Exhibit 23.3
CONSENT OF INDEPENDENT ACCOUNTANTS
We hereby consent to the incorporation by reference in this Registration Statement on Form S-8of PQ Group Holdings Inc. of our report dated March 25, 2016,relating to the financial statements of PQ Holdings Inc., which appears in PQ Group Holdings Inc.’s Registration Statement on Form S-1 (No. 333-218650).
/s/ PricewaterhouseCoopers LLP
Philadelphia, Pennsylvania
October 2, 2017