Method for the hydrogenation conversion of naphthenes

A technology for hydrogen conversion and cycloalkane, which is applied in chemical instruments and methods, treatment of hydrocarbon oil, refining hydrocarbon oil, etc. It can solve the problems of poor selectivity and low activity of cyclohexane conversion, and achieve the reduction of strong acid centers and cracking selection Sex, reduce the effect of carbon deposition reaction

Active Publication Date: 2020-09-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the prior art has the problems of low cyclohexane conversion activity and poor selectivity, and provides a method for the hydrogen conversion of cycloalkane

Method used

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  • Method for the hydrogenation conversion of naphthenes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] SiO 2 / Al 2 o 3 25 mordenite 195g with γ-Al 2 o 3 Mix 107.1g evenly, then add dilute nitric acid and safflower powder, knead evenly, extrude into strips, roast to make a carrier, cut into pellets and place in an impregnation container. The metal precursor iridium chloride was dissolved in water, mixed evenly, impregnated with the surface of the carrier, dried at 120°C for 4 hours, and calcined at 500°C for 3 hours to prepare the catalyst HC-5.

[0034] In a fixed-bed reactor, install 20 grams of catalyst HC-5, feed hydrogen, heat up to 400°C, purging for two hours for reduction activation, the reaction temperature is 400°C, the pressure is 3MPa, according to WHSV=2.5h -1 Working condition feed, hydrogen hydrocarbon molecular ratio 3.0. Raw material cyclohexane. The catalyst reaction performance results are shown in Table 1. The catalyst reaction remained stable for 300 hours.

Embodiment 2

[0036] SiO 2 / Al 2 o 3 25 mordenite 195g with γ-Al 2 o 3Mix 107.1g evenly, then add dilute nitric acid and safflower powder, knead evenly, extrude into strips, roast to make a carrier, cut into pellets and place in an impregnation container. The metal precursor nickel nitrate was dissolved in water, mixed evenly, impregnated with the surface of the carrier, dried at 120°C for 4 hours, and calcined at 500°C for 3 hours to prepare the catalyst HC-6.

[0037] In a fixed-bed reactor, install 20 grams of catalyst HC-6, feed hydrogen, heat up to 400°C, purging for two hours for reduction activation, the reaction temperature is 400°C, the pressure is 3MPa, according to WHSV=2.5h -1 Working condition feed, hydrogen hydrocarbon molecular ratio 3.0. Raw material cyclohexane. The catalyst reaction performance results are shown in Table 1. The catalyst reaction remained stable for 300 hours.

Embodiment 3

[0039] SiO 2 / Al 2 o 3 25 mordenite 195g with γ-Al 2 o 3 Mix 107.1g evenly, then add dilute nitric acid and safflower powder, knead evenly, extrude into strips, roast to make a carrier, cut into pellets and place in an impregnation container. The metal precursor nickel nitrate was dissolved in water, mixed evenly, impregnated with the surface of the carrier, dried at 120°C for 4 hours, and calcined at 500°C for 3 hours to prepare the catalyst HC-7.

[0040] In a fixed-bed reactor, install 20 grams of catalyst HC-7, feed hydrogen, heat up to 400°C, purging for two hours for reduction activation, the reaction temperature is 400°C, the pressure is 3MPa, according to WHSV=2.5h -1 Working condition feed, hydrogen hydrocarbon molecular ratio 3.0. Raw material cyclohexane. The catalyst reaction performance results are shown in Table 1. The catalyst reaction remained stable for 300 hours.

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Abstract

The invention relates to a method for hydrogenation conversion of naphthenic hydrocarbon. The problems of a low conversion rate and poor selectivity of C6 and C7 conversion catalysts in the prior artare mainly solved. The method comprises the step of forming a C1-C5 light component by contacting a naphthenic hydrocarbon raw material with a catalyst under reaction conditions; the catalyst comprises, by weight, 20-80 parts of at least one zeolite selected from the group consisting of mordenite, ZSM-5, beta zeolite and Y zeolite, 0.05-5 parts of at least one auxiliary selected from the group consisting of nickel, zinc, strontium, magnesium and iridium or iridium oxide and 10-40 parts of binder. According to the technical scheme, the problems are better solved, and the method can be used in industrial production of conversion of naphthenic hydrocarbon.

Description

technical field [0001] The invention relates to a method for the hydrogenation conversion of naphthenes. Background technique [0002] Cetane number is an important indicator of diesel combustion performance. In the diesel fraction, the cetane number is sorted according to paraffins > naphthenes > aromatics. Hydrodearomatization is an important technology commonly used to increase the cetane number of diesel oil. In the presence of monocyclic and polycyclic aromatic hydrocarbons, hydrogenation saturation, isomerization, ring opening and cracking reactions occur on noble metal catalysts. Under normal circumstances, the hydrogenation performance of noble metals is strong, and aromatic hydrocarbons are easy to be deeply hydrogenated to form small molecules C 3 -C 5 , and even generate gaseous methane and ethane, which increases hydrogen consumption and is not conducive to improving the cetane number of diesel oil. Therefore, it is very important to control the ring-o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/22B01J29/24B01J29/18B01J29/46B01J29/76C10G45/64
CPCB01J29/18B01J29/185B01J29/22B01J29/24B01J29/46B01J29/7615B01J2229/186C10G45/64C10G2300/1081
Inventor 王晓晨李经球孔德金
Owner CHINA PETROLEUM & CHEM CORP
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