Dow Global Technolgoies LLC

The Dow Chemical Company

Basf Aktiengesellschaft

Enichem S.p.a

Polimeri Europa S.p.a.

Blue Cube IP LLC

Basf Sf

Polimeri Europa S.r.l.

Basf Se Corporation

Anna Forlin

Joaquim Henrique Teles

Ulrich Mueller

Ekkehard Schwab

Ulrich Müller

Giuseppe Paparatto

Paolo Tegon

Hans-Georg Goebbel

Peter Bassler

Peter Rudolf

Rino D'Aloisio

Giordano De Alberti

Hannah L Crampton

Malte Schulz

Hartwig Voss

David H West

Bruce D Hook

Till Gerlach

Meinolf Weidenbach

Philip J Carlberg

William Hoy Heath

John G Pendergast, Jr

Stefan Bitterlich

Armin Diefenbacher

Carlos M Villa

William W Fan

Renate Patrascu

David Jean

Cesar Edmundo Meza

Matthias Schaefer

Henning Schultz

Nima N Nikbin

Irfan Khan

James Wells Carter

Antonio Beccari

Esteban Pedernera

Wells Carter

Massimo Bergamo

Maria Jose Nieves Remacha

Rino D'aloisio

John G Pendergast

Hans-Georg GÖBBEL

Hans-Georg Göbbel

Alkylene oxides are polymerized in a tubular reactor. The alkylene oxide is continuously introduced into the tubular reactor through multiple introduction points located along the length of the tubular reactor. Monomer flow rates are increased along the length of the reactor to maintain a nearly constant concentration of unreacted alkylene oxide.

Alkoxylation process using tubular reactor

Embodiments of the present disclosure are directed to a system and a process for producing an oxirane. For the various embodiments, the system and process of the present disclosure includes: a reaction vessel having a reaction mixture of an olefin, a peroxide compound, a solvent mixture with an alcohol and a non-reactive co-solvent, a solid phase, and reaction products of the reaction mixture, where the reaction products include an oxirane; a separation vessel coupled to the reaction vessel, where an effluent of the reaction mixture and reaction products from the reaction vessel separates in the separation vessel into a liquid aqueous phase and a liquid organic phase; and an extraction vessel coupled to an outlet of the separation vessel, where the liquid aqueous phase taken from the outlet of the separation vessel mixes with an extraction solvent to extract oxirane from the aqueous phase.

System and process for producing an oxirane

A multiple liquid phase composition and process for preparing an oxirane product, such as epichlorohydrin, including a reaction mixture of: (a) at least one olefin, wherein the olefin is selected from one of (i) an aliphatic olefin or substituted aliphatic olefin, with the proviso that the aliphatic olefin is not propylene, (ii) a cycloaliphatic olefin, (iii) an aromatic olefin, (iv) a cycloaromatic olefin, and (v) mixtures thereof; (b) at least one peroxide compound, (c) at least one catalyst, and (d) and a solvent mixture; wherein the solvent mixture comprises at least (i) at least one alcohol or a combination of alcohols, and (ii) at least one non-reactive co-solvent; wherein the solvents are mixed at a predetermined concentration; wherein the non-reactive co-solvent has a different boiling point than the oxirane product; and wherein the oxirane product partitions into a high affinity solvent during the reaction. The process of the present invention advantageously produces a waste stream with no significant amount of sodium chloride (NaCl). In one embodiment, the present invention includes a process for preparing epichlorohydrin from allyl chloride and hydrogen peroxide including reacting (a) an allyl chloride with (b) hydrogen peroxide, in the presence of (c) a titanium silicalite-1 (TS-1) catalyst and (d) in the presence of a predetermined amount of a mixed solvent system; wherein the mixed solvent system includes at least (i) methanol and (ii) at least one non-reactive co-solvent.

Process for producing an oxirane

The present invention relates to a process for separating at least one propylene glycol from a mixture (M) comprising water and said propylene glycol, said process comprising (I) evaporating the mixture in at least two evaporation and/or distillation stages at decreasing operating pressures of the evaporators and/or distillation columns obtaining mixture (M') and mixture (M&#x2033;); (II) separating the mixture (M&#x2032;) obtained in (I) in at least one further distillation step, obtaining a mixture (M-I) comprising at least 70 wt.-% of water and a mixture (M-II) comprising less than 30 wt.-% of water.

Process for separating propylene glycol from aqueous compositions

A process for producing an epoxide such as a cycloaliphatic diepoxide by the reaction of an olefin such as a cycloaliphatic diene with hydrogen peroxide (HO) as an oxidant in the presence of a catalytic system under pH control for example at a pH of less than about 5. The present invention is advantageously used for the epoxidation of olefinic compounds such as olefins and aliphatic or aromatic dienes.

