de - Beste verfügbare Techniken (BVT) - Umweltbundesamt

Chapter 2
Co-solvent
Acid,
alcohol,
catalyst,
entrainer
Phase
separation
Esterification VOC
Product
Reaction water,
solvent,
alcohol,
entrainer
Figure 2.15: Typical sequence of operations for esterification
Possible input materials (on the left) and the associated waste streams (grey background)
Environmental issues
Table 2.12 gives some example data for waste water streams from esterifications. Figure 2.16
shows the applied abatement techniques.
Waste water stream Properties
Bioeliminability of organic esters
BOD5 DOC elimination after
mg/l 7 days (Static test) in %
Methyl acetate 500 >95
Ethyl acetate 770 >90
Vinyl acetate 810 >90
Butyl acetate 1000 >95
2-Methoxyethyl acetate 450 100
2-Butoxyethyl acetate 260 100
2-(2-Butoxyethoxy)ethyl acetate 380 100
Methylaceto acetate 940 100
Ethylaceto acetate 780 >90
n-Butyl glycolate 570 93
Methyl crotonate 1050 >95
Dimethylacetyl succinate 1100 >95
Diethylacetyl succinate 1070 >95
Dimethyl maleate 20 100
Monomethyl maleate 150 >95
Diethyl maleate 200 >90
Dibutyl maleate 630 99
Di(2-ethylhexyl) maleate 1450 100
Methyl-3-amino benzoate 10 95
Methyl-4-hydroxy benzoate 1080 100
Methyl-4-hydroxyphenyl acetate 320 98
Table 2.12: Example data for waste water streams from esterification
Reference
[6, Ullmann, 2001]
46 Dezember 2005 OFC_BREF