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A kind of preparation method of naphtha isomerization catalyst

A catalyst, isomerization technology, applied in physical/chemical process catalysts, reformed naphtha, molecular sieve catalysts, etc., can solve the problems of high reaction temperature, polluted environment, and corroded equipment.

Active Publication Date: 2017-08-22
SINOPEC DALIAN RES INST OF PETROLEUM & PETROCHEMICALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two types of catalysts have problems such as polluting the environment and corroding equipment. The halogen-containing solid acid catalyst is easy to lose halogen, so there is strict control on the water in the raw material, and frequent halogen supplementation is required.
SO 4 2- / ZrO 2 Solid superacid catalysts have the advantages of high activity, good selectivity, easy phase separation from reactants and products, environmental friendliness, no corrosion of equipment, and regeneration. And has a high activity, is considered to be a promising isomerization catalyst, but there are shortcomings such as easy deactivation of the catalyst
[0004] CN1229368A discloses a solid acid catalyst and a preparation method thereof. The catalyst introduces alumina through a kneading method, which stabilizes tetragonal zirconia, but when it is used for alkane isomerization, the produced C 1 ~C 4 There are many low-carbon alkanes, and the isomerization selectivity is still not ideal
The above-mentioned catalyst still has problems such as high reaction temperature and octane number to be improved

Method used

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  • A kind of preparation method of naphtha isomerization catalyst
  • A kind of preparation method of naphtha isomerization catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Dissolve chloroplatinic acid containing 0.3 grams of platinum in 6 grams of water, fully mix 10 grams of 200-mesh cellulose with the above solution, and dry the mixture at 80°C for 6 hours to obtain platinum-loaded cellulose.

[0027] (2) Fully knead 45 grams of mordenite, 72 grams of aluminum hydroxide dry rubber powder (SB produced by Condean, Germany, 76% on a dry basis), platinum-loaded cellulose, 50ml of 0.2M nitric acid solution and 30ml of water , making it into a paste-like plastic, forming a cylindrical strip with a diameter of 1.5mm on an extruder, drying the cylindrical strip at 110° C. for 8 hours, and then roasting at 650° C. for 4 hours in an air atmosphere to obtain a catalyst product. The pore volume of the catalyst with a pore diameter of 1-10nm accounts for 5.9% of the total pore volume, and the pore volume of 100-1000nm accounts for 55.3% of the total pore volume. The catalyst composition is shown in Table 1, and the evaluation results are shown in...

Embodiment 2~8

[0029] The same as Example 1, the difference is that the types and amounts of various substances in each step have been adjusted, and the composition of the catalyst is different. The catalyst numbers of each embodiment are E-2~E-8, and the pore-forming catalysts used in each embodiment are The dosage and catalyst composition are shown in Table 1, and the evaluation results are shown in Table 2.

Embodiment 9

[0035] E1~E8 and C1~C2 were evaluated for catalyst performance, and the evaluation conditions were as follows: take hydrorefined naphtha (RON=53) as raw material, take 20ml of catalyst, dilute with 10ml of quartz sand and fill it into a fixed-bed micro-continuous Catalytic activity evaluation was carried out in the reactor. Before the evaluation, under the conditions of pressure 2MPa and temperature 200°C, pure hydrogen was introduced at a rate of 800 gas volume ratio (the volume of the gas entering to the catalyst loading volume ratio), and after 2 hours, the temperature was raised to 290°C and kept The time is 4 hours for catalyst activation; then the pressure and temperature are constant, the hydrogen hydrocarbon molar ratio is adjusted to 4, and the volume space velocity is 2.0h-1 Enter the raw material, at 290°C, 2.0MPa, volume space velocity 2.0h -1 , Under the condition that the molar ratio of hydrogen to hydrocarbon is 4.0, the reaction is a constant every 8 hours, and...

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Abstract

The invention discloses a preparation method of a naphtha isomerization catalyst, comprising the following contents: (1) loading active components on a macroporous pore-forming agent, and then drying to obtain a modified pore-forming agent; (2) Molecular sieve, refractory oxide, modified pore-forming agent, peptizer and water are kneaded to form a plastic body, extruded, dried and calcined to obtain a catalyst product. The method not only has the advantages of simple preparation process and low cost, but also the catalyst product is used in the naphtha isomerization reaction and has the characteristics of high yield of the target product and high octane number.

Description

technical field [0001] The invention relates to a preparation method of a naphtha isomerization catalyst. Background technique [0002] Petroleum is the blood of modern industry, and petrochemical industry is a very important basic chemical industry. The gasoline fraction (ie naphtha) produced by the refinery's atmospheric and vacuum process generally has an octane number (RON) between 45 and 60 and must be catalyzed. Reactions such as reforming, alkylation, or isomerization change the molecular structure, increase the content of isoparaffins and aromatics, and reduce the content of straight-chain hydrocarbons to achieve the purpose of increasing the octane number. But now clean gasoline has put forward strict restrictions on the content of aromatics, and the alkylation process will cause serious environmental pollution, which greatly limits its scale production. The isomerization process is to solve the problem of producing high An economical and efficient technical route ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/18C10G35/095
Inventor 刘全杰徐会青贾立明王伟
Owner SINOPEC DALIAN RES INST OF PETROLEUM & PETROCHEMICALS CO LTD
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