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Method for catalyzing and transforming naphtha

A naphtha and catalyst technology, applied in the field of catalytic conversion of naphtha, can solve the problem of less research on widening the source of reforming raw materials, and achieve the effect of widening the source of raw materials

Active Publication Date: 2009-11-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In recent years, many catalytic materials with special properties have been developed in China for reforming or processing heavy aromatic raw materials, but there are relatively few studies on expanding the source of reforming raw materials

Method used

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  • Method for catalyzing and transforming naphtha
  • Method for catalyzing and transforming naphtha
  • Method for catalyzing and transforming naphtha

Examples

Experimental program
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Effect test

preparation example Construction

[0043]The preparation method adopted for the above-mentioned hydroaromatization catalyst is as follows: after mixing the zeolite and the binder, use the acetic acid aqueous solution as the peptizer, knead and extrude into a strip, dry and roast at 500-650°C for 4-6 hours to obtain Carrier, load Group VIII metals, alkali metals or alkaline earth metals and halogens on the formed carrier at the same time by co-impregnation method, dry at 50-120°C for 4-12 hours, bake at 200-350°C for 4-6 hours, 300-500 ℃ hydrogen reduction for 1 to 6 hours.

[0044] The non-hydroaromatization catalyst comprises 0.5-5.0 mass % of metal oxides selected from zinc, molybdenum or gallium, 0.1-5.0 mass % of rare earth oxides, 1.0-7.0 mass % of VA group elements and 83.0 ~98.4% by mass of composite carrier, the composite carrier includes 20-70% by mass of ZSM series zeolite or MCM series zeolite and 30-80% by mass of binder. The VA group element is preferably phosphorus, antimony or bismuth, more pref...

example 1

[0065] This example prepares hydrorefined naphtha.

[0066] Hydrocracked oil with ASTM D-86 boiling range of 95-258°C, coker oil with 50-166°C, catalytic cracked oil with 42-163°C, normal pressure priming oil with 58-89°C and 91-182°C Straight-run naphtha is made into mixed raw material oil according to the mass ratio of 50:20:5:5:20.

[0067] The above-mentioned mixed feedstock oil was heated at 290°C, the hydrogen partial pressure was 2.0 MPa, the hydrogen / hydrocarbon volume ratio was 200:1, and the feed volume space velocity was 8.0 hours -1 Hydrofining is carried out in the presence of hydrogenation catalyst A under certain conditions. The reaction product is sent to a water cooler, separated into two phases of gas and liquid, measured separately and analyzed for composition. The hydrogenation catalyst A contains 0.03% by mass of CoO, 2.0% by mass of NiO, and 19.0% by mass of WO 3 and 78.97% by mass of Al 2 o 3 . The properties of raw oil before and after hydrofining...

example 2

[0069] Preparation of catalysts for the lightening reaction of heavy fractions.

[0070] (1) Preparation of Beta molecular sieves with low aluminum content and boron.

[0071] 0.5g pseudo-boehmite powder (Germany Condea company, trade mark SB), 2.0g borax, 2.2gNaOH and 209.4g concentration are 25 mass % tetraethylammonium hydroxide solution and mix uniformly, then add 40g ultrafine silicon dioxide (manufactured by Cabot Company, brand name CAB-O-SILM-5), stirred evenly, moved into the reaction kettle, crystallized at 140°C for 10 days, and cooled rapidly to 40°C after the crystallization was completed. After the product was centrifuged and washed, the resulting solid was 120 °C and dried for 10 hours to obtain the original powder a of Beta molecular sieve with low aluminum content and boron.

[0072] (2) Preparation of Beta / ZSM-5 composite borosilicate molecular sieve with low aluminum content.

[0073] Mix 3.7g of borax, 0.4g of NaOH, 4.88g of tetraethylammonium hydroxide s...

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Abstract

The invention relates to a method for catalyzing and transforming naphtha with the boiling range of 40-260 DEG C, comprising the following steps: (1) hydrofining the naphtha under the catalysis of hydrofining catalyst, distilling the hydrofined naphtha and cutting the hydrofined naphtha into the light-weight distillate, the middle-weight distillate and the heavy-weight distillate; (2) dischargingthe light-weight distillate from a device or enabling the light-weight distillate to contact with light-hydrocarbon isomerization catalyst for light-hydrocarbon isomerization reaction; (3) dividing the middle-weight distillate into one or a plurality of distillate for segmental refroming reaction; and (4) enabling the heavy-weight distillate to contact with light-weight catalyst for light-weight reaction. By dividing the hydrofined naphtha into a plurality of distillate and processing the distillate by segments with different catalysts, all components of the naphtha can be effectively utilizedand can be transformed to light-weight aromatic hydrocarbon or high-octane gasoline components, the source of the naphtha is widened, and the distillation range of the applied naphtha is enlarged.

Description

technical field [0001] The present invention is a kind of catalytic conversion method of naphtha, specifically, after dividing the naphtha with ASTM D-86 distillation range in the range of 40-260°C into multiple narrow fractions according to the distillation range, Different methods are used to produce aromatics or to produce high-octane gasoline blending components. Background technique [0002] At present, the finished gasoline on the Chinese market is mainly catalytic cracked gasoline, which has high olefin and sulfur content, while catalytically reformed gasoline has low sulfur content and olefin content, which can just make up for this deficiency. With the improvement of gasoline quality requirements, it is necessary to increase the proportion of catalytic reforming and gasoline components. Therefore, increasing the processing capacity of catalytic reforming technology has become an urgent task. In addition, the market demand for aromatics is also increasing, and as t...

Claims

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Application Information

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IPC IPC(8): C10G69/08
Inventor 陈恒芳马爱增任坚强王嘉欣张新宽
Owner CHINA PETROLEUM & CHEM CORP
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