Abstract: The invention relates to a system and a method for converting a carbonaceous feedstock in a multistep procedure in which a) syngas is made from the carbonaceous feedstock, b) the syngas is converted by a methanation reaction into methane and c) methane is converted by a methane pyrolysis reaction into H2 and sold carbon. Optionally, steps a) and b) can be carried out in a first location and the methane is transported to a second location where step c) is carried out.

Abstract: The invention relates to a process for preparing C2-C4 olefins from methanol, comprising the steps of: A) feeding a feed stream A comprising methanol into a dimethyl ether fixed bed reactor and catalytically converting methanol to dimethyl ether to obtain a product stream A1 comprising dimethyl ether, methanol and water vapor; B) mixing stream A1 with one or more hydrocarbon recycle streams R comprising C2-C6 hydrocarbons and catalytically converting it in an olefin fixed bed reactor to a crude product stream B comprising C2-C4 olefins, C5-C6 hydrocarbon and C6+ hydrocarbons; C) cooling crude product stream B to obtain a hydrocarbon crude product stream C; D) separating hydrocarbon crude product stream C into at least one ethylene-comprising stream, at least one propylene-comprising stream, at least one stream comprising butenes, at least one stream comprising C5-C6 hydrocarbons, and at least one by-product stream N comprising C6+ hydrocarbons; E) recycling a portion of the C2-C4 olefins selected from ethy

Abstract: The invention relates to a method for producing C2-C4 olefins from methanol and ethanol, said method having the steps of: A) feeding a methanol- and optionally ethanol-containing feed flow A into a dimethyl ether fixed-bed reactor and catalytically reacting methanol to form dimethyl ether, wherein a product flow A1 containing dimethyl ether, methanol, ethanol and steam is obtained; B) mixing the flow A1 with at least one hydrocarbon return flow R containing C2-C6 hydrocarbons and catalytically reacting the mixture in an olefin fixed-bed reactor to form a raw product flow B containing C2-C4 olefins, C5-C6 hydrocarbon and C7+ hydrocarbons; C) cooling the raw product flow B, wherein a hydrocarbon raw product flow C is obtained; D) separating the hydrocarbon raw product flow C in a propylene-containing value product flow, optionally an ethylene-containing value product flow, a butene-containing value product flow, at least one C5-C6 hydrocarbon-containing return flow and at least one C6+ hydrocarbon-containing au

Abstract: A process for producing a synthesis gas mixture comprising hydrogen and carbon monoxide by noncatalytic partial oxidation of hydrocarbons in the presence of oxygen and carbon dioxide, in which at least one reactant gas comprising hydrocarbons, an oxygen-comprising reactant gas and a carbon dioxide-comprising reactant gas are fed into a partial oxidation reactor and reacted at a temperature in the range from 1200 to 1550° C. to give a product gas mixture comprising water, carbon monoxide and carbon dioxide, at least by separating a portion of the carbon dioxide from the product gas mixture and recycling it into the partial oxidation reactor, wherein the carbon dioxide fed into the partial oxidation reactor comprises additional imported carbon dioxide, giving a product gas mixture in the partial oxidation reactor that has a molar ratio of hydrogen to carbon monoxide in the range from 0.8:1 to 1.6:1.

Abstract: Enolic monoether and diether of adipic dialdehyde such as 6-methoxy-5-hexene-1-al, 1,6-dimethoxy-1,5-hexadiene, 1,6-bis-(2 hydroxy propoxy)-1,5-hexadiene are prepared by heating to a sufficiently high temperature for a Cope rearrangement, e.g., 150.degree. to 450.degree. C. of the corresponding monoether or diether of 1,5-hexadiene-3,4-diol.