A kind of adsorbent for purifying low-carbon olefins and its preparation and application
A technology of low-carbon olefins and adsorbents, applied in chemical instruments and methods, adsorption purification/separation, organic chemistry, etc., can solve the problem of component distribution and performance differences in product balls that take several hours or more than ten hours Oversized, low cue ball preparation efficiency and other problems, to achieve the effect of high product quality, narrow particle size distribution range, and uniform active components
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Embodiment 1
[0035] An adsorbent for purifying low-carbon olefins and a preparation method thereof, the adsorbent raw material is composed of 13X molecular sieve, quick powder removal and activity regulator, wherein the mixing mass ratio of powdery material 13X molecular sieve and quick powder removal is 45:55 , the mass ratio formula of the active regulator aqueous solution is: 100 parts of water, 3 parts of sodium carbonate, 4 parts of sodium hydroxide, and 5 parts of sodium acetate;
[0036] The preparation method includes the following steps:
[0037] (1) The material molecular sieve and quick powder are fully stirred and mixed in the mixer for 30min.
[0038] (2) Weigh 30kg of the mixed powdery material and transfer it to the ball-forming pot. During the rotation of the pot body at a speed of 30 revolutions per minute, spray 18kg of active regulator aqueous solution evenly in a rapid and continuous manner. Spherical materials with diameters ranging from millimeters to several centime...
Embodiment 2
[0076] Same as Example 1, but the molecular sieve is SAPO-34 powder, and the mass ratio formula of the active regulator aqueous solution is: 100 parts of water, 5 parts of sodium bicarbonate, 2 parts of potassium hydroxide, and 3 parts of sodium oxalate.
[0077] Other preparation methods and processes are the same as in Example 1, and this experiment and sample are marked S2.
[0078] The experimental results of Example 2 and the quality indexes of the spherical samples are shown in Table 6 below. It can be seen that the method of the present invention has high preparation efficiency of the mother ball and high yield of the finished ball, and is suitable for industrial production and application, and the prepared adsorbent has the characteristics of narrow particle size distribution, low wear and high mechanical strength.
[0079] Table 6 Adsorbent experimental results and S2 sample sphere properties
[0080] Experimental results Cue Ball Preparation Efficiency ...
Embodiment 3
[0082] The same as in Example 1, except that the addition ratio of the powdery material and the active regulator aqueous solution was changed to 1:0.5.
[0083] Other preparation processes are the same as in Example 1, and this experiment and sample are marked S3. It can be seen that the adsorbent prepared by the method of the present invention has uniform components, which will contribute to the uniformity of its mechanical strength, and is conducive to keeping the temperature of the adsorbent bed stable and uniform in practical applications, and can reduce the temperature required for regeneration .
[0084] The EDX composition results of the spherical samples of Example 3 are shown in Table 7 below.
[0085] Table 7 EDX analysis results of S3 sample spheres (atomic percentage of elements)
[0086] O Na Al Si Center area 65.65％ 5.01％ 22.08％ 7.26％ shell region 63.64％ 5.27％ 23.45％ 7.64％
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