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Organic chlorine removal catalyst and preparation method and application thereof

A technology for removing organochlorine and catalysts, which is applied in the field of organochlorine removal catalysts and its preparation, can solve the problems of undisclosed and more scientific removal, achieve long service life, high removal precision, and reduce the effect of total chlorine at the outlet

Pending Publication Date: 2022-04-19
CNOOC TIANJIN CHEM RES & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Since the molecules of low-carbon hydrocarbons such as propylene and isobutylene are small, which are similar to the molecular size of organochlorine, there is no more scientific and easy-to-operate method for the removal of organochlorine in propylene.

Method used

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  • Organic chlorine removal catalyst and preparation method and application thereof
  • Organic chlorine removal catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) 10g of activated alumina, 65g of ZSM-5 molecular sieve, 15g of coconut shell activated carbon, and 10g of magnesium aluminum hydrotalcite are mixed evenly and then ground into particles with a particle size of less than 1000 mesh;

[0036] (2) Add an appropriate amount of scallop powder, water, and sodium hydroxide solution to the mixture particles obtained in step (1), knead after mixing, and extrude into strips with a diameter of 3-5mm, dry at 120°C for 4 hours, and then dry at 500°C ℃ roasting for 4 hours to obtain the deorganochlorination catalyst TL-1.

[0037] (3) Analyze physical properties such as bulk specific gravity, piezometric strength, water absorption, X-ray fluorescence spectrum, physical adsorption, and X-ray diffraction of the prepared organochlorine removal agent, and test the physical property indicators of the prepared organochlorine removal catalyst. The physical data are shown in Table 1. It was then placed in a fixed-bed micro-reaction evalu...

Embodiment 2

[0039] (1) 5g of activated alumina, 75g of ZSM-5 molecular sieve, 10g of coconut shell activated carbon, and 10g of magnesium aluminum hydrotalcite are mixed evenly and then ground into particles with a particle size of less than 1000 mesh;

[0040] (2) Add an appropriate amount of carboxymethyl cellulose and 3% dilute nitric acid, cesium nitrate, copper nitrate solution to the mixture particles obtained in step (1), knead after mixing, extrude and form, and the diameter is 3-5mm. Dry at 120°C for 2 hours, and then bake at 500°C for 4 hours to obtain the catalyst for removing organochlorine TL-2.

[0041] (3) Analyze physical properties such as bulk specific gravity, piezometric strength, water absorption, X-ray fluorescence spectrum, physical adsorption, and X-ray diffraction of the prepared organochlorine removal agent, and test the physical property indicators of the prepared organochlorine removal catalyst. The physical data are shown in Table 1. It was then placed in a f...

Embodiment 3

[0044] (1) 30g of activated alumina, 45g of ZSM-35 molecular sieve, 20g of coconut shell activated carbon, and 5g of magnesium aluminum hydrotalcite are mixed evenly and then ground into particles with a particle size of less than 1000 mesh;

[0045] (2) Add an appropriate amount of carboxymethyl cellulose and 3% dilute nitric acid and cerium nitrate solution to the mixture particles obtained in step (1), knead after mixing, extrude and form, with a diameter of 3-5mm, and dry at 120°C 2h, and then calcined at 500°C for 2h to obtain organochlorine removal catalyst TL-3.

[0046] (3) Analyze physical properties such as bulk specific gravity, piezometric strength, water absorption, X-ray fluorescence spectrum, physical adsorption, and X-ray diffraction of the prepared organochlorine removal agent, and test the physical property indicators of the prepared organochlorine removal catalyst. The physical data are shown in Table 1. It was then placed in a fixed-bed micro-reaction eval...

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Abstract

The invention discloses a preparation method and application of an organochlorine removal catalyst. The organic chlorine removal catalyst comprises 1%-35% of activated aluminum oxide, 1%-25% of activated carbon, 1%-15% of hydrotalcite, 30%-80% of molecular sieves and the balance of auxiliaries. The catalytic promoter is one or more of Na, Cs, Ca, Cu, Zn, Fe and Ce. The content of the components is 0.1%-10%. The organic chlorine removal catalyst has a pore volume of 0.5-1.0 cm < 3 > / g and a specific surface area of 200-600 m < 2 > / g. The organic chlorine removal catalyst has an obvious removal effect on organic chlorine impurities such as chloromethane, dichloromethane, chloroethane, dichloroethane and the like in chemical raw materials and products. Organic chlorine can be removed to 0.1 ppm or below, and meanwhile, inorganic chlorine in the raw materials can be reduced to 0.1 ppm or below. The organic chlorine removal catalyst is large in organic chlorine capacity, can be regenerated during adsorption saturation, is good in regeneration effect, and can recover 99% of the organic chlorine capacity. The regeneration method is simple, and the requirements of low-carbon hydrocarbon purification and organic chlorine removal in the chemical industry are effectively met.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a catalyst for removing organic chlorine and its preparation method and application. Background technique [0002] In recent years, the domestic propylene industry has developed rapidly. In 2019, the new domestic propylene production capacity reached 3.66Mt, a year-on-year increase of 10.6%. Among the new production capacity, the proportion of traditional petrochemical routes has dropped significantly, and the production capacity of emerging processes has grown rapidly, accounting for 81.15% of the new production capacity. At present, the development trend of diversification and lightening of global ethylene raw materials is obvious. The use of light hydrocarbons such as ethane to produce ethylene will become a trend. The growth rate of propylene production by-product of naphtha cracking in the traditional route will slow down. Propane dehydrogenation (PDH) or It will become the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J29/46B01J29/65C07C7/148C07C11/06C07C11/08C07C11/09
CPCB01J29/40B01J29/655B01J29/46C07C7/14858C07C7/1485C07C7/148B01J2229/20B01J2229/18C07C11/06C07C11/08C07C11/09Y02P20/52
Inventor 吴同旭李晓云郭秋双蔡哲蔡奇孟广莹孙彦民于海斌
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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