Normal-temperature gas-phase dechlorinating agent and preparation method thereof

A gas-phase dechlorination, room temperature technology, applied in chemical instruments and methods, molecular sieve catalysts, other chemical processes, etc., can solve the problems of unsatisfactory dechlorination performance of dechlorination agents, achieve rich specific surface, reduce usage, The effect of reducing the production cost

Pending Publication Date: 2021-06-04
ZHEJIANG SATELLITE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] From the perspective of existing technology, it is feasible to simply mix the components of the adsorbent evenly by physical and mechanical mixing, or simply add raw materials with a large specific surface to improve the macroscopic parameter index, which is helpful for improving the dechlorination agent. Chlorine performance is less than satisfactory

Method used

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  • Normal-temperature gas-phase dechlorinating agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of LDH-type complexes

[0039] Dissolve 297.9g of zinc nitrate hexahydrate in 1000g of water, stir well to dissolve it, then add 377.13g of aluminum nitrate nonahydrate under stirring conditions, stir well to dissolve it, and then add 50g of multi-stage porous Y molecular sieve powder , and then heat the mixed slurry to 60°C, slowly add 0.05mol / L ammonia solution under stirring condition, monitor the change of pH of the mixed solution, stop adding ammonia water when the pH reaches about 9.5. Under stirring, the mixture was continued to react for 12h.

[0040] Performance evaluation of dechlorination agent

[0041] Fill a glass reaction tube with a diameter of about 20mm with 40.0±0.05g of dechlorinating agent sample. Through a gas generator, a mixed gas with a hydrogen chloride concentration of 2.5-5 mg / L is obtained, and the carrier gas is nitrogen (containing 10% v propylene). Titrate the concentration of hydrogen chloride in the feed gas every 2 hours ...

Embodiment 2

[0043] The mixed liquid in Example 1 was mixed with 60 g of attapulgite, and after wet grinding, the mixed slurry was dried to obtain a solid powder, and the obtained solid powder was molded to obtain a bar-shaped dechlorination agent. The sample was calcined at 400°C for 1.5 hours to obtain a strip-shaped dechlorination agent sample, denoted as S-1, with a diameter of 2.7mm. After testing, the chlorine capacity of the original particle size was 35.9%wt.

Embodiment 3

[0045] Add 441g.5g of magnesium nitrate to 2000g of water, stir well to dissolve it, then add 592.4g of aluminum nitrate nonahydrate under stirring conditions, stir well to dissolve it, and then add 200g of multi-level porous Y molecular sieve powder , and then heat the mixed slurry to 60°C, slowly add 0.05mol / L ammonia solution under stirring condition, monitor the change of pH of the mixed solution, stop adding ammonia water when the pH reaches about 9.5. Under stirring, the mixture was continued to react for 12h. Add 60g carrier, adopt the similar processing method of embodiment 2 to obtain bar-shaped dechlorination and sample, denoted as S-2, after testing the chlorine capacity of the original particle size of the sample is 55.2%wt.

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Abstract

The invention relates to a dechlorinating agent, in particular to a normal-temperature gas-phase dechlorinating agent and a preparation method thereof, and belongs to the technical field of catalysts. The invention relates to a normal-temperature gas-phase dechlorinating agent. The normal-temperature gas-phase dechlorinating agent comprises the following components in percentage by mass: 10-35% of transition metal oxide, 5-25% of light metal oxide, 20%-65% of molecular sieve and 10-30% of support carrier. The normal-temperature gas-phase dechlorinating agent has high utilization efficiency of active components, is suitable for removing acidic hydrogen chloride impurities in hydrocarbon materials at normal temperature, and has relatively high chlorine capacity and removal precision.

Description

technical field [0001] The invention relates to a dechlorination agent, in particular to a normal-temperature gas-phase dechlorination agent and a preparation method thereof, belonging to the technical field of catalysts. Background technique [0002] Acid gas impurities such as hydrogen sulfide and hydrogen chloride are problems that need to be faced in the chemical production process. For example, the catalytic reforming process includes alkane dehydrogenation, isomerization, hydrocracking, etc., the core process of which is the catalyst, which usually uses platinum as the active center, and chlorine injection is usually required to ensure the catalyst’s stability when it is regenerated. activity and stability. This type of chloride mainly enters the product and by-products in the form of hydrogen chloride during the use of the catalyst and is carried downstream. In order to avoid problems such as corrosion and blockage caused by acid gas to downstream devices, the proce...

Claims

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Application Information

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IPC IPC(8): B01J29/08B01J20/18B01J20/30
CPCB01J20/06B01J20/08B01J20/18B01J20/12B01J29/088B01J2229/186
Inventor 杨卫东范昌海高军何秋平寇亮田俊凯陆朝阳亓虎周轶李陈想
Owner ZHEJIANG SATELLITE ENERGY CO LTD
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