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1.发明授权
公开(公告)号：US3836436A
公开(公告)日：1974-09-17
申请号：US27593772
申请日：1972-07-28
Applicant: SNAM PROGETTI
CPC classification number: C07D301/10 , B01J23/50 , B01J37/348 , C25C5/02 , Y02P20/52
Abstract: A process is disclosed whereby a silver containing catalyst is produced, in a particle size ranging from 300 to 1,500 A, through the pulsed electrolysis of a solution of a silver salt (e.g., silver nitrate) in the presence of a complexing agent (e.g., ammonia) wherein current is fed to the solution for spaced periods of a few seconds duration. Advantageously, after about 10-15 cycles of feeding and interrupting the current to the solution, a current inversion lasting from a few seconds is effected. The silver is obtained in the form of a powder which, after washing, can be used directly or supported on a ceramic material as catalyst for the production of ethylene oxide.
Abstract translation: 公开了一种方法，其中通过在络合剂存在下通过脉冲电解银盐（例如硝酸银）溶液，制备粒度范围为300至1,500的含银催化剂（例如， 氨），其中电流被供给溶液，持续时间为几秒。 有利的是，在供给和中断电流到溶液的约10-15个循环之后，进行持续几秒的电流反转。 银以粉末的形式获得，其在洗涤后可直接使用或负载在陶瓷材料上作为生产环氧乙烷的催化剂。
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公开(公告)号：US3843491A
公开(公告)日：1974-10-22
申请号：US31906072
申请日：1972-12-27
Applicant: SNAM PROGETTI
IPC: B01J23/50 , B01J37/34 , C07D301/10 , C07D303/04 , C25C1/20 , C25C5/00 , C22D5/00 , C22D1/12
CPC classification number: C07D301/10 , B01J23/50 , B01J37/348 , Y02P10/138
Abstract: 1. A PROCESS FOR THE PREPARATION OF SILVER USEFUL AS A CATALYST BY SILVER ELECTROCHEMICAL DEPOSITION COMPRISING: COMPLEXING A SILVER COMPOUND WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF AMMONIC AND FLUOBORIC IONS, ELECTROLYTICALLY DEPOSITING THE SILVER COMPOUND ON A CATHODE, AND CONCURRENTLY REMOVING THE DEPOSITED SILVER FROM SAID CATHODE WHEREBY THE REMOVED SILVER HAS A SIZE OF LESS THAN 1500 A.
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公开(公告)号：KR800000972B1
公开(公告)日：1980-09-17
申请号：KR750000811
申请日：1975-04-17
Applicant: SNAM PROGETTI
IPC: C01F7/56
Abstract: Compds. of formula Al2(OH)2Cly, where X is 1-4 and Y is 5-2, are made by reaction Al2O3 or Al(OH)3 at 160-270≦̸C under pressure with 30-7% HCl in an amt. equiv. to Al2(OH)3Cl3. In an example, Al2O33H2O 50 and 33% HCl 110kg were placed in an autoclave under 0.5 atm. N, heated to 180≦̸C in 30 min, and held there for 4 hr. more, the final pressure being 8 atm. The product was a soln, of Al2(OH)3Cl3 with a density of 1.40 at 20≦̸C contg. 19.5% Al2O3 and 21% C at pH 0.9
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公开(公告)号：YU70175A
公开(公告)日：1982-05-31
申请号：YU70175
申请日：1975-03-20
Applicant: SNAM PROGETTI
Abstract: 1488444 Aluminium chlorohydroxide SNAMPROGETTI SpA 21 March 1975 [28 March 1974] 12043/75 Addition to 1410087 Heading ClA An aluminium chlorohydroxide of formula Al 2 (OH) x Cl y (in which x is 1-4 and y is 5-2) is prepared by reacting hydrochloric acid with an aluminium oxide or hydroxide at a temperature exceeding 160‹ C. but not exceeding 270‹ C., the amount of aluminium compound available for reaction with the hydrochloric acid being at least the stoichiometric amount needed to produce AlCl 3 . Preferably Bayer alumina is used.
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公开(公告)号：IT1048280B
公开(公告)日：1980-11-20
申请号：IT4983574
申请日：1974-03-28
Applicant: SNAM PROGETTI
Abstract: 1488444 Aluminium chlorohydroxide SNAMPROGETTI SpA 21 March 1975 [28 March 1974] 12043/75 Addition to 1410087 Heading ClA An aluminium chlorohydroxide of formula Al 2 (OH) x Cl y (in which x is 1-4 and y is 5-2) is prepared by reacting hydrochloric acid with an aluminium oxide or hydroxide at a temperature exceeding 160‹ C. but not exceeding 270‹ C., the amount of aluminium compound available for reaction with the hydrochloric acid being at least the stoichiometric amount needed to produce AlCl 3 . Preferably Bayer alumina is used.
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Patent Agency Ranking
公开(公告)号：SE407399B
公开(公告)日：1979-03-26
申请号：SE7503641
申请日：1975-03-27
Applicant: SNAM PROGETTI
IPC: C01F7/56
Abstract: 1488444 Aluminium chlorohydroxide SNAMPROGETTI SpA 21 March 1975 [28 March 1974] 12043/75 Addition to 1410087 Heading ClA An aluminium chlorohydroxide of formula Al 2 (OH) x Cl y (in which x is 1-4 and y is 5-2) is prepared by reacting hydrochloric acid with an aluminium oxide or hydroxide at a temperature exceeding 160‹ C. but not exceeding 270‹ C., the amount of aluminium compound available for reaction with the hydrochloric acid being at least the stoichiometric amount needed to produce AlCl 3 . Preferably Bayer alumina is used.
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公开(公告)号：NO135900B
公开(公告)日：1977-03-14
申请号：NO83073
申请日：1973-03-01
Applicant: SNAM PROGETTI
Abstract: A process is described whereby aluminum chlorohydroxide having a controlled chlorine content is prepared by subjecting a mineral containing aluminum oxide or hydroxide (e.g. bayerite, gibbsite, diaspore, boehmite or alumina bayer) is subjected to a preliminary etching with hydrochloric acid at a temperature in the range from 110 DEG to 150 DEG C, the solution so obtained is neutralized with ammonia and the desired aluminum chlorohydroxide (e.g. Al2(OH)5Cl) is crystallized out.
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公开(公告)号：BR7301433D0
公开(公告)日：1974-05-16
申请号：BR143373
申请日：1973-02-26
Applicant: SNAM PROGETTI
IPC: C01F7/56
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10.发明专利
公开(公告)号：ZA731256B
公开(公告)日：1973-11-28
申请号：ZA731256
申请日：1973-02-22
Applicant: SNAM PROGETTI
Abstract: A process is described whereby aluminum chlorohydroxide having a controlled chlorine content is prepared by subjecting a mineral containing aluminum oxide or hydroxide (e.g. bayerite, gibbsite, diaspore, boehmite or alumina bayer) is subjected to a preliminary etching with hydrochloric acid at a temperature in the range from 110 DEG to 150 DEG C, the solution so obtained is neutralized with ammonia and the desired aluminum chlorohydroxide (e.g. Al2(OH)5Cl) is crystallized out.
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