A kind of method for producing propane by conversion of hydrogenated light hydrocarbons

A technology for hydrogen conversion and light hydrocarbons, which is applied in chemical instruments and methods, hydrocarbon cracking to produce hydrocarbons, hydrocarbons, etc. Long-term stable operation, excellent product quality, and the effect of reducing dry gas yield

Active Publication Date: 2022-07-29
洛阳市科创石化科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The existing propane production process usually adopts fixed bed reactor and non-hydrogen process, which has defects such as short catalyst one-way cycle, high reaction temperature, high dry gas yield, and low conversion rate of raw materials, which will undoubtedly lead to product added value reduction, high energy consumption of production equipment, and the production of propane by the hydrogenation process has not yet been reported

Method used

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  • A kind of method for producing propane by conversion of hydrogenated light hydrocarbons

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Experimental program
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Effect test

Embodiment 1

[0049] The present embodiment describes the process flow of the present invention in conjunction with the accompanying drawings, the details are as follows:

[0050] 1) The light hydrocarbon raw material (27), fresh hydrogen (26), circulating hydrogen and circulating light hydrocarbon components are heated to the reaction temperature in the raw material heating furnace (2), and then enter the reactor (3), and the reaction is carried out under the condition of an acidic catalyst , to get the reaction product.

[0051] 2) The reaction product passes through the raw material-reaction product heat exchanger (1) and the product cooler (5) respectively, and then enters the gas-liquid separation tank (4) after cooling down.

[0052]3) The light components in the gas-liquid separation tank enter from the bottom of the absorption tower (6), the top components of the absorption tower enter from the bottom of the reabsorption tower (24), and the top components of the reabsorption tower e...

Embodiment 2

[0056] Using 85wt% isobutane and 15wt% n-butane as light hydrocarbon raw materials, KCA-BL type light hydrocarbon upgrading catalyst to propane, in a fixed bed reactor, reaction starting temperature 320 ℃, reaction pressure 1.75MPa, light hydrocarbon raw material Mass airspeed 0.4h -1 , C4 full cycle, hydrogen-oil ratio of 150:1 to carry out the reaction.

[0057] The results show that the weighted average data in the whole cycle are: the conversion rate of butane per pass is 75.2%, the mass ratio of circulating C4 to fresh butane is 1:3, the dry gas yield is 2.38wt%, and the propane yield is 84.41wt% %, the yield of high-octane gasoline is 13.21%, and the one-way operation period is 110 days.

Embodiment 3

[0059] Using 85wt% isobutane and 15wt% n-butane as light hydrocarbon raw materials, KCA-BL type light hydrocarbon upgrading catalyst to propane, in a fixed bed reactor, reaction starting temperature 290 ℃, reaction pressure 1.75MPa, light hydrocarbon raw material Mass airspeed 0.4h -1 , C4 full cycle, hydrogen-oil ratio of 50:1 to carry out the reaction.

[0060] The results show that the weighted average data in the whole cycle are as follows: the conversion rate of butane in one pass is 73.8%, the mass ratio of circulating C4 to fresh butane is 1:2.3, the yield of dry gas is 2.58wt%, and the yield of propane is 81.41%. wt%, the yield of high-octane gasoline is 16.01%, and the single-pass operation period is 88 days.

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Abstract

The invention discloses a method for producing propane by hydrogen conversion of light hydrocarbons. The light hydrocarbon raw material, hydrogen-rich gas and circulating light hydrocarbons are heated to the reaction temperature, and catalytic cracking reaction occurs under the condition of an acidic catalyst. The reaction products are cooled and fractionated to obtain dry gas, propane, and aromatic gasoline components respectively. Unreacted light components are obtained. The hydrocarbon feedstock, hydrogen-rich gas and recycle light hydrocarbons are returned to the reactor to continue the reaction. On the one hand, the present invention uses light alkanes as raw materials, which can effectively utilize a large amount of excess light alkanes in refineries; Increase feedstock conversion and propane yield.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and in particular relates to a method for producing propane by converting light hydrocarbons near hydrogen. Background technique [0002] In recent years, propane dehydrogenation (PDH) projects have sprung up, the production capacity of propylene in this process has gradually increased, and the source of raw propane has gradually become the focus of enterprises. At present, coastal cities can import from the United States, the Middle East, etc., but the first thing to consider for new PDH projects in the mainland is the source and transportation of propane. Domestic propane mainly comes from refinery liquefied gas or oilfield associated gas. The propane content is low and the storage is scattered, and its sulfur content is also high. [0003] At present, the domestic liquefied petroleum gas market is overcapacity, and the consumption structure of civil liquefied gas resources is shifting to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C4/06C07C7/11C07C7/00C07C7/04C07C9/08
CPCC07C4/06C07C7/11C07C7/00C07C7/04C07C2529/80C07C9/08
Inventor 王银亮滕刘中娄青青马余璐王近近李宗杰史杰雷龚旭辉闫飞
Owner 洛阳市科创石化科技开发有限公司
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