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Preparation and application of an adsorbent for removing impurities in propane stream

An adsorbent and propane technology, which is applied in the field of adsorbent preparation, can solve the problems of increasing the amount of adsorbent and the volume of the purification device, increasing the investment cost of the device, and reducing the adsorption capacity, so as to increase the use temperature range, reduce the thermal effect, The effect of improving the resistance to phase change

Active Publication Date: 2021-04-27
奥斯催化材料(大连)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through molecular sieve modification, adjust the pore channel or skeleton charge of zeolite molecular sieve to reduce the reactivity, which will inevitably lead to a decrease in the adsorption capacity of the adsorbent for impurities.
The decline in the capacity of adsorbing impurities will increase the amount of adsorbent and the volume of the purification device, which will increase the investment cost of the device and the operating cost in the later stage. There are also problems such as incomplete regeneration during the regeneration operation, and the adsorption capacity of the adsorbent is affected by the increase in the number of regenerations. and rapidly diminishing

Method used

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  • Preparation and application of an adsorbent for removing impurities in propane stream
  • Preparation and application of an adsorbent for removing impurities in propane stream
  • Preparation and application of an adsorbent for removing impurities in propane stream

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] will be 540g ρ -Al 2 o 3 Powder, 359g13X molecular sieve and 0.9g of lanthanum oxide are mixed, and then placed in a flat-bottomed rotating disk for rotatable molding, spraying a certain amount of water during the rotatable molding process, screening the particles with a diameter of 1~3 mm, at 80 °C Bake for 6h, then bake at 140°C for 1h, and then bake at 500°C for 2h to prepare Sample 1.

[0044] Grind sample 1 into powder for XRD analysis, such as figure 1 shown. Sample 1 is particles with a diameter of 1~3mm, such as figure 2 shown.

Embodiment 2

[0046] A fixed bed reactor was used to evaluate the adsorption performance of the adsorbent prepared in Example 1. The size of the reactor bed is 4 mm (ID) × 25 mm (H), the loading amount of the adsorbent is 10 g, and the two ends of the bed are filled with glass beads. Purge the adsorbent bed with nitrogen at 200°C for 4h, WHSV=500h -1 , then cooled to 35 °C. Use propane containing 200 ppm (mole) methanol, 200 ppm (mole) dimethyl ether and 200 ppm (mole) butadiene as the adsorbent evaluation medium, according to 2~3h -1 The space velocity of WHSV was continuously fed under the outlet pressure of 2.3 MPa, and was detected online by gas chromatography with a helium ion detector (HID). Through the online detection of gas chromatography, the time when the adsorbent is saturated and penetrated under different outlet concentrations (PPM level) can be known, combined with the total flow rate and impurity component content, the saturation of the adsorbent under different impurity o...

Embodiment 3

[0048] The rapid aging method is used to test the effective adsorption capacity of the adsorbent after frequent regeneration. After the adsorbent is saturated once as described in Example 2, it is purged with nitrogen for 30 min at 260 °C, and the bed is cooled to 35 °C. , switch the gas path to propane, let the impurity stream flow through the adsorbent bed according to the method described in Example 2 and record the adsorption saturation time. The above steps represent a cycle in the rapid aging test. The adsorbent that completed 80 cycles had an adsorption capacity of 25.8 g / 100 g adsorbent.

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Abstract

The invention relates to the preparation and application of an adsorbent for removing impurities in propane streams, belonging to the technical field of adsorbent preparation. The adsorbent mixes molecular sieves, alumina and rare earth oxides in proportion, and then shapes them according to the desired shape to obtain the required adsorbent. Compared with the prior art, the adsorbent prepared by the present invention can selectively adsorb polar molecules such as unsaturated hydrocarbons, oxygen-containing compounds, sulfides, and nitrogen-containing compounds, and has the advantages of high adsorption capacity and wide operating temperature range, especially It is suitable for the purification of propane streams in propane deep processing processes such as propane ammoxidation to acrylonitrile; propane dehydrogenation to propylene; propane cracking to olefins.

Description

technical field [0001] The invention relates to the preparation and application of an adsorbent for removing impurities in propane streams, which belongs to the technical field of adsorbent preparation. Background technique [0002] Propane is an important petrochemical raw material. In the petrochemical industry, propane can be used as a feedstock for steam cracking to prepare basic petrochemical products; due to the huge price difference between propane and propylene, and the abundance of propane resources, many companies around the world are currently researching the use of propane as raw material to produce propylene and propylene Nitrile process. [0003] With the development of the market economy, the demand for these downstream derivatives has grown rapidly, thus driving the huge market demand for propane. [0004] Propane is a by-product of processing natural gas or refining crude oil. During the processing of natural gas, butane, propane and large amounts of etha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/18B01J20/30C10G25/00
CPCB01J20/06B01J20/08B01J20/18C10G25/00
Inventor 张文赟
Owner 奥斯催化材料(大连)有限公司
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