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公开(公告)号：DE3519115C2
公开(公告)日：1989-03-30
申请号：DE3519115
申请日：1985-05-28
Applicant: SNAMPROGETTI S.P.A., MAILAND/MILANO, IT
Inventor： PREVEDELLO, ALDO , PLATONE, EDOARDO, SAN DONATO MILANESE, MAILAND/MILANO, IT , PICCININI, CARLO, CALCINELLI DI SALTARA, PESARO, IT
Abstract: A fluidifier and stabilizer additive, particularly suitable for coal suspensions in water, based on sulphonated tar, wherein sulphonated and salified tar results to be also oxidized, the oxidation being evidenced by the development of SO2 to the extent of 2 to 60% by wt, w.r.t. the tar during the sulphonation reaction. Also there is a method for the preparation of the additive, consisting in contacting tar with liquid or gaseous SO3, tar and/or SO3 being preferably dissolved in an halogenated organic solvent; the solvent is recovered and the oxidized sulphonated additive is salified.
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公开(公告)号：DE3225273C2
公开(公告)日：1989-03-16
申请号：DE3225273
申请日：1982-07-06
Applicant: SNAMPROGETTI S.P.A., MAILAND/MILANO, IT
Inventor： BORZA, MICHELE, CREMON, IT , LEONCINI, SERGIO, MAILAND/MILANO, IT , MODENESI, ALDO, PIACENZA, IT
IPC: B01D11/04 , C10G21/00 , C10G53/04 , C10M175/00
Abstract: A process for reclaiming spent oil comprises the steps of removing water and light hydrocarbons, thermally treating the stripped oil, extracting it with a supercritical gas to insolubilize impurities and additives, separating the gas-rich fractions from the oil-depleted gas fractions, expanding the insoluble fractions, separating the additives and impurities, separating the various hydrocarbon fractions according to the respective viscosities, compressing and recycling the gas phases and withdrawing the residue and the oil fractions according to the respective viscosities.
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公开(公告)号：DE2521963C3
公开(公告)日：1988-10-20
申请号：DE2521963
申请日：1975-05-16
Applicant: SNAMPROGETTI S.P.A., MAILAND/MILANO, IT
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公开(公告)号：DE3319099C2
公开(公告)日：1987-06-11
申请号：DE3319099
申请日：1983-05-26
Applicant: SNAMPROGETTI S.P.A., MAILAND/MILANO, IT
Inventor： FORLANI, ORFEO, MAILAND/MILANO, IT , ANCILLOTTI, FRANCESCO , NOTARI, BRUNO, SAN DONATO MILANESE, MAILAND/MILANO, IT
IPC: B01J29/06 , B01J21/04 , B01J21/08 , B01J21/12 , B01J23/02 , B01J23/04 , B01J23/08 , B01J23/10 , B01J23/74 , B01J23/76 , C07B61/00 , C07C1/00 , C07C5/23 , C07C5/25 , C07C11/08 , C07C67/00
Abstract: Catalysts based on gamma alumina, consisting of gamma alumina stabilised by silica and containing oxides of bivalent or trivalent metals chosen from those of Group 2a and/or Group 8 and/or Group 3b and/or the Lanthanide Series, are disclosed. The catalysts are particularly active in isomerisation reactions.
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公开(公告)号：DE3227465C2
公开(公告)日：1987-05-14
申请号：DE3227465
申请日：1982-07-22
Applicant: SNAMPROGETTI S.P.A., MAILAND/MILANO, IT
Inventor： GAZZI, LUIGI, MAILAND/MILANO, IT , COTONE, GIANCARLO , SOLDATI, GIANFRANCO , GINASI, ALESSANDRO, S. DONATO MILANESE, MAILAND/MILANO, IT , VETERE, ALESSANDRO, MAILAND/MILANO, IT , RESCALLI, CARLO, S. DONATO MILANESE, MAILAND/MILANO, IT
Abstract: A process is described for stripping acidic gases, mainly hydrogen sulphide and carbon dioxide, from natural gas or synthesis gas, especially when the percentages of such acidic gases are high and the conventional processes become economically objectionable. The process is based on the use of a number of selective solvents, generally belonging to the class of esters, ethers, mixed ester-ethers and lactones, in combination with sequential absorbing cycles which start from the stripping of hydrogen sulphide, and comprise the regeneration of the solvents used by several expansion cycles: H2S and CO2 are recovered and the regenerated solvents recycled.
