Subject of the current case:
application of the mixing tank for a batch organic synthesis process that includes two parallel homogeneous reactions.
The main product is obtained as a result of a second order reaction between reactant A and B as A + B > C, the specific reaction rate is estimated as 0.12 l/(mol.s). Along with the main product, some quantity of a by-product is formed as a result of the parallel reaction: B+B>D with specific reaction rate 0.006 l/(mol.s).
Before start of the process the reactor is filled with solution of reactant A (concentration is 0.8 g-mol/l).
The equimolecular quantity (B/A = 1) of the reactant B is added instantly on the surface of liquid, on some distance – about 300 mm – from the tank wall. Sensor is placed at bottom of the tank.

Reactor data

Tank Elliptical bottom:

  • Inside diameter = 1800 mm
  • Total volume = 5200 L
  • Volume of media = 4600 L

Baffle (Flat, at a distance to the tank wall):

  • Number = 4
  • Width = 160 mm;
  • Length = 1700 mm;
  • Distance from bottom = 450 mm.
  • Distance from the wall = 50 mm
  • Angle to radius = 0 deg.

Impeller:

  • Pitched Paddle – 4 blades, pitch angle = 30 deg.
  • Tip diameter = 600 mm
  • Width of blade = 120 mm
  • Distance from bottom = 400 mm.
  • Rotational speed = 100 rpm
  • Power of drive = 8 kW

Media properties:

  • Type of media = Newtonian
  • Density = 1050 kg/cub. m
  • Dynamic viscosity = 2 cP
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Test 2 – Batch chemical reaction

Subject of the current case:
application of the mixing tank for a batch organic synthesis process that includes two parallel homogeneous reactions.
The main product is obtained as a result of a second order reaction between reactant A and B as A + B > C, the specific reaction rate is estimated as 0.12 l/(mol.s). Along with the main product, some quantity of a by-product is formed as a result of the parallel reaction: B+B>D with specific reaction rate 0.006 l/(mol.s).
Before start of the process the reactor is filled with solution of reactant A (concentration is 0.8 g-mol/l).
The equimolecular quantity (B/A = 1) of the reactant B is added instantly on the surface of liquid, on some distance – about 300 mm – from the tank wall. Sensor is placed at bottom of the tank.

Reactor data

Tank Elliptical bottom:

  • Inside diameter = 1800 mm
  • Total volume = 5200 L
  • Volume of media = 4600 L

Baffle (Flat, at a distance to the tank wall):

  • Number = 4
  • Width = 160 mm;
  • Length = 1700 mm;
  • Distance from bottom = 450 mm.
  • Distance from the wall = 50 mm
  • Angle to radius = 0 deg.

Impeller:

  • Pitched Paddle – 4 blades, pitch angle = 30 deg.
  • Tip diameter = 600 mm
  • Width of blade = 120 mm
  • Distance from bottom = 400 mm.
  • Rotational speed = 100 rpm
  • Power of drive = 8 kW

Media properties:

  • Type of media = Newtonian
  • Density = 1050 kg/cub. m
  • Dynamic viscosity = 2 cP

The Average concentration of product is around:

The Average concentration of by-product is around:

By-product quantity formation expected is around:

What is the macro mixing time? S

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