Gmelins handbuch der anorganischen chemie. Georg Brauer-Handbuch der Prparativen Anorganischen. Tech-niken" aus den Beschreibungen der.
US3576762A - Catalysts of modified basic trivalent metal acetates - Google Patents Connect public, paid and private patent data with Catalysts of modified basic trivalent metal acetates Info Publication number US3576762A US3576762A US3576762DA US3576762A US 3576762 A US3576762 A US 3576762A US 3576762D A US3576762D A US 3576762DA US 3576762 A US3576762 A US 3576762A Authority US Grant status Grant Patent type Prior art keywords example catalyst process polymer water Prior art date 1965-02-19 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number Inventor Francoise Maguet-Martin Maseh Osgan Philippe Teyssie Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) IFP Energies Nouvelles Original Assignee IFP Energies Nouvelles Priority date (The priority date is an assumption and is not a legal conclusion. THERE ARE PROVIDED POLYMERIZATION CATALYSTS ESPECIALLY USEFUL FOR THE POLYMERIZATION OF CYCLIC ETHERS. THESE CATALYSTS HAVE THE FORMULA M6+2NO7+3N(OH)2A2 WHEREIN A IS A CARBOXYLIC ACID MONOVALENT RADICAL, M IS A TRIVALENT METAL AND N IS A NUMBER COMPRISED BETWEEN 0 AND 10. THESE CATALYSTS ARE PRODUCED BY HYDROLYZING A BASIC TRIVALENT METAL CARBOXYLATE, E.G.
BASIC IRON (III) ACETATE, AND THEN DEHYDRATING THE RESULTANT HYDROLYZED CARBOXYLATE. ALUMINUM ALCOHOLATE OR PHENATE MAY BE ADDED THERETO. Marshall Vintage Modern 2266 Manual High School. United States Patent Olfice 3,576,762 Patented Apr. 27, 1971 Int.
Cos 23/14 US. 252431 16 Claims ABSTRACT OF THE DISCLOSURE There are provided polymerization catalysts especially useful for the polymerization of cyclic ethers. Byron Sharp How Brands Grow Pdf Printer. These catalysts have the formula M O,,(OH) A wherein A is a carboxylic acid monovalent radical, M is a trivalent metal and n is a number comprised between and 10. These catalysts are produced by hydrolyzing a basic trivalent metal carboxylate, e.g. Basic iron (III) acetate, and then dehydrating the resultant hydrolyzed carboxylate.
Aluminum alcoholate or phenate may be added thereto. This application is a division of application Ser. 527,078, filed Feb. 14, 1966, and now Pat. 3,427,260 issued Feb. This invention relates to new polymerization catalysts and to a process for polymerizing alkylene oxides by means of these catalysts.
More particularly the invention relates to the manufacture of polymerization catalysts from trivalent metal carboxylates and preferably also from an aluminium alcoholate. It is known that some trivalent metal carboxylates such as technical basic iron acetate may be used as catalysts in the polymerization of propylene oxide as described in Example of US.
However with such catalysts, the reaction rate is extremely low, being 264 hours in said example. One object of this invention is to provide a process for polymerizing alkylene oxides at a high rate. Another object is to provide such a process wherein a high yield of polymer is obtained. One further object is to provide such a process wherein a polymer of high intrinsic viscosity is obtained. One further object is to provide a new catalyst for this process.
These and other objects as will be apparent from the following description and claims are obtained when there is used as catalyst a hydrolyzed and then dehydrated basic trivalent metal carboxylate. Trivalent transition metal carboxylates which are advantageously employed in the preparation of catalytic compositions are trinuclear metal carboxylates as described in Gmelins Handbuch der anorganischen Chemie, 8th edition, 52nd volume, p. 389, 58th volume, p. 704 and 59th volume, pp.