Complexing agent for removing metal and ash in coal tar and use method thereof

A technology of coal tar and compounding agent, which is applied in the petroleum industry, refining hydrocarbon oil, and only multi-stage serial refining process treatment, etc., can solve the problems of large amount of demetallization agent, limited functional groups, and low removal rate, and achieve the expected Good treatment effect, simple operation, and the effect of improving the removal rate

Inactive Publication Date: 2016-03-02
LUOYANG PETROCHEMICAL ENG CORP SINOPEC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a compound agent for removing metal and ash in coal tar and its use method, to overcome the problems of large amount of demetallizer, low removal rate and limited functional groups in the prior art, and to avoid the problems of existing demetallization agents. Problems such as equipment corrosion caused by metal agents

Method used

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  • Complexing agent for removing metal and ash in coal tar and use method thereof
  • Complexing agent for removing metal and ash in coal tar and use method thereof
  • Complexing agent for removing metal and ash in coal tar and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Compound agent DM1, its composition is A: disodium edetate 50%; B: oxalic acid 20%; C: dodecylbenzenesulfonic acid 10%; D: hydroxyethylidene diphosphonic acid 5%; E: water 15%

[0034] The above active agent A, synergist B, asphalt colloidal dispersant C, corrosion inhibitor D, and auxiliary agent E were prepared according to weight percentage, and stirred and reacted at 60°C for 30 minutes to obtain the metal and ash removal product in coal tar. Complex agent DM1.

[0035] The coal tar in this embodiment is Shaanxi low-temperature coal tar. The coal tar is a black waxy substance, opaque, and has a pungent and unpleasant taste. Inferior oil products with high content of , asphaltenes and aromatics, and coal tar contains a large number of impurity elements that are not conducive to subsequent hydroprocessing. The coal tar has a water content of about 2%, a salt content of 10mