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Type-Y molecular sieve absorbent as well as preparation method and method for removing sulfur dioxide in iso-butane

A technology of sulfur dioxide and molecular sieve, applied in adsorption purification/separation, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of difficult and difficult removal of sulfur dioxide, and achieve the effect of high removal rate

Inactive Publication Date: 2018-07-24
CHINA UNIV OF PETROLEUM (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that sulfur dioxide in the unreacted isobutane in the prior art is difficult to deeply remove the technical problem, the purpose of the present invention is to provide a kind of transition metal Y-type molecular sieve adsorbent and preparation method thereof; The purpose of the present invention It also provides a method for removing sulfur dioxide in unreacted isobutane in an alkylation unit by the transition metal Y-type molecular sieve adsorbent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This embodiment provides a method for preparing a transition metal Y-type molecular sieve adsorbent, comprising the following steps:

[0040] Mix kaolin and pseudo-boehmite powder at 1:1 (mass ratio), soak in 0.6g / L NaOH solution at 70°C for 15h, then wash with distilled water until neutral, and dry in an oven at 120°C for 12h , followed by roasting at 550°C for 5 hours to obtain a deacidification-treated carrier, and then grinding it into a powder of less than 300 meshes and extruding it;

[0041] Perform ion exchange loading on the above-mentioned deacidified carrier and NiCl to prepare a semi-finished product of NiY molecular sieve adsorbent (loading capacity is 4%);

[0042] The NiY molecular sieve adsorbent of this example was obtained by drying the semi-finished NiY molecular sieve adsorbent at 120° C. for 12 hours and roasting at 550° C. for 4 hours.

[0043] This embodiment also provides the NiY molecular sieve adsorbent prepared by the above preparation method...

Embodiment 2

[0048] This embodiment provides a method for preparing a transition metal Y-type molecular sieve adsorbent, comprising the following steps:

[0049] Mix attapulgite and pseudoboehmite powder at a ratio of 2:1 (mass ratio), and use 0.8g / L NH 3 ·H 2 Soak the O solution at 70°C for 15 hours, wash with distilled water until neutral, bake in an oven at 120°C for 12 hours, and then roast at 550°C for 5 hours to obtain the deacidified carrier, and then grind it into a powder of less than 300 meshes. extrusion;

[0050] The above-mentioned deacidified support was mixed with CuCl 2 Perform ion exchange loading to prepare CuY molecular sieve adsorbent semi-finished product (loading capacity is 5%);

[0051] The semi-finished CuY molecular sieve adsorbent was baked at 120° C. for 12 hours and calcined at 550° C. for 4 hours to obtain the CuY molecular sieve adsorbent of this example.

[0052] This embodiment also provides the CuY molecular sieve adsorbent prepared by the above prepar...

Embodiment 3

[0057] This embodiment provides a method for preparing a transition metal Y-type molecular sieve adsorbent, comprising the following steps:

[0058] Soak pseudo-boehmite powder in 0.8g / L NaOH solution at 70°C for 15h, then wash with distilled water until neutral, bake in an oven at 120°C for 12h, and then roast at 550°C for 5h to obtain deacidification treatment carrier, and then grind it into a powder of less than 300 meshes, extrude,

[0059] The above-mentioned deacidified carrier was mixed with CoCl 2 Carry out ion exchange loading to prepare CoY molecular sieve adsorbent semi-finished product (loading capacity is 5%);

[0060] The CoY molecular sieve adsorbent of this example was obtained by drying the semi-finished product of the CoY molecular sieve adsorbent at 120° C. for 12 hours and calcining at 550° C. for 4 hours.

[0061] This embodiment also provides the CoY molecular sieve adsorbent prepared by the above preparation method.

[0062] This implementation also p...

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Abstract

The invention provides a type-Y molecular sieve absorbent as well as a preparation method and method for removing sulfur dioxide in iso-butane. The preparation method of the type-Y molecular sieve absorbent comprises the following steps: performing the de-acidification for a vector to obtain the de-acidified vector; performing the ion exchange loading for the de-acidified vector and a chloride ofa transitional metal to obtain a semi-finished product of the transitional metal type-Y molecular sieve absorbent; drying the semi-finished product of the transitional metal type-Y molecular sieve absorbent, roasting, and obtaining the transitional metal type-Y molecular sieve absorbent; and a loading amount of the transitional metal type-Y molecular sieve absorbent is 0.8 to 9.0 percent. The transitional metal type-Y molecular sieve absorbent provided by the invention is adopted to remove the sulfur dioxide in iso-butane which is incompletely reacted in an alkylation apparatus, the removal rate is higher, and the content of the sulfur dioxide in the iso-butane which is not reacted in the alkylation apparatus can be removed to be 1 mg / kg or more.

Description

technical field [0001] The invention belongs to the technical field of alkylation desulfurization, and relates to a transition metal Y-type molecular sieve adsorbent, a preparation method thereof and a method for removing sulfur dioxide in unreacted isobutane in an alkylation device. Background technique [0002] The raw material for sulfuric acid alkylation is usually the C4 fraction by-product of FCC unit, in which isobutane and butene react under the action of sulfuric acid catalyst to generate alkylate oil, and the generated alkylate oil is pickled, pickled and washed with water After the acid and ester are removed in the refining process, it enters the deisobutanizer, and the unreacted isobutane is separated from the top of the tower. The isobutane content is about 87%, which has good recycling value. Due to the use of sulfuric acid as a reaction catalyst, a small amount of sulfur dioxide is inevitably entrained in the separated unreacted isobutane. Isobutane is an imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16B01J20/12B01J20/30C07C7/13C07C9/12
CPCB01J20/16B01J20/0288B01J20/12C07C7/13C07C9/12
Inventor 周广林周红军王晓胜吴全贵李芹周烨
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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