公开(公告)号：DE3220547C2

公开(公告)日：1983-07-07

申请号：DE3220547

申请日：1982-06-01

Applicant: SNAMPROGETTI S.P.A., 20121 MILANO, IT

Inventor： MANARA, GIOVANNI, MILANO, IT

IPC: C07C41/09 ,  B01J21/08 ,  B01J23/80 ,  B01J23/86 ,  B01J29/035 ,  B01J37/04 ,  C07B61/00 ,  C07C41/00 ,  C07C41/01 ,  C07C41/08 ,  C07C43/04 ,  C07C67/00 ,  B01J21/06

Abstract: A process for producing dimethyl ether (DME) from CO and H2, and possibly also CO2, is disclosed in which the gaseous reactants are reacted in the presence of a catalytic composition constituted overall by a mixture of: (a) crystalline silica in which some silicon atoms in the crystal lattice have been replaced by aluminium, and which corresponds to the general formula: Si1Al (0.0012 &cirf& 0.0052)Oy where y varies between 2.0018 and 2.0075; and (b) a mixture of Cu/Zn/Cr and/or Cu/Zn/Al oxides and/or salts; the Al can also be present together with the Cr. Good yields of DME can be achieved at temperatures lower than those normally associated with the dehydration of methyl alcohol to produce DME.

公开(公告)号：DE3204944C2

公开(公告)日：1983-03-17

申请号：DE3204944

申请日：1982-02-12

Applicant: SNAMPROGETTI S.P.A., 20121 MILANO, IT

Inventor： LAGANA', VINCENZO, MILANO, IT ,  CAVALLANTI, VIRGINIO, CREMONA, IT

IPC: B01D53/14 ,  C07D301/32

Abstract: This invention relates to a process for the isothermal absorption of the ethylene oxide contained in the gas from an ethylene oxide production plant. This process is characterized in that the gas is firstly cooled to a temperature of between 5 DEG and 60 DEG C., and is then fed at a pressure which can vary from 1 to 30 atm. to a water-fed isothermal film absorber, from the bottom of which is obtained a high concentration ethylene oxide solution which can be fed directly to a glycol production plant after recovering the ethylene still in solution. By using this process, the absorption plant is simplified compared with known processes, and steam, electricity and cooling water consumption are considerably reduced.

公开(公告)号：DE2924869C2

公开(公告)日：1983-02-17

申请号：DE2924869

申请日：1979-06-20

Applicant: SNAMPROGETTI S.P.A., 20121 MILANO, IT

Inventor： MANARA, GIOVANNI ,  FATTORE, VITTORIO ,  TARAMASSO, MARCO ,  NOTARI, BRUNO, SAN DONATO MILANESE, IT

IPC: B01J21/00 ,  B01J21/08 ,  B01J23/00 ,  B01J29/86 ,  B01J29/88 ,  B01J29/89 ,  B01J35/10 ,  C07B61/00 ,  C07C1/00 ,  C07C1/20 ,  C07C7/148 ,  C07C11/02 ,  C07C11/09 ,  C07C67/00

Abstract: A process is disclosed for preparing tertiary olefins having a high degree of purity and in good yields starting from tertiary ethers such as methyltert.butyl ether and in which the improvement comprises using an extremely efficient catalyst system which consists of a crystalline silica having a high specific surface area and which has been modified by an oxide of a metallic cation having an at least partially amphoteric character. Such catalyst may be, if appropriate, accompanied by an alumina-modified silica as an adjuvant co-catalyst.

公开(公告)号：DE2451839C2

公开(公告)日：1982-11-25

申请号：DE2451839

申请日：1974-10-31

Applicant: SNAMPROGETTI S.P.A., 20121 MILANO, IT

Inventor： ARRIGHETTI, SERGIO, DR., MILANO, IT ,  BRANCACCIO, ALDO, DR., CREMONA, IT ,  CESCA, SEBASTIANO, DR. ,  GIULIANI, GIANPAOLO, SAN DONATO, MILANESE, IT

IPC: C08F14/00 ,  C08F2/06 ,  C08F255/00 ,  C08F255/04 ,  C08F255/06 ,  C08F291/02

Abstract: A polymeric material having high impact resistance and improved resistance to ageing is prepared by grafting monomers such as acrylonitrile and styrene upon a rubbery terpolymer of ethylene, an alpha-olefin such as propylene and a triene termonomer such as 2-(1' or 2' or 3' methyl-1' or 2' or 3' cyclopenta-2' or 4' dienyl) norborn-5-enyl-methane, containing from 0.1 to 20 pairs of conjugate double bonds per thousand carbon atoms in the polymer chain.

