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1. 发明专利

GB658863A Improvements in and relating to the preparation of catalysts 未知
公开(公告)号：GB658863A
公开(公告)日：1951-10-17
申请号：GB375049
申请日：1949-02-10
申请人： PETER WILLIAM REYNOLDS , DENNIS ALBERT DOWDEN , JAMES ALAN MACKENZIE , ICI LTD
IPC分类号： B01J25/00
摘要： A foraminate copper-nickel-aluminium catalyst for the hydrogenation of olefines, diolefines and acetylenes is prepared by treating pieces of a copper-nickel-aluminium alloy containing 40-60 per cent aluminium with aqueous caustic alkali to extract part, preferably not more than 70 per cent, of the aluminium. Extraction temperatures of atmospheric to 100 DEG C. may be employed and the aqueous alkali, e.g. caustic soda, is preferably passed over the pieces of alloy at a space velocity greater than 10. The extracted alloy is finally washed with water. The catalyst may be reactivated by further treatment with aqueous alkali.

2. 发明专利

GB596880A Improvements in and relating to the catalytic hydrogenation of organic compounds 未知
公开(公告)号：GB596880A
公开(公告)日：1948-01-13
申请号：GB1472145
申请日：1945-06-11
申请人： JOHN GEORGE MACKAY BREMNER , FREDERICK STARKEY , DENNIS ALBERT DOWDEN , ICI LTD
IPC分类号： C07D307/06 , C07D307/36
摘要： The catalytic hydrogenation of furyl compounds having one or more reducible side chains (in which the reducible groups are ethylenic or acetylenic) is carried out in the presence of ammonia or an amine, in order to suppress hydrogenation of the furyl nucleus. Diethylamine, triethylamine, aniline, furfurylamine and tetrahydrofurfurylamine are suitable amines. Temperatures of 50-120 DEG C. or higher and a pressure of 50 atmospheres may be employed. The catalyst may be porous nickel, or nickel or cobalt supported on kieselguhr. Examples describe the hydrogenation of vinyl furan to ethyl furan.

3. 发明专利

GB576087A Improvements in and relating to the production of 1:5 pentanediol 未知
公开(公告)号：GB576087A
公开(公告)日：1946-03-19
申请号：GB570442
申请日：1942-04-28
申请人： JOHN GEORGE MACKAY BREMNER , ROBERT HOLROYD STANLEY , ARTHUR WILLIAM CHARLES TAYLOR , DENNIS ALBERT DOWDEN , ICI LTD
IPC分类号： C07C31/18 , H05B6/46
摘要： 1 : 5-Pentanediol is prepared by treating d -hydroxyvaleric aldehyde or its isomer 1 : 5-epoxy pentanol-5 with hydrogen at elevated temperatures and/or pressures in the presence of a hydrogenating catalyst. The reaction may be carried out in the liquid phase and in the presence of water. Suitable catalysts are the metals of group VIII or copper which may be supported on an inert carrier. In the examples, hydrogen, d -hydroxyvaleric aldehyde and a nickel on kieselguhr catalyst are reacted together (1) in the absence of water, (2) with water, to give 1 : 5-pentanediol, with some dihydropyran. d -Hydroxyvaleric aldehyde is prepared by hydrating dihydropyran in the presence of a mineral acid.

4. 发明专利

GB688207A Improvements in and relating to organic hydroxy compounds 未知
公开(公告)号：GB688207A
公开(公告)日：1953-03-04
申请号：GB1731249
申请日：1949-06-30
申请人： FRANCIS RICHARD CHARLTON , DENNIS ALBERT DOWDEN , ICI LTD
IPC分类号： B01J23/02 , C07C45/72 , C07C49/17
摘要： 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)]

5. 发明授权

US3986985A Catalysts for hydrogenation 失效
标题翻译：催化剂用于氢化
公开(公告)号：US3986985A
公开(公告)日：1976-10-19
申请号：US480274
申请日：1974-06-17
申请人： Thomas Gordon Dewdney , Dennis Albert Dowden , Wyndham Morris
发明人： Thomas Gordon Dewdney , Dennis Albert Dowden , Wyndham Morris
IPC分类号： B01J23/745 , B01J37/08 , B01J37/18 , B01J23/74
CPC分类号： B01J23/745 , B01J37/08 , B01J37/18
摘要： A fused and solidified iron oxide catalyst containing at least 96.5% of iron oxide having an atomic ratio of oxygen to iron of 1.2:1 to 1.4:1 is activated by heating in hydrogen and used for the hydrogenation of organic compounds especially of adiponitrile to hexamethylene diamine.

6. 发明授权

US4064172A Hexamethylene diamine by hydrogenation of adiponitrile in presence of an activated iron oxide catalyst 失效
标题翻译：在活化的氧化铁催化剂的存在下，通过己二腈氢化制得六亚甲基二胺
公开(公告)号：US4064172A
公开(公告)日：1977-12-20
申请号：US711372
申请日：1976-08-03
申请人： Thomas Gordon Dewdney , Dennis Albert Dowden , Wyndham Morris
发明人： Thomas Gordon Dewdney , Dennis Albert Dowden , Wyndham Morris
IPC分类号： B01J23/745 , B01J37/08 , B01J37/18 , C07C85/12
CPC分类号： B01J37/08 , B01J23/745 , B01J37/18
摘要： Adiponitrile is hydrogenated to hexamethylene diamine in the presence of a fused and solidified iron oxide catalyst containing at least 96.5% of iron oxide, having an atomic ratio of oxygen to iron of 1.2:1 to 1.4:1, previously activated by heating in hydrogen.
摘要翻译：在熔融和固化的氧化铁催化剂存在下，将己二腈氢化成己二胺，该催化剂含有至少96.5％的氧化铁，其氧原子比为1.2:1至1.4:1，预先通过在氢中加热而活化。

7. 发明授权

US4005048A Treating hydrocarbons 失效
标题翻译：处理碳氢化合物
公开(公告)号：US4005048A
公开(公告)日：1977-01-25
申请号：US467800
申请日：1974-05-07
申请人： Dennis Albert Dowden , Ian Robertson Shannon , Michael Staines Spencer
发明人： Dennis Albert Dowden , Ian Robertson Shannon , Michael Staines Spencer
IPC分类号： B01J21/06 , B01J23/02 , B01J23/10 , B01J37/03 , C07C5/27 , C07C3/58 , C07C5/24
CPC分类号： B01J21/066 , B01J23/02 , B01J23/10 , B01J37/03 , C07C5/2735 , C07C2521/06 , Y02P20/52
摘要： Hydrocarbon catalytic reactions (including isomerization, cyclization, aromatization, disproportionation, alkylation, de-alkylation, reforming, hydrcracking) are effected over a catalyst comprising a crystalline solid solution of two or more irreducible compounds differing in the valency of their cations and/or their anions. The catalysts may be made by heating together the components of the crystalline solid solution or compounds thermally decomposable thereto. Some of the catalysts contain one or more additional acidic materials which act as co-catalysts, and are new compositions of matter.
摘要翻译：烃催化反应（包括异构化，环化，芳构化，歧化，烷基化，脱烷基化，重整，氢化裂解）在包含两种或更多种不可降解化合物的结晶固溶体的催化剂上进行，所述化合物的阳离子的化合价和/ 阴离子催化剂可以通过将结晶固溶体的组分或可热分解的化合物加热在一起来制备。一些催化剂含有一种或多种作为助催化剂的附加酸性物质，并且是物质的新组合物。

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