Name two industrial processes in which heterogeneous catalysts are employed.

Explanation

### Step-by-Step Solution:

1. **Understanding Heterogeneous Catalysis**:
- Heterogeneous catalysis involves a catalyst that is in a different phase than the reactants. Typically, this means that the catalyst is solid while the reactants are gases or liquids.

2. **Identifying Industrial Processes**:
- We need to identify industrial processes that utilize heterogeneous catalysts.

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