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Process for preparing catalyst and carrier used in synthesizing 4-methyl amylene-1

A catalyst carrier, methyl pentene technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as unsatisfactory pore structure of alkali metal carbonate carriers and limited addition amount , to achieve the effect of increasing the number, increasing the load, and improving the catalytic performance

Inactive Publication Date: 2004-01-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the alkali metal carbonate is basically a non-porous substance, the addition of graphite or carbon black is very limited (generally less than 5%), so even if graphite or carbon black is added, the pore structure of the alkali metal carbonate carrier is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) preparation of potassium carbonate powder

[0015] Potassium carbonate (chemically pure) powder was sieved and classified, and then classified and mixed according to the Rosin-Rammler curve disclosed in EP0083083 patent. The distribution and content of particles with different particle sizes are shown in Table 1.

[0016] (2) Preparation of alkali metal carbonate carrier

[0017] Take a certain amount of prepared potassium carbonate powder, add 2.5% (by weight) of asparagus powder, 1% of graphite, mix evenly, then press into tablets, crush the pressed tablets, sieve, and take 16-20 mesh (840~1190 micron) particle, put into the roasting tube, flow air roasting under the temperature of 500 ℃ for 6 hours. After that, sieve the particles of 840-1190 microns for later use.

[0018] Potassium Carbonate Powder Particle Size Range

content

(Heavy%)

(10 -6 Meter)

(mesh)

＜100

＞150

4.8

100-280

15...

Embodiment 2

[0024] The catalyst used for propylene dimerization is prepared in the same way as in Example 1, but 5% of potassium metal is added (that is, the active component of the catalyst is a sodium-potassium alloy), and the dimerization conditions are the same as in Example 1. The results are listed in Table 2.

Embodiment 3

[0026] The catalyst used for dimerization of propylene, its preparation method is the same as that of Example 1, but the consumption of asparagus powder is 4%, and the dimerization reaction conditions are the same as that of Example 1. The results are listed in Table 2.

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PUM

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Abstract

The preparation method of catalyst carrier for synthesizing 4-methyl pentene-1 includes the following steps: adding graphite or carbon black and celestine powder in alkali metal carbonate, in which the added quantity of graphite or carbon black is 0.1-5% of weight of alkali metal carbonate and the added quantity of celestine powder is 0.1-10% of the weight of alkali metal carbonate, tabletting, pulverizing, screening and roasting by introducing air at 100-600 deg.C.

Description

technical field [0001] The invention relates to a method for preparing a catalyst carrier for propylene dimerization into 4-methylpentene-1. technical background [0002] 4-Methylpentene-1 is an important branched α-olefin, which can be used as a comonomer of linear low density polyethylene, and can be homopolymerized into thermoplastics, and can also be combined with some higher α-olefins Copolymerized into impact-resistant polymers. In addition, it can also be used to produce chemical products such as methyl isobutyl ketone, and is an important fine chemical raw material. [0003] Extensive research has been done abroad on the preparation of catalysts for the dimerization of propylene to 4-methylpentene-1, and many patents have been published. For example, EP 0057971 and US 4,774,215 report the preparation method of the catalyst whose active component is alkali metal and the carrier is alkali metal carbonate, and the situation of 4-methylpentene-1 by dimerization of prop...

Claims

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Application Information

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IPC IPC(8): B01J27/236
Inventor 段庆华孙洪伟郭战勇吴续源
Owner CHINA PETROLEUM & CHEM CORP
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