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Dechlorinating agent as well as preparation method and application thereof

A dechlorination agent and modifier technology, applied in separation methods, chemical instruments and methods, other chemical processes, etc., can solve the problem of inability to specifically remove hydrogen chloride, achieve good dechlorination effect, promote interaction, and improve fragmentation. the effect of strength

Pending Publication Date: 2022-01-21
SHENYANG SANJUKAITE CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the dechlorination agent in the prior art cannot specifically remove hydrogen chloride under high hydrogen sulfide working conditions, thereby providing a dechlorination agent and its preparation method and application

Method used

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  • Dechlorinating agent as well as preparation method and application thereof
  • Dechlorinating agent as well as preparation method and application thereof
  • Dechlorinating agent as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The present embodiment provides a kind of preparation method of dechlorination agent, comprises the following steps,

[0036] The specific surface area of ​​50g is 650m 2 / g, X-type molecular sieve with a pore size of 0.7nm, 10g of potassium carbonate, 30g of magnesium hydroxide, 5g of turnip powder, 35g of silica sol, 10g of kaolin and 5g of oxalic acid were mixed evenly, and dried at 100°C for 2 hours after extruding. Roast at 480°C for 3 hours to obtain a gas-phase dechlorination agent.

[0037] The pore size distribution figure of gained dechlorination agent is as follows figure 1 As shown, as can be seen from the figure, its mesopore diameter is mainly distributed in 3-4nm and 6-50nm, meanwhile, there are also pore distributions above 50nm, and the overall pore size distribution is diversified; other embodiments and comparative examples are attached The figure is no longer provided, only the pore size distribution of the mesopores is given.

Embodiment 2

[0039] The present embodiment provides a kind of preparation method of dechlorination agent, comprises the following steps,

[0040] The specific surface area of ​​50g is 900m 2 / g, X-type molecular sieve molecular sieve with a pore size of 1.0nm, 20g sodium carbonate, 10g sodium carbonate, 20g attapulgite and 5g tartaric acid, mix evenly, add 25g silica sol rolling balls, dry at 110°C for 3h, and then dry at 350°C Under roasting for 6h to obtain a gas phase dechlorination agent.

Embodiment 3

[0042] The present embodiment provides a kind of preparation method of dechlorination agent, comprises the following steps,

[0043] The specific surface area of ​​50g is 400m 2 / g, X-type molecular sieve molecular sieve with a pore size of 1.2nm, 5g sodium hydroxide, 35g calcium hydroxide, 3g sodium carboxymethylcellulose and 10g disodium ethylenediaminetetraacetic acid are mixed evenly, and 35g silica sol is added to form a rolling ball , dried at 120°C for 4h, and then roasted at 550°C for 4h to obtain a gas-phase dechlorination agent.

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Abstract

The invention belongs to the technical field of preparation of dechlorinating agents, and particularly relates to a dechlorinating agent as well as a preparation method and application thereof. The raw materials comprise an X-type molecular sieve, an alkali metal compound, an alkaline earth metal compound, a binder and a pore structure modifier. The pore structure modifier is at least one of citric acid, tartaric acid, ethylenediaminetetraacetic acid, oxalic acid, carboxylic acid or salt compounds formed by the citric acid, the tartaric acid, the ethylenediaminetetraacetic acid, the oxalic acid and the carboxylic acid. The X-type molecular sieve, the pore structure modifier, the alkali metal compound, the alkaline earth metal compound and the binder are used as raw materials, the obtained dechlorinating agent can specifically adsorb inorganic chlorine under the normal temperature condition and the high hydrogen sulfide condition, and the dechlorinating agent is a gas-phase dechlorinating agent; the dechlorinating agent has a good dechlorinating effect especially in the fields of dechlorinating products for preparing propylene through propane dehydrogenation and the like, inorganic chlorine can be selectively adsorbed under the condition of high hydrogen sulfide, and the dechlorinating precision can reach 0.5 ppm or below.

Description

technical field [0001] The invention belongs to the technical field of dechlorination agent preparation, and in particular relates to a dechlorination agent and its preparation method and application. Background technique [0002] Propane reserves are abundant, and the development of shale gas in recent years has further increased the production of propane. At present, most of the utilization of propane is directly burned for energy supply, which greatly reduces its utilization value. Converting propane into products with high added value is one of the key technologies to improve the utilization efficiency of propane and realize the efficient utilization of carbon-based energy. It has broad practical prospects and huge economic benefits. [0003] Among the downstream products of propane, propylene is a very important chemical raw material, which can be used to produce high value-added products such as polypropylene, acrylonitrile, propylene oxide, ethylene-propylene rubber,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/28B01J20/18B01J20/04C10L3/10B01D53/02C07C7/13C07C11/06
CPCB01J20/18B01J20/041B01J20/04B01J20/28057B01J20/3042B01J20/3064B01J20/28061B01J20/28064B01J20/043C10L3/101B01D53/02C07C7/13B01D2253/108B01D2253/1124B01D2253/112B01D2257/2025B01D2257/2064C07C11/06Y02P20/52
Inventor 王鹏翚单红飞迟莹景云峰李晓凡
Owner SHENYANG SANJUKAITE CATALYST
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