Final answer:
Rillieux's invention improved the efficiency of existing industries.
Step-by-step explanation:
The main impact of Rillieux's invention on industries beyond sugar production was that it improved the efficiency of existing industries. Rillieux's invention was a multiple-effect evaporator, which greatly increased the efficiency of the sugar refining process. This invention led to the development of other industries that could benefit from increased efficiency, such as chemical processing and pharmaceutical manufacturing.
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