GIDROLIZ SUYUQLIGIDAN LIGNINNI AJRATIB OLISH VA UNI SULFOLASH JARAYONINI TADQIQ QILISH
DOI:
https://doi.org/10.66960/jof.3093-8899.00040Kalit so‘zlar:
gidroliz suyuqligi, lignin, kislotali cho‘ktirish, sulfat kislota, pH, IQ-spektr, sulfolash, ligninsulfokislotaAbstrakt
Maqolada gidroliz suyuqligi tarkibidan ligninni kislotali cho‘ktirish usulida ajratib olish va olingan ligninni sulfolash jarayoni o‘rganilgan. Gidroliz suyuqligi dastlab 50–200 mkm polipropilen filtrdan o‘tkazilib, 80–90 °C haroratda 2–4 soat qizdirilgan. Ligninni cho‘ktirish uchun suyuqlikning pH qiymati kontsentrlangan H₂SO₄ qo‘shish orqali 1,8–2,2 gacha pasaytirilgan. Kislotali cho‘ktirish natijasida 60–80 daqiqada ligninning taxminan 97 % qismi cho‘kmaga o‘tishi aniqlangan. Olingan ligninning IQ-spektrida 2929 va 2853 sm⁻¹ da alifatik C–H, 1593,20 sm⁻¹ da aromatik C=C, 1076,28 va 1037,70 sm⁻¹ da C–O hamda 896,90–692,44 sm⁻¹ diapazonda aromatik halqa C–H tebranishlari qayd etilgan. Keyingi bosqichda ligninni sulfolash va ligninsulfokislota hosil bo‘lishiga oid jarayonlar hamda IQ-spektr ko‘rsatkichlari tahlil qilingan.
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