Proabd process

Figure 7.8 The Proabd process. (Reproduced with permission of Rittner and Steiner 1985.)...

Ab der-Halden A continuous process for distilling coal tar. It is operated under reduced pressure with the heat provided by five, superheated steam. This provides a clean separation of the products, without cracking. Developed in France in the 1920s by C. Ab der-Halden who formed the company PROABD to exploit it. PROABD is now a division of BEFS Technologies, Mulhouse, France, which offers this process and others under the same trade name. Not to be confused with the Abderhalden reaction in biochemistry. 

PROABD A crystallization process developed by BEFS PROKEM, France. In 1994, more than 80 plants were using PROABD distillation and crystallization processes. See Ab der-Halden. 

PROABD MSC [melt static crystallization] A process for purifying /r-xylene by crystallization. Used in conjunction with MSTDP. Piloted in France from 1994 to 1996 and proposed for installation in India in 1997 and in Bulgaria in 1998. 

Societe Proabd (1959) Process and apparatus for refining crude naphthalene. British Patent 837295 [see also British Patent 899799 1961 (benzene)]. 

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