公开(公告)号：DE2331515C2

公开(公告)日：1982-09-16

申请号：DE2331515

申请日：1973-06-20

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

Inventor： NERI, CARLO ,  PERROTTI, EMILIO, SAN DONATO, MILANESE, IT

IPC: C07B61/00 ,  B01J23/00 ,  B01J23/32 ,  B01J23/70 ,  B01J27/00 ,  C07C20060101 ,  C07C67/00 ,  C07C301/00 ,  C07C303/20 ,  C07C303/32 ,  C07C309/02 ,  C07C309/04 ,  C07C309/14 ,  C07C309/20 ,  C11D20060101 ,  C11D1/12 ,  C11D1/14 ,  C07C139/12

公开(公告)号：DE2840066C3

公开(公告)日：1982-05-06

申请号：DE2840066

申请日：1978-09-14

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

Inventor： PASERO, RICCARDO, MILANO, IT ,  FRANCUCCI, BERNARDINANGELO, SAN DONATO MILANESE, IT

IPC: B01D1/06 ,  B01D1/26 ,  C02F1/08

公开(公告)号：DE2722578C2

公开(公告)日：1982-04-22

申请号：DE2722578

申请日：1977-05-18

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

Inventor： ZAFFARONI, PASQUALE, MENTANA, ROMA, IT ,  VITOBELLO, VINCENZA ,  GAMALERIO, ANNA MARIA, ROMA, IT

IPC: C07J1/00 ,  C07J9/00 ,  C12P33/00

Abstract: A method is disclosed for the microbiological transformation of steroids, especially cholesterol, by employing culture media which contain hydrocarbons rather than carbohydrates. Paraffinic hydrocarbons, particularly normal paraffins from 15 to 20 carbon atoms, are used as the only carbon and energy sources. SP2T (NRRL B-11, 112), SP3T bis (NRRL B-11, 113), SP5T (NRRL B-11, 114), SP7T/1 (NRRL B-11, 115), SP742XXA (NRRL B-11, 116), SP731RD (NRRL B-11, 117), and SP734D (NRRL B-11, 118) are bacterial strains which can be used to this purpose.

公开(公告)号：DE2844688C3

公开(公告)日：1982-04-15

申请号：DE2844688

申请日：1978-10-13

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

Inventor： BARTOLI, FRANCESCO ,  MORISI, FRANCO, ROMA, IT ,  ZACCARDELLI, DELIO, MONTEROTONDO, ROMA, IT

IPC: B01J19/24 ,  A23C21/02 ,  C12M1/40

Abstract: For effecting enzymic reaction, a reactor is disclosed, in which the flow of the solution to be treated through the catalytic bed material takes place radially. It is preferred to have the catalytic bed in the form of coils of enzyme-occluding fibers. The coils are variously piled up within the reactor. High outputs, low pressure drops and more than satisfactory conversion rates are obtained.

公开(公告)号：DE2631048C3

公开(公告)日：1982-04-15

申请号：DE2631048

申请日：1976-07-09

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

Inventor： DEGEN, LUDWIG, ROMA, IT ,  VIGLIA, AURELIO, MONTEROTONDO, ROMA, IT ,  FASCETTI, EUGENIO ,  PERRICONE, ELENA, ROMA, IT

IPC: C12N9/86 ,  C12P13/04 ,  C12P41/00 ,  C12R1/38 ,  C07C127/17

Abstract: A method is disclosed for preparing the "D" form of an optically active aminoacid derivative from a racemic hydantoin. The method of the invention comprises subjecting the racemic hydantoin to hydrolysis in the presence of an enzymatic complex derived from the strain of microorganisms of the genus Pseudomonas which is designated sp. 942 (CBS 145.75) or sp. 945 (CBS 146.75), the hydrolysis being effected at a temperature in the range of from 10.degree. to 60.degree.C., and at an alkaline pH in the range of from pH 7 to pH 10.

公开(公告)号：DE2828953C2

公开(公告)日：1982-02-04

申请号：DE2828953

申请日：1978-06-30

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

Inventor： CORBELLINI, MARGHERITA, MILANO, IT ,  GRECO, ALBERTO, DRESANO, IT ,  OSELLAME, MIRKO, OMBRIANO, IT

IPC: C08F4/00 ,  C01G1/06 ,  C01G23/00 ,  C01G31/00 ,  C08F4/60 ,  C08F4/62 ,  C08F4/639 ,  C08F4/64 ,  C08F10/00 ,  C08F10/02 ,  C01G23/02

Abstract: For the polymerization of ethylene, as such or with one or more alpha-olefines, a novel catalyst composition is suggested, which has a high yield of polymer per weight unit of catalyst. Such compositions are prepared from a titanium compound in which the valency of Ti is 3 or more, said compound being reacted with the vapors of one or more metals of the group consisting of Al, Cr, Mn, V, Ti, Zr, Mo, Zn and Ca in the presence of a halogen donor which is preferably an organic halide, certain inorganic halides being capable of being used provided that the halide metal has at least two degrees of valency. The composition is used in association with an aluminium hydrocarbyl halide. Yields as high as 30,000 grams of polymer per gram of elemental Ti can be obtained.