Process for producing epoxides from olefinic compounds

The present invention relates to a continuous process for the preparation of an olefin oxide wherein an olefin is reacted with a hydroperoxidein the presence of a catalyst, and wherein the reaction which is carried out in at least three reactors operated in parallel is controlled by specifically adjusting the catalyst loads in the reactors.

Process for the preparation of an olefin oxide

The present invention provides a process for the epoxidation of propene which comprises reacting propene with hydrogen peroxide in the presence of methanol as solvent and a titanium zeolite catalyst, the process further comprising separating propylene oxide from the reaction mixture to obtain a mixture comprising methanol, water, at least one carboxylic acid and at least one carbonyl compound, wherein the at least one carboxylic acid is at least partially neutralized, said process optionally comprising a hydrogenation stage.

Process for epoxidizing propene

A process in continuous is described for the preparation of oxides of olefins by the direct epoxidation of an olefin with hydrogen peroxide, or compounds capable of producing hydrogen peroxide under the reaction conditions, in a solvent medium, in the presence of a catalytic system consisting of a zeolite containing titanium and a nitrogenated organic base having formula (I). The process allows the production of high conversions and selectivities of the olefin into the corresponding oxide with a stable catalytic activity over a period of time.

Process for the preparation of olefin oxides

A process for the continuous production of an olefinic oxide such as propylene oxide by direct catalytic oxidation of an olefin with hydrogen peroxide. The process involves successive reaction, distillation, decomposition, phase, separation, condensation and distillation with recycle of various streams to provide improved catalyst life and reaction selectivity.

Process for the continuous production of an olefinic oxide

A process for the production of aromatic amines which comprises the reduction of an aromatic compound containing at least two nitro groups with hydrogen in the presence of a catalyst is disclosed. The reaction is carried out so as to maintain up to 10% by weight of reaction intermediates (aminonitrites) and the solution produced is treated to recover the aromatic amine with a purity of over 99% and a mixture consisting of aromatic amine and reaction intermediates is recycled to the reactor.

Process for the production of aromatic amines

The present invention relates to an integrated process for the preparation in continuous of epoxides which comprises: (a) preparing an alcoholic or hydro-alcoholic solution of hydrogen peroxide in a concentration of over 3% by weight, using a gaseous stream containing hydrogen, oxygen and an inert gas, in the presence of a bimetallic catalyst based on palladium and platinum as active components; (b) putting the alcoholic or hydro-alcoholic solution of hydrogen peroxide obtained in step (a) in contact with an olefin and a buffering agent, in the presence of an epoxidation catalyst suspended in the reaction solvent, in order to obtain a reaction mixture containing the epoxide corresponding to the olefin, water and alcoholic solvent; (c) treating the alcoholic stream leaving step (b), after separation of the epoxide, in order to eliminate the nitrogenated compounds present; (d) feeding the alcoholic solvent obtained in (c) to step (a). The process may comprise a further step (e), wherein the raw hydro-alcoholic mixture of the flash column bottom, is used, when necessary, for diluting the alcoholic or hydro-alcoholic solution of hydrogen peroxide obtained in step (a) to the value required by the epoxidation plant. The process operates under high safety conditions and with a high overall efficiency, in terms of productivity and selectivity.

Integrated process for the preparation of olefin oxides

The present invention relates to an integrated process for the preparation in continuous of epoxides which comprises: (a) preparing an alcoholic or hydro-alcoholic solution of hydrogen peroxide in a concentration of over 3% by weight, using a gaseous stream containing hydrogen, oxygen and an inert gas, in the presence of a bimetallic catalyst based on palladium and platinum as active components; (b) putting the alcoholic or hydro-alcoholic solution of hydrogen peroxide obtained in step (a) in contact with an olefin and a buffering agent, in the presence of an epoxidation catalyst suspended in the reaction solvent, in order to obtain a reaction mixture containing the epoxide corresponding to the olefin, water and the alcoholic solvent; (c) treating the alcoholic stream leaving step (b), after separation of the epoxide, in order to eliminate the nitrogenated compounds present; (d) feeding the alcoholic solvent obtained in (c) to step (a). A part of the solvent obtained in (c) can be used, when necessary, for diluting the hydro-alcoholic solution of hydrogen peroxide obtained in step (a) to the value required by the epoxidation plant. The process operates under high safety conditions and with a high overall efficiency, in terms of productivity and selectivity.

Integrated process for the preparation of epoxides

A continuous process is described for the preparation of olefin oxides by direct epoxidation of an olefin with hydrogen peroxide, or compounds capable of producing hydrogen peroxide under the reaction conditions, in a solvent medium, in the presence of a catalytic system consisting of a zeolite containing titanium and a buffer system with a pH controlled within the values of 5.5 to 8.0, consisting of a nitrogenated base and a salt thereof with an organic or inorganic acid. The process allows high conversions and selectivities of the olefin into the corresponding oxide with a catalytic activity stable over a period of time.

Process for the preparation of epoxites

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Vigonza, Italy

Anna Forlin