Dr Christian Gunawan, Circa process chemist
Below are pictures showing dissolution of PVC in Cyrene (10% concentration). There are three pictures with two vials; both vials left at room temperature, one vial stirred at 50°C for 30 minutes with the other vial at room temperature (for comparison), and one vial stirred at 50°C for overnight with the other vial at room temperature. As you can see, PVC in Cyrene at room temperature tends to make a suspension and by heating to 50°C the mixture becomes clear and very thick gel like solution.
Catalyst: Possible Consequences of the N-Methyl Pyrrolidone REACH Restriction
James Sherwood, Thomas J. Farmer and James H. Clark
Regulation (EC) No. 1907/2006 of the European Parliament and of the Council on the Registration, Evaluation, Author-isation, and Restriction of Chemicals (REACH) is EU legislation designed to protect human health and the environ-ment from hazardous substances.
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Several criteria should be fulfilled in order to call a solvent ‘green’
Driven by government regulations and concerns regarding environmental preservation and depletion of natural resources, the bio-based solvents industry has faced an exponential rise in demand and a push towards the development of innovative green solutions. These solvents, among which bio-acetone and bio-ethanol, are an effective and low-cost alternative to conventional solvents.