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Investments in Affiliated Companies
6 Months Ended
Jun. 30, 2020
Equity Method Investments and Joint Ventures [Abstract]  
Investments in Affiliated Companies
11. Investments in Affiliated Companies:
The Company accounts for investments in affiliated companies under the equity method. Affiliated companies accounted for on the equity basis as of June 30, 2020 are as follows:
CompanyCountryPercent
Ownership
PQ Silicates Ltd.Taiwan50%
Zeolyst InternationalUSA50%
Zeolyst C.V.Netherlands50%
 Asociacion para el Estudio de las Tecnologias de Equipamiento de Carreteras, S.A. (“Aetec”)
Spain20%
Following is summarized information of the combined investments(1)
Three months ended
June 30,
Six months ended
June 30,
2020201920202019
Sales$88,161  $89,938  $159,368  $158,032  
Gross profit34,470  35,137  65,609  54,551  
Operating income24,688  27,052  45,697  36,259  
Net income26,333  27,910  46,368  37,150  

(1)Summarized information of the combined investments is presented at 100%; the Company’s share of the net assets and net income of affiliates is calculated based on the percent ownership specified in the table above.
In March 2020, the Company sold its 49% interest in the Quaker Holdings joint venture to a third party. Prior to the Company’s disposition of its shares in the joint venture, the Company received a liquidating dividend of $729 as well as $1,032 for the sale of the joint venture shares, which was included in the proceeds from sale of investment within the investing activities section of the Company’s consolidated statement of cash flows.
The Company’s investments in affiliated companies balance as of June 30, 2020 and December 31, 2019 includes net purchase accounting fair value adjustments of $247,215 and $250,532, respectively, related to the series of transactions consummated on May 4, 2016 to reorganize and combine the businesses of PQ Holdings Inc. and Eco Services Operations LLC, consisting primarily of goodwill and intangible assets such as customer relationships, technical know-how and trade names. Consolidated equity in net income from affiliates is net of $1,659 and $3,317 of amortization expense related to purchase accounting fair value adjustments for the three and six months ended June 30, 2020, respectively. Consolidated equity in net income from affiliates is net of $1,659 and $4,217 of amortization expense related to purchase accounting fair value adjustments for the three and six months ended June 30, 2019, respectively.