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High-stability ultralow-mercury catalyst, and preparation method and application thereof

A high-stability, ultra-low-mercury technology, applied in the direction of hydrogen halide addition preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of cumbersome preparation methods and difficult industrial application, so as to improve catalytic activity, Improved dispersion and enhanced thermal stability

Active Publication Date: 2019-09-13
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes an improved type of catalyst that combines two different functions: 1) it helps convert ethanol into higher molecular weight alcohol; 2) It enhances its performance without losing more or fewer alkenes when compared to existing alternatives like zinc sulfate (ZSM).

Problems solved by technology

This patented describes how to reduce harmful emissions during manufacturing processes involving high levels of halogen gases like fluorine or phosphorus. These compounds include organohalides called peroxynitrides which form when exposed to sunlight react chemically with water vapor. To prevent these reactions, an acidic solution containing sulfur trivalents was developed but there were issues associated with their handling and disposal after usage over time. There also had limitations in terms of price competency compared to traditional metal catalysis systems. Ultraviolet ray irradiation technology could potentially provide solutions without generating hazardous waste streams while maintaining desirable activity towards olefin hydrocrackers.

Method used

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  • High-stability ultralow-mercury catalyst, and preparation method and application thereof
  • High-stability ultralow-mercury catalyst, and preparation method and application thereof
  • High-stability ultralow-mercury catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Weigh 2kg of coal-based carbon powder, 0.2kg of barium nitrate and 0.2kg of copper nitrate to obtain a mixture, then weigh 0.5kg of sucralose and dissolve it in 1.6L of deionized water. After the sucralose is completely dissolved, gradually Add it to the mixture of carbon powder and metal nitrate, stir and knead it, and then place it at room temperature for 10 hours.

[0040] (2) Send the sample obtained in step (1) into an extruder to press and extrude to form a columnar carbon with a diameter of 1.5mm, place it at room temperature for 10h, and then dry it at 110°C for 8h to remove excess moisture.

[0041] (3) Put the sample obtained in step (2) into a rotary furnace, and under nitrogen, raise the temperature to 800°C at a heating rate of 5°C / min and keep it warm for 5 hours for deep carbonization treatment, and naturally cool to room temperature to obtain chlorine-doped Miscellaneous defective activated carbon.

[0042](4) take by weighing 1kg step (3) to obtai...

Embodiment 2

[0044] (1) Weigh 2kg of wood charcoal powder, 0.2kg of barium nitrate and 0.2kg of copper nitrate and mix evenly to obtain a mixture, then weigh 0.5kg of sucralose and dissolve it in 1.6L of deionized water. After the sucralose is completely dissolved, gradually add Stir and knead into the mixture of charcoal powder and metal nitrate, and then place it at room temperature for 10 hours.

[0045] (2) Put the sample obtained in step (1) into an extruder and extrude it to form a columnar carbon with a diameter of 1.5 mm. Place it at room temperature for 10 hours, and then dry it at 110°C for 8 hours to remove excess water. .

[0046] (3) The sample obtained in step (2) was sent into the rotary furnace again, and under the condition of nitrogen, the temperature was raised to 800° C. at a heating rate of 5° C. / min and kept for 5 hours for deep carbonization treatment. Naturally cooled to room temperature, chlorine-doped defective activated carbon was obtained.

[0047] (4) take by...

Embodiment 3

[0049] (1) Weigh 2kg of coal-based carbon powder, 0.2kg of barium nitrate, 0.2kg of copper nitrate and 0.5kg of sucralose and mix evenly, measure 1.6L of deionized water, and gradually add to the carbon powder, metal nitrate and sucralose After stirring and kneading the mixture, it was left at room temperature for 10 h.

[0050] (2) Put the sample obtained in step (1) into an extruder and extrude it to form a columnar carbon with a diameter of 1.5 mm. Place it at room temperature for 10 hours, and then dry it at 110°C for 8 hours to remove excess water. .

[0051] (3) Put the sample obtained in step (2) into a rotary furnace, and under nitrogen, raise the temperature to 800°C at a heating rate of 5°C / min and keep it warm for 5 hours for deep carbonization treatment, and naturally cool to room temperature to obtain chlorine-doped Miscellaneous defective activated carbon.

[0052] (4) take by weighing 1kg step (3) to obtain the defect activated carbon doped with chlorine and p...

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Abstract

The invention specifically discloses a high-stability ultralow-mercury catalyst, and a preparation method and application thereof, belonging to the field of catalysts. The preparation method for the ultralow-mercury catalyst comprises the following steps: mixing and molding carbon powder, sucralose and metal nitrate to obtain chlorine-doped defective activated carbon which is used as a carrier, and then loading mercury chloride on the carrier. The prepared ultralow-mercury catalyst is reduced in the content of mercury chloride and improved in catalytic performance and stability. The inventionalso discloses the application of the above ultralow-mercury catalyst to the preparation of vinyl chloride by using a calcium carbide method. The catalyst shows strong catalytic performance and stability in the process of catalytic preparation of vinyl chloride; and the conversion ratio of acetylene is 97.2% or above, the selectivity of vinyl chloride is 99.5% or above, and the loss rate of mercury chloride is less than 3.0%.

Description

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Claims

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Application Information

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Owner ZHEJIANG UNIV OF TECH
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