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Solid desulfurization adsorbent and its preparation method and use

An adsorbent and solid technology, which is applied in the field of solid desulfurization adsorbent and its preparation and application, can solve the problems of low adsorption purification depth, poor desulfurization selectivity, and low sulfur capacity, and achieve improved adsorption selectivity, increased sulfur capacity, and high The effect of adsorption capacity

Active Publication Date: 2015-09-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is the problems of low adsorption purification depth, low sulfur capacity, and poor desulfurization selectivity in the prior art. A new solid desulfurization adsorbent is provided

Method used

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  • Solid desulfurization adsorbent and its preparation method and use
  • Solid desulfurization adsorbent and its preparation method and use

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Contains Cu 2+ The preparation process of ion-exchanged NaY molecular sieve and activated alumina solid desulfurization adsorbent is as follows. First prepare Cu(NO 3 ) 2 solution, add NaY molecular sieve powder, and stir at 60°C for 12 hours. Filter and rinse with deionized water. Repeat the above operation three times. Then use alumina as the binder to shape, dry naturally, and bake at 500°C for 2 hours in the air. Grind to 10-20 meshes, and dry at 500°C until the mass no longer decreases to obtain a solid desulfurization adsorbent.

[0025] The performance evaluation of adsorption and purification of low concentration methyl mercaptan in isobutene was carried out on a fixed bed device. The experimental conditions are: 2.0MPa, 30°C, the content of methyl mercaptan in isobutylene is about 200ppmv, and the liquid volume space velocity is 2 hours -1 , the diameter of the adsorbent particles is 830-1700 μm, and the bed aspect ratio is 6:1. The pre-activation or rege...

Embodiment 2～20

[0027] According to the various steps and conditions of [Example 1], the solid adsorbent was prepared and evaluated. Only the composition or preparation conditions are changed, the changed conditions are listed in Table 1, and the evaluation results are listed in Table 2.

[0028] Table 1

[0029]

[0030] Table 2

[0031]

[0032] *The measurement condition of the equilibrium adsorption amount of isobutylene is 30°C.

Embodiment 21

[0034] According to the method and preparation steps of [Example 1], with Al 2 o 3 As the binder, the NaY molecular sieve exchanged with the mixed solution of copper acetate and lithium acetate is molded to obtain the adsorbent. The prepared ion exchange solution contains 5% copper acetate and 5% nickel acetate. The obtained solid adsorbent is calculated as Al by weight fraction 2 o 3 40 parts, the rest is Cu 2+ and Ni 2+ Two ion-exchanged NaY molecular sieves. According to the same evaluation conditions of [Example 1], the breakthrough adsorption capacity of methyl mercaptan is 20.1 mg / g adsorbent, and the content of methyl mercaptan after purification is lower than 0.5 ppmv.

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Abstract

The invention relates to solid desulfuration adsorbent and a preparation method and application thereof and mainly solves the problems of low adsorptive purification depth, low sulfur capacity and poor desulfuration selectivity in the prior art. The solid desulfuration adsorbent comprises, by weight, 20-80 parts of at least one adhesive of aluminum oxide or silicon oxide, and 20-80 parts of ion-exchange-modified molecular sieve. The ion-exchange-modified molecular sieve comprises, by weight, 1-20 parts of at least one metal cation of Ag+, Fe2+, Co2+,Ni2+, Cu2+, Zn2+, Nd3+, Ce3+ or Ga3+, and 80-99 parts of at least one A-type, X-type, Y-type, L-type, mordenite, ZSM zeolite, Al-MCM-41 or beta molecular sieves. The problem is solved well by the application of the technical scheme. The solid desulfuration adsorbent is applicable to industrial adsorptive purification of removing silicon compounds in various alkene materials.

Description

technical field [0001] The invention relates to a solid desulfurization adsorbent and its preparation method and application. Background technique [0002] As an important basic organic chemical raw material, propylene is widely used and its demand is expanding day by day. Olefin disproportionation technology is one of the effective methods to increase propylene production. The industrialized Olefin Conversion Technology (OCT) is a typical olefin disproportionation reaction: one molecule of ethylene and one molecule of butene generate two molecules of propylene under the action of a catalyst. C 4 As one of the raw materials for olefin disproportionation, olefins have complex compositions, different sources, and different components. It inevitably contains some sulfide impurities, usually including hydrogen sulfide, carbonyl sulfide, mercaptan, sulfide, disulfide and thiophene. Sulfur-containing impurities will not only cause certain corrosion to production equipment and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/18B01J20/30C07C7/12
Inventor 肖永厚洪涛王仰东刘苏
Owner CHINA PETROLEUM & CHEM CORP
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