Abstract: A process for producing methanol, wherein a make-up gas stream from a reformer unit is admixed with a hydrogen-containing stream from a hydrogen recovery stage to obtain a hydrogen-rich synthesis gas, which is combined with a residual gas stream and the combined stream is passed through a bed of a methanol synthesis catalyst at elevated pressure and elevated temperature to obtain a product stream comprising methanol and the residual gas stream and wherein the product stream is cooled to remove methanol from the residual gas stream. Wherein a portion of the residual gas stream is removed as a purge gas stream and a portion of the hydrogen-rich synthesis gas stream is removed and combined with the purge gas stream to obtain a mixed synthesis gas stream and the mixed synthesis gas stream is sent to the hydrogen recovery stage to produce the hydrogen-containing stream.

Abstract: The invention relates to a process and a plant for producing an olefins-containing hydrocarbon product by reaction of an oxygenates-containing reactant mixture, which is divided into a plurality of reactant mixture substreams, in a multi-stage oxygenate-to-olefin (OTO) synthesis reactor comprising a plurality of serially connected reaction sections comprising catalyst zones, wherein a feeding apparatus for a reactant mixture substream is arranged upstream of each catalyst zone. In each of these reaction sections a reactant mixture substream is introduced and therein under oxygenates conversion conditions converted into olefins and further hydrocarbons, wherein all reaction sections save for the first are additionally supplied with the product stream from the respective upstream reaction section. In addition at least one steam stream is introduced into at least one reaction section and at least one hydrocarbons-containing recycle stream is introduced into at least one reaction section.

Abstract: Thermoplastic polyesters are made by a method in which precondensation is carried in a column whose sections are formed with structured packings and operated at subatmospheric, pressure.

Abstract: The invention relates to a method for the manufacture of polyester or copolyester without the application of a weighing machine for dosing the solid principal raw material, dicarboxylic acid, and an appropriate concept for the closed-loop control of the molar ratio of the paste prepared from the starting materials without the direct measurement of the mass flow of the solid principal raw material, dicarboxylic acid, by weighing. In addition, an indirect method for the determination of the raw material consumption without direct weighing of the solid raw material is suggested.

Abstract: Thermoplastic polyesters are made by a method in which precondensation is carried in a column whose sections are formed with structured packings and operated at subatmospheric, pressure.