Process of preparing aromatic hydrocarbons and liquefied petroleum gas from hydrocarbon mixture

Abstract

Disclosed is a process of preparing aromatic hydrocarbons and liquefied petroleum gas (LPG) from a hydrocarbon mixture, in which a non-aromatic compound in the hydrocarbon feedstock mixture is converted into a gaseous material having a large amount of LPG through hydrocracking, and an aromatic compound therein is converted into an oil component having large amounts of benzene, toluene, and xylene (BTX) through dealkylation and transalkylation, in the presence of a catalyst obtained by supporting platinum / bismuth onto a mixture support having zeolite and an inorganic binder. The gaseous product is separated into LPG and a mixture of methane and ethane depending on differences in boiling point through distillation, while the liquid product is separated into benzene, toluene, xylene, and C9+ aromatic compounds depending on differences in boiling point through distillation.

Description

technical field

[0001] The invention relates to a method for preparing aromatic hydrocarbons and liquefied petroleum gas from hydrocarbon mixtures. More specifically, the present invention relates to a process for the conversion of non-aromatic hydrocarbon compounds in hydrocarbon feedstock mixtures into gaseous substances rich in liquefied petroleum gas by hydrocracking in the presence of platinum / bismuth supported zeolite-based catalysts; and A method of converting aromatic hydrocarbon compounds into oily components including benzene, toluene and xylene through dealkylation / transalkylation. Background technique

[0002] Generally, aromatics are obtained by separating raw materials containing a large amount of aromatic compounds (such as reformed oil obtained by catalytic reforming and pyrolysis gasoline obtained by naphtha cracking) from non-aromatic hydrocarbons by solvent extraction . According to different boiling points, the aromatic hydrocarbon mixture obtained in t...

Examples

Embodiment 1

[0068] mix carrier with H 2 PtCl 6 aqueous solution and Bi(NO 3 ) 3 The aqueous solution is mixed, the mixture carrier contains ZSM-5 zeolite and gamma-alumina as a binder, the silica / alumina molar ratio of the zeolite is 30, in addition to platinum and bismuth, ZSM-5 in the carrier The amount of zeolite is 75% by weight. The supported amounts of platinum and bismuth were 0.03 parts by weight and 0.5 parts by weight, respectively, relative to 100 parts by weight of ZSM-5 zeolite and the binder in total. The supported mixture carrier was molded to have a diameter of 2 mm and a length of 10 mm, dried at 120° C. for 3 hours, and then calcined at 500° C. for 3 hours, thereby preparing a catalyst. The prepared catalyst is used for hydrocarbon mixture reaction. The reaction conditions and reaction results are shown in Table 1 below.

Embodiment 2

[0070] mix carrier with H 2 PtCl 6 aqueous solution and BiCl 3 The aqueous solution is mixed, the mixture carrier contains ZSM-5 zeolite and gamma-alumina as a binder, the silica / alumina molar ratio of the zeolite is 30, in addition to platinum and bismuth, ZSM-5 in the carrier The amount of zeolite is 75% by weight. The supported amounts of platinum and bismuth were 0.03 parts by weight and 0.25 parts by weight, respectively, relative to 100 parts by weight of the ZSM-5 zeolite and the binder in total. The loaded mixture carrier was molded to have a diameter of 2 mm and a length of 10 mm, dried at 120° C. for 3 hours, and then calcined at 500° C. for 3 hours, thereby preparing a catalyst. The prepared catalyst is used for hydrocarbon mixture reaction. The reaction conditions and reaction results are shown in Table 1 below.

