Agreement and General Release, dated September 12, 2017, between Celanese Corporation and Patrick D. Quarles

Celanese Corporation, its’ subsidiaries and its affiliates (“Company” or “Celanese”), 222 W. Las Colinas Blvd., Irving, Texas 75039 and Pat Quarles, such person’s heirs, executors, administrators, successors, and assigns (“Executive”), agree that:

1.     Last Day of Employment. The last day of employment with the Company is: December 31, 2017 (“Separation Date”) and his last day of work in the office will be September 29, 2017. Unless otherwise expressly agreed to by the Company, if Executive voluntarily resigns with effect before the last day of work in the office, Executive shall immediately be removed from the payroll and forfeit all rights to the Consideration set forth in Paragraph 3 below. In order to remain on the payroll until the Separation Date (or Early Separation Date, as applicable) and receive the Consideration set forth in Paragraph 3 below, during the period of time prior to September 29, 2017, Executive shall comply with all Company policies and procedures and perform Executive’s duties faithfully, to the best of Executive’s ability and to the satisfaction of the Company and to the promotion of its business as needed, including but not limited to work on projects assigned to Executive and assistance with transition duties. Before and after Executive ceases working in the office, he will be permitted to engage in activities during regular business hours related to his efforts to pursue other professional opportunities.

2.     Early Separation Date. If Executive chooses a voluntary Separation Date earlier than the Separation Date set forth above (such date referenced as the “Early Separation Date” or “ESD”), Executive will be released as of the ESD. Executive will still be eligible for the Consideration set forth in Paragraph 3 of this Agreement and General Release (“Agreement”). However, Executive agrees to waive any additional salary payment for the balance of the time period commencing on the date of the ESD through the Separation Date. In addition, Long Term Equity Agreements (LTI’s), vacation payout and healthcare coverage set forth in Paragraphs 3 (c), (e), and (f) below, respectively, will be prorated to the ESD. For purposes of this Agreement, the last day of employment will be either the Separation Date or ESD, whichever is applicable.

3.     Consideration. Each separate installment under this Agreement shall be treated as a separate payment for purposes of determining whether such payment is subject to or exempt from compliance with the requirements of Section 409A of the Internal Revenue Code. In consideration for signing this Agreement and compliance with the promises made herein, Company and Executive agree:

 

balances for any personal expenses charged on the Company credit card which have not already been reconciled.

4.No Consideration Absent Execution of this Agreement. Executive understands and agrees that Executive would not receive the monies and/or benefits specified in Paragraph 3 above, unless Executive signs this Agreement on the signature page without having revoked this Agreement pursuant to Paragraph 16 below, signs the letters at Exhibit A, C, D and E and fulfills the promises contained herein.

5.General Release of Claims. Except as otherwise set forth herein, Executive knowingly and voluntarily releases and forever discharges, to the full extent permitted by law, in all countries, including but not limited to the U.S., the People’s Republic of China (PRC), U.K. and Germany, the Company, its parent corporation, affiliates, subsidiaries, divisions, predecessors, successors and assigns and the current and former employees, officers, directors and agents thereof (collectively referred to throughout the remainder of this Agreement as “Company”), of and from any and all claims, known and unknown, asserted and unasserted, Executive has or may have against Company as of the date of execution of this Agreement, including, but not limited to, any alleged violation of:

6.Affirmations. Executive affirms that Executive has not filed, caused to be filed, or presently is a party to any claim, complaint, or action against Company in any forum or form. Provided, however, that the foregoing does not affect any right to file an administrative charge with the Equal Employment Opportunity Commission (“EEOC”), OSHA, The National Labor Relations Board (“NLRB”), or a charge or complaint under applicable securities laws with the Securities and Exchange Commission (“SEC”) or any other federal, state, or municipal agency with appropriate jurisdiction (a “Government Agency”), subject to the restriction that if any such charge or complaint is filed, Employee agrees not to violate the confidentiality provisions of this Agreement, except by an order of a court having competent jurisdiction, if permitted by applicable law, or if in connection with confidential communications with a Government Agency or an investigation conducted by a Government Agency with appropriate jurisdiction. Employee further agrees and covenants that should Executive or any other person, organization, or other entity file, charge, claim, sue or cause or permit to be filed any charge or claim with the EEOC, or any civil action, suit or legal proceeding against the Company involving any matter occurring at any time in the past, Executive will not seek or accept any personal relief (including, a judgment, relief or settlement) in such charge, civil action, suit or proceeding, unless permitted under law or regulation. This Agreement does not limit Executive’s right to receive an award for information provided to the SEC. Executive further affirms that Executive has reported all hours worked as of the date of this Agreement and has been paid and/or has received all leave (paid or unpaid), compensation, wages, bonuses, commissions, and/or benefits to which Executive may be entitled and that no other leave (paid or unpaid), compensation, wages, bonuses. commissions and/or benefits are due to Executive, except as provided in this Agreement. Executive furthermore affirms that Executive has no known workplace injuries or occupational diseases.

