Industrial Rhone-Poulenc

Great Western Inorganics Mil-Spec Industries Rhone-Poulenc Unisource India (India)... 

Houde, M. (1993) Silicone Sealants in the Building Industry, Rhone-Poulenc, Lyon. 

ICI Surfactants Kenrich Petrochemicals Myoshi Oil Fats Co. PPG Industries Rhone Poulenc Chemical Ltd Rohm Haas RTP Co. 

The DADC monomer is available from several manufacturers, such as PPG Industries (CR-39 ), Akzo (Nouryset 200), Enichem (RAV) Rhone-Poulenc (XR-80), Tokuyama Soda (TS-16), and Mitsui Toatsu (MR-3). 

There are relatively few producers of boric acid esters ia the United States. Eight domestic producers of these compounds (28) are Anderson Development Co., Akzo America, Inc., E. I. du Pont de Nemours Co., Inc., Eagle-Picher Industries, Inc., The Gas Elux Co., Morton International, Callery Chemical Co., and U.S. Borax Chemical Corp. In addition, Rhone-Poulenc Chemicals, Manchester, UK, produces commercial quantities of selected boric acid esters. 

I.N.D.I.A. Industrie Chemiche (Italy) Rhone-Poulenc Jardin (France)... 

Rhone-Poulenc Rare Earth (France) Shaoguan Huali Industrial (China)... 

Jenck, J., Fr. Patent 2,478,078 to Rhone-Poulenc Industries (03-12-1980) Kuntz, E., Fr. Patent 2,349,562 to Rhone-Poulenc Industries (04-29-... 

Cobalt carbonyls are the oldest catalysts for hydroformylation and they have been used in industry for many years. They are used either as unmodified carbonyls, or modified with alkylphosphines (Shell process). For propene hydroformylation, they have been replaced by rhodium (Union Carbide, Mitsubishi, Ruhrchemie-Rhone Poulenc). For higher alkenes, cobalt is still the catalyst of choice. Internal alkenes can be used as the substrate as cobalt has a propensity for causing isomerization under a pressure of CO and high preference for the formation of linear aldehydes. Recently a new process was introduced for the hydroformylation of ethene oxide using a cobalt catalyst modified with a diphosphine. In the following we will focus on relevant complexes that have been identified and recently reported reactions of interest. 

Biphasic techniques for recovery and recycle are among the recent improvements of homogeneous catalysis - and they are the only developments which have been recently and successfully applied in the chemical industry. They are specially introduced into the hydroformylation (or "oxo") reaction, where they form a fourth generation of oxo processes (Figure 5.1 [1]). They are established as the "Ruhrchemie/Rhone-Poulenc process" (RCH/RP) [2] cf. also Section 5.2.4.1), with annual production rates of approximately 800,000 tonnes y"1 (tpy). 

The synthesis of aldehydes via hydroformylation of alkenes is an important industrial process used to produce in the region of 6 million tonnes a year of aldehydes. These compounds are used as intermediates in the manufacture of plasticizers, soaps, detergents and pharmaceutical products [7], While the majority of aldehydes prepared from alkene hydroformylation are done so in organic solvents, some research in 1975 showed that rhodium complexes with sulfonated phosphine ligands immobilized in water were able to hydroformylate propene with virtually complete retention of rhodium in the aqueous phase [8], Since catalyst loss is a major problem in the production of bulk chemicals of this nature, the process was scaled up, culminating in the Ruhrchemie-Rhone-Poulenc process for hydroformylation of propene, initially on a 120000 tonne per year scale [9], The development of this biphasic process represents one of the major transitions since the discovery of the hydroformylation reaction. The key transitions in this field include [10] ... 

In 1975 Kuntz has described that the complexes formed from various rhodium-containing precursors and the sulfonated phosphines, TPPDS (2) or TPPTS (3) were active catalysts of hydroformylafion of propene and 1-hexene [15,33] in aqueous/organic biphasic systems with virtually complete retention of rhodium in the aqueous phase. The development of this fundamental discovery into a large scale industrial operation, known these days as the Ruhrchemie-Rhone Poulenc (RCH-RP) process for hydroformylation of propene, demanded intensive research efforts [21,28]. Tire final result of these is characterized by the data in Table 4.2 in comparison with cobalt- or rhodium-catalyzed processes taking place in homogeneous organic phases. 

The same base material has been used by Rhone-Poulenc Industries to develop Ion-exchange membranes for desalination (21-25). Their research has concentrated on polymers of moderate D.S. and low molecular weight (a restriction imposed by their technique of sulfonatlon which may cause polymer degradation). While their method of membrane preparation Is not entirely clear, it Is evident that the Rhone-Poulenc membranes possess the desired structural asymmetry. In this form the SPSF membranes have proven to be equal to, and In some ways superior to, CA membranes. 

Europe Treibacher Chemische Werke in Austria (1,000 tpa), Th. Goldschmidt AG in West Germany (1,000 tpa), Ronson-British Flint in the United Kingdom (1 0 tpa) and Rhone Poulenc-Pechiney in Prance (250 tpa), most of these facilities working at much less than 0 capacity because of substitution since the mid-seventies in the steel industry. 

The ion exchange method previously described with resin columns has been completely abandoned by Rhone-Poulenc for industrial scale production of the individual rare earth elements. We still use it however in our laboratories and for... 

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