PDF Publication Title:
Text from PDF Page: 001
Sulphur crystals 1 INTRODUCTION Sulphur is an element that can be found in nature in its pure form, typically in areas of volcanic activity, or in minerals as a sulphide or sulphate e.g. H2S in sour natural gas, pyrite (FeS2) and gypsum (CaS04)1. The name sulphur is derived from the Sanskrit name ‘Shulbary’ which translates to ‘enemy of copper’ as sulphur destroys the metallic property of copper. Figure 1: Sulphur mineral from the El Desierto mine, Potosi, Bolivia In the laboratory sulphur is purified by a recrystallization with carbon disulphide (CS2). The crystals thus formed are polluted with the solvents used such as H2S and SO2. As these are chemicals that are preferably not used in a home laboratory other solvents are to be used. In the past I used paraffinic oil (lamp oil) to recrystallize sulphur2. However, I found the use of lamp oil to be less suitable for preparing micro crystals for microscopic investigations. Recently, I read an article where toluene and xylene were used as a solvent3. At home, most people will not have these chemicals available in their pure form but I remembered that ‘thinner’ contains similar chemicals (aromatics) i.e. the thinner used in this experiment contains xylene, ethylbenzene and n-butanol as main components. Note that the composition of thinner can vary as it is vendor dependent. The aim of this experiment is to investigate whether conducting a recrystallization with thinner is a relatively fast method for generating microcrystals suitable for microscopic investigations. 2 MATERIALS Paint thinner Sulphur powder Heating plate Test tube with stopper Scale Polarisation microscope (Euromex ML2000) Microscope camera (Lucky Zoom USB5M) Filter paper Figure 2: Euromex ML2000 microscope 1PDF Image | Sulphur crystals
PDF Search Title:
Sulphur crystalsOriginal File Name Searched:
rh-sulphur.pdfDIY PDF Search: Google It | Yahoo | Bing
Sulfur Deposition on Carbon Nanofibers using Supercritical CO2 Sulfur Deposition on Carbon Nanofibers using Supercritical CO2. Gamma sulfur also known as mother of pearl sulfur and nacreous sulfur... More Info
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |