Patent GB-1235724-A (GB)
Title: Process for manufacturing a catalyst, resulting catalyst and process for manufacture of benzaldehyde from toluene in the presence of said catalyst
Inventor: DELMON BERNARD
IPC: C07C51/265
Filed: 1968-09-13
Abstract: 1,235,724. Oxidation catalysts. INSTITUT FRANCAIS DU PETROLE DES CARBURANTS ET LUBRIFIANTS. 13 Sept., 1968 [13 Sept., 1967], No. 43754/68. Heading B1E. [Also in Division C2] A catalyst composition is prepared by (i) forming, in the presence of sulphuric acid, a mixture of at least one compound of uranium, at least one compound of molybdenum, optionally a compound of a metal selected from Groups Ia and IIa, for example lithium, sodium, potassium, rubidium, magnesium, calcium, strontium or barium, and optionally a compound of an additional metal selected from chromium, tungsten, copper, silver, yttrium, cerium or other rare earth metal or metals, (ii) drying the mixture and (iii) calcining the dried mixture at a temperature preferably of between 400‹C and 800‹C, for example 600‹C. The mixture may be prepared either in the absence of a solvent and thereafter dried and calcined or, preferably in the presence of ammonia and/or citric acid, in the form of a solution which is evaporated to give a solid mixture which is calcined; the calcined mixture may be mixed with a binding agent, either alone or in combination with carrier material, and the resulting mixture extruded and, if desired, calcined. Alternatively, the mixture may be deposited from a solution thereof on to carrier material, the resulting mixture being dried and calcined. The carrier material may be alumina, silica, magnesia, zirconia or, preferably, silicon carbide. Calcining, which may remove part or all of the sulphuric acid from the mixture, provides a composition which preferably contains from 20 to 95 per cent by weight of uranium oxide expressed as UO 3 , from 4 to 70 per cent by weight of molybdenum oxide expressed as MoO 3 , optionally from 0.1 to 5 per cent by weight of a metal selected from Groups Ia and IIa as identified supra, expressed in terms of the corresponding oxide, and optionally from 0.01 to 20 per cent by weight of additional metal or metals as identified supra, expressed in terms of the corresponding oxide or oxides, and which may be used as catalyst in the gas phase oxidation of toluene to benzaldehyde (see Division C2). 1,235,726. Controlling peptide synthesis. DANISH INSTITUTE OF PROTEIN CHEMISTRY. 17 Sept., 1968 [18 Sept., 1967], No. 44160/68. Heading B1X. [Also in Division B8] A reaction system for use for example in the solid state synthesis of peptides comprises a plurality of first vessels 111a-111c for reagents, a second vessel 112 which may be a metering vessel, a plurality of conduits 115a-- 115c free of valves and each connecting one first vessel to the second vessel, and an automatic control system for controlling the flow of reagents from the first vessels to the second vessel by sequentially selectively applying to the reagents in the first vessels 111a &c by means of gas pressure in lines 122, 116a &c a first pressure which is higher than the pressure in the second vessel 112 so that reagent flows into the second vessel, and a second pressure which is lower than the pressure in the second vessel so that reagent ceases to flow to the second vessel and flows back from the conduits to the first vessels, by siphon action when the second pressure is atmospheric pressure or by applying vacuum as the second pressure. In the embodiment shown reagent passes to metering vessel 112 until the liquid level in side-arm 131 reaches photocell 134 or 135, when reagent flow ceases. Solenoid valve 133 is operated to allow the reagent to flow to reaction vessel 113; completion of flow is signalled by photocell 140. Shaker 144 is operated to mix the reactants. Solenoid valve 147 is then opened to allow the liquid to be filtered through disc 145 into waste flask 114. The second reagent is then passed into the reaction vessel. The reaction system is under the control of unit 154 with tape reader 155.