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Technology for recycling nickel from hydrogenation tail oil of slurry bed

A technology of hydrogenated tail oil and suspended bed is applied in the direction of improving process efficiency, which can solve the problems of low metal recovery rate and secondary pollution, and achieve the effects of high purity, high recovery rate and large processing capacity.

Inactive Publication Date: 2016-06-22
台州天天环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a process for recovering nickel in suspension bed hydrogenation tail oil, which solves the problems of low metal recovery rate and secondary pollution in the recovery process in the existing recovery process

Method used

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  • Technology for recycling nickel from hydrogenation tail oil of slurry bed
  • Technology for recycling nickel from hydrogenation tail oil of slurry bed
  • Technology for recycling nickel from hydrogenation tail oil of slurry bed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The present embodiment provides a process for recovering nickel in the suspension bed hydrogenation tail oil, comprising the following steps:

[0038] (1) Take the suspended bed hydrogenation tail oil and pulverize it, pass through a 20-mesh sieve, dry, add n-heptane, the addition of n-heptane is 4ml / g, and obtain n-heptane solubles and n-heptane insolubles;

[0039] (2) Get n-heptane insoluble matter, add toluene, the add-on of toluene is 4ml / g, obtain toluene soluble matter and toluene insoluble matter;

[0040] (3) Take the toluene insoluble matter and carry out blank oxidation roasting at a temperature of 500°C and a roasting time of 3 hours;

[0041] (4) Add 3mol / L sodium carbonate solution to the roasted ash for secondary leaching, the leaching temperature is 70°C, and the leaching time is 60min each time. The ratio is 3:1, and nickel slag is obtained by separation;

[0042] (5) Add 3mol / L hydrochloric acid to nickel slag for acid leaching. The acid leaching tem...

Embodiment 2

[0044] The present embodiment provides a process for recovering nickel in the suspension bed hydrogenation tail oil, comprising the following steps:

[0045] (1) Take the suspended bed hydrogenation tail oil and pulverize it, pass through a 20-mesh sieve, dry, add n-heptane, the addition of n-heptane is 3ml / g, and obtain n-heptane soluble matter and n-heptane insoluble matter;

[0046] (2) get n-heptane insoluble matter, add toluene, the add-on of toluene is 5ml / g, obtain toluene soluble matter and toluene insoluble matter;

[0047] (3) Take the toluene insoluble matter and carry out blank oxidation roasting at a temperature of 550°C and a roasting time of 1 h;

[0048] (4) Add 2mol / L sodium carbonate solution to the roasted ash for secondary leaching, the leaching temperature is 100°C, and the leaching time is 90min each time. The ratio is 4:1, and nickel slag is obtained by separation;

[0049] (5) Add 4mol / L sulfuric acid to nickel slag for acid leaching, the acid leachin...

Embodiment 3

[0051] The present embodiment provides a process for recovering nickel in the suspension bed hydrogenation tail oil, comprising the following steps:

[0052] (1) Take the suspended bed hydrogenation tail oil and pulverize it, pass through a 20-mesh sieve, dry, add n-heptane, the addition of n-heptane is 5ml / g, and obtain n-heptane solubles and n-heptane insolubles;

[0053] (2) Get n-heptane insoluble matter, add toluene, the add-on of toluene is 4ml / g, obtain toluene soluble matter and toluene insoluble matter;

[0054] (3) Take the toluene insoluble matter and carry out blank oxidation roasting at a temperature of 450°C and a roasting time of 5 hours;

[0055] (4) Add 4mol / L sodium carbonate solution to the roasted ash for secondary leaching, the leaching temperature is 40°C, and the leaching time is 60min each time. The ratio is 2:1, and nickel slag is obtained by separation;

[0056] (5) Add 1mol / L nitric acid to nickel slag for acid leaching, the acid leaching temperature...

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Abstract

The invention discloses a technology for recycling nickel from hydrogenation tail oil of a slurry bed and belongs to the technical field of recycling valuable metal from wastes in a petroleum processing technology. The technology comprises the following steps: taking hydrogenation tail oil of the slurry bed, pulverizing, drying, and adding n-heptane so as to obtain n-heptane soluble substances and n-heptane insoluble substances; taking the n-heptane insoluble substances, and adding methylbenzene so as to obtain methylbenzene soluble substances and methylbenzene insoluble substances; carrying out blank oxidation roasting on the methylbenzene insoluble substances at 450-550DEG C for 1-5h; adding alkali liquor into ash produced after roasting, carrying out secondary leaching, and separating to obtain nickel dregs; adding inorganic acid into the nickel dregs, carrying out acid leaching, adding ammonium carbonate into acid leaching liquor, and precipitating so as to obtain nickel carbonate precipitates; and roasting the nickel carbonate precipitates obtained so as to obtain nickel oxide products. The technology is characterized by high in raw material adaptability, large in processing quantity, free of new pollutants in processing process, high in rate of recycling nickel from raw materials and high in nickel purity.

Description

technical field [0001] The invention relates to the technical field of recovering valuable metals from waste in petroleum processing technology, in particular to a process for recovering nickel in suspended bed hydrogenation tail oil. Background technique [0002] At present, catalysts containing metal nickel are commonly used in the petroleum and petrochemical industry to hydrotreat heavy oil. With the long-term use of catalysts and the continuous deterioration of crude oil, a large number of deactivated catalysts are deposited in the tail oil. The suspension bed hydrogenation process of low-quality heavy oil is just a process for processing low-quality crude oil with high metal, high asphaltenes and high sulfur content. Due to the difference in processing raw materials, 10%-30% of tail oil products will be produced. Therefore, tail oil has become an important secondary resource to recover nickel metal. Nickel is mainly used to produce nickel steel and alloys. Nickel can i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/00C22B1/02
CPCC22B1/02C22B7/007C22B7/008C22B7/009C22B23/0407C22B23/0461Y02P10/20
Inventor 侯影飞程强吴波李传邓文安谢海华张会娟刘敏
Owner 台州天天环保科技有限公司
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