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Use and Synthesis of Piperazine-N,N'-bis(2-hydroxypropanesulfonic acid) disodium salt

Application: Piperazine-N,N-bis(2-hydroxyethanesulfonic acid) sodium salt has a sulfonic acid group on the piperazine ring, chemical and structural characteristics determine piperazine-N,N-bis(2-hydroxyethanesulfonic acid) acid) sodium salt completely dissociates in water, which is attributed to its osmotic driving principle, which is beneficial to generate high osmotic pressure. Meanwhile, when piperazine-N,N-bis(2-hydroxyethanesulfonic acid) sodium salt is used as a forward osmotic Chemicalbook diassorb solute, minimal reverse solute diffusion can be achieved given its three-dimensional configuration. These advantages demonstrate the applicability and good performance of piperazine-N,N-bis(2-hydroxyethanesulfonic acid) sodium salt as a forward osmosis desalter. Crucially, piperazine-N,N-bis(2-hydroxyethanesulfonic acid) sodium salts attract solutes while producing high forward osmotic water fluxes with negligible reverse solute diffusion, validating their Applicability and Potential.

Preparation: Piperazine-N,N-bis(2-hydroxyethanesulfonic acid) sodium salt (P-2SO3-2Na) was prepared as follows: Piperazine (2.15 g, 25 mmol) was dissolved in 20 mL of DI water. Then ClCH2CH2SO3Na (9.23 g, 50 mmol) and NaOH Chemicalbook (1.60 g, 50 mmol) were added sequentially. The resulting solution was continuously stirred at 40°C overnight. A clear solution was formed. The product was obtained by precipitation from cold ethanol and purified from H2O/EtOH. The white powder piperazine-N,N-bis(2-hydroxyethanesulfonic acid) sodium salt was collected after drying (>99% yield).