𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Multistage reduction of coals in the potassium/liquid ammonia system

✍ Scribed by Helena Wachowska; Mieczysław Kozłowski

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
822 KB
Volume
74
Category
Article
ISSN
0016-2361

No coin nor oath required. For personal study only.

✦ Synopsis

Two Polish coals and an anthracite were subjected to four-stage reduction in potassium/liquid ammonia. After each stage, solubility of the products in methylene chloride was studied. Extraction yield was found to increase with increasing number of stages. The highest yield of transformation to soluble products was obtained for the orthocoking coal. The 'H n.m.r. investigations proved that aromaticity of the extracts from flame coal is lower than that of the orthocoking coal extracts. The main substituents of the aromatic system of the average structural unit of the extracts from orthocoking coal are alkyl or naphthene groups. In the case of flame coal their contribution is lower and can be related to a higher contribution of oxygen groups.

📜 SIMILAR VOLUMES

Studies of reduction and reductive alkyl
Studies of reduction and reductive alkylation of coals in the potassium/liquid ammonia system. 2. Characterization of coal extracts
✍ Helena Wachowska; Mieczysław Kozłowski 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 578 KB

The products of reduction and reductive alkylation of five demineralized coals run in a system of potassium/ liquid ammonia were subject to extraction by methylene chloride and n-pentane. The paper reports infrared and nuclear magnetic resonance (n.m.r.) characteristics of the extracts and the resul

Application of non-reductive alkylation
Application of non-reductive alkylation in liquid ammonia to studies on macromolecular structure of coals and bitumen-derived asphaltene
✍ Helena Wachowska; Teresa Ignasiak; Otto P. Strausz; Denis Carson; Boleslaw Ignas 📂 Article 📅 1986 🏛 Elsevier Science 🌐 English ⚖ 453 KB

The reaction of non-reductive ethylation of a coal anion generated in the presence of a strong base (sodium and/or potassium amides) in liquid ammonia is an efficient method for coal solubilization. Under the reaction conditions used, over 50 wt y0 of vitrinites separated from carboniferous bitumino

Synthesis of (RSn)4X6 Adamantanes (X = O
Synthesis of (RSn)4X6 Adamantanes (X = O, S, Se) in Liquid Ammonia and in the Two-Phase System Liquid Ammonia/THF
✍ Karsten Wraage; Thomas Pape; Regine Herbst-Irmer; Mathias Noltemeyer; Hans-G. Sc 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 266 KB

The reactions of trisSnBr 3 (1) [tris = (Me 3 Si) 3 C] and nBuSnCl 3 pressure at room temperature results in the formation of (trisSn) 4 S 6 (3) and (trisSn) 4 Se 6 (4). nBuSnCl 3 reacts with Na 2 S with Na 2 X (X = O, S, Se) yield the heterocyclic adamantanes 2-6. The reaction of 1 with Na 2 O is c