7.Confidentiality. Executive and the Company agree not to disclose any information regarding the existence or substance of this Agreement, except to Executive's spouse, tax advisor, and an attorney with whom Executive chooses to consult regarding Executive's consideration of this Agreement or as permitted by applicable law. Executive agrees and recognizes that any knowledge or information of any type whatsoever of a confidential nature relating to the business of the Company or any of its subsidiaries, divisions or affiliates, including, without limitation, all types of trade secrets, client lists or information, employee lists or information, information regarding product development, marketing plans, management organization, operating policies or manuals, performance results, business plans, financial records, or other financial commercial

business or technical information (collectively "Confidential Information”), must be protected as confidential, not copied, disclosed or used other than for the benefit of the Company at any time unless and until such knowledge or information is in the public domain through no wrongful act by Executive. Executive further agrees not to divulge to anyone (other than the Company or any persons employed or designated by the Company), publish or make use of any such Confidential Information without the prior written consent of the Company, except by an order of a court having competent jurisdiction or if in connection with confidential communications with a Government Agency or an investigation conducted by a Government Agency with appropriate jurisdiction.

8.Notification of Allowable Disclosure of Trade Secret Information in the United States. Executive may not be held criminally or civilly liable under any federal or state trade secret law for the disclosure of a trade secret that: (a) is made (i) in confidence to a federal, state, or local government official, either directly or indirectly, or to an attorney; and (ii) solely for the purpose of reporting or investigating a suspected violation of law; or (b) is made in a complaint or other document that is filed under seal in a lawsuit or other proceeding. Further, if Executive files a lawsuit against the Company alleging retaliation for reporting a suspected violation of law, the Executive may disclose the trade secret to Executive's attorney. Executive may also use the trade secret information in a court proceeding, provided that he or she files any document containing the trade secret under seal and does not disclose the trade secret except pursuant to a court order.

9.Non-competition/Non-solicitation/Non-hire. Executive acknowledges and recognizes the highly competitive and confidential nature of the business of the Company. The Long-Term Incentive Award Claw-Back Agreement (“Claw-Back Agreement”) and the New Employee Restrictive Covenant Agreement (“RCA”), dated May 15, 2015 and June 11, 2015 respectively, copies of which have been provided to Executive, (collectively “Claw-Back/RCA Agreements"), include, among other obligations, promises made by Executive regarding safeguarding confidential Company information, non-competition with the Company and the non-solicitation/no hire of current employees and contractors. Both the Claw-Back Agreement and the RCA remain in full force and effect and are part of this Agreement, except to the extent they are modified below.

The Clawback/RCA Agreements and all other agreements executed by Executive which contain non-compete provisions are modified as follows: The non-competition provisions will only prohibit Executive from being employed by BP plc., Eastman Chemical Company, Lyondell Basell Industries N.V., Wacker Chemie AG, Saudi International Petrochemical Company, d/b/a SIPCHEM, Daicel Corporation, Darien Chemical Corporation or any company with operations in China that manufactures, sells, distributes or markets product similar to Celanese's acetyl products or any company that is a subsidiary of those companies. With respect to the Dow Chemical Company (Dow), Executive agrees to not become employed by the Dow unit that manufactures, sells, distributes, or markets Vinyl Acetate Monomer (VAM), such that VAM would not be a significant element, (greater than 10%), of Executive's oversight. The Restricted Period is two years from the earlier of the Separation Date or ESD.

10.Governing Law and Interpretation. This Agreement shall be governed and construed in accordance with the laws of the State of Texas, without regard to its conflict of laws provision. In the event Executive or Company breaches any provision of this Agreement, Executive and Company

affirm that either may institute an action to specifically enforce any term or terms of this Agreement. Should any provision of this Agreement be declared illegal or unenforceable by any court of competent jurisdiction and cannot be modified to be enforceable, excluding the general release language, such provision shall immediately become null and void, leaving the remainder of this Agreement in full force and effect.

11.Non-admission of Wrongdoing. The parties agree that neither this Agreement nor the furnishing of the consideration for this Release shall be deemed or construed at any time for any purpose as an admission by Company of any liability or unlawful conduct of any kind.

12.Non-Disparagement. Executive agrees not to disparage, or make disparaging remarks or send any disparaging communications concerning, the Company, its reputation, its business, and/or its directors, officers, managers. Likewise the Company’s senior management agrees not to disparage, or make any disparaging remark or send any disparaging communication concerning Executive, her reputation and/or her business.

