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A kind of processing method of cracking gas produced by producing low-carbon olefins

A low-carbon olefin and treatment method technology, which is applied in the direction of combustion method, hydrocarbon oil treatment, separation method, etc., can solve problems such as potential safety hazards, achieve effective treatment, avoid potential safety hazards, and be beneficial to environmental protection

Active Publication Date: 2018-07-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of potential safety hazards due to the direct combustion of cracked gas and provide a novel treatment method for cracked gas produced in the production of low-carbon olefins

Method used

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  • A kind of processing method of cracking gas produced by producing low-carbon olefins
  • A kind of processing method of cracking gas produced by producing low-carbon olefins
  • A kind of processing method of cracking gas produced by producing low-carbon olefins

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preparation example Construction

[0037] Can be commercially available as supported Ni series catalyst of the present invention, also can make by the conventional method of this area, and its preparation method preferably comprises:

[0038] (a) Coating the slurry of pseudo-boehmite on the honeycomb cordierite (honeycomb cordierite ceramics can be used), drying and firing to obtain the honeycomb cordierite with aluminum-containing coating as the carrier ;

[0039] (b) Coating the solution of the nickel-containing compound and the molybdenum-containing compound on the above-mentioned carrier, drying and calcining, so as to prepare a supported Ni-based catalyst.

[0040] Wherein, the nickel-containing compound may be, for example, one or more of nickel nitrate, nickel sulfate, nickel carbonate and nickel chloride. The molybdenum-containing compound may be, for example, ammonium molybdate. The solvent of the solution used may be one or more of water, methanol, ethanol, ethylene glycol and isopropanol. It shoul...

preparation example 1

[0102] This preparation example is used to illustrate the hydrogenation catalyst used in the present invention.

[0103] (a) 150g of pseudo-boehmite powder (purchased from Zibo Taiguang Chemical Co., Ltd. GL-2 brand) and 1000g of water were ball milled at a speed of 50rpm in a ball mill (Nanjing Laibu Technology Industrial Co., Ltd. QM model) for 2h to obtain Suspended slurry, the slurry was coated on 1000g honeycomb cordierite ceramics (purchased from Jiangxi Xingfeng Chemical Packing Company square hole carrier) by dipping method, and dried at 120°C for 12h, and extruded extruded in the machine, and then calcined at 600°C for 6 hours to obtain a γ-Al 2 o 3 Coated honeycomb cordierite support.

[0104] (b) The aqueous solution containing 25% by weight of nickel nitrate and 15% by weight of ammonium molybdate is spray-coated on the carrier obtained in step (a), then dried at 120°C for 4h, and then dried at 500°C Roasting 4h, thereby obtains the hydrogenation catalyst C1 tha...

preparation example 2

[0106] This preparation example is used to illustrate the supported Pd-Pt catalyst used in the present invention.

[0107] (a) 100g of pseudo-boehmite powder (purchased from Zibo Taiguang Chemical Co., Ltd. GL-1 brand) and 400g of water were ball milled at a speed of 50rpm in a ball mill (Nanjing Laibu Technology Industrial Co., Ltd. QM model) for 2h to obtain Suspended slurry, the slurry was coated on 1000g honeycomb cordierite ceramics (purchased from Jiangxi Xingfeng Chemical Packing Co. extruded in a bar machine, and then calcined at 700°C for 6h to obtain a γ-Al 2 o 3 Coated honeycomb cordierite support.

[0108] (b) immersing the carrier obtained in step (a) in an aqueous solution containing 1% by weight of chloroplatinic acid and 1% by weight of palladium chloride for 12h, then drying at 120°C for 4h, and then calcining at 500°C for 4h, Thereby making Pd / Pt-Al 2 o 3 Catalyst C4, based on the total amount of the catalyst, the content of Pd element is 0.5% by weight,...

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Abstract

The invention relates to a treatment method of cracked gas produced by the production of low-carbon olefins. The method comprises the following steps: 1, under the condition of non-selective hydrogenation, at the presence of a hydrogenation catalyst, carrying out non-selective hydrogenation treatment on the cracked gas, and converting alkine and dialkene in the cracked gas into monoolefine and / or alkane, wherein the hydrogenation catalyst is a supported type Ni series catalyst using Ni and Mo as metal active components; and 2, enabling the cracked gas which is hydrogenated at the step 1 to carry out combustion reaction with air under the presence of a supported type Pd-Pt series catalyst, wherein the supported type Pd-Pt series catalyst uses Pd and Pt as metal active components. The method provided by the invention can better avoid the problem that the direction combustion of the cracked gas has potential safety danger, and the method is particularly suitable for petrochemical small-scale and pilot tests and is favorable to environmental protection.

Description

technical field [0001] The invention relates to a treatment method for cracked gas produced by producing light olefins. Background technique [0002] Waste gases such as unsaturated olefins or their hydrocarbon derivatives produced in refineries and polyolefins are often comprehensively recycled or even converted into other products with higher value due to their high economic value, such as the cracking of existing public reports Gas hydrogenation catalytic technology often adopts a selective hydrogenation process at a lower temperature (for example, about 40-90°C) to remove alkynes as much as possible, which can minimize the loss of olefins and butadiene, which can facilitate cracking Gas recovery of organic gases such as olefins. However, petrochemical small-scale and pilot-scale test devices produce small and scattered VOCs (volatile organic compounds), which lack economic benefits and are difficult to recycle and comprehensively utilize. At the same time, the treatment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G70/00C10G70/02F23G7/07B01D53/86
Inventor 王育刘小波张永刚王国清刘海江
Owner CHINA PETROLEUM & CHEM CORP
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