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Celanese Granted Four New Patents for Sunett® Sweetener

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

Celanese Corporation (NYSE: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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