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Method and system for processing aluminum chlorate class ionic liquid dead catalysts

An ionic liquid and waste catalyst technology, which is applied in the petrochemical field, can solve the problems such as the unsuitability of ionic liquid waste catalyst treatment, and achieve the effects of promoting industrialization promotion, increasing pollution source emissions, and reducing risks.

Active Publication Date: 2016-04-06
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0006] Since ionic liquid catalysis is a new technology in the field of petrochemical industry, and the resulting by-product - ionic liquid waste catalyst is also a new type of hazardous solid waste in this industry. The waste acid of the existing sulfuric acid alkylation process The regeneration process is not suitable for the treatment of spent ionic liquid catalysts, and there is no feasible treatment method

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  • Method and system for processing aluminum chlorate class ionic liquid dead catalysts
  • Method and system for processing aluminum chlorate class ionic liquid dead catalysts

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Embodiment Construction

[0039] Embodiments of the present invention provide a method for treating spent chloroaluminate-based ionic liquid catalysts, comprising the following steps:

[0040] The spent chloroaluminate-based ionic liquid catalyst is digested-neutralized with an alkaline solution until the system is neutral to weakly alkaline, and a three-phase mixture consisting of water phase / acid-soluble oil phase / floc is obtained;

[0041] The three-phase mixture is fully mixed with the organic coagulant and separated by sedimentation, and the acid-soluble oil phase of the upper layer and the floc phase of the bottom layer are respectively collected;

[0042] Transfer the floc phase to a thickener for concentration to form a concentrated slurry with a water content of 50-60wt%, part of the concentrated and precipitated aqueous solution provides a reaction medium for digestion-neutralization, and part is used for alkaline solution and organic coagulation aid Agent configuration; the concentrated slur...

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Abstract

The invention provides a method and system for processing aluminum chlorate class ionic liquid dead catalysts. The method includes the steps that a three-phase mixture is obtained through a degradation-neutralization reaction; the three-phase mixture and organic coagulant aids are mixed thoroughly and subjected to settling separation, and an acid soluble oil phase and a floc phase are collected respectively; the floc is condensed to form condensed slurry, part of aqueous solution separated out of condensation provides reaction medium for the degradation-neutralization reaction, and part of the aqueous solution is used for preparing an alkali solution and the organic coagulant aids; the condensed slurry is subjected to flocculation again and dehydrated to form dry residues, and the aqueous solution separated out after dehydration takes part in condensation treatment again. The acid soluble oil phase is dehydrated to obtain dehydrated sump oil, and discharged water is all returned. The processing system at least comprises a degradation reactor, a pipeline mixture, a settling separation device, a thickening device, a sump oil degradation tank and a slurry degradation device. The method and system for processing the aluminum chlorate class ionic liquid dead catalysts can lower the activity of catalyst residues. Oil and metal resources can be recycled. Application and popularization of an ionic liquid catalyzing process are promoted.

Description

technical field [0001] The invention specifically relates to a method and a treatment system for treating spent chloroaluminate ionic liquid catalysts, which belong to the field of petrochemical industry. Background technique [0002] The improvement of environmental protection standards in our country has made the demand for clean oil products increase year by year. C4 catalytic alkylation is an important process for producing clean high-octane gasoline blending components (ie, alkylate). Hydrofluoric acid and concentrated sulfuric acid are traditional industrial catalysts for the alkylation process, but their strong corrosiveness poses potential safety hazards to equipment and operators, and a large amount of waste acid slag is generated as a by-product. Taking the sulfuric acid alkylation process as an example, every ton of alkylated oil produced will produce 50-60kg of waste acid residue. The main component of the waste acid residue is sulfuric acid. This kind of hazard...

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Application Information

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IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00
Inventor 陈春茂刘植昌张睿孟祥海徐春明刘海燕
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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