Saturday, March 7, 2009

Methylene Chloryde, Isopropyl Alcohol (IPA), Acetone, Tryethylammine Diethylammine Start-up Pharmaceutical Distillation Plants

It's very well completed the start-up of CMG's solvents distillation plants for an anti-biotic pharmaceutical company in IRAN.
The plants are the following:
  • Continuous distillation of Methylene Chloryde
  • Continuous distillation of Isopropyl Alcohol (IPA)
  • Batch/continuous distillation of Acetone (95%)
  • Continuous distillation of Acetone (99%)
  • Recovery-distillation of TEA-DEA (Try ethyl ammine, Di ethyl ammine)
  • Dehydration of Methylene Chloryde
In the following picture the distillation units



In order to design the distillation plants, CMG used the most upgrade distillation design program, and the obtained results of the laboratory tests made by the research centre Polo Tecnologico La Magona. CMG has been part of this technological research centre
The CMG supply is a turn-key comprising distillation units, complete engineering of the storage tanks farm, of the piping and of complete carpentry and pipe-racks. Following the picture of one of the 3d drawing of the whole project.



The goodness of the products of distillation units is confirmed by the client with its request for new distillation unit for other mixtures of solvents.
Following some technical data of the distillation units:
1- Methylene Chloryde Unit
Specification of Feed Flow-rate 1000 Kg/h, recovery 95-99%
Composition of FEED, Distillate, Bottom column product (%w)

FEEDDISTILLATEBOTTOM COLUMN
METHYLENE CHLORYDE87,7499,774.34
METHANOL0,060,0219,56
PIVALIC ACID8,7-----60,79
IPA1,20,053,28
DMAC1,1-----19,56
WATER0,50,160,89
OTHER0.6-----10,77

The distillation is the extractive type. The most important obtained results are: distillate Methylene Chloryde without Methanol (just traces) and the elimination of bad odour from the bottom column's product.The complete dehydration of Methylene Chloryde is done using molecular sieve and regeneration by hot nitrogen.

2- Distillation di Isopropil-alcol (IPA)
Specification :Feed Flow-rate 1100 Kg/h, recovery del 97%
Composition of FEED, Distillate, Bottom column product (%w)


FEEDDISTILLATEBOTTOM COLUMN
IPA38.2979.491.8
TEA1.470.027.43
WATER5813.6486.6
MIBK2.26.50.2
OTHER0.50.13.97

3- Distillation di Acetone
Specification : Feed Flow-rate 800 Kg/h, recovery 95-99%
Composition of FEED, Distillate, Bottom column product (%w)

FEEDDISTILLATEBOTTOM COLUMN
ACETONE53.1599.30.99
WATER44.360.4894.17
DMF1,26----3.18
METHANOL0.950.070.94
OTHER0.280.150.72

The first distillation unti is a extractive distillation, it permits to split Methanol from Acetone and other solvents. The second distillation unit is a "classical" continuous distillation plant. In order to have the maximum operative flexibility the first distiallation plant can be utilized either in batch configuration or in continuous configuration.

4- Recovery and distillation of TEA - DEA (try ethyl ammine, Diethyl ammine)
Specification: INITIAL FEED =3000-3500 KgComposition of FEED, Distillate, Bottom column product (%w)

FEEDSolvents after 1° distillationBefore the final distiallation
TEA25.410.1391.73
IPA1559.74.07
ACETONE18.75---0.17
MIBK14.2110.270.14
METHANOL0.591.09-----
DEA0.12---0.17
WATER25.3128.753.14
OTHER0.610.610.04

Following the process description of TEA, it's a batch procedure.
  • The salification of initial solution with HCl
  • Phase separation: the light (organic) phase is sent to thermal oxidation, the acqueous phase is storaged for the successive phase
  • Distillation to remove residual solvents;
  • Basification of the residue of distillation using NaOH solution;
  • Phase separation at about to limit the solubility of water in TEA: heavy (aqueous) phase is sent to thermal oxidation.
  • Storing of the organic phase, so that we can accumulate enough amount to be distilled;
  • Distillation to recover TEA.
more info see : http://www.cmgimpianti.com

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