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Catalyzer for preparing olefine in low carbon number through catalytic cracking and its preparing method and application

A catalytic cracking and catalyst technology, applied in catalyst activation/preparation, physical/chemical process catalysts, hydrocarbon production from carbon oxides, etc., can solve problems such as poor anti-coking performance, loss speed, etc., and achieve good ability to vaporize coke , improve the ability, improve the effect of anti-coking ability

Inactive Publication Date: 2005-09-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the anti-coking performance of the catalyst is poor
SU910729 discloses a catalyst composed of silicon dioxide, potassium vanadate, ferrous oxide, sodium oxide, and α-alumina. On this basis, 0.1 to 3% of potassium carbonate is added, and the effect of the added potassium carbonate is mainly In order to inhibit coking, but its disadvantage is that the loss is faster

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0046] The preparation method of catalyst A is: at first 100 grams of solid mixture powder pseudo-boehmite is 55%, magnesium oxide is 12%, potassium feldspar is 14%, calcium carbonate is 8%, sodium vanadate is 6%, oxide Lanthanum is 2%, and the content of manganese dioxide is 3%. After fully mixing, then add 8 grams of binder hydroxyethyl cellulose, 30 milliliters of water and 25 milliliters of dilute nitric acid to knead and form a slurry. Carry out extruding molding through a molding machine, and then dry the above-mentioned strips at 80°C for 12 hours; shape the strips after drying to form a more uniform length; then roast the catalyst at 1100°C for 12 hours Hours, finally a catalyst with satisfactory performance is formed.

[0047] Catalyst B was prepared in the same manner as Catalyst A. The weight percent of each component is: 24% for pseudo-boehmite, 15% for magnesium oxide, 13% for potassium feldspar, 15% for nano-scale calcium carbonate, 14% for sodium vanadate, and ...

example 1

[0054] This example illustrates the catalytic performance with catalyst A of the present invention, comparative test 1 and comparative test 2 replace catalyst with inert quartz sand. The catalyst evaluation test was carried out for 20 hours. The process conditions and test results are listed in Table 2. Wherein, the percentage of coking on the surface of the catalyst is the weight percentage of the coking amount in the catalyst. The test results showed that the yields of ethylene and propylene were increased by nearly 8 percentage points compared with the blank test. The amount of coking on the surface of the catalyst accounts for about 1.5% of the total weight of the catalyst.

example 2

[0056] This example illustrates the use of catalytic performance of catalyst B of the present invention, with light oil as cracking raw material. The catalyst evaluation test was carried out for 20 hours. The process conditions and test results are listed in Table 2. Wherein, the percentage of coking on the surface of the catalyst is the weight percentage of the coking amount in the catalyst. The test results showed that the yields of ethylene and propylene were increased by nearly 8 percentage points compared with the blank test. The amount of coking on the surface of the catalyst accounts for about 0.5% of the total weight of the catalyst.

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PUM

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Abstract

A catalyst for preparing low-carbon olefin by catalytic cracking is prepared from alumina, magnesium oxide, sodium vanadate, calcium carbonate, RE metal oxide, kaliophilite or potash feldspar, Cr2O3 and MnO2. Its advantages are high catalytic activity and selectivity, long service life and low reaction temp.

Description

technical field [0001] The invention relates to a catalyst for producing low-carbon olefins by catalytic cracking of petroleum hydrocarbons and its application, more specifically, the invention relates to a catalyst for producing ethylene and propylene by catalytic cracking of petroleum hydrocarbons and its application. Background technique [0002] Hydrocarbon tube furnace steam thermal cracking to olefins is the main method for producing low carbon number olefins in the petrochemical industry today. However, the technology of hydrocarbon tube furnace steam thermal cracking to olefins has been perfected day by day, and there is little potential for further improvement; at the same time, it is a process that consumes a lot of energy, and uses relatively harsh process conditions, so that it is economical. and pipes are subject to certain restrictions. [0003] In order to improve the selectivity of olefins in the cracking process, further increase the yield of ethylene and p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/232B01J37/02B01J37/03C07C1/06C07C11/02
Inventor 程义贵茅文星王萍巴海鹏王永春李小平
Owner CHINA PETROLEUM & CHEM CORP
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