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    • 6. 发明公开
    • Display devices
    • 显示设备
    • EP0755555A1
    • 1997-01-29
    • EP94904091.0
    • 1994-01-04
    • Forrest, Francis Richard
    • Forrest, Francis Richard
    • G09F9
    • G09F9/37G09F9/30
    • The sign consisting of a board (10) which may be of Corflute or similar material having die cut therefrom at required position components (11) which can be inverted, the two sides of the board (10) being of different colours. The arrangement being such that when the components (11) are inverted, they can display a numeral letter or the like. The components can be rotatable with respect to the board (10) by means of rods (15) which extend downwardly through passage ways in the board and the component. The invention also describes a sign in which a strip member can pass through slits in the body so that particular material thereon can be seen when examining the body.
    • 该标牌由可以是Corflute或类似材料的板(10)组成,该板可以在需要的位置上被倒转,板(10)的两侧具有不同的颜色。 当部件(11)翻转时,它们可以显示数字字母等。 部件可以借助于杆(15)相对于板(10)旋转,杆(15)向下延伸穿过板和部件中的通道。 本发明还描述了一种标牌,其中带状部件可以穿过身体中的狭缝,从而在检查身体时可以看到其上的特定材料。
    • 10. 发明专利
    • Improvements in and relating to organic hydroxy compounds
    • GB688207A
    • 1953-03-04
    • GB1731249
    • 1949-06-30
    • FRANCIS RICHARD CHARLTONDENNIS ALBERT DOWDENICI LTD
    • B01J23/02C07C45/72C07C49/17
    • A process for the production of aldol condensation products comprises bringing an aliphatic carbonyl compound into contact in the liquid phase at a temperature not in excess of 30 DEG C. with a catalyst comprising calcium oxide or calcium hydroxide supported on a lithia-alumina complex prepared by heating a mixture of g -alumina or a form of alumina which yields g -alumina on heating and lithia or a lithium compound decomposable to lithia on heating to a temperature in excess of 600 DEG C., the g -alumina referred to being obtained by precipitation, e.g. of the species boehmite or hydrargillite from soluble aluminium compounds, e.g. by alkali and calcination at 400 DEG to 600 DEG C. Starting materials mentioned are methyl ethyl, methyl propyl and methyl isopropyl ketones which yield respectively 3 - methylheptan - 3 - ol - 5 - one and 3,4 - dimethylhexan - 3 - ol - 5 - one; 4-methylnonan - 4 - ol - 6 - one and 4 - methyl-5 - ethylheptan - 4 - ol - 6 - one and 2,3,6-trimethylheptan - 3 - ol - 5 - one and 2,3,4,4-tetramethylhexan - 3 - ol - 5 - one. The liquid carbonyl compound may be passed through one or more beds of catalyst in a temperature controlled reactor and the process may be operated batchwise or continuously. The lithia-alumina complex may be prepared by impregnating the g -alumina with a solution of a lithium salt decomposable to lithia on heating and igniting the product at a temperature in excess of 600 DEG C. The catalyst may be prepared by washing the lithia-alumina complex, crushing the granules and impregnating the latter with a soluble calcium compound capable of thermal decomposition to the oxide and heating the impregnated granules to yield the oxide. Typically, nitric acid washed g -alumina is ignited and after soaking in lithium nitrate solution is again ignited. The product is washed, steeped in molten calcium nitrate and heated to decompose the nitrate. The catalysts may be reactivated by calcining and largely restored by further damping and heating. In an example acetone is passed over catalysts both fresh and reactivated, prepared as described above and converted to diacetone alcohol.ALSO:A catalyst comprises calcium oxide or calcium hydroxide supported on a lithiaalumina complex prepared by heating to a temperature above 600 DEG C a mixture of g -alumina or a form of alumina which yields g -alumina on heating and lithia or a lithium compound decomposable to lithia on heating. The g -alumina referred to is obtained by precipitation, bechmite or hydrargillite from soluble aluminium compounds e.g. by alkali and calcination thereof at 400 DEG to 600 DEG C. In the preparation of a typical catalyst nitric acid washed g -alumina is ignited and after soaking in lithium nitrate solution is again ignited at 950 DEG C. The product is washed, steeped in molten calcium nitrate and heated to decompose the nitrate. The catalysts may be reactivated by calcining and largely restored by further damping and heating. The catalysts may be employed in the production of aldol condensation products by bringing an aliphatic carbonyl compound in contact therein in its liquid phase at temperature, not in excess of 30 DEG C, [see Group IV(b)]