Organic compounds -- part of the class 532-570 series – Organic compounds – Aluminum containing
Patent
1990-03-20
1992-02-11
Dees, Jose G.
Organic compounds -- part of the class 532-570 series
Organic compounds
Aluminum containing
556175, 556178, 556187, C07F 506
Patent
active
050877135
DESCRIPTION:
BRIEF SUMMARY
Aluminum oxanes are formed during the controlled reaction of aluminum alkyls with water. A typical characteristic is the linking of two aluminum atoms which still carry organic groups through an oxygen atom. The first representative of the aluminum oxanes is oxo-bis-dialkylaluminum or tetraalkyldialuminum oxide. Its isolation and characterization, particularly with methyl as the alkyl group, are not known to this day.
As a rule, the reaction between water and aluminum alkyls results in complete hydrolysis, in other words, in the formation of aluminum oxide, often with violent reaction and even flame formation.
A number of different methods have been developed for the cautious, controlled and incomplete reaction between water and aluminum alkyls. They have been published by (1) E. J. Vandenberg, J. Pol. Sci. 47 (1960) 485; (2) N. N. Korneev, A. F. Popov, E. J. Larikov, A. F. Zhigach and G. B. Sakharovskaya, J. Gen. Chem. USSR 34 (1964) 3425; (3) A. Storr, K. Jones and A. W. Laubengayer, J. Amer. Chem. Soc. 90 (1968) 3173; (4) G. B. Sakharovskaya, N. N. Korneev, A. F. Popov, S. Z. Snegova, A. F. Zhigach and M. V. Sobolewskii, Brit. 1, 319, 746 (Ch. CO8g) June 6, 1973, Appl. 6621/71, March 11, 1971; (5) M. Aoyagi, T. Vada, Y. Tadokoro and S. Horikivi, Jpn. Kokai Tokkyo Kono 79, 64, 600 (Cl. CO8g 79/10) May 24, 1979, Appl. 77/131,909 Nov. 1, 1977: (6) J. Herwig, Dissertation, Hamburg University (1979); (7) H. J. Vollmer, Dissertation, Hamburg University (1980); (8) A. Wolinska, J. Organomet. Chem. 234 (1982) 1; and M. Boleslawski and J. Serwatowski, J. Organomet. Chem. 254 (1983) 159.
These methods bring the water and the aluminum alkyls into direct contact with each other. They are intended for the preparation of small quantities for catalytic investigations. The methods of preparation differ with respect to the carrier for the water. Vandenberg (1) reacts aluminum alkyls and water without a carrier. Sakharovskaya et al. (4) use a N.sub.2 stream as entrainer for the water required for the reaction. In Hamburg the molecular-sieve method (6), (7) was developed. In this method, a molecular sieve loaded with water serves as carrier or source of water.
The direct method poses the risk of a slight "running away" of the reaction. The water, introduced into the reactor by means of a carrier, is bound to the latter only physically and therefore readily released, which renders a controlled reaction difficult.
When the water required for the partial hydrolysis of aluminum alkyls is introduced chemically combined in the form of salt hydrates, slow liberation of the water of crystallization, and hence a quiet reaction, are assured. This reasoning has led to the water-of-crystallization method, published by (10) G. A. Razuvajev, J. A. Sangolov, J. J. Nelkenbaum and K. S. Minsker, Jzw. Akad. Navk. SSR, Ser.Chim. 19 (1975) 2547; (11) H. Hahnsen, Thesis, Hamburg University (1980); and (12) S. R. Rafikov, K. S. Minsker, J. A. Sangalov and J. J. Nelkenbaum, USSR Patent 566,844, C. A. 87 (1977) 152373h.
Further methods of preparation are designed to obtain the Al-O-Al linkage through appropriate choice of organoaluminum compounds such as dialkylaluminum chloride and lithiumdialkyl aluminate, alkoxyaluminum dichloride or methylmethoxyaluminum chloride, and methylaluminum chloride or ethylaluminum chloride. These methods have been published by (13) H. Tani, T. Araki, N. Oguni, T. Aoyoagi and N. Ueyama, J. Pol. Sci. Po. Lett. (8) 4 (1966) 97; (14) H. Tani, T. Araki, N. Ogunbi, T. Aoyoagi and N. Ueyama, J. Amer. Chem. Soc. 89 (1967) 173; (15) N. Ueyama, T. Araki and H. Tani, Inorg. Chem. 12 (1973) 2218; (16) W. Kosinska, K. Zardecka, A. Kunicki, M. Boleslawski and S. Pasynkiewicz, J. Organomet. Chem. 153 (1978) 281; and (17) W. Kosinska, A. Kunicke, M. Boleslawski and S. Pasynkiwicz, J. Organomet. Chem. 161 (1978) 289.
Aluminum oxanes can also be prepared by reacting aluminum trialkyls with PbO, as described by (18) M. Boleslawski and S. Pasynkiewicz, J. Organomet. Chem. 43 (1972) 81.
Lastly, the water-of crystallization method was
REFERENCES:
patent: 4730071 (1988-03-01), Schoenthal et al.
patent: 4730072 (1988-03-01), Schoenthal et al.
Boleslawski et al., J. Organomet. Chem. 1983, 255(3), 269-78 (Chem. Abs. 100:13918ZN).
Clausnitzer Dieter
Sinn Hansjoerg
Winter Hergen
Dees Jos,e G.
Nazario Porfirio
Schering AG
LandOfFree
Process for producing aluminum oxanes, in particular methylalumi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for producing aluminum oxanes, in particular methylalumi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing aluminum oxanes, in particular methylalumi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-782577