Product details

Preparation of p-toluenesulfonic acid

Preparation of p-toluenesulfonic acid

Item no.: P3101500

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Principle

This experiment examins the formation of p-tolune-sulfonic acid. The sulfonation of toluene with concentrated sulfuric acid is an electrophilic aromatic substitution. This means, the sulphonation of toluene is an electrophilic substitution at the aromatic compound. The sulphonating reagents can be the free sulphur trioxide or the HSO3+ cation, which is present in the concentrated sulphuric acid in equilibrium. Unlike most other electrophilic substitutions, sulphonation is a reversible reaction. If water is present at higher temperatures, hydrolysis is mostly successful. In order to displace the equilibrium towards the desired product, the generated water must be bound or removed from the reaction mixture by way of azeotropic distillation

 

Benefits

  • Controlled and safe heating via heating mantle and power regulator
  • Secure connection of the items by GL screw joint system

Tasks

  • Prepare p-Toluenesulphonic acid from toluene and concentrated sulphuric acid.

 

What you can learn about

  • electrophilic aromatic substitution

  • sulphonation is a reversible reaction

  • azeotropic distillation


Device Name Item no. Qty
Холодильник Димрота MAU-27223500 1,00
Porcelain dish, 75ml, d = 80 mm 32516-00 1,00
Sulphuric acid, 95-97%, 500 ml 30219-50 1,00
Support base DEMO 02007-55 1,00
Rubber tubing, i.d. 6 mm 39282-00 2,00
Beaker, DURAN®, tall form, 150 ml 36003-00 1,00
Crucible tongs, 200 mm, stainless steel 33600-00 1,00
Silicon grease Molykote, 50 g 31863-05 1,00
Beaker, Borosilicate, tall form, 250 ml 46027-00 1,00
Right angle boss-head clamp 37697-00 3,00
Funnel, glass, top dia. 50 mm 34457-00 1,00
Buchner funnel, i.d. = 70, porcelain 32707-00 1,00
Silica gel, orange, granular, 30224-50 1,00
Support rod, stainless steel, l = 600 mm, d = 10 mm 02037-00 2,00
Rubber tubing,vacuum,i.d.6mm 39286-00 1,00
Graduated cylinder, Borosilicate, 100 ml 36629-00 1,00
Wash bottle, plastic, 500 ml 33931-00 1,00
Power regulator 32288-93 1,00
Heating mantle f. roundbottom flask, 100 ml 49541-93 1,00
Universal clamp 37715-00 3,00
Water separator GL25/12 35790-15 1,00
Circular filter,d 70 mm,100 pcs 32977-02 1,00
Toluene 250 30236-25 1,00
Water jet pump, plastic 02728-00 1,00
Glass rod,boro 3.3,l=300mm, d=7mm 40485-05 1,00
Boiling beads, 200 g 36937-20 1,00
Desiccator, vacuum, diam. 150 mm 34126-00 1,00
Porcelain plate f.desiccator150mm 32474-00 1,00
Clamp for heating mantle 49557-01 1,00
Rubber gaskets,conical,set of 8 39265-00 1,00
Round bottom flask, 100ml, GL 25/12 35841-15 1,00
Spoon, special steel 33398-00 1,00
Hose clip, diam. 8-16 mm, 1 pc. 40996-02 2,00
Retort stand, h = 750 mm 37694-00 1,00
Filter flask, 500ml, PN 34.5 34419-01 1,00
Water, distilled 5 l 31246-81 1,00

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