BVT-Merkblatt zu Abwasser- und Abgasbehandlung

Section 5.7.11 The production of polyvinyl chloride
Art. 5.7.11.1
Annexes
§ 1. The provisions of this section are applicable to the establishments producing polyvinyl
chloride referred to in section 7 of the classification list.
§ 2. At the transition from the closed system for polymerisation or drying to the open system,
the residues of vinyl chloride (VC) in the polymerisate must be kept as low as possible. With
this, the following maximum monthly average values may not be exceeded:
� mass-PVC: 10 mg VC / kg PVC
� suspension-homopolymerisates: 0.10 g VC / kg PVC
� suspension-copolymerisates: 0.40 g VC / kg PVC
� micro-suspension-PVC and emulsion-PVC: 1.5 g VC / kg PVC.
§ 3. To further reduce the mass concentration of vinyl chloride in the gaseous effluent, insofar
as possible the spent gas of the drying plant must be used as combustion gas in heating installations.
Section 5.7.12 The production of caprolactam
Art. 5.7.12.1
§ 1. The provisions of this section are applicable to the establishments producing caprolactam,
referred to in section 7 of the classification list.
§ 2. With the production of caprolactam according to the Raschig-process, NO2-emissions may
not exceed 15 kg NOx/tonne of caprolactam produced.
Section 5.7.13 The production of polyacrylonitrile-based synthetic materials
Art. 5.7.13.1
§ 1. The provisions of this section are applicable to the establishments producing polyacrylonitrile-based
synthetic materials, referred to in section 7 of the classification list.
§ 2. The production and processing of propenenitrile-polymerisates for fibres.
1. For the emissions of propenenitrile in the gaseous effluent of the drying plants, an emission
limit value of 20 mg/Nm 3 applies.
2. The propenenitrile-containing spent gases originating from the reaction vessels, from the intensive
waste gas purging, from the suspension tank and from the washing filter, must be
ducted to a spent gas scrubber or an adsorber. For the emissions of propenenitrile in the
gaseous effluent of the adsorber, an emission limit value of 10 mg/Nm 3 applies.
3. With the spinning into fibres of the polymer, the waste gas flows with an propenenitrilecontent
of over 5 mg/Nm 3 must be ducted to an air emission abatement installation for spent
gas.
§ 3. The production of ABS-resins
1. Emulsion polymerisation:
the propenenitrile-containing gaseous effluents released during polymerisation, during precipitation
or with the cleaning of the reactor, must be ducted to an incinerator; for the emissions
of propenenitrile in the gaseous effluent of the drying plant an emission limit value of
25 mg/Nm 3 applies as monthly average;
Waste Water and Waste Gas Treatment 371