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LCA in decision-making processes

Authors:	Hilmar Brunn Rolf Bretz Peter Fankhauser Thomas Spengler Otto Rentz

Institution:	1. Andersen Consulting, Otto-Volger-Str. 15, D-65483, Sulzbach, Germany 2. Seelenberger Stra?e 6, D-60489, Frankfurt, Germany 3. Ciba Chemikalien GmbH, P.O. Box 1266, D-79630, Grenzach-Wyhlen, Germany 4. French-German Institute for Environmental Research, Karlsruhe University, Hertzstr. 16, D-76187, Karlsruhe, Germany

Abstract:	Synthetic sulfuric acid is used in a wide range of applications in fine chemical industry. Despite an already performed optimization of input amounts, used sulfuric acid is still a quantitatively important waste by-product. As a result, different utilization technologies for used sulfuric acid exist: production of gypsum thermal reductive cracking thermal cracking and oxidation This makes an LCA study of this waste by-product quite interesting. In this paper: ? the starting point for a comparative LCA of the above mentioned utilization technologies at a concrete situation is explained, in a work of Ciba-Geigy Corp. ? a short summary of the comparative LCA is presented ? lessons learned from performing the LCA and using it in a decision process are described.

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