REKRISTALISASI GARAM RAKYAT DARI DAERAH DEMAK UNTUK MENCAPAI SNI GARAM INDUSTRI
ABSTRACT: Salt as we known can
be defined as chemicals compound which the main part is Sodium Chloride (NaCl)
with impurity substances consist of CaSO4, MgSO4, MgCl2, and others. But to get
good quality salt from the raw salt can’t be obtained only by washing raw salt.
This is caused by the fact that impurities not just only on the surface of
crystals salt but also in the crystal lattice salt, so that needs to be
purified by recrystallization. This research will use local raw salt 2nd
quality from Demak. In this research will be limited in efforts to increase the
quality of salt to fullest the Indonesian National Standard (SNI 06-0303-1989)
by recrystallization method. Weight of raw salt used as fixed variable.
Non-preparation and preparation (addition of Na2CO3, NaOH, and PAC) and
crystallization time (1, 1.5, 2 and 2.5 hours) used as change variables.
Impurity content and NaCl concentration was calculated before and after
crystallization treatment. Concentration of Ca, Mg and Na ions was determined
using AAS. Best recrystallization results of NaCl salt concentration is
obtained at crystallization with preparation in 1.5 hours, concentration
393,044.234 ppm (99.969%), which complied to SNI 06-0303-1989 (98.5% db).
Penulis: Agustina Leokristi
Rositawati, Citra Metasari Taslim, Danny Soetrisnanto
Kode Jurnal: jpkimiadd130344
