公开(公告)号：DE2950205C2

公开(公告)日：1982-06-24

申请号：DE2950205

申请日：1979-12-13

Applicant: SNAMPROGETTI S.P.A., MILANO, IT

Inventor： LAGANA', VINCENZO ,  PASERO, RICCARDO, MILANO, IT

IPC: B01D1/22 ,  B01D1/06 ,  B01J4/00 ,  F28D3/02 ,  F28D3/04 ,  F28F9/22 ,  B01D53/18 ,  B01D3/32

Abstract: This invention relates to an apparatus for distributing liquid in the form of film within vertical tubes. The apparatus is constituted by a solid cylindrical member inserted as a plug into each tube at the upper end thereof. Said member is provided with an upper ledge, a lower cavity forming a circular rim at its base, and helical outer grooves extending also in the ledge and having a depth less than the thickness of said rim.

公开(公告)号：ES2033418T3

公开(公告)日：1993-03-16

申请号：ES88201522

申请日：1988-07-15

Applicant: SNAMPROGETTI S.P.A.

Inventor： LAGANA', VINCENZO ,  FARNETI, ANGIOLO ,  BASSETTI, ANGELO

IPC: C02F3/04 ,  C02F3/06 ,  C02F3/28 ,  C02F3/30 ,  C02F3/34

Abstract: Process for the psychrophile biological purification of waste waters with medium-low concentrations of polluting substances, consisting in a first anaerobic treatment with an expanded mud bed of U.A.S.B. type at a low flow rate, in a second, fluid-bed treatment on a fine support at a high flow rate, and in an end, aerobic treatment for the nitrification and the end oxydation of the various substances reduced in the previous treatments, then recycled to the upstream steps for the removal of possible nutrients, such as nitrogen and phosphorus.

公开(公告)号：DE3133764C2

公开(公告)日：1987-02-12

申请号：DE3133764

申请日：1981-08-26

Applicant: SNAMPROGETTI S.P.A., MAILAND/MILANO, IT

Inventor： LAGANA', VINCENZO ,  SAVIANO, FRANCESCO ,  BISI, PIERO, MAILAND/MILANO, IT

IPC: C01B3/36 ,  C01B3/02 ,  C01B3/26 ,  C01B3/34 ,  C01B3/38

Abstract: An improved process is disclosed for preparing gases containing hydrogen and nitrogen and which is especially suitable for the synthesis of ammonia. Using natural gas or virgin naphtha as the starting materials, the reforming reaction with steam takes place in two serially arranged stages, the first of which occurs at an inlet temperature of from 400 DEG C. to 650 DEG C. and an exit temperature of from 650 DEG C. to 750 DEG C., a conversion of from 20% to 50% being effected, the second stage working at an exit temperature of from 750 DEG C. to 850 DEG C. and the conversion being increased up to 70%. Air reforming is carried out under conditions at which the exit temperature of the gas is between 920 DEG C. and 1050 DEG C. and the sensible heat of the effluent gases from the air reforming at such temperature condition is employed to activate the second steam reforming stage. Tube bundle heat-exchangers, the tubes of which are filled with an appropriate catalyst, are used.