Réaction #417397

Équation de réaction

phosphorous acid

formaldehyde

HCl

formaldehyde

Triethylenetetramine

→

Triethylenetetramine Phosphonate

Solvants

Conditions de réaction

Traitement

1. 1
   TempératureThe mixture is then heated
2. 2
   Températureto reflux
3. 3
   TempératureReflux
4. 4
   Températureis maintained for 2 hours
5. 5
   Températureis cooled

Mode opératoire

To a 1 liter 5 neck flask fitted with a reflux condenser and dropping funnel is added 234.3 grams (2 mole) 70% phosphorous acid. Triethylenetetramine, 146 grams (1 mole) is then added dropwise while stirring, followed by 146 grams (4 moles) anhydrous HCl. The mixture is then heated to reflux and 162.2 grams (2 moles) 37% aqueous formaldehyde is added dropwise over 1 hour. Reflux is maintained for 2 hours after formaldehyde addition is complete, after which the reaction mixture containing the amino methylene phosphonic acid product is cooled and bottled.

Source