Celanese Granted Four New Patents for Sunett® Sweetener

Latest patents enhance manufacturing process for acesulfame potassium high intensity sweetener products

Celanese Corporation CE, a global specialty materials company, today announced it has been granted four new patents by the United States Patent and Trademark Office (USPTO) covering manufacturing process improvements to produce acesulfame potassium (Ace-K).

The patents granted by the USPTO (US 10,023,546; US 10,029,998; US 10,029,999; and US 10,030,000) all provide substantial technology advantages to Celanese and its customers for the production and quality of Sunett® Ace-K sweetener. With the issuance of such patents, these technology advantages are recognized as exclusive to Celanese, thereby increasing the benefit to customers by ensuring the highest quality and reliability standards of its Sunett® portfolio.

"As the inventor and only Western producer of Sunett® Ace-K, Celanese has developed a series of best practices to deliver one of the industry's highest quality artificial sweeteners, ensuring product purity, supply reliability and accountability," said Scott Sutton, Chief Operating Officer. "Celanese continuously invests in manufacturing and quality improvements and is dedicated to robust research, development and customer support for the sweetener products manufactured by our patented process. We are pleased that the USPTO has granted Celanese these patents, which will continue to place Celanese as a leading, global high intensity sweetener manufacturer. We intend to vigorously defend our patented technology against unlawful importation and uses in the United States."

Two hundred times sweeter than sugar, Sunett® Ace-K is a zero-calorie, dental-friendly, high-intensity sweetener manufactured in a single-purpose plant with unique and patented processing steps. It provides optimized applicability and consistent sweetness profiles for better taste and excellent blending characteristics. Demand for high quality Ace-K continues to grow as consumers look for alternatives to full-sugar products.

About Celanese

Celanese Corporation is a global technology leader in the production of differentiated chemistry solutions and specialty materials used in most major industries and consumer applications. Our businesses use the full breadth of Celanese's global chemistry, technology and commercial expertise to create value for our customers, employees, shareholders and the corporation. As we partner with our customers to solve their most critical business needs, we strive to make a positive impact on our communities and the world through The Celanese Foundation. Based in Dallas, Celanese employs approximately 7,700 employees worldwide and had 2017 net sales of $6.1 billion. For more information about Celanese Corporation and its product offerings, visit www.celanese.com or our blog at www.celaneseblog.com.

All registered trademarks are owned by Celanese International Corporation or its affiliates.

Forward-Looking Statements

This release may contain "forward-looking statements," which include information concerning the company's plans, objectives, goals, strategies, future revenues or performance, and other information that is not historical information. All forward-looking statements are based upon current expectations and beliefs and various assumptions. There can be no assurance that the company or its customers will realize these benefits or that these expectations will prove correct. There are a number of risks and uncertainties that could cause actual results to differ materially from the forward-looking statements contained in this release. Numerous factors, many of which are beyond the company's control, could cause actual results to differ materially from those expressed as forward-looking statements. Other risk factors include those that are discussed in the company's filings with the Securities and Exchange Commission. Any forward-looking statement speaks only as of the date on which it is made, and the company undertakes no obligation to update any forward-looking statements to reflect events or circumstances after the date on which it is made or to reflect the occurrence of anticipated or unanticipated events or circumstances.

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