Celanese Corporation

Throughout the remainder of this article the term homopolymer refers to Delrin acetal resin manufactured and sold by Du Pont the term copolymer refers to Celcon acetal copolymer resins (registered trademark of Hoechst Celanese Corporation). 

E.I. du Pont de Nemours Company, Inc. Hoechst Celanese Corporation Ultraform Company Mexico... 

The world s largest producers are Perstorp AB (Sweden, United States, Italy), Hoechst Celanese Corporation (United States, Canada), Degussa (Germany), and Hercules (United States) with estimated 1989 plant capacities of 65,000, 59,000, 30,000, and 22,000 t/yr, respectively. Worldwide capacity for pentaerythritol production was 316,000 t in 1989, about half of which was from the big four companies. Most of the remainder was produced in Asia (Japan, China, India, Korea, and Taiwan), Europe (Italy, Spain), or South America (Brazil, Chile). The estimated rate of production for 1989 was about 253,000 t or about 80% of nameplate capacity. 

H. Robert Gerberich George C. Seaman Hoechst-Celanese Corporation... 

The present North American market is dominated by Du Pont, no doubt by virtue of their early lead other suppHers are AlliedSignal with Petra and Hoechst Celanese Corporation with Impet. Eastman also markets PET injection mol ding grades under the trade name Thermx. In Europe the situation... 

In 1953 the Celanese Corporation of America introduced a route for the production of vinyl acetate from light petroleum gases. This involved the oxidation of butane which yields such products as acetic acid and acetone. Two derivatives of these products are acetic anhydride and acetaldehyde, which then react together to give ethylidene diacetate (Figure 14.2.)... 

The first commercially available acetal resin was marketed by Du Pont in 1959 under the trade name Delrin after the equivalent of ten million pounds had been spent in research or polymers of formaldehyde. The Du Pont monopoly was unusually short lived as Celcon, as acetal copolymer produced by the Celanese Corporation, became available in small quantities in 1960. This material became commercially available in 1962 and later in the same year Farbwerke Hoechst combined with Celanese to produce similar products in Germany (Hostaform). In 1963 Celanese also combined with the Dainippon Celluloid Company of Osaka, Japan and Imperial Chemical Industries to produce acetal copolymers in Japan and Britain respectively under the trade names Duracon and Alkon (later changed to Kematal). In the early 1970s Ultraform GmbH (a joint venture of BASF and Degussa) introduced a copolymer under the name Ultraform and the Japanese company Asahi Chemical a homopolymer under the name Tenal. 

Formaldehyde is also produced by the oxidation of light petroleum gases, a process which also yields methanol and acetaldehyde. This process is currently used in the Celanese Corporation plant for the production of Celcon. 

An alternative approach to the production of thermally stable polyoxy-methylenes was made by chemists of the Celanese Corporation of America and the commercial products were marketed as Celcon. Hostaform and Duracon. The principle of thermal stability in this case is the copolymerisation of formaldehyde with a second monomer which is a cyclic ether of the general form shown in Figure 19.3 (I). 

American Home Products Corporation Hoechst Celanese Corporation Rohm and Haas Company EMC Corporation Occidental Chemical Corporation Arthur D. Little, Inc. 

C. E. Tucker, K. G. Davenport, 1997, Hoechst Celanese Corporation US Patent 5618958. 

Hoechst Celanese Corporation, 13800 South Lakes Drive, Charlotte, NC 28273, USA. 

Separators made by the dry process are available from Hoechst Celanese Corporation and Ube. The Celgard microporous... 

Hoechst. 1988e. Endosulfan - Substance Technical (Code HOE 002671 01ZD97 0003)/ Carcinogenicity study in mice 24 month feeding study. Hoechst Celanese Corporation, Somerville, New Jersey (author HH Donaubauer). TOXN NO. 83.0113 (Volume 1 of 13). April 6,1988. [unpublished study]... 

To minimize damage due to power outage, the Celanese Corporation in their plant at Newark, N.J., instituted a policy of always generating half its own power. Merck Company installed additional auxiliary steam power to insure constant refrigeration for its biochemicals at its West Point, Pa., plant. At Allied Chemical s phenol plant in Frankfort, Pa., electric devices on air compressors and pumps were replaced by steam-operated controls, and diesel generators were installed to maintain cooling water circulation. 19... 

We gratefully acknowledge financial support for the symposium from the following organizations Celanese Corporation, Dow Corning Corporation, ACS Division of Inorganic Chemistry, ACS Division of Polymer Chemistry, Inc., ACS Division of Polymeric Materials Science and... 

Liquicel A liquid-liquid extraction process in which the two liquids are separated by a permeable membrane in the form of hollow plastic fibers. Developed by Hoechst Celanese Corporation. 

Devoe and Raynolds (now a division of the Celanese Corporation) has been making paint in New York since about 1754, the decades prior to our independence. It may have been the oldest corporation in the USA. 

Other US companies chose to await expiration of the Whinfield and Dickson patent before entering the market. One of the earliest to become involved was Celanese Corporation, whose joint venture with ICI, named Fiber Industries Inc. (FII Fortrel), began construction of its first PET plant in 1959. Beaunit (Vycron) was also an early entrant, initially with a copolymer fibre that was arguably not covered by the basic patent, using polymer from Goodyear. 

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