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Multifunctional desulphurization auxiliary agent of distillate of FCC device and preparation method thereof

A desulfurization additive and distillate oil technology, which is applied in the petroleum industry, refining hydrocarbon oil, etc., can solve the problems of blocked feed pipelines, passivation agents and desulfurizers cannot be used together, and achieve less equipment, low refining costs, and high-quality processes. simple effect

Inactive Publication Date: 2011-11-02
陕西超能石化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some liquid desulfurizers using electrolyte solution are very easy to react with the colloidal passivator used by oil refineries to form precipitates, which block the feed pipeline, making the passivator and desulfurizer unable to share

Method used

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preparation example Construction

[0037] A method for preparing a multifunctional desulfurization aid for distillate oil in an FCC unit, comprising the following sequence and steps:

[0038] a. Under normal pressure conditions of ±40°C, mix 5-8% FCC catalyst excipient protecting agent and 10-15% FCC catalyst heavy metal passivation component with ligand deionized water 30-45% evenly by mass percentage mix

[0039] b. After standing still for 20-30 minutes, add 30-32% rare earth type desulfurization components into the mixture;

[0040] c. After circulating the mixed liquid for 5-10 minutes, add 10-15% pour point depressant components, and recirculate for 5-10 minutes to make a multifunctional desulfurization aid for distillate oil in FCC unit.

[0041] d. Quantitative canning under normal temperature conditions.

[0042] The purpose of the present invention can also be achieved through the following technical solutions:

Embodiment 1

[0044] A preparation method of a multifunctional desulfurization aid for distillate oil of an FCC unit, comprising the following sequence and steps:

[0045] a. Under normal pressure conditions of ±40°C, mix 5% FCC catalyst excipient protecting agent and 10% FCC catalyst heavy metal passivation component with ligand deionized water 45% according to mass percentage

[0046] b. After standing still for 20-30 minutes, add 30% rare earth type desulfurization components into the mixture;

[0047] c. After circulating the mixed solution for 5-10 minutes, add 10% pour point depressant component, and recirculate for 5-10 minutes to make a multi-functional desulfurization aid for distillate oil in the FCC unit.

[0048] d. Quantitative canning under normal temperature conditions.

Embodiment 2

[0050] A preparation method of a multifunctional desulfurization aid for distillate oil of an FCC unit, comprising the following sequence and steps:

[0051] a. Under normal pressure conditions of ±40°C, mix 6% FCC catalyst excipient protecting agent and 12% FCC catalyst heavy metal passivation component with ligand deionized water 40% according to mass percentage

[0052] b. After standing still for 20-30 minutes, add 32% rare earth type desulfurization components into the mixture;

[0053] c. After circulating the mixed solution for 5-10 minutes, add 10% pour point depressant component, and recirculate for 5-10 minutes to make a multi-functional desulfurization aid for distillate oil in the FCC unit.

[0054] d. Quantitative canning at room temperature

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Abstract

The invention relates to a multifunctional desulphurization auxiliary agent of distillate of a FCC device and a preparation method thereof. The auxiliary agent is prepared by mixing inert protective agent for FCC catalytst, FCC catalyst heavy metal passivation component, rare earth desulphurization component, pour point depressing component, and others (ligand deionized water ) under certain conditions, The agent has desulphurization and passivation effects, and can remove sulfur from gasoline and diesel oil with a desulfurization rate of more than 15-50%. By filling 100ppm of the agent in a stationary filling phase, the desulfurization rate can reach to more than 15%, and the desulfurization rate can reach to more than 50% by filling 400ppm of the agent (the desulfurization rate is related to raw oil, operating conditions, filling quantity and the like). The agent also has passivation effect of traditional nickel passivator and vanadium passivator, can effectively passivate nickel and vanadium, and allow the ratio of hydrogen to methane in dry gas to reduce by more than 20-30%. Compared with the hydrogenation technology, the method disclosed in the invention has the advantages ofsmall fixed investment and low operating cost; compared with non-hydrogenation method, the method disclosed in the invention has the advantages of obvious desulphurization effect, good passivation effect, no yield loss, low cost and the like. According to the invention, the sulfide in the distillate is transferred to dry gas or liquefied gas, and enters in a Claus device to carry out desulfurization for sulfur recovery, while in the traditional method, a sulfur transfer agent is used to transfer the sulfide to flue gas so as to cause the secondary environmental pollution, so that the invention has good economic and social benefit.

Description

Technical field: [0001] The invention relates to a multi-functional desulfurization additive for distillate oil of FCC unit and its preparation method, in particular to an additive used for desulfurization of distillate oil of FCC unit and catalyst metal passivation and its preparation method Background technique: [0002] With the increase of heavy and inferior quality of domestic refined oil products, the content of heavy metals in residual oil and heavy oil is very high. During the catalytic cracking process, almost all the heavy metals (mainly nickel and vanadium) in the raw oil are deposited and adsorbed on the catalyst, causing the pollution and poisoning of the catalyst. Under catalytic cracking conditions, the metals (mainly nickel) deposited on the catalyst have a dehydrogenation effect, which increases the content of unsaturated hydrocarbons in the cracking reaction process, greatly increases the hydrogen production in the cracked product dry gas, and reduces the l...

Claims

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Application Information

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IPC IPC(8): C10G29/00
Inventor 张锋杨华汤维
Owner 陕西超能石化科技有限公司