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Process for Wet Recovery of Iron, Aluminum, Nickel, Molybdenum and Cobalt from Hydrotreating Spent Catalysts

A waste catalyst, hydrogenation refining technology, applied in the direction of photographic process, photographic auxiliary process, process efficiency improvement, etc., can solve the problem that the waste liquid is difficult to be reused directly, and achieve full recovery, good economic benefits, and pollution elimination Effect

Active Publication Date: 2022-03-25
河南锦壕环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And at the same time, the by-product sulfuric acid solution can be continuously recycled in the system, which solves the problem that the traditional intermittent reaction acid waste solution is difficult to directly reuse

Method used

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  • Process for Wet Recovery of Iron, Aluminum, Nickel, Molybdenum and Cobalt from Hydrotreating Spent Catalysts
  • Process for Wet Recovery of Iron, Aluminum, Nickel, Molybdenum and Cobalt from Hydrotreating Spent Catalysts
  • Process for Wet Recovery of Iron, Aluminum, Nickel, Molybdenum and Cobalt from Hydrotreating Spent Catalysts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) 1000g spent catalyst is first calcined at 550°C ((by mass fraction (%), wherein MoO 3 content 15%, Co content 10%, NiO content 10%, Al 2 o 3 The content is 60%, Fe 2 o 3 content is 5%), after cooling, the catalyst is pulverized into 1200 mesh powder, which is divided into 5 parts on average, and 1 part of the powder is put into the fatty alcohol (such as: C8-10 alcohol) with a concentration of 3g / L earlier to carry out For foam flotation, the flotation catalyst is subjected to centrifugal defoaming at a speed of 700 rpm, and the defoamed catalyst is subjected to acid leaching. The acid leaching temperature is about 50°C, and the concentration of acid (sulfuric acid) is 3mol / L. The soaking time is 2 hours, filter, and the filter residue is set aside;

[0039] (2) the filtrate after filtration is utilized the concentration of alkali (caustic soda) to be the alkali solution of 5g / L to adjust the pH value, respectively adjusts the pH=5 of aluminum, the pH=3 of iron,...

Embodiment 2

[0047] Replace Ni=15V; Co=40V in Example 1 with Ni=10V; Co=30V. The scheme: the total recovery rate of molybdenum is 99.2%, the total recovery rate of nickel is 98.5%, the total recovery rate of cobalt is 97.9%, the total recovery rate of iron is 98.9%, and the recovery rate of aluminum is 99.0%.

Embodiment 3

[0049] Add NH in the embodiment one 4 The concentration of F and HF solution is 3g / L, instead of adding NH 4 F and HF solution concentration is 2g / L. The scheme: the total recovery rate of molybdenum is 97.6%, the total recovery rate of nickel is 98.8%, the recovery rate of cobalt is 98%, the total recovery rate of iron is 98.4%, and the recovery rate of aluminum is 99.4%.

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Abstract

The invention discloses a process for wet recovery of iron, aluminum, nickel, molybdenum and cobalt from hydrorefining waste catalysts. After the catalysts are calcined and ground, they are roughed by foam flotation, and the roughed catalysts are washed with dilute sulfuric acid. Dipping, filtration, molybdenum-containing filter residue enters the next process, the filtrate is precipitated step by step, iron and aluminum are separated, and then the filtered solution is electrolyzed with an anion exchange resin and an electrolytic cell, and the cathode of the electrolytic cell can recover high-purity nickel With cobalt metal, the anode recovers the sulfuric acid solution under the action of the anion exchange resin. The molybdenum-containing filter residue is dissolved in the recovered sulfuric acid for electrolysis, and the cathode can obtain high-purity molybdenum metal, and the anode can recover sulfuric acid solution under the action of anion exchange resin. The recovery efficiency of the catalyst is not only high, but also there is no waste liquid discharge, and the sulfuric acid can be recycled without introducing other elements. It has the advantages of simple and efficient process, high economic value, high atom utilization rate, and no impact on the environment.

Description

technical field [0001] The invention relates to the technical field of catalyst recovery. It relates to a process for wet recovery of iron, aluminum, nickel, molybdenum and cobalt from hydrorefining spent catalysts, in particular to a method for wet recovery of iron, aluminum, nickel, molybdenum and cobalt from nickel-molybdenum catalysts, the method The recovery rate is higher. Background technique [0002] Due to the rapid development of science and technology, economic development is largely at the expense of natural resources and the ecological environment. Almost 80% of the chemical reactions in the chemical and petroleum industries, which have developed rapidly since the last century, use catalysts. Thousands of tons of molybdenum-containing waste catalysts are unloaded from the device every year, so the recovery and utilization of valuable metals in waste catalysts has attracted much attention. [0003] As an alloy additive of iron, molybdenum helps to form a compl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B21/00C22B23/00C25C1/06
CPCC22B7/009C22B7/007C22B21/003C22B23/043C25C1/06Y02P10/20
Inventor 鲁墨弘张朋张伟李明时
Owner 河南锦壕环境科技有限公司