Annual report pursuant to Section 13 and 15(d)

PLANT, PIPELINE AND EQUIPMENT

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PLANT, PIPELINE AND EQUIPMENT
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
PLANT, PIPELINE AND EQUIPMENT PLANT, PIPELINE AND EQUIPMENT
Plant, pipeline and equipment include the following at December 31:
2021 2020
(thousands of dollars)
Platinum catalyst $ 1,478  $ 1,580 
Catalyst 4,325  4,325 
Land 5,428  5,428 
Plant, pipeline and equipment 282,780  270,149 
Construction in progress 7,213  6,422 
Total plant, pipeline and equipment 301,224  287,904 
Less accumulated depreciation (115,703) (100,800)
Net plant, pipeline and equipment $ 185,521  $ 187,104 
Plant, pipeline and equipment serve as collateral for our amended and restated loan agreement with a domestic bank (see Note 13).
Labor capitalized for construction for 2021, 2020 and 2019 was approximately $0.6 million, $0.6 million and nil, respectively.