The present invention relates generally to methods and systems for removing oxygen from at least one product stream of a hydrocarbon oxidative dehydrogenation process. More specifically, in some embodiments, the oxidative dehydrogenation process is an ethane oxidative dehydrogenation process for producing ethylene, or a mixed alkane oxidative dehydrogenation process for producing ethylene and propylene, among other components.

Treatment of hydrocarbon streams, and in one non-limiting embodiment refinery distillates, with reducing agents, such as borohydride and salts thereof, alone or together with at least one co-solvent results in reduction of the sulfur compounds such as disulfides, mercaptans, thiophenes, and thioethers that are present to give easily removed sulfides. In one non-limiting embodiment, the treatment converts the original sulfur compounds into hydrogen sulfide or low molecular weight mercaptans that can be extracted from the distillate with caustic solutions, hydrogen sulfide or mercaptan scavengers, solid absorbents such as clay or activated carbon or liquid absorbents such as amine-aldehyde condensates and/or aqueous aldehydes.

A process is presented for the recovery of solvent used in an alkylation process. The solvent removes heavy hydrocarbons from a C4 stream. The C4 stream is passed to an alkylation unit to generate an alkylate product. A portion of the solvent is carried over with the C4 stream and needs to be recovered to reduce the aromatics content in the C4 stream, to reduce any deleterious effects of the aromatics in downstream processing.

A process is presented for the recovery of solvent used in an alkylation process. The solvent removes heavy hydrocarbons from a C4 stream. The C4 stream is passed to an alkylation unit to generate an alkylate product. A portion of the solvent is carried over with the C4 stream and needs to be recovered to reduce the aromatics content in the C4 stream, to reduce any deleterious effects of the aromatics in downstream processing.

Provided are an industrially advantageous method for separating and purifying isobutylene, the method enabling high-purity isobutylene to be efficiently obtained by a simple process, and a method for producing isobutylene. A method for separating and purifying isobutylene from a reaction gas containing the isobutylene and unreacted isobutanol, comprising: a step (1) of contacting the reaction gas containing the isobutylene and unreacted isobutanol with a first solvent to obtain a first gas containing the isobutylene and a recovered solution containing the unreacted isobutanol; a step (2) of contacting the first gas with a specific second solvent to allow the second solvent to absorb the isobutylene contained in the first gas to obtain an absorption solution containing the isobutylene; and a step (3) of distilling the absorption solution to obtain separated and purified isobutylene. A method for producing isobutylene using the separation and purification method.

A process for producing an isomerized product comprises sending a feed stream comprising butanes, hydrogen and an organic chloride to a butane isomerization reactor containing an isomerization catalyst to convert a portion of normal butanes in said feed stream to iso-butanes in an isomerized stream. The isomerized stream to a stabilizer column to produce a butane stream containing normal, iso-butanes and C5 hydrocarbons; the butane stream is sent to a column to produce an isomerized upper stream and a bottoms stream comprising a mixture of butanes, C5 hydrocarbons and organic chloride. The bottoms stream is sent to an organic chloride decomposition reactor to produce a mixture of HCl, hydrogen and hydrocarbons.

A process for the preparation of a chemical composition comprising an aromatic compound in a concentration B by weight, based on the total weight of the chemical composition, comprising: a. providing the following reaction components: i. a chemical composition comprising the following: a) The aromatic compound in a concentration A by weight based on the total weight of the chemical composition, and b) An olefin in an amount in an amount of about 50 to about 99.99 wt. %, based on the total weight of the chemical composition, and ii. An acid; and b. reacting the components to obtain the chemical composition comprising the aromatic compound in a concentration B by weight based on the total weight of the chemical composition; wherein the concentration B is less than the concentration A.

The present invention relates to a method for purifying a flow (1) of natural gas, comprising the following steps: a) a step (5) of processing at least a portion (3) of the flow (1) by pyrolysis at a temperature in the range from 1000? C. to 2000? C. so as to decompose the hydrocarbons which comprise at least two carbon atoms into elemental carbon and dihydrogen H.sub.2 and to thereby obtain a processed flow (6), then b) a step (7) of eliminating the elemental carbon which is present in the processed flow (6) from step a) so as to obtain a processed flow without any elemental carbon (8); then c) when steps a) and b) have been carried out on only a portion of the flow (I) of natural gas, a step (IO) of mixing the processed flow without any elemental carbon (8) from step b) with the portion (4) of the non-processed flow; then d) obtaining a flow of purified natural gas (11) which consists of either the mixture (10) from step c) or the processed flow without any elemental carbon (8) from step b). The invention also relates to preparing a fuel from the natural gas purified in this manner.

The present invention relates to a method for purifying a flow (1) of natural gas, comprising the following steps: a) a step (5) of processing at least a portion (3) of the flow (1) by pyrolysis at a temperature in the range from 1000? C. to 2000? C. so as to decompose the hydrocarbons which comprise at least two carbon atoms into elemental carbon and dihydrogen H.sub.2 and to thereby obtain a processed flow (6), then b) a step (7) of eliminating the elemental carbon which is present in the processed flow (6) from step a) so as to obtain a processed flow without any elemental carbon (8); then c) when steps a) and b) have been carried out on only a portion of the flow (I) of natural gas, a step (IO) of mixing the processed flow without any elemental carbon (8) from step b) with the portion (4) of the non-processed flow; then d) obtaining a flow of purified natural gas (11) which consists of either the mixture (10) from step c) or the processed flow without any elemental carbon (8) from step b). The invention also relates to preparing a fuel from the natural gas purified in this manner.

Provided is a method of producing an oligomer, the method including: supplying a monomer stream and a solvent stream to a reactor to perform an oligomerization reaction to produce a reaction product; supplying a discharge stream of the reactor to a separation device, and supplying an upper discharge stream of the separation device including an unreacted monomer to the reactor and supplying a lower discharge stream of the separation device to a settling tank; settling a polymer in the settling tank and removing the polymer, and supplying the lower discharge stream of the separation device from which the polymer is removed to a high-boiling point separation column; removing a high-boiling point material from a lower discharge stream of the high-boiling point separation column and supplying an upper discharge stream of the high-boiling point separation column including an oligomer to a solvent separation column; and separating a solvent and the oligomer in the solvent separation column.