Catalyst for selective hydrogenation olefin removal of reformed oil

A catalyst and oil-generating technology, applied in the field of oil hydrogenation, can solve the problems of poor catalyst stability, short operation period, low processing capacity, etc., and achieve the effects of high reduction degree, reduced residence time, and low reaction temperature

Active Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the operating conditions of this method are mild, the space velocity is low, the throughput is low, and the stability of the catalyst is poor, and the operation cycle is short

Method used

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  • Catalyst for selective hydrogenation olefin removal of reformed oil
  • Catalyst for selective hydrogenation olefin removal of reformed oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Add 1L of deionized water into the reaction tank as the bottom liquid, put 1L of aluminum sulfate solution and 1L of sodium hydroxide solution into the raw material tank respectively, and control the temperature of the reaction tank at 60°C. The aluminum sulfate solution was injected into the reaction tank at a rate of 10 mL / min, while the sodium hydroxide solution was injected and the rate was adjusted to keep the pH value of the reaction tank solution constant at 8.0, and the neutralization was completed after 120 min. In the reaction tank at a constant temperature of 85°C and a constant pH value of 8.5, aging treatment for 5 hours, and then washing with deionized water for 3 times, after filtration, the filter cake was mixed with deionized water and stirred evenly to obtain pseudo-boehmite sol, wherein The solid content is 0.5 g / mL as alumina. Add Y-type molecular sieves to the pseudo-boehmite sol, then add the above mixture into the autoclave, conduct hydrotherm...

Embodiment 2

[0056] (1) Add 1L of deionized water into the reaction tank as the bottom liquid, put 1L of aluminum sulfate solution and 1L of sodium hydroxide solution into the raw material tank respectively, and control the temperature of the reaction tank at 70°C. The aluminum sulfate solution was injected into the reaction tank at a rate of 10 mL / min, while the sodium hydroxide solution was injected and the rate was adjusted to keep the pH value of the reaction tank solution constant at 7.5, and the neutralization was completed after 120 min. In the reaction tank at a constant temperature of 80°C and a constant pH value of 8.5, aging treatment for 5 hours, and then washing with deionized water for 3 times, after filtration, the filter cake was mixed with deionized water and stirred evenly to obtain pseudo-boehmite sol, wherein The solid content is 0.6g / mL in terms of alumina. Add Y-type molecular sieves to the pseudo-boehmite sol, then add the above mixture into a high-pressure reactor, ...

Embodiment 3

[0062] (1) Add 1L of deionized water into the reaction tank as the bottom liquid, put 1L of aluminum sulfate solution and 1L of sodium hydroxide solution into the raw material tank respectively, and control the temperature of the reaction tank at 80°C. The aluminum sulfate solution was injected into the reaction tank at a rate of 10 mL / min, while the sodium hydroxide solution was injected and the rate was adjusted to keep the pH value of the reaction tank solution constant at 7.5, and the neutralization was completed after 120 min. In the reaction tank at a constant 90°C and a constant pH value of 8.0, aging treatment for 5 hours, and then washing with deionized water for 3 times, after filtration, the filter cake was mixed with deionized water and stirred evenly to obtain pseudo-boehmite sol, wherein The solid content is 0.5 g / mL as alumina. Add Y-type molecular sieves to the pseudo-boehmite sol, then add the above mixture into a high-pressure reactor, conduct hydrothermal tr...

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Abstract

A catalyst for selective hydrogenation olefin removal of reformed oil comprises a carrier, an active component and an auxiliary agent, the carrier is a mixture of a molecular sieve and alumina, the active component is Pt and / or Pd, and the auxiliary agent is NiO and / or CoO. The noble metal active component is dispersed on the surface of the catalyst carrier, and the auxiliary metal is dispersed in inner holes and the surface of the catalyst carrier. The preparation method comprises the following steps: adding a molecular sieve into pseudo-boehmite to prepare a mixed carrier, loading palladium and / or platinum, drying, roasting, reducing, and then loading auxiliary metal. The catalyst disclosed by the invention is high in olefin adsorption capacity, favorable for improving the olefin hydrogenation activity and selectivity of the catalyst, good in noble metal dispersity, high in reduction degree and high in catalyst activity, and can be used for performing hydrogenation olefin removal at a relatively low temperature and reducing aromatic hydrocarbon saturation.

Description

technical field [0001] The invention relates to the technical field of hydrogenation of oil products, in particular to a catalyst for selective hydrodeolefination of oil produced after reforming. Background technique [0002] The C6 and C7 fractions in the reformed oil need to be extracted and separated. However, the C6 and C7 fractions contain a certain amount of olefins. On the one hand, these olefins are easy to accumulate in the reflux aromatics during the extraction process, affecting the content of aromatics. On the other hand, they are prone to polymerization and pollute the extraction solvent. At the same time, the olefins undergo oxidation reactions The generation of organic acids causes severe corrosion of extraction system equipment. In addition, if the olefins are not removed, the bromine index and pickling color of aromatic products may fail, and the bromine index and copper corrosion test of solvent oil may fail. [0003] CN1394937A discloses a method for sat...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B01J29/10B01J29/46B01J29/76B01J29/04B01J29/80B01J37/03B01J37/10B01J37/00B01J37/02B01J37/08B01J37/18C10G45/40
CPCB01J29/106B01J29/46B01J29/7615B01J29/044B01J29/80B01J37/038B01J37/10B01J37/0018B01J37/0201B01J37/088B01J37/18C10G45/40Y02P20/52
Inventor刘丽杨成敏段为宇郑步梅郭蓉李扬姚运海周勇孙进
OwnerCHINA PETROLEUM & CHEM CORP