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Revenue from Contracts with Customers Revenue from Contracts with Customers (Tables) | 6 Months Ended
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Jun. 30, 2021
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The Company’s portfolio of products is integrated into a variety of end uses, which are described in the table below.
Key End Uses | Key Products
Industrial & process chemicals | • Sulfur derivatives for industrial production
| • Treatment services
Fuels & emission control | • Refining catalysts
| • Emission control catalysts
| • Catalyst recycling services
Packaging & engineered plastics | • Catalysts for high-density polyethylene and chemicals syntheses
| • Antiblock for film packaging
| • Sulfur derivatives for nylon production
Natural resources | • Sulfur derivatives for mining
The following tables disaggregate the Company’s sales, by segment and end use, for the three and six months ended June 30, 2021 and 2020:
| Three months ended June 30, 2021
| Ecoservices |  | Silica Catalysts |  |  |  |  |  | Total
Industrial & process chemicals | $ | 18,341 |  |  | $ | — |  |  |  |  |  |  | $ | 18,341 |
Fuels & emission control(1) | 68,794 |  |  | — |  |  |  |  |  |  | 68,794 |
Packaging & engineered plastics | 14,979 |  |  | 26,215 |  |  |  |  |  |  | 41,194 |
Natural resources | 18,627 |  |  | — |  |  |  |  |  |  | 18,627 |
Total segment sales | $ | 120,741 |  |  | $ | 26,215 |  |  |  |  |  |  | $ | 146,956 |
Eliminations | (4) |  |  | — |  |  |  |  |  |  | (4) |
Total | $ | 120,737 |  |  | $ | 26,215 |  |  |  |  |  |  | $ | 146,952 |
| Three months ended June 30, 2020
| Ecoservices |  | Silica Catalysts |  |  |  |  |  | Total
Industrial & process chemicals | $ | 16,713 |  |  | $ | 2 |  |  |  |  |  |  | $ | 16,715 |
Fuels & emission control(1) | 50,682 |  |  | — |  |  |  |  |  |  | 50,682 |
Packaging & engineered plastics | 7,473 |  |  | 25,206 |  |  |  |  |  |  | 32,679 |
Natural resources | 15,565 |  |  | — |  |  |  |  |  |  | 15,565 |
Total segment sales | $ | 90,433 |  |  | $ | 25,208 |  |  |  |  |  |  | $ | 115,641 |
|  | Six months ended June 30, 2021
|  | Ecoservices |  | Silica Catalysts |  |  |  |  |  | Total
Industrial & process chemicals |  | $ | 35,288 |  |  | $ | — |  |  |  |  |  |  | $ | 35,288 |
Fuels & emission control(1) |  | 123,987 |  |  | — |  |  |  |  |  |  | 123,987 |
Packaging & engineered plastics |  | 25,600 |  |  | 52,617 |  |  |  |  |  |  | 78,217 |
Natural resources |  | 36,088 |  |  | — |  |  |  |  |  |  | 36,088 |
Total segment sales |  | $ | 220,963 |  |  | $ | 52,617 |  |  |  |  |  |  | $ | 273,580 |
Eliminations |  | (4) |  |  | — |  |  |  |  |  |  | (4) |
Total |  | $ | 220,959 |  |  | $ | 52,617 |  |  |  |  |  |  | $ | 273,576 |
|  | Six months ended June 30, 2020
|  | Ecoservices |  | Silica Catalysts |  |  |  |  |  | Total
Industrial & process chemicals |  | $ | 36,072 |  |  | $ | 49 |  |  |  |  |  |  | $ | 36,121 |
Fuels & emission control(1) |  | 106,393 |  |  | — |  |  |  |  |  |  | 106,393 |
Packaging & engineered plastics |  | 18,206 |  |  | 50,023 |  |  |  |  |  |  | 68,229 |
Natural resources |  | 30,452 |  |  | — |  |  |  |  |  |  | 30,452 |
Total segment sales |  | $ | 191,123 |  |  | $ | 50,072 |  |  |  |  |  |  | $ | 241,195 |
(1)As described in Note 1, the Company experiences seasonal s ales fluctuations to customers in the fuels & emission control end use.

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