A process for the construction of a second chemical plant, which second chemical plant is suitable for the separation of cyclohexanone from a second mixture, which second mixture comprises reaction products from the hydrogenation of phenol, said process comprising: a) providing a first chemical plant, which first chemical plant is suitable for the separation of cyclohexanone from a first mixture, which first mixture comprises reaction products from the oxidation of cyclohexane, and which first plant comprises: i) a distillation column (C) suitable for distilling overhead cyclohexane; ii) a distillation column suitable for distilling overhead cyclohexanone; iii) a cyclohexane oxidation unit (A) suitable for the oxidation of cyclohexane; and iv) a heat recovery unit (B) suitable for the recovery of heat from off-gas from the cyclohexane oxidation unit suitable for the oxidation of cyclohexane; b) disabling in said first chemical plant, said distillation column (C) suitable for distilling overhead cyclohexane, said cyclohexane oxidation unit (A) and said heat recovery unit (B), wherein the second chemical plant comprises a distillation column (F) suitable for distilling overhead cyclohexanone reused from the first chemical plant, wherein each of the first chemical plant and the second chemical plant comprise a distillation column (E) suitable for distilling overhead components having a lower boiling point than cyclohexanone; a distillation column (G) suitable for distilling overhead a mixture comprising cyclohexanol and cyclohexanone in a wt.:wt. ratio of at least 4:1; and a cyclohexanol dehydrogenation unit (H) suitable for the dehydrogenation of cyclohexanol to cyclohexanone.

The invention is concerned with a method for producing a conjugated diene including a reaction step of subjecting a raw material gas containing a monoolefin having a carbon atom number of 4 or more to an oxidative dehydrogenation reaction with a gas containing molecular oxygen in the presence of a catalyst, to obtain a reaction product gas containing a conjugated diene; and a cooling step of cooling the reaction product gas, wherein in the cooling step, a cooling agent is supplied into a cooling column and brought into contact with the reaction product gas; the cooling agent discharged from the cooling column is then cooled by a heat exchanger; a precipitate dissolved in the cooling agent is precipitated within the heat exchanger and recovered; and the cooling agent from which the precipitate has been recovered is circulated into the cooling column.

In a process for isoparaffin-olefin alkylation, a feed comprising at least one olefin and at least one isoparaffin is contacted under alkylation conditions in the presence of a solid acid catalyst comprising a crystalline microporous material of the MWW framework type to produce an alkylated product. The alkylated product comprises a C.sub.8− fraction, which is useful as a gasoline blending stock, and a C.sub.9+ fraction, which is separated from the alkylated product and at least partially recycled to the alkylation step.

A system and method to partially vaporize a process or feed water stream does so in a liquid pool zone of a vessel as the stream comes into contact with a heating medium that is less volatile than the process stream. To keep the pool hot, the heating medium can be recirculated through a heater of a pump-around loop or a heater can be placed in the liquid pool. As the process stream is partially vaporized, any solids present in the process stream together with the unvaporized process or feed water stream move into the heating medium. These solids and unvaporized liquids may be further removed from the heating medium in the pool or in the pump-around loop. The vaporized process stream can be further condensed. Any heat recovered can be used to pre-heat the process stream or in the pump-around loop's heater in case of mechanical vapor recovery.

Processes for producing high biogenic concentration Fischer-Tropsch liquids derived from the organic fraction of municipal solid wastes (MSW) feedstock that contains a relatively high concentration of biogenic carbon (derived from plants) and a relatively low concentration of non-biogenic carbon (derived from fossil sources) wherein the biogenic content of the Fischer-Tropsch liquids is the same as the biogenic content of the feedstock.

The invention relates to a method for removing oxygen from hydrocarbon-containing gas mixtures, characterized in that a hydrocarbon-containing gas mixture containing 50 vol % of one or more hydrocarbons, 2 to 10 vol % of oxygen, and possibly one or more gases from the group comprising nitrogen, noble gases, hydrogen, carbon dioxide, carbon monoxide, and water is introduced into an isothermally operated reactor, in which the oxygen contained in the hydrocarbon-containing gas mixture is at least partially converted into carbon dioxide and water in the presence of one or more catalysts, wherein the specifications in vol % relate to the total volume of the hydrocarbon-containing gas mixture introduced into the reactor and add up to 100 vol % in total.

This invention relates to a catalyst used in a carbonylation of methanol using carbon monoxide to acetic acid, and more particularly to a heterogeneous catalyst represented by Rh/WxC (where x is an integer of 1 or 2) in which a complex of a rhodium compound and 3-benzoylpyridine is fixed on a support of tungsten carbide.

A process and system for separating paraxylene from a mixture of paraxylene, metaxylene, orthoxylene, and ethylbenzene in a simulated moving bed apparatus using a membrane to separate non-aromatics from a desorbent stream. The lower nonaromatics content in the desorbent improves paraxylene product purity, increases paraxylene production at the same desorbent rate, reduces the desorbent rate, and/or reduces energy consumption in the product tower.

A gas pressurized separation system strips a product gas from a stream yielding a high pressure gaseous effluent containing the product gas such as may be used to capture CO.sub.2 from coal fired post combustion flue gas capture and to purify natural gas, syngas and EOR recycle gas. The system comprises a gas pressurized stripping column allowing flow of one or more raw streams in a first direction and allowing flow of one or more high pressure gas streams in a second direction, to strip the product gas into the high pressure gas stream and yield a high pressure gaseous effluent that contains the product gas. The process can further comprise a final separation process to further purify the product gas from the GPS column. For CO.sub.2 product, a preferred energy efficient final separation process, compound compression and refrigeration process, is also introduced.

The present invention provides a carbon dioxide reduction catalyst that is used in reduction reactions of carbon dioxide and that has high methanol selectivity. A carbon dioxide reduction catalyst according to the present invention is used in producing methanol by reduction reactions of carbon dioxide, and contains Au and Cu as catalyst components and ZnO as a carrier. It is preferable that the catalyst components contain 7-25 mol % of Au as a catalyst component. This makes it possible to obtain high methanol selectivity—for example, selectivity of not less than 80%. The carbon dioxide reduction catalyst makes it possible to obtain high methanol selectivity even under the conditions of not more than 240° C. and not more than 50 bar.