Rhone-poulenc Chimie

Procatalyse S.a.

Bernard Taxil

Thierry Chopin

Christophe Nedez

Patrick Fourre

Philippe Jaeger

Jean-Luc Le Loarer

Method for regenerating anthraquinone derivatives during a synthesis

The invention relates to a process for the adsorption of chelated organometallic compounds, in which the said compounds are placed in contact with alumina-based beads produced by forming by agglomeration of an alumina powder using a rotational technique and exhibiting a volume of pores of diameter greater than 100 .ANG. of at least 0.10 cm.sup.3 /g, a volume of pores of diameter greater than 1 .mu.m of at least 0.05 cm.sup.3 /g and a diameter of not more than 4 mm. It also relates to alumina beads including a chelated organometallic compound.

Process for the adsorption of chelated organometallic compounds and

Activated alumina agglomerates having a crush resistance of at least 12 daN, measured on that fraction thereof having a mean diameter ranging from 3 to 4 mm, and an adsorptive capacity greater than 18% by weight, well adopted as adsorbents in a wide variety of purification processes, are prepared by agglomerating activated alumina particulates, maturing the resulting agglomerates in the presence of a complexing agent for the cation Al.sup.3+, and then thermally treating the matured agglomerates at a temperature ranging from about 100.degree. to 500.degree. C.

Crush resistant adsorptive agglomerates of activated alumina

Crush-resistant/adsorptive agglomerates of activated alumina

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Vif, France

Bernard Taxil