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A fine desulfurizer and preparation method thereof

A technology of fine desulfurization and carrier, applied in the field of fine desulfurizer and its preparation, can solve the problems of catalyst poisoning, corrosion of industrial pipelines and equipment, and reduced product quality, and achieves good mechanical strength, large specific surface area, and improved desulfurization effect.

Active Publication Date: 2017-05-10
CNOOC GAS & POWER GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Thiophene is an organosulfur and a heteroatom five-membered monocyclic compound that causes corrosion of industrial pipes and equipment, poisons catalysts and reduces product quality

Method used

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  • A fine desulfurizer and preparation method thereof
  • A fine desulfurizer and preparation method thereof

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preparation example Construction

[0035] Specifically, the preparation method of the refined desulfurizer of the present invention comprises the following steps:

[0036] Step a: One or both of zinc nitrate, manganese nitrate and magnesium nitrate are mixed with aluminum nitrate to prepare a mixed salt solution. Specifically, distilled water can be used to prepare the above mixed salt solution. Wherein, the ratio of the amount of aluminum nitrate to one or both of zinc nitrate, manganese nitrate and magnesium nitrate is controlled to be greater than 2 or less than 1 / 2. The fine desulfurizer prepared by adopting the above ratio can effectively enrich the pores in the desulfurizer carrier. Specifically, after high-temperature calcination, oxides containing a high proportion of aluminum or a high proportion of zinc, manganese, magnesium, etc. are formed, which can be passed through the subsequent acid. These oxides are dissolved to enrich the pores of the carrier.

[0037] Step b: using an alkaline solution as ...

example 1

[0046] Example 1: Preparation of fine desulfurizer

[0047] (1) 182g aluminum nitrate and 446g zinc nitrate are mixed and added to 3000mL distilled water to be mixed with mixed salt solution, then the mixture solution is heated to 60 ℃ and then loaded into No. 1 constant temperature storage tank;

[0048] (2) 2700 mL of Na with a mass concentration of 10% 2 CO 3 The solution was heated to 60°C and put into the No. 2 constant temperature storage tank;

[0049] (3) the solutions in the No. 1 constant temperature storage tank and the No. 2 constant temperature storage tank are added dropwise to the constant temperature reactor in parallel to carry out co-precipitation reaction, and the control reaction time is 20min, and the pH value in the reaction process is 10.2;

[0050] (4) the reaction product in step (3) is filtered, washed to obtain filter cake;

[0051] (5) drying the filter cake obtained in step (4) at 100° C. for 8h;

[0052] (6) in the intermediate product that st...

example 2

[0055] Example 2: Preparation of fine desulfurizer

[0056] (1) 562g aluminum nitrate and 148g zinc nitrate are mixed and added to 4500mL distilled water to be mixed with mixed salt solution, and then the mixture solution is heated to 65 ℃ and then loaded into No. 1 constant temperature storage tank;

[0057] (2) 3500mL mass concentration of Na is 10% 2 CO 3 The solution was heated to 65°C and put into the No. 2 constant temperature storage tank;

[0058] (3) the solution in the No. 1 constant temperature storage tank and the No. 2 constant temperature storage tank is added dropwise to the constant temperature reactor in parallel to carry out co-precipitation reaction, the control reaction time is 22min, and the pH value in the reaction process is 9.2;

[0059] (4) the reaction product in step (3) is filtered, washed to obtain filter cake;

[0060] (5) drying the filter cake obtained in step (4) at 120° C. for 8h;

[0061] (6) in the intermediate product that step (5) obta...

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Abstract

The invention discloses a fine desulfurizer and a preparation method thereof. The fine desulfurizer comprises a carrier and an active component, wherein the carrier is composite oxide formed through reacting one or two of zinc, manganese and magnesium with aluminum; the active component is cupric oxide; the preparation method of the fine desulfurizer includes the following steps: mixing one or two of zinc nitrate, manganous nitrate and magnesium nitrate with aluminium nitrate to prepare a mixed salt solution; carrying out coprecipitation through reacting aqueous alkali as a precipitant with the mixed salt solution; washing, drying and calcinating the precipitate obtained in the previous step to obtain a calcination sample; placing the calcination sample in acid liquor for acid dipping treatment to obtain the carrier; placing the carrier into a copper nitrate solution for dipping treatment, then drying and carrying out pyrolysis to obtain the fine desulfurizer. The fine desulfurizer can effectively eliminate thiofuran which is difficult to remove through conventional methods; the carrier of the fine desulfurizer is subjected to acid dipping treatment, so that the fine desulfurizer is large in specific surface, high in mechanical strength, good in stability and high in desulfuration effect and breakthrough sulfur capacity.

Description

technical field [0001] The present invention relates to the technical field of desulfurizers, and more particularly, to a kind of raw material suitable for producing synthetic natural gas from coke oven gas or coal for producing synthetic natural gas for removing trace amounts of sulfur (including organic sulfur such as thiophene, mercaptan, carbon disulfide, etc.) And inorganic sulfur) fine desulfurizer and preparation method thereof. Background technique [0002] With the wide application of coal-based synthesis gas methanation processes such as coal-to-natural gas and coke-oven gas-to-natural gas, in order to prolong the service life of nickel-based methanation catalysts, more and more attention has been paid to the removal depth of sulfur in methanation feed gas. The general requirement is that the sulfur content in the feed gas entering the nickel-based methanation catalyst bed is reduced to the ppb level. [0003] Sulfur in the syngas obtained from coal gasification a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10K1/00C10K1/20
Inventor 唐令力刘玉成宋鹏飞何洋邢云郑珩王秀林张新波侯建国刘毅高振曾凌云
Owner CNOOC GAS & POWER GRP
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