13.Future Cooperation after Separation Date. After the Separation Date, Executive agrees to make reasonable efforts to assist Company including but not limited to: responding to telephone calls, assisting with transition duties, assisting with issues that arise after the Separation Date and assisting with the defense or prosecution of any lawsuit or claim. This includes but is not limited to providing deposition testimony, attending hearings and testifying on behalf of the Company. The Company will reimburse Executive for reasonable time and expenses in connection with any future cooperation after the Separation Date, at her current annual base pay, converted to an hourly rate. Time and expenses can include loss of pay or using vacation time at a future employer. The Company shall reimburse the Executive within 30 days of remittance by Executive to the Company of such time and expenses incurred.

14.Injunctive Relief. Executive agrees and acknowledges that the Company will be irreparably harmed by any breach, or threatened breach by her of this Agreement and that monetary damages would be grossly inadequate. Accordingly, she agrees that in the event of a breach, or threatened breach by him of this Agreement the Company shall be entitled to apply for immediate injunctive or other preliminary or equitable relief, as appropriate, in addition to all other remedies at law or equity.

15.Review Period. Executive is hereby advised Executive has up to twenty-one (21) calendar days, from the date Executive receives it, to review this Agreement and to consult with an attorney prior to execution of this Agreement. Executive agrees that any modifications, material or otherwise, made to this Agreement do not restart or affect in any manner the original twenty-one (21) calendar day consideration period.

16.Revocation Period and Effective Date. If Executive signs and returns to the Company a copy of this Agreement, Executive has a period of seven (7) days (the “Revocation Period”) following the date of such execution to revoke this Agreement, after which time this agreement will become effective (the “Effective Date”) if not previously revoked. In order for the revocation to

be effective, written notice must be received by the Company no later than close of business on the seventh day after Executive signs this Agreement at which time the Revocation Period shall expire.

17.Amendment. This Agreement may not be modified, altered or changed except upon express written consent of both parties wherein specific reference is made to this Agreement.

18.Entire Agreement. This Agreement sets forth the entire agreement between the parties hereto, and fully supersedes any prior obligation of the Company to Executive. Executive acknowledges that Executive has not relied on any representations, promises, or agreements of any kind made to Executive in connection with Executive’s decision to accept this Agreement, except for those set forth in this Agreement.

19.HAVING ELECTED TO EXECUTE THIS AGREEMENT, TO FULFILL THE PROMISES AND TO RECEIVE THE SUMS AND BENEFITS IN PARAGRAPH 2 ABOVE, EXECUTIVE FREELY AND KNOWINGLY, AND AFTER DUE CONSIDERATION, ENTERS INTO THIS AGREEMENT INTENDING TO WAIVE, SETTLE AND RELEASE ALL CLAIMS EXECUTIVE HAS OR MIGHT HAVE AGAINST COMPANY.

IN WITNESS WHEREOF, the parties hereto knowingly and voluntarily executed this Agreement as of the following date: 12 September 17.

This letter confirms that on September 12, 2017, I personally delivered to you the enclosed Agreement and General Release. You have until October 3, 2017 which is at least 21 days after receipt, to consider this Agreement and General Release, in which you waive important rights, including those under the Age Discrimination in Employment Act. To this end, we advise you to consult with an attorney of your choosing prior to executing this Agreement and General Release.

To: Scott Sutton

From: Pat Quarles

Date: 12 Spt 17

Subject: Letter of Voluntary Resignation

The purpose of this letter is to inform you that I have decided to voluntarily resign from Celanese. The effective date of my departure and my resignation as an employee will December 31, 2017 (Separation Date) unless I elect to terminate my employment sooner pursuant to the terms of our Agreement (Early Separation Date). As of September 29, 2017, I hereby resign from any and all positions I may hold as a corporate officer, director, committee member or manager of the Company and its subsidiaries and affiliates (including without limitation any positions as an officer, committee member, employee, manager and/or director), and from all positions held on behalf of the Company (e.g., external and joint venture board memberships, internal committee positions, etc.).

Performance- and Time-Based RSUs: Prorate on termination date and payout on original vesting date

(1) 2016 and 2017 Performance-Based RSUs will be cancelled on separation date

On September 12, 2017, I executed an Agreement and General Release between Celanese and me. I was advised by Celanese, in writing, to consult with an attorney of my choosing, prior to executing the Agreement and General Release.

I have at no time revoked my acceptance or execution of that Agreement and General Release and hereby reaffirm my acceptance of that Agreement and General Release.

I hereby reaffirm and acknowledge that the Agreement and General Release executed on September 12, 2017, also applies from the date it was executed until my last day of employment today, December 31,2017.

On September 12, 20 17, I executed an Agreement and General Release between Celanese and me, and on December 31, 2017 I executed a Supplemental Agreement and General Release (Exhibit D). I was advised by Celanese, in writing, to consult with an attorney of my choosing, prior to executing this Agreement and General Release.

I have at no time revoked my acceptance or execution of the Agreement and General Release or the Supplemental Agreement and General Release and hereby reaffirm my acceptance of both agreements. Therefore, in accordance with the terms of our Agreement and General Release, I hereby request payment of the Consideration described in Paragraph 3 pursuant to the terms of that Agreement.