifying camphorsulfonic acid liquid. Background technique [0002] The concentration section of camphorsulfonic acid solution in the production process of D(-)phenylglycine is usually treated by evaporation process to remove excess water in a boiling state. Not only the processing cost is high, but also the material is prone to deterioration and loss under high temperature for a long time. Contents of the invention [0003] Aiming at the defects in the prior art, the invention provides a membrane separation system and a purification method for purifying camphorsulfonic acid liquid, which can effectively reduce production costs and energy consumption, and ensure the quality of finished products. [0004] For this reason, the present invention takes fol...

AI Technical Summary

Problems solved by technology

[0002] The concentration section of camphorsulfonic acid solution in the production process of D(-)phenylglycine is usually treated by evaporation process to remove excess water in boiling state. Not only the processing cost is high, but also the material is easy to deteriorate and lose in the high temperature state for a long time.

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