Utilization method for hydrocarbon fuel gas rich in alkyne

A technology for hydrocarbon fuels and alkynes, applied in the fields of hydrogenation to hydrocarbons, organic chemistry, etc., can solve problems such as ineffective utilization and burning, improve operability and safety, improve overall efficiency, and avoid waste of resources Effect

Active Publication Date: 2015-06-10
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem solved by the present invention is the problem that the hydrocarbon fuel gas rich in alkynes in the existing butadiene plant is sent to the torch for burning and cannot be effectively utilized, and a new hydrocarbon fuel gas rich in alkyne is provided How to use fuel gas

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  • Utilization method for hydrocarbon fuel gas rich in alkyne

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Effect test

Embodiment 1

[0019] according to figure 1 As shown, adopting the technical process of the present invention, the feed is a hydrocarbon material rich in alkynes, and a nickel-palladium-copper multi-metal catalyst is used in a selective hydrogenation reactor; the reaction temperature is 45°C, the reaction pressure is 2.0MPa, and the hydrocarbon material The volumetric space velocity is 2.5 hours-1, the molar ratio of hydrogen to alkyne is 1.5:1, and the first-stage hydrogenation reactor is a bubbling bed. The second-stage selective hydrogenation reactor adopts nickel-molybdenum multi-metal catalyst; the reaction temperature is 160°C, the reaction pressure is 2.5MPa, the volume space velocity of hydrocarbon material is 1 hour-1, and the molar ratio of hydrogen to alkyne is 450:1. The stage hydrogenation reactor is a fixed bed,

[0020] The test proves that the alkyne conversion rate is about 98.1%, and the composition of the main components in and out is shown in the following table 1:

[0...

Embodiment 2

[0023] according to figure 1 As shown, adopting the technological process of the present invention, the feedstock is a hydrocarbon material rich in alkynes, and a nickel-palladium-copper multi-metal catalyst is used in a selective hydrogenation reactor; the reaction temperature is 67°C, the reaction pressure is 2.0MPa, and the hydrocarbon material The volumetric space velocity is 4 hours-1, the molar ratio of hydrogen to alkyne is 3.5:1, and the first-stage hydrogenation reactor is a bubbling bed. The second-stage selective hydrogenation reactor adopts nickel-molybdenum multi-metal catalyst; the reaction temperature is 180°C, the reaction pressure is 2.5MPa, the volume space velocity of hydrocarbon material is 2 hours-1, and the molar ratio of hydrogen to alkyne is 550:1. The stage hydrogenation reactor is a fixed bed.

[0024] The test proves that the alkyne conversion rate is about 97.5%, and the composition of the main components in and out is shown in Table 2 below:

[0...

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Abstract

The invention relates to a utilization method for hydrocarbon fuel gas rich in alkyne, which mainly solves the problem that the hydrocarbon fuel gas rich in alkyne in a butadiene device cannot be used effectively due to being sent to a torch to be burned up. According to the utilization method for hydrocarbon fuel gas rich in alkyne, gaseous phase hydrocarbon fuel gas is absorbed as a liquid phase through the adoption of a solvent, the absorption liquid and hydrogen are mixed and then enter into a one-stage process catalysis selectivity hydrogenation reactor, under multiple metals catalyst reaction of nickel, palladium, copper and silver, alkyne selective hydrogenation reaction is carried out, the alkyne is changed into diolefin through hydrogenation, the product enters into an analysis tower so as to separate the solvent and C4 olefin, the material at the bottom of the tower returns back to an absorption tower for recycling, the material at the top of the tower and hydrogen are mixed and then enter into a two-stage process catalysis hydrogenation reactor, under the metal catalyst reaction of nickel and molybdenum, the diolefin is changed into monoolefine through hydrogenation, then the monoolefine is sent to a butene-1 device for separation so as to obtain the product of butane-1. The utilization method better solves the problem, and can be widely applied to recycling hydrocarbon fuel gas and industrial increase production of butene-1.

Description

technical field [0001] The invention relates to a utilization method of residual alkyne-rich hydrocarbon fuel gas in a butadiene extraction device. The present invention absorbs the residual alkyne-rich hydrocarbon fuel gas in a butadiene extraction unit through solvent absorption, performs selective hydrogenation under the action of a catalyst, and recovers butene-1 and other monoenes in the product. Background technique [0002] Butene-1 is an important chemical raw material with relatively active chemical properties. It is an important component of C4 in refineries and C4 hydrocarbons in cracking. High-purity butene-1 is mainly used for copolymerization of linear low-density polyethylene (LLDPE) monomer, poly-1-butene plastic, and high-density polyethylene (HDPE). From the perspective of Asia, butene-1, one of the raw materials for LLDPE production, is seriously in short supply. There are only a few butene-1 producers in Asia that sell products to the outside world. Wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/08C07C5/05C07C5/09
Inventor 钱宏义何志卢和泮
Owner CHINA PETROLEUM & CHEM CORP
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