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Phase transfer agent for removing heavy metals from medium and low temperature coal tar, and application thereof

A technology of low-temperature coal tar and phase transfer agent, which is applied in tar processing by distillation method and tar refining by chemical method, etc., can solve the problems of few phase transfer agents and few demetallizing agents in the method of removing, and achieves a good solution. Conducive to safe, stable and long-term operation, reduced processing capacity, and reduced process costs

Inactive Publication Date: 2015-12-23
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] At present, there are many demetallization agents for crude oil, but few for coal tar, especially methods and phase transfer agents for removing metallic iron and calcium in coal tar

Method used

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  • Phase transfer agent for removing heavy metals from medium and low temperature coal tar, and application thereof
  • Phase transfer agent for removing heavy metals from medium and low temperature coal tar, and application thereof
  • Phase transfer agent for removing heavy metals from medium and low temperature coal tar, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The phase transfer agent used in this embodiment is made up of the raw materials of following mass ratio:

[0039]

[0040] Wherein: organic acid is the mixed solution that the malonic acid of 38% by weight, the maleic acid of 33% by weight and the tartaric acid of 29% by weight are formed; A mixed solution composed of bisphosphonic acid; the surfactant is a mixed solution composed of 70% by weight of polypropylene glycol and 30% by weight of diglycolamine, and the number-average molecular weight of polypropylene glycol is 1000-2500; the corrosion inhibitor is potassium iodide .

[0041] The conditions of electro-desalting are: electro-de-salting temperature is 120°C, electric field strength is 1800v / cm, residence time is 30min, and the injection amount of phase transfer agent is 200μg / g, that is, 200μg of phase transfer agent per gram of heavy oil, note The amount of water is 8% of the mass of heavy oil.

[0042] In this embodiment, the total iron removal rate and...

Embodiment 2

[0044] The phase transfer agent used in this embodiment is made up of the raw materials of following mass ratio:

[0045]

[0046]

[0047] Wherein: the organic acid is a mixture of 35% by weight of malonic acid, 35% by weight of maleic acid and 30% by weight of tartaric acid; the chelating agent is 70% by weight of aminotriacetic acid and 30% by weight of ethylene glycol A mixed solution composed of amine tetramethylene phosphonic acid; the surfactant is a mixed solution composed of 75% by weight of polypropylene glycol and 25% by weight of diglycolamine, and the number average molecular weight of polypropylene glycol is 1000-2500; corrosion inhibitor Potassium iodide is used.

[0048] The conditions of electro-desalting are: electro-de-salting temperature is 120°C, electric field strength is 1800v / cm, residence time is 30min, and the injection amount of phase transfer agent is 200μg / g, that is, 200μg of phase transfer agent per gram of heavy oil, note The amount of wa...

Embodiment 3

[0051] The phase transfer agent used in this embodiment is made up of the raw materials of following mass ratio:

[0052]

[0053] Wherein: organic acid is the mixed solution that the malonic acid of 36% by weight, the maleic acid of 35% by weight and the tartaric acid of 29% by weight form; A mixed solution composed of trisodium diamine triacetic acid and 40% by weight of aminotrimethylene phosphonic acid; the surfactant is 80% by weight of polypropylene glycol and 20% by weight of diglycolamine; the corrosion inhibitor is potassium iodide.

[0054] The conditions of electro-desalting are: electro-de-salting temperature is 120°C, electric field strength is 1800v / cm, residence time is 30min, and the injection amount of phase transfer agent is 300μg / g, that is, 300μg of phase transfer agent per gram of heavy oil, note The amount of water is 8% of the mass of heavy oil.

[0055] In this embodiment, the total iron removal rate and calcium removal rate of the final coal tar we...

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Abstract

The invention provides a phase transfer agent for removing heavy metals from coal tar at a medium and low temperature, and an application thereof. The phase transfer agent comprises 20-50wt% of an organic acid, 30-55wt% of a chelating agent, 10-30wt% of a surfactant, 1-4wt% of a corrosion inhibitor, and the balance of water. The phase transfer agent can effectively transfer oil-soluble Fe and Ca elements in medium and low temperature coal tar heavy oil to water-soluble Fe and Ca and pertinently transfer ferroporphyrin to water-soluble iron in order to well remove Fe and Ca metal elements in the coal tar. The phase transfer agent is in favor of realizing safe, stable and long-term running of an electric desalination device when the phase transfer agent is used in removal of heavy metals from the medium and low temperature coal tar, the total iron removal rate and the total calcium removal rate respectively reaches 95% or above, the ferroporphyrin removal rate reaches 95% or above, and damages to catalytic hydrogenation and other subsequent treatment processes are effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of coal tar treatment, in particular to a phase transfer agent for removing heavy metals from medium and low temperature coal tar and its application. Background technique [0002] At present, China and the whole world are facing the problem of energy shortage. China is one of the largest coal-producing countries in the world. With the rapid economic development, China has become the world's largest energy consumer. At the same time, the market's demand for petroleum products is increasing, and the shortage of crude oil supply is becoming increasingly prominent. It is imperative to seek new alternative energy sources. Row. The energy structure dominated by coal will be difficult to change for a long time in the future. Therefore, the efficient utilization of coal has received extensive attention and research. It is imminent to seek new fuel energy, and Shaanxi and northern Shaanxi produce a large amount o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C1/20C10C1/04
Inventor 李冬王磊李稳宏
Owner NORTHWEST UNIV(CN)
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