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Method for preparing light olefins in fixed bed

A low-carbon olefin and fixed-bed technology, applied in chemical instruments and methods, from carbon oxides to hydrocarbons, hydrocarbons, etc., can solve the problems of low selectivity of low-carbon olefins, low CO conversion rate, etc.

Active Publication Date: 2021-08-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the problem of low CO conversion rate and low selectivity of low-carbon olefins in the product in the fixed-bed production technology of low-carbon olefins in the prior art, and provides a method for fixed-bed production of low-carbon olefins. When it is used in the reaction of producing low-carbon olefins in a fixed bed, it has the advantages of high conversion rate of CO and high selectivity of low-carbon olefins in the product

Method used

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  • Method for preparing light olefins in fixed bed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] 1. Preparation of the mixture

[0059] Weigh 100 parts by weight of kalephine (KAlSiO 4 ), and 4% hydroxypropyl methylcellulose powder according to the total amount of raw materials added by weight, was ground and mixed in a ball mill for 6 hours to obtain material A; Add deionized water to the milled material A, knead until soft, and obtain material B; send the kneaded material B into the extruder, make a strip with a diameter of 5mm, and cut it into a strip with a length of 20mm. Columnar shape, after natural drying, put it into the drying equipment, dry at 110°C for 12 hours to obtain material C; send the dried material C into a high-temperature furnace, calcined at 1200°C for 6.0 hours, after cooling, crush and sieve And sieve the 40-80 mesh particles to obtain the mixture D.

[0060] 2. Preparation of catalyst

[0061] Weigh equivalent to 20 parts by weight Fe 2 o 3 of ferric nitrate nonahydrate, equivalent to 15 parts by weight Bi 2 o 3 Bismuth nitrate pent...

Embodiment 2

[0074] 1. Preparation of the mixture

[0075] Weigh 100 parts by weight of kalephine (KAlSiO 4 ), and 4% hydroxypropyl methylcellulose powder according to the total amount of raw materials added by weight, was ground and mixed in a ball mill for 6 hours to obtain material A; Add deionized water to the milled material A, knead until soft, and obtain material B; send the kneaded material B into the extruder, make a strip with a diameter of 5mm, and cut it into a strip with a length of 20mm. Columnar shape, after natural drying, put it into the drying equipment, dry at 110°C for 12 hours to obtain material C; send the dried material C into a high-temperature furnace, calcined at 1200°C for 6.0 hours, after cooling, crush and sieve And sieve the 40-80 mesh particles to obtain the mixture D.

[0076] 2. Preparation of catalyst

[0077] Weigh equivalent to 20 parts by weight Fe 2 o 3 of ferric nitrate nonahydrate, equivalent to 15 parts by weight Er 2 o 3 Erbium nitrate penta...

Embodiment 3

[0090] 1. Preparation of the mixture

[0091]Take magnesium carbonate equivalent to 100 parts by weight of MgO, and add 4% hydroxypropyl methylcellulose powder according to the total amount of the above raw materials, and grind and mix them in a ball mill for 6 hours to obtain material A; Add 7% deionized water to the milled and mixed material A in the total amount, and knead until soft to obtain material B; the kneaded material B is sent into the extruder to make a 5mm diameter Long strips were cut into columnar shapes with a length of 20mm. After drying naturally, they were sent to drying equipment and dried at 110°C for 12 hours to obtain material C; the dried material C was sent to a high-temperature furnace and dried at 1200°C Calcined for 6.0 hours, after cooling, crushed and sieved to collect 40-80 mesh particles to obtain mixture D.

[0092] 2. Preparation of catalyst

[0093] Weigh equivalent to 20 parts by weight Fe 2 o 3 of ferric nitrate nonahydrate, equivalent...

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Abstract

The invention relates to a method for preparing light olefins in a fixed bed, and mainly solves the problems of low CO conversion rate and low selectivity of light olefins in the reaction of synthesis gas to light olefins existing in the prior art. The present invention adopts the method for preparing low-carbon olefins in a fixed bed, comprising using synthesis gas as a raw material, and the raw material is contacted and reacted with a catalyst to generate carbon-containing olefins. 2 ~C 4 olefins, the catalyst includes the following components in parts by weight: a) 5 to 40 parts of iron series elements or their oxides; b) 1 to 25 parts including at least one element in the VA group or their oxides; c) The technical proposal of 40-90 parts of a mixture of kalephine and at least one of magnesia and alumina sintered at high temperature, which solves this problem well and can be used in the industrial production of fixed-bed preparation of low-carbon olefins .

Description

technical field [0001] The invention relates to a method for preparing light olefins in a fixed bed. Background technique [0002] Low-carbon olefins refer to olefins with carbon atoms less than or equal to 4. Low-carbon olefins represented by ethylene and propylene are very important basic organic chemical raw materials. With the rapid growth of my country's economy, the supply of low-carbon olefins has been in short supply for a long time. At present, the production of low-carbon olefins mainly adopts the petrochemical route of cracking light hydrocarbons (ethane, naphtha, light diesel oil). Due to the increasing shortage of global oil resources and the long-term high price of crude oil, the development of low-carbon olefins industry only relies on oil The tubular cracking furnace process with light hydrocarbons as raw materials will encounter more and more raw material problems, and the production process and raw materials of low-carbon olefins must be diversified. One-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/04C07C11/04C07C11/06C07C11/08B01J23/843B01J23/83
CPCB01J23/83B01J23/8437C07C1/044C07C2523/83C07C2523/843C07C11/04C07C11/06C07C11/08Y02P20/52
Inventor 李剑锋陶跃武宋卫林庞颖聪
Owner CHINA PETROLEUM & CHEM CORP