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Method of preparing butadiene from gasoline

A technology for butadiene and gasoline is applied in the field of preparing butadiene to achieve the effects of reduced energy consumption and low energy consumption

Active Publication Date: 2015-03-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the processes according to these patent applications still only achieve yields of 5-7% by weight of butadiene

Method used

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  • Method of preparing butadiene from gasoline
  • Method of preparing butadiene from gasoline

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0055] Preparation of Pt / γAl 2 o 3 Cyclization catalyst

[0056] γAl in strip form 2 o 3 As a carrier, impregnate the carrier in 0.03mol / L H 2 PtCl 6 In the aqueous solution, the impregnated carrier was taken out and dried in the air, and then calcined in a muffle furnace at 823K for 3 h to obtain a Pt / γAl with a Pt content of 0.5 wt% and a Cl content of 1.09 wt%. 2 o 3 Cyclization catalyst.

preparation example 2

[0058] Preparation of Pt-Re / mordenite cyclization catalyst

[0059] Immerse mordenite (silica-alumina molar ratio is 10) in 0.1mol / L perrhenic acid aqueous solution at 80°C, then dry at 110°C for 3h, and then calcined at 500°C for 4h to obtain a Re content of 0.46% by weight of Re / mordenite; then, the Re / mordenite was impregnated in 0.02mol / L of H 2 PtCl 6 In aqueous solution, calcined at 600 °C for 4 hours to obtain a Pt-Re / mordenite cyclization catalyst with a Pt content of 0.21 wt%, which contained 0.46 wt% Re, 0.21 wt% Pt and 1.08 wt% Cl .

preparation example 3

[0061] Preparation of Mo / HZSM-5 Cyclization Catalyst

[0062] The ZSM-5 raw powder (purchased from Nankai University Chemical Plant, the molar ratio of silicon to aluminum is 25) and NH 4 Cl solution was ion-exchanged to obtain HZSM-5 molecular sieve; then 0.1g of MoO 3 Dissolve in 5ml of ammonia water with a concentration of 20% by weight, then add HZSM-5 molecular sieve into it, then add 7ml of water, close the lid tightly, and place the reaction kettle in an oven at 240°C for 8 hours, then loosen slightly Covered and left to stand for 12 hours, a Mo / HZSM-5 cyclization catalyst with a Mo content of 6% by weight and a Cl content of 1.1% by weight was obtained.

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Abstract

The invention discloses a method of preparing butadiene from gasoline. The method comprises following steps: (1) in the presence of a cyclization catalyst, subjecting gasoline to carry out cyclization reactions so as to obtain a hydrocarbon mixture containing six-membered ring hydrocarbon; (2) in the presence of a hydrogenation catalyst, subjecting the hydrocarbon mixture containing six-membered ring hydrocarbon to carry out hydrogenation reactions so as to obtain a hydrocarbon mixture containing cyclohexane and / or alkyl cyclohexane; (3) taking the hydrocarbon mixture containing cyclohexane and / or methyl cyclohexane as at least part of a cracking raw material to carry out steam cracking reactions. The method provided by the invention of preparing butadiene from a gasoline has a high yield of butadiene, and a low yield of methane, and thus the energy consumption of the cooling box during the separation process of cracking gas is reduced.

Description

technical field [0001] The present invention relates to a method for preparing butadiene from gasoline. Background technique [0002] Butadiene usually refers to 1,3-butadiene, also known as vinyl ethylene, which is an important petrochemical basic raw material next to ethylene and propylene. Butadiene is mainly used in synthetic rubber and resins, such as polybutadiene rubber (BR), styrene-butadiene rubber (SBR), nitrile rubber (NBR), styrene-butadiene polymer latex, styrene thermoplastic elastomer (SBC) and Acrylonitrile-butadiene-styrene (ABS) resin. In addition, butadiene can also be used to produce organic chemical products such as adiponitrile, hexamethylenediamine, nylon-66, and 1,4-butanediol, which are widely used in many fields. [0003] For the preparation of butadiene, the traditional method is to steam crack raw materials such as light hydrocarbons, naphtha, and hydrogenated tail oil. However, the main products in the steam cracking process are ethylene, prop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/167C07C4/06
Inventor 王国清郭莹杜志国石莹李蔚张兆斌
Owner CHINA PETROLEUM & CHEM CORP