High-chloride-capacity liquid-phase dechlorinating agent as well as preparation method and application thereof

A technology of dechlorination agent and chlorine-containing liquid, which is applied in the field of liquid-phase purification, can solve the problems of small chlorine capacity and short service life, and achieve the effects of low cost, high mechanical strength and simple preparation method

Inactive Publication Date: 2015-03-25
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the disadvantages of the liquid-phase dechlorination agent in the above-mentioned prior art such as small chlorine capacity and short service life during use, the present invention proposes a liquid-phase dechlorination agent and a preparation method thereof, and the dechlorination agent is reformed to generate oil The application method in phase dechlorination, the dechlorination agent of the present invention has the characteristics of large chlorine capacity, water resistance and long service life in the application of low temperature and low chlorine reforming to generate oil liquid phase dechlorination

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 6.0g of white clay to a nitric acid solution with a concentration of 2mol / L and a volume of 60mL, and stir for 1h at room temperature.

[0032] Add 10.0g of powdered carbon molecular sieve to 3.6g of Mg(NO 3 ) 2 ·6H 2 O, 3.5g of Ca(NO 3 ) 2 ·4H 2 O, 5.0gCu(NO 3 ) 2 ·3H 2 Stir in the O aqueous solution to fully immerse and mix. After removing the excess liquid, the carbon molecular sieve mixture is added to the mixture of the nitric acid solution and the clay, and mixed. Then, after the mixture is kneaded into a shape, the sample is placed in a drying oven at 85°C for 4h, and then it is stabilized in a tube furnace at 800°C under a nitrogen atmosphere for 4h to obtain the finished product dechlorination agent A.

[0033] The properties of the carbon molecular sieve are: the particle size is 70 meshes, the average pore size is 0.6nm, and the specific surface area is 450m. 2 / g.

Embodiment 2

[0035] The bentonite with a mass of 5.0g was added to a nitric acid solution with a concentration of 5mol / L and a volume of 60mL, and stirred at room temperature for 1h.

[0036] Then add 25.0g of powdered carbon molecular sieve to 4.6g of NaNO 3 , 4.5g of Ca(NO 3 ) 2 ·4H 2 O, 5.0gCu(NO 3 ) 2 ·3H 2 O, 3.5gKNO 3 Stir in the mixed aqueous solution to fully immerse it. After removing the excess liquid, the carbon molecular sieve mixture is added to the mixture of the nitric acid solution and the bentonite and mixed with stirring. Then, after the mixture is kneaded into a shape, the sample is placed in a drying oven at 80°C for 4h, and then it is stabilized in a tube furnace at 700°C under a nitrogen atmosphere for 4h to obtain a finished product dechlorinating agent A.

[0037] The properties of carbon molecular sieve are: particle size is 100 mesh, average pore size is 0.6nm, specific surface area is 450m 2 / g.

Embodiment 3

[0039] The kaolin with a mass of 4.5 g was added to an aqueous solution of nitric acid with a concentration of 3 mol / L and a volume of 60 mL, and stirred at room temperature for 45 min.

[0040] Then the powdered carbon molecular sieve with a mass of 34.0g was added to 6.5g of Cu(NO 3 ) 2 ·3H 2 O, 5.5g of Ca(NO 3 ) 2 ·4H 2 O, 2.3g of Ba(NO 3 ) 2 Stir in the mixed aqueous solution to make it fully immersed. After the excess liquid is removed, the carbon molecular sieve mixture is added to the mixture of the nitric acid solution and kaolin and mixed with stirring. Then, after the mixture is kneaded into a shape, the sample is placed in a drying oven at 90°C for 4h, and then it is stabilized in a tube furnace at 800°C under a nitrogen atmosphere for 3h to obtain a finished product dechlorination agent C.

[0041] The properties of the carbon molecular sieve are: the particle size is 140 meshes, the average pore size is 0.6nm, and the specific surface area is 450m. 2 / g.

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Abstract

The invention provides a high-chloride-capacity liquid-phase dechlorinating agent as well as a preparation method and an application thereof. The high-chlorine-capacity liquid-phase dechlorinating agent is suitable for removing inorganic chlorine from an oil product and is particularly suitable for removing hydrogen chloride from reformate. A carrier of the dechlorinating agent is a carbon molecular sieve, active ingredients of the dechlorinating agent comprise an alkali metal and an alkali earth metal oxide, and an auxiliary agent component is copper oxide, ferric oxide or zinc oxide. The preparation method of the solid dechlorinating agent provided by the invention comprises the following steps: dipping soluble copper salt, calcium salt, magnesium salt, barium salt and the like to a cylindrical carbon molecular sieve, drying, and performing stabilizing treatment to obtain the dechlorinating agent. The dechlorinating agent provided by the invention has the advantages of being relatively high in chloride capacity, low-price and easily available in raw material, having active ingredients uniformly distributed on the carrier, good in thermal stability, strong in water resistance, high in mechanical strength and the like, and the dechlorinating agent has desulfurization and denitrification effects at the same time.

Description

Technical field [0001] The invention relates to a liquid-phase dechlorinating agent, which is an absorbent of inorganic chlorine in oil products, in particular to a dechlorinating agent for reforming and forming oil hydrogen chloride, and belongs to the technical field of liquid-phase purification. Background technique [0002] There are two sources of chlorine in the catalytic reforming process: one is to add chlorides (mostly organic chlorides) when extracting crude oil to increase oil recovery. As the oil recovery rate increases, it also leads to an increase in the chlorine content of crude oil. In the pre-hydrogenation process, this part of the organic chlorine will be converted into inorganic chlorine, combined with hydrogen to form hydrogen chloride, and then react with the nitride to form ammonium chloride, which will cause blockage and corrosion of the equipment during the heat exchange and cooling process. The second is that the reforming catalyst is a dual-functional c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/04B01J20/28B01J20/32C10G25/00
CPCB01J20/041B01J20/06B01J20/20B01J20/3204B01J20/3236C10G25/003
Inventor 桂建舟刘丹庄超杨丽霞李艺
Owner TIANJIN POLYTECHNIC UNIV
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