Solid phosphoric acid catalyst for low carbon olefine oligomerization or polymerization

A phosphoric acid catalyst, low-carbon olefin technology, applied in the fields of hydrocarbons, hydrocarbons, organic chemistry, etc., can solve the problems of not achieving high catalytic activity and high strength

Inactive Publication Date: 2003-02-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the previous solid phosphoric acid catalyst, the activity, crushing strength and anti-sludge performance of the catalyst have been greatly improved, but it has not yet reached the long-term pursuit of solid phosphoric acid catalyst with high catalytic activity and high strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0028] According to the preparation method of embodiment 1, difference: replace magnesium oxide with niobium pentoxide, 90 gram boron oxides replace 105 gram boric acid, the solid phosphoric acid catalyst that makes consists of:

[0029] Si 1 B 1.35 Nb 0.08 (P 2 o 5 ) 1.55 ·(H 2 O) 0.8

[0030] Catalyst crush strength 980N / cm 2 .

[0031] According to the aforementioned catalyst evaluation process, the catalyst was used in the butene-2 ​​oligomerization reaction, and the evaluation process conditions were: reaction temperature 180 ° C, pressure 5.0 MPa, liquid volume space velocity 2.0 hours -1 , the raw material butene-2 ​​concentration is 85.8% (mass). Catalyst evaluation results: butene-2 ​​oligomerization was carried out for 80 days, the average conversion rate of butene-2 ​​was 85.0%, and the selectivity of octene was 90.1%. The catalyst liquid yield reached 1700 kg / kg catalyst, and the catalyst activity showed no downward trend. [Example 3]

Embodiment 3

[0032] According to the preparation method of Example 1, difference: 450 grams of polyphosphoric acid, replace magnesium oxide with zirconia and manganese dioxide; Pass into air and water vapor to activate, air: water vapor molar ratio 1.1: 1, activation temperature 200°C, activation time 4 hours, the composition of the prepared solid phosphoric acid catalyst is:

[0033] Si 1 B 0.88 mn 0.03 Zr 0.07 (P 2 o 5 ) 1.40 ·(H 2 O) 0.9

[0034] Catalyst crush strength 900N / cm 2 .

[0035] According to the aforementioned catalyst evaluation process, the catalyst was used in the propylene oligomerization reaction, and the evaluation process conditions were: reaction temperature 190 ° C, pressure 4.0 MPa, liquid volume space velocity 2.0 hours -1 , raw material propylene concentration 47% (mass). The evaluation results of the catalyst were as follows: the propylene oligomerization reaction lasted for 12 days, the average conversion rate of propylene was 79.8%, and ...

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Abstract

The present invention relates to a kind of solid phosphoric acid catalyst for oligomerization or polymerizing of low-carbon olefine. The molar ratio expression of the catalyst is SiBaXb(P2O5)c.(H2O)d, where X is at least one selected from Zr, Nb, Mn and Mg; a=0.1-1.5; b=0.01-0.5; c=1.0-2.0; and d=0.6-1.2. The catalyst of the present invention has excellent catalytic activity high crushing strength, high stability and long service life, and may be used in industrial production.

Description

technical field [0001] The invention relates to a solid phosphoric acid catalyst for oligomerization or stacking of low carbon olefins. Background technique [0002] Light olefins include C3 and C4 olefins, mainly derived from refinery gas and naphtha steam cracking products. In recent years, the research and development of low-carbon olefin oligomerization process and its catalysts has been extremely rapid. Low-carbon olefins can be oligomerized or laminated through catalysts to produce high-quality engine fuels and C 7 ~C 12 Advanced olefins are used as raw materials for fine chemicals such as plasticizers, surfactants and lubricating oil additives, and have good economic benefits. Preparation of C from light olefins 7 ~C 12 Higher olefins are characterized by relatively simple process and mature technology. The main difference in the synthesis method is the use of different catalysts. Phosphoric acid series catalysts are often used, such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/18
Inventor 徐菁袁梅卿姚亚平陈永福金萍周海春
Owner CHINA PETROLEUM & CHEM CORP
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