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Patent Agency Ranking
公开(公告)号：DE3136088C2
公开(公告)日：1987-03-26
申请号：DE3136088
申请日：1981-09-11
Applicant: SNAMPROGETTI S.P.A., MAILAND/MILANO, IT
Inventor： PAGGINI, ALBERTO, SPINO D'ADDA, IT , LAGANA, VINCENZO, MILAN, IT , MANARA, GIOVANNI , FATTORE, VITTORIO, SAN DONATO MILANESE, IT
IPC: B01J23/26 , C07C27/00 , C07C27/06 , C07C29/15 , C07C29/151 , C07C29/153 , C07C31/02 , C07C67/00 , C10L1/02
Abstract: Mixtures of methanol and higher alcohols to be used in particular as fuels, either alone or in admixture with petrol, are produced by reacting H2 and CO, possibly in the presence of CO2, in a molar ratio H2:CO of from 0.1:1 to 20:1, preferably from 0.5:1 to 5:1, at a temperature of from 300 to 500 DEG C, preferably from 350 to 450 DEG C, and at a pressure of from 2000 to 16000 KPa, in the presence of a catalyst based on chromium, zinc and at least one alkali metal. The Zn:Cr weight ratio of the catalyst, considered as oxides thereof, is from 5:1 to 1:1 and the alkali metals or the alkali metals as oxides are present in an amount of 0.5 to 5% by weight relative to the total of the elements considered as oxides.
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公开(公告)号：DE3126136C2
公开(公告)日：1987-01-22
申请号：DE3126136
申请日：1981-07-02
Applicant: SNAMPROGETTI S.P.A., MAILAND/MILANO, IT
Inventor： GAZZI, LUIGI, MAILAND/MILANO, IT , RESCALLI, CARLO, SAN DONATO MILANESE, IT , SCARAMUCCI, MARIA ANTONIETTA, MAILAND/MILANO, IT , GINNASI, ALESSANDRO, SAN DONATO MILANESE, IT
Abstract: There is disclosed a process for selectively separating hydrogen sulfide from gaseous mixtures which also contain carbon dioxide by chemical absorption with a substantially anhydrous solution of a tertiary amine, such as methyl diethanolamine, and an auxiliary organic solvent, such as sulfolane.
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公开(公告)号：DE3218503C2
公开(公告)日：1986-06-19
申请号：DE3218503
申请日：1982-05-17
Applicant: SNAMPROGETTI S.P.A., MAILAND/MILANO, IT
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公开(公告)号：DE2901090C2
公开(公告)日：1986-06-05
申请号：DE2901090
申请日：1979-01-12
Applicant: SNAMPROGETTI S.P.A., MAILAND/MILANO, IT
IPC: C10M175/04 , C10G21/00 , C10G31/06 , C10G53/04 , C10G67/04 , C10M175/00 , C10N40/25 , C10M175/02
Abstract: For refining spent motor oils in order to recover lubricating bases to be reused, the stock to be refined is first stripped of water and light hydrocarbons, then a first extraction with a solvent (preferably a lower paraffin), heating the oil stripped of the solvent, distilling it under vacuum to separate light, medium and heavy lubricating bases, heating the heavier lubricating base and then extracting it with the same solvent as aforesaid, and sending the lubricating bases, separately and individually, to a hydrofinishing stage. The recycle to solvent extraction of the heavy bases affords the advantage of important heat savings and the possibility of adopting blander working conditions in the hydrofinishing of the heavier lubricating bases.
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公开(公告)号：DE3112277C2
公开(公告)日：1985-05-02
申请号：DE3112277
申请日：1981-03-27
Applicant: SNAMPROGETTI S.P.A., MAILAND/MILANO, IT
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