公开(公告)号：US4024074A

公开(公告)日：1977-05-17

申请号：US664199

申请日：1976-03-05

申请人： Luciano Cairati ,  Ferruccio Trifiro' ,  Pierluigi Villa

发明人： Luciano Cairati ,  Ferruccio Trifiro' ,  Pierluigi Villa

IPC分类号： C07C47/052 ,  B01J23/88 ,  B01J23/887 ,  B01J37/03 ,  C07B61/00 ,  C07C45/00 ,  C07C45/38 ,  C07C67/00

CPC分类号： B01J37/03 ,  B01J23/8876 ,  C07C45/38 ,  B01J2523/00

摘要： A catalyst active and selective in the oxidation of methanol to formaldehyde is prepared by mixing an aqueous molybdate solution with an aqueous solution of a ferric salt, while maintaining a Mo/Fe atomic ratio of from 1.6:1 to 2.2:1 in the mixture, heating the resulting suspension at 70.degree.-100.degree. C for at least 30 minutes, washing the resulting precipitate with water, drying said precipitate to reduce its water content to 2-8% by weight, reducing the dried precipitate to granules and drying the latter to completely remove water, impregnating the dried granules with an aqueous solution of a decomposable bismuth salt and drying and calcining the impregnated granules. The catalyst consists of granules of crystalline iron molybdate and molybdenum trioxide having on their surface an interaction product thereof with bismuth oxide, said molybdenum trioxide and said bismuth being present in an amount of 5-35 wt.% and 0.5-10 wt.%, respectively, with respect to the crystalline iron molybdate.

摘要翻译： 通过将钼酸水溶液与铁盐水溶液混合，同时保持混合物中的Mo / Fe原子比为1.6:1至2.2:1，制备了将甲醇氧化成甲醛的活性和选择性的催化剂， 将所得悬浮液在70℃-100℃加热至少30分钟，用水洗涤所得沉淀物，干燥所述沉淀物以将其水含量降低至2-8重量％，将干燥的沉淀物还原成颗粒并干燥后者 完全除去水，用可分解的铋盐水溶液浸渍干燥的颗粒，并干燥并煅烧浸渍的颗粒。 催化剂由结晶钼酸钼和三氧化钼的颗粒组成，其表面上与氧化铋的相互作用产物，所述三氧化钼和所述铋以5-35重量％和0.5-10重量％的量存在， 分别相对于结晶的钼酸铁。

公开(公告)号：US3983073A

公开(公告)日：1976-09-28

申请号：US594891

申请日：1975-07-10

申请人： Ferruccio Trifiro ,  Pierluigi Villa ,  Luciano Cairati

发明人： Ferruccio Trifiro ,  Pierluigi Villa ,  Luciano Cairati

IPC分类号： B01J23/88 ,  B01J23/881 ,  C07B61/00 ,  C07C45/00 ,  C07C45/38 ,  C07C47/052 ,  C07C67/00

CPC分类号： B01J23/881 ,  C07C45/38

摘要： A catalyst active in the oxidation of methanol to formaldehyde is prepared by forming a suspension of an amorphous precipitate by mixing an aqueous molybdate solution with an aqueous solution of a ferric salt, while maintaining an atomic ratio Mo/Fe of at least 1.5:1 in the mixture, heating the suspension at 70.degree.-100.degree.C for at least 30 minutes, washing the resulting precipitate with water to remove the soluble salts and at least a part of the excess of soluble molybdate not transformed into iron molybdate, thereby to ensure in the washed solid an atomic ratio Mo/Fe of from 1.5:1 to 1.7:1, and drying the washed solid at a temperature not exceeding 120.degree.C for a period of at least 30 minutes.The catalyst consists of iron molybdate Fe.sub.2 (MoO.sub.4).sub.3 with an amount of free molybdenum trioxide ranging from zero to a value such that the atomic ratio Mo/Fe is from 1.5:1 to 1.7:1, and has a crystallinity degree of at least 90%.

摘要翻译： 通过将钼酸盐水溶液与铁盐水溶液混合，同时保持至少1.5:1的原子比Mo / Fe，形成无定形沉淀物的悬浮液，从而制备甲醇氧化成甲醛的催化剂。 混合物，将悬浮液在70℃-100℃下加热至少30分钟，用水洗涤所得沉淀物以除去可溶性盐和至少一部分未转化成钼酸铁的可溶性钼酸盐，从而确保 在洗涤固体中，原子比Mo / Fe为1.5:1至1.7:1，并将洗涤的固体在不超过120℃的温度下干燥至少30分钟。

公开(公告)号：US4181629A

公开(公告)日：1980-01-01

申请号：US916691

申请日：1978-06-19

申请人： Luciano Cairati ,  Lucio di Fiore

发明人： Luciano Cairati ,  Lucio di Fiore

IPC分类号： B01J23/881 ,  C07C45/38 ,  B01J21/04 ,  B01J21/08 ,  B01J23/88

CPC分类号： B01J23/881 ,  C07C45/38 ,  B01J2523/00 ,  Y10S502/512 ,  Y10S502/52

摘要： Catalyst for the oxidation of methanol to formaldehyde usable in the fluidized form in said oxidation, comprising iron and molybdenum oxides on a granular support, said support being a silica or an alumina having a specific surface area not exceeding 1 m.sup.2 /g and an overall pore volume not exceeding 0.2 ml/g and said oxides being present in the catalyst in an amount not exceeding 2 parts by weight for each 100 parts by weight of the support and in an atomic ratio between molybdenum and iron of from 1.5:1 to about 2.5:1.

摘要翻译： 在所述氧化中将甲醇氧化成甲醛可用于流化形式的催化剂，其包含粒状载体上的铁和钼的氧化物，所述载体是比表面积不超过1m 2 / g的二氧化硅或氧化铝， 体积不超过0.2ml / g，并且所述氧化物以每100重量份的载体不超过2重量份的量存在于催化剂中，钼和铁之间的原子比为1.5:1至约2.5 ：1。