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Revenue from Contracts with Customers Revenue from Contracts with Customers (Tables)
 12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
The Company’s portfolio of products are integrated into a variety of end uses, which are described in the table below:
Key End UsesKey Products
Industrial & process chemicals• Sulfur derivatives for industrial production
• Treatment services
Fuels & emission control• Refining hydrocracking catalysts
• Emission control catalysts
• Catalyst recycling regeneration services
Packaging & engineered plastics• Catalysts for high-density polyethylene and chemicals syntheses
• Antiblocks for film packaging
• Sulfur derivatives for nylon production
Natural resources• Sulfur derivatives for mining
The following table disaggregates the Company’s sales, by segment and end use, for the years ended December 31, 2021, 2020 and 2019:
Year ended December 31, 2021
EcoservicesCatalyst TechnologiesTotal
Industrial & process chemicals$88,844 $— $88,844 
Fuels & emission control(1)
257,070 — 257,070 
Packaging & engineered plastics71,991 110,688 182,679 
Natural resources82,608 — 82,608 
Total$500,513 $110,688 $611,201 
Year ended December 31, 2020
EcoservicesCatalyst TechnologiesTotal
Industrial & process chemicals$70,648 $125 $70,773 
Fuels & emission control(1)
225,042 — 225,042 
Packaging & engineered plastics38,772 93,882 132,654 
Natural resources67,451 — 67,451 
Total$401,913 $94,007 $495,920 
Year ended December 31, 2019
EcoservicesCatalyst TechnologiesTotal
Industrial & process chemicals$80,661 $109 $80,770 
Fuels & emission control(1)
252,293 — 252,293 
Packaging & engineered plastics48,056 85,558 133,614 
Natural resources66,070 — 66,070 
Total$447,080 $85,667 $532,747 
(1)    As described in Note 1, the Company experiences seasonal sales fluctuations to customers in the fuels & emission control end use.