Chemical Industry: Wet Scrubber Passes Acid Anhydride Test A leading U.S. chemical company upgraded air pollution control of maleic anhydride fumes at one of its overseas plants by installing a venturi scrubber. Selection of the scrubber was based on a pilot study to determine the percentage recovery and the maximum solution concentration of maleic anhydride that could be achieved using a wet scrubber. One significant reason for pretesting the installation is that maleic anhydride fumes sublime. This makes it· impractical to predict particle size and calculate removal efficiencies in advance. Reasons for selecting this type scrubber were: its capability of entraining and scrubbing large volumes of fumes without the use of fans or other moving parts in the air stream. scrubbed product can b

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