Processing of boric acid from borax by a wet chemical method

Mergen A., Demirhan M., Bilen M.

ADVANCED POWDER TECHNOLOGY, cilt.14, sa.3, ss.279-293, 2003 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 14 Sayı: 3
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1163/15685520360685947
  • Dergi Adı: ADVANCED POWDER TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.279-293
  • Anahtar Kelimeler: boric acid, borax, crystallization, wet chemical method, rafination
  • Gazi Üniversitesi Adresli: Evet

Özet

Boric acid crystals were obtained from borax (Na2B4O7 . 10H(2)O) solutions which were prepared from borax ore. The concentration of borax solutions was varied from 1120 to 1240 kg/m(3) and 1180 kg/m(3) was determined to be the optimum concentration value for boric acid production from a relation between borax solution concentration and boric acid production yield and boric acid purity. Boric acid production yield was around 91% for a borax solution of 1180 kg/m(3). Boric acid purity ranged from 94 to 97% for different concentrations before refining, and a high purity boric acid over 99.6% with low sulfate and sodium was obtained after refining. Boric acid crystals were characterized by X-ray diffraction, differential thermal and thermograrimetric analysis, and scanning electron microscopy observation.