The presently disclosed subject matter relates to methods and systems for purifying 1,3-butadiene from a C.sub.4 hydrocarbon stream. An example method includes introducing a C.sub.4 hydrocarbon stream including 1,3-butadiene and acetylenes to an organic azide in the presence of a catalyst to generate a first stream including triazole, separating triazole from the first stream to produce a second stream including 1,3-butadiene, and distilling 1,3-butadiene from the second stream to produce a purified 1,3-butadiene product stream.

Processes for producing a linear internal olefin product include the steps of contacting an olefin feed containing C.sub.10-C.sub.20 vinylidenes and a C.sub.10-C.sub.20 normal alpha olefin and/or C.sub.10-C.sub.20 linear internal olefins, a first acid catalyst, and a C.sub.1 to C.sub.18 carboxylic acid to form a first reaction product containing linear internal olefins, trisubstituted olefins, and secondary esters, then removing all or a portion of the secondary esters from the first reaction product, followed by contacting the secondary esters and a second acid catalyst to form a second reaction product comprising linear internal olefins, and then removing all or a portion of the linear internal olefins from the second reaction product to form the linear internal olefin product. Linear alkanes subsequently can be produced by hydrogenating the linear internal olefin product to form a linear alkane product.

Processes for producing a linear internal olefin product include the steps of contacting an olefin feed containing C.sub.10-C.sub.20 vinylidenes and a C.sub.10-C.sub.20 normal alpha olefin and/or C.sub.10-C.sub.20 linear internal olefins, a first acid catalyst, and a C.sub.1 to C.sub.18 carboxylic acid to form a first reaction product containing linear internal olefins, trisubstituted olefins, and secondary esters, then removing all or a portion of the secondary esters from the first reaction product, followed by contacting the secondary esters and a second acid catalyst to form a second reaction product comprising linear internal olefins, and then removing all or a portion of the linear internal olefins from the second reaction product to form the linear internal olefin product. Linear alkanes subsequently can be produced by hydrogenating the linear internal olefin product to form a linear alkane product.

A process for the preparation of a chemical composition comprising an aromatic compound a in a concentration B by weight, based on the total weight of the chemical composition, including: providing the following reaction components: a chemical composition comprising the following: the aromatic compound a in a concentration A by weight based on the total weight of the chemical composition, and an olefin in an amount of about 50 to about 99.99 wt. %, based on the total weight of the chemical composition, and an acidic solid; reacting the components to obtain the chemical composition comprising the aromatic compound a 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.

A process for the preparation of a chemical composition comprising an aromatic compound a in a concentration B by weight, based on the total weight of the chemical composition, including: providing the following reaction components: a chemical composition comprising the following: the aromatic compound a in a concentration A by weight based on the total weight of the chemical composition, and an olefin in an amount of about 50 to about 99.99 wt. %, based on the total weight of the chemical composition, and an acidic solid; reacting the components to obtain the chemical composition comprising the aromatic compound a 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 presently disclosed subject matter relates to methods and systems for purifying 1,3-butadiene from a C4 hydrocarbon stream. An example method includes introducing a C4 hydrocarbon stream including 1,3-butadiene and acetlyenes to an organic azide in the presence of a catalyst to generate a first stream including triazole, separating triazole from the first stream to produce a second stream including 1,3-butadiene, and distilling 1,3-butadiene from the second stream to produce a purified 1,3-butadiene product stream.

The presently disclosed subject matter relates to methods and systems for purifying 1,3-butadiene from a C4 hydrocarbon stream. An example method includes introducing a C4 hydrocarbon stream including 1,3-butadiene and acetlyenes to an organic azide in the presence of a catalyst to generate a first stream including triazole, separating triazole from the first stream to produce a second stream including 1,3-butadiene, and distilling 1,3-butadiene from the second stream to produce a purified 1,3-butadiene product stream.

The invention concerns a process for the neutralization of a catalytic system for the oligomerization of olefins, said catalytic system comprising at least one halogenated derivative, characterized in that the reaction effluent is brought into contact with at least one nitrile compound.

Methods for scavenging carbon disulfide (CS.sub.2) from hydrocarbon streams using treatment compositions comprising at least one CS.sub.2 scavenger and at least one phase transfer catalyst therein. The CS.sub.2 scavenger may comprise at least one polyamine with the general formula: H.sub.2N(R.sub.1NH).sub.xR.sub.2(NHR.sub.3).sub.yNH.sub.2 wherein R.sub.1, R.sub.2, R.sub.3 may be the same or different H, aryl or C.sub.1-C.sub.4 alkyl; and x and y may be integers from 0 to 10. A hydrocarbon product with a reduced concentration of CS.sub.2 therein.

Methods for scavenging carbon disulfide (CS.sub.2) from hydrocarbon streams using treatment compositions comprising at least one CS.sub.2 scavenger and at least one phase transfer catalyst therein. The CS.sub.2 scavenger may comprise at least one polyamine with the general formula: H.sub.2N(R.sub.1NH).sub.xR.sub.2(NHR.sub.3).sub.yNH.sub.2 wherein R.sub.1, R.sub.2, R.sub.3 may be the same or different H, aryl or C.sub.1-C.sub.4 alkyl; and x and y may be integers from 0 to 10. A hydrocarbon product with a reduced concentration of CS.sub.2 therein.