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A kind of normal temperature gas phase dechlorination agent and its preparation method and application

A dechlorination agent and fly ash technology, applied in the field of dechlorination, can solve the problem of small penetration chlorine capacity, achieve large penetration chlorine capacity, improve dechlorination effect, and good synergistic effect

Active Publication Date: 2019-12-24
SHENYANG SANJUKAITE CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the existing CuO-MgO based dechlorination agent with small penetration chlorine capacity at normal temperature, and to provide a dechlorination agent with high dechlorination precision and high penetration chlorine capacity at normal temperature. Agents and their preparation methods and applications

Method used

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  • A kind of normal temperature gas phase dechlorination agent and its preparation method and application
  • A kind of normal temperature gas phase dechlorination agent and its preparation method and application

Examples

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Effect test

Embodiment 1

[0029] Preparation of alkaline calcium-based bentonite: Take 18.5g of activated clay, 6.5g of calcium oxide and 56ml of deionized water, mix them in a conical flask, place them in a constant temperature heating magnetic stirrer at 60°C and stir for 3 hours, filter with suction, and use the filter cake Wash with deionized water, dry quickly at 120°C, and crush the dried filter cake through a 200-mesh sieve to obtain alkaline calcium-based bentonite.

[0030] Alkali-modified fly ash: take 15g of fly ash and put it in a conical flask, add 60ml of 1.2mol / L alkali modifier sodium hydroxide solution, shake it on a vibrating screen for 1.5h, let it stand for 24h, then carry out solid-liquid separation , the resulting solid was placed in 30ml of 95% ethanol solution and placed for 2h, washed with water until neutral, dried at 110°C for 12h, crushed through a 200-mesh sieve to obtain alkali-modified fly ash.

[0031] Weigh 25g of calcium oxide, 15g of copper oxide, 10g of alkaline calc...

Embodiment 2

[0035] The preparation method of the basic calcium-based bentonite is the same as in Example 1, and finally 40 g of the basic calcium-based bentonite is obtained.

[0036] Alkali-modified fly ash: take 10g of fly ash and put it in a conical flask, add 1.3mol / L alkali modifier sodium hydroxide solution 15ml, vibrate on a oscillating screen for 1.5h, let it stand for 24h, then carry out solid-liquid separation , the obtained solid was placed in 20ml of 95% ethanol solution for 2h, washed with water until neutral, dried at 110°C for 12h, crushed through a 200-mesh sieve to obtain alkali-modified fly ash.

[0037] Weigh 54.3g of calcium hydroxide, 10g of nano-copper oxide (the particle size is 40nm~160nm, accounting for more than 95%, and the specific surface area is 50~80cm 2 / g, bulk density is 0.7±0.02g / cm 3 ), 40 g of alkaline calcium-based bentonite and 10 g of alkali-modified fly ash were mixed for 25 min, 50.5 g of 2.5 wt % sodium metaaluminate was added and mixed for 15 min...

Embodiment 3

[0041] The preparation method of the basic calcium-based bentonite is the same as in Example 1, and finally 10 g of the basic calcium-based bentonite is obtained.

[0042] Alkali-modified fly ash: Take 40g of fly ash and put it in a conical flask, add 50ml of 1.4mol / L alkali modifier sodium hydroxide solution, shake it on a vibrating screen for 1.5h, let it stand for 24h, then carry out solid-liquid separation , the resulting solid was placed in 30ml of 95% ethanol solution and placed for 2h, washed with water until neutral, dried at 110°C for 12h, crushed through a 200-mesh sieve to obtain alkali-modified fly ash.

[0043] Weigh 40.7g of calcium hydroxide, 20g of nano-copper oxide (the particle size is 40nm~160nm, which accounts for more than 95%, and the specific surface area is 50~80cm 2 / g, bulk density is 0.7±0.02g / cm 3 ), 10 g of alkaline calcium-based bentonite and 40 g of alkali-modified fly ash were mixed for 23 minutes, and 50.2 g of 2.5 wt % sodium metaaluminate wa...

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Abstract

The invention belongs to the technical field of dechlorination, and in particular relates to a normal-temperature gas-phase dechlorination agent and a preparation method and application thereof. The dechlorination agent includes a carrier and an active component, the active component includes CaO and CuO, the carrier is bentonite and alkali-modified fly ash, and the alkali-modified fly ash is fly ash modified by alkali solution. The preparation method of the present invention is prepared by mixing calcium hydroxide, copper oxide, bentonite and alkali-modified fly ash, adding a binder, extruding, drying, and roasting. The dechlorination agent obtained by using the preparation method can The dechlorination function can be realized under the condition of high dechlorination precision and breakthrough chlorine capacity.

Description

technical field [0001] The invention belongs to the technical field of dechlorination, and in particular relates to a normal-temperature gas-phase dechlorination agent and a preparation method and application thereof. Background technique [0002] In the petrochemical industry, catalytic reforming refers to the transformation of the light gasoline fraction obtained from the distillation of raw material oil into high-octane gasoline rich in aromatics under the action of heating, hydrogen and catalysts, and by-product liquefied petroleum gas and hydrogen the process of. Most of the catalysts used in the catalytic reforming process are noble metal platinum-rhenium or platinum-tin catalysts, and trace impurities in the catalytic reforming feedstock oil, such as sulfur, nitrogen, copper, etc., will poison the above-mentioned catalysts, so in order to ensure the catalytic performance of the catalytic reforming catalyst , it is necessary to carry out hydrogenation pre-refining on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/68B01D53/81
Inventor 巩小敏刘晓龙赵素云
Owner SHENYANG SANJUKAITE CATALYST
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