Technical data

Removal of paraffins by urea

Article no: P7171500

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> Unknown Principle

Urea forms addition compounds with (unbranched) paraffins in which the urea molecules are arranged spirally. Paraffin chains are held in the hollow spaces. In this way, short-chain, unbranched alkanes can be removed from fractions obtained by vacuum distillation or branched alkanes be separated from unbranched ones.

lt is recommended that this experiment is carried out together with the previous one (P7171400) in group work-sharing. The experiment can be prepared by one group and be evaluated in the next lesson by all the groups.

Learning objectives

Unpurified lubricating oil contains long-chain paraffins which greatly reduce the lubricating effect in the cold.
These paraffins can be removed by solid extraction.

Benefits

Easy teaching and efficient learning by using interactive experimentation PHYWE-Software
Experiment is part of a complete solution set with experiments for the topic Organic Chemistry matched with international curriculum: all topics are covered

Scope of delivery

Support base, separable for 2 rods	02001-00	1
Stand rods, stainless steel, various sizes	02059-00	1
Boss head	02043-00	1
Spoon, special steel	33398-00	1
Wash bottle, 250 ml, plastic	33930-00	1
Funnel, diameter = 50 mm, plastic (PP)	36890-00	1
Erlenmeyer flask, stopper bed, 100 mlSB 19	MAU-EK17082002	1
Graduated cylinder, 50 ml, plastic	36628-01	1
Test tube, laboratory glass, various lengths, 100 pcs.	37658-10	1
Test tube brush w. wool tip,d20mm	38762-00	1
Test tube rack, wood, for 6 tubes d= 22mm	MAU-20042200	1
Universal clamp	37715-01	1
Rubber stoppers, without bore, various diameters	39255-00	3
Protecting glasses, clear glass	39316-00	1
Urea, 250 g	30086-25	1
Methanol, tech.gr. 1000 ml	30142-70	1
Round filters, 100 pcs., various sizes	32977-03	1