PRODUCTION OF PELLETS CONTAINING ONE OR SEVERAL COMPLEXING AGENT SALTS Russian patent published in 2016 - IPC C07C227/42 B01J2/06 B01J8/18 C11D3/33 C11D11/00 

FIELD: process engineering.

SUBSTANCE: invention relates to production of pellets. The latter contain one or several complexing agent salts of general formula (I) from initial water solution. The latter includes one or several complexing agent salts in concentration of 10-80 wt % per total weight of said initial water solution. Claimed process is implemented in the vortex appliance. Central or one or several gaseous jets directed from bottom to top in the area of the appliance of central axis develop the inner loop-like motion to create a vortex zone. Flowing zone adjoins the end of aforesaid the aforesaid zone to change over to reverse motion zone in the area of vortex appliance walls. The latter changes over in its lower zone into vortex zone whereto the initial water solution id injected into one or several gaseous flowing jets. Here, it is dried to get the pellets to be discharged from said appliance. R′ in formula (I) stands for hydrogen atom or one groups or . Note also that R′′ stands for hydrogen atom, alkyl residue with 1-12 atoms of carbon or residue -(CH₂)_q-COOM, where q = 1-5, n and m are integer equal to 0-5. UR'′′ stands for hydrogen atom or alkyl residue with 1-12 carbon atoms, or olefin residue with 2-12 carbon atoms that can contain up to 5 hydroxyl groups as substituent, or one of groups -(CH₂)₀-CO₂M or wherein o and p are integers equal to 0-5, M stand for hydrogen atom, alkaline metal, alkali-earth metal, ammonium ion and substituted ammonium ion in appropriate stoichiometric amounts.

EFFECT: higher quality, more dense and uniform particle size.

11 cl, 2 dwg, 1 ex