Unlock instant, AI-driven research and patent intelligence for your innovation.

Demetallization treatment method of FCC waste catalyst

A waste catalyst and treatment method technology, applied in the direction of grain treatment, solid waste removal, etc., can solve the problems of high economic cost, complicated demetallization process, and large environmental pollution, so as to improve treatment efficiency, protect the environment and economically sustainable The effect of sustainable development

Active Publication Date: 2021-12-17
CHINA PETROLEUM & CHEM CORP +1
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a demetallization treatment method for FCC spent catalysts in order to overcome the problems of complex demetallization process, low metal removal rate, large environmental pollution and high economic cost in the prior art. The method can obtain low-magnetic materials with low pollution metal content, realize the demetallization purpose of FCC waste catalyst, and has simple process, low production cost, strong regional adaptability, safety and environmental protection

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1) Grind 10kg of spent FCC catalyst with a ball mill until Dv(90) is 10 μm.

[0044] 2) Add the ground material into 40kg of water to prepare a suspension with a concentration of 20% by weight.

[0045] 3) Wet magnetic separation is carried out under the condition that the magnetic field intensity is 2T and the magnetic field gradient on the surface of the magnetic medium is about 100000T / m. The suspension is injected into the magnetic separator for magnetic separation and separation. The highly magnetic particles in the slurry are adsorbed on the surface of the magnetic medium, brought to the top non-magnetic field area by the rotary ring, and washed into the collection tank of the high magnetic material by the washing water. Low magnetic and non-magnetic particles pass through the magnetic medium under the action of gravity and fluid force, and enter the collection tank of low magnetic materials.

[0046] 4) Vacuum-filter the obtained high-magnetic slurry and low-mag...

Embodiment 2

[0051] 1) 50 kg of spent FCC catalyst was pulverized by an impact mill until Dv(90) was 20 μm.

[0052] 2) Add the ground material into 75kg of water to prepare a suspension with a concentration of 40% by weight.

[0053] 3) Wet magnetic separation is carried out under the condition that the magnetic field intensity is 0.8T and the magnetic field gradient on the surface of the magnetic medium is about 100T / m. The suspension is injected into the magnetic separator for magnetic separation and separation. The highly magnetic particles in the slurry are adsorbed on the surface of the magnetic medium, brought to the top non-magnetic field area by the rotary ring, and washed into the collection tank of the high magnetic material by the washing water. Low magnetic and non-magnetic particles pass through the magnetic medium under the action of gravity and fluid force, and enter the collection tank of low magnetic materials.

[0054] 4) The obtained high-magnetic slurry and low-magnet...

Embodiment 3

[0059] Carry out according to the method for embodiment 1, difference is, in step 1) the particle ball milling of spent catalyst to Dv (90) is 5 μm; Step 2) is prepared into the suspension that concentration is 30% by weight, obtains high in the same way Magnetic materials and low magnetic materials.

[0060] Among them, the yields of high-magnetic materials and low-magnetic materials and the contents of V and Ni in each material are shown in Table 3.

[0061] table 3

[0062] Material name Yield / % V content / ppm Ni content / ppm raw material 100 7200 7500 High magnetic material 14 41300 48500 Low magnetic material 82 750 550

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the field of catalyst recycling, and discloses a demetallization treatment method of an FCC waste catalyst. The method comprises the following steps that (1) the FCC waste catalyst is crushed to obtain a crushed FCC waste catalyst; (2) the crushed FCC waste catalyst is mixed with water to obtain a suspension; and (3) the suspension obtained in the step (2) is subjected to magnetic separation, and the Dv (90) value of the crushed FCC waste catalyst is 25 micrometers or below through crushing treatment. Through the method, a low-magnetic material with a low pollution metal content can be obtained, the aim of demetallization of the FCC waste catalyst is achieved, the process is simple, the production cost is low, regional adaptability is high, and safety and environmental protection are achieved.

Description

technical field [0001] The invention relates to the field of catalyst recovery and utilization, in particular to a demetallization treatment method for FCC spent catalysts. Background technique [0002] FCC catalyst is the most used catalyst in petroleum processing. With the continuous recycling of the catalyst, metal elements in crude oil are continuously deposited on the surface of the catalyst, causing metal poisoning of the catalyst, and greatly reducing the catalytic cracking activity and selectivity of the catalyst. Therefore, this catalyst with high metal content and reduced activity and selectivity must be periodically discharged to form FCC spent catalyst. Contaminating metals in FCC spent catalysts include V, Fe, Ni, Cu, etc., among which V and Ni are more harmful elements. FCC waste catalysts are HW50 hazardous wastes stipulated in the "National Hazardous Waste List" (2016 Edition). A large number of FCC waste catalysts are produced every year, and the harmless t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B02C23/08B02C17/10B02C19/06
CPCB09B3/00B02C23/08B02C17/10B02C19/06Y02P10/20
Inventor 任靖于金海吕岩祝平张南
Owner CHINA PETROLEUM & CHEM CORP