Embodiment 3

[0072] mix carrier with H 2 PtCl 6 aqueous solution and BiCl 3 The aqueous solution is mixed, and the mixture carrier contains ZSM-5 zeolite with a silica / alumina molar ratio of 30, mordenite with a silica / alumina molar ratio of 20 and gamma-alumina as a binder, In addition to platinum and bismuth, the amounts of ZSM-5 zeolite and mordenite in the support were 50% by weight and 25% by weight, respectively. The supported amounts of platinum and bismuth were 0.03 parts by weight and 0.25 parts by weight, respectively, relative to 100 parts by weight of ZSM-5 zeolite, mordenite and binder in total. The supported mixture carrier was molded to have a diameter of 2 mm and a length of 10 mm, dried at 120° C. for 3 hours, and then calcined at 500° C. for 3 hours, thereby preparing a catalyst. The prepared catalyst is used for hydrocarbon mixture reaction. The reaction conditions and reaction results are shown in Table 1 below.

technical field

[0001] The invention relates to a method for preparing aromatic hydrocarbons and liquefied petroleum gas from hydrocarbon mixtures. More specifically, the present invention relates to a process for the conversion of non-aromatic hydrocarbon compounds in hydrocarbon feedstock mixtures into gaseous substances rich in liquefied petroleum gas by hydrocracking in the presence of platinum / bismuth supported zeolite-based catalysts; and A method of converting aromatic hydrocarbon compounds into oily components including benzene, toluene and xylene through dealkylation / transalkylation. Background technique

[0002] Generally, aromatics are obtained by separating raw materials containing a large amount of aromatic compounds (such as reformed oil obtained by catalytic reforming and pyrolysis gasoline obtained by naphtha cracking) from non-aromatic hydrocarbons by solvent extraction . According to different boiling points, the aromatic hydrocarbon mixture obtained in t...

Examples

Embodiment 1

[0068] mix carrier with H 2 PtCl 6 aqueous solution and Bi(NO 3 ) 3 The aqueous solution is mixed, the mixture carrier contains ZSM-5 zeolite and gamma-alumina as a binder, the silica / alumina molar ratio of the zeolite is 30, in addition to platinum and bismuth, ZSM-5 in the carrier The amount of zeolite is 75% by weight. The supported amounts of platinum and bismuth were 0.03 parts by weight and 0.5 parts by weight, respectively, relative to 100 parts by weight of ZSM-5 zeolite and the binder in total. The supported mixture carrier was molded to have a diameter of 2 mm and a length of 10 mm, dried at 120° C. for 3 hours, and then calcined at 500° C. for 3 hours, thereby preparing a catalyst. The prepared catalyst is used for hydrocarbon mixture reaction. The reaction conditions and reaction results are shown in Table 1 below.

Embodiment 2

[0070] mix carrier with H 2 PtCl 6 aqueous solution and BiCl 3 The aqueous solution is mixed, the mixture carrier contains ZSM-5 zeolite and gamma-alumina as a binder, the silica / alumina molar ratio of the zeolite is 30, in addition to platinum and bismuth, ZSM-5 in the carrier The amount of zeolite is 75% by weight. The supported amounts of platinum and bismuth were 0.03 parts by weight and 0.25 parts by weight, respectively, relative to 100 parts by weight of the ZSM-5 zeolite and the binder in total. The loaded mixture carrier was molded to have a diameter of 2 mm and a length of 10 mm, dried at 120° C. for 3 hours, and then calcined at 500° C. for 3 hours, thereby preparing a catalyst. The prepared catalyst is used for hydrocarbon mixture reaction. The reaction conditions and reaction results are shown in Table 1 below.

Embodiment 3

[0072] mix carrier with H 2 PtCl 6 aqueous solution and BiCl 3 The aqueous solution is mixed, and the mixture carrier contains ZSM-5 zeolite with a silica / alumina molar ratio of 30, mordenite with a silica / alumina molar ratio of 20 and gamma-alumina as a binder, In addition to platinum and bismuth, the amounts of ZSM-5 zeolite and mordenite in the support were 50% by weight and 25% by weight, respectively. The supported amounts of platinum and bismuth were 0.03 parts by weight and 0.25 parts by weight, respectively, relative to 100 parts by weight of ZSM-5 zeolite, mordenite and binder in total. The supported mixture carrier was molded to have a diameter of 2 mm and a length of 10 mm, dried at 120° C. for 3 hours, and then calcined at 500° C. for 3 hours, thereby preparing a catalyst. The prepared catalyst is used for hydrocarbon mixture reaction. The reaction conditions and reaction results are shown in Table 1 below.

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