Utilization technology of alkaline filtrate in kaliophilite preparation system

Clc Number:

TQ170.9; P579

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments

    In order to produce alkaline filtrate from potassium feldspar hydrothermal preparation of potassium nepheline, the effects of dissolution time, crystallization time, crystallization temperature and water-alkali ratio on the yield and whiteness of potassium nepheline were investigated by hydrothermal method. The results show that the optimum conditions for the synthesis of potassium nepheline are as follows: the dissolution time of alumina hydroxide is 1.5 hours, the crystallization time is 4 hours, the crystallization temperature is 280℃, and the water-alkali ratio is 1.8. XRD spectrum shows the product is kaliophilite owder. FTIR spectrum shows that Al in Al(OH)3 enters the Si—O framework to form Si—O—Al functional groups under hydrothermal conditions, thus confirming the synthesis of kaliophilite. The result of DTG indicates that the kaliophilite synthesized has good thermal stability. Isotherm indicates that the surface area of synthetic kaliophilite is 5.18 m2/g and the average pore size is 32.98 nm. The alkaline filtrate produced by hydrothermal preparation of potassium nepheline by potassium feldspar was realized as resource utilization, and a kind of mother liquor circulation idea was provided for hydrothermal preparation of potassium nepheline by potassium feldspar. The industrialization of hydrothermal preparation of potassium nepheline has become a possibility.

    Cited by
Get Citation

路华龙,霍光祥,段永华,勾明雷,刘军娜,刘晨,2024,钾霞石制备体系碱性滤液的利用技术[J].岩石矿物学杂志,43(1):125~130. LU Hua-long, HUO Guang-xiang, DUAN Yong-hua, GOU Ming-lei, LIU Jun-na, LIU Chen,2024,Utilization technology of alkaline filtrate in kaliophilite preparation system[J]. Acta Petrologica et Mineralogica,43(1):125~130.

Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
  • Received:June 19,2023
  • Revised:October 24,2023
  • Adopted:
  • Online: January 18,2024
  • Published: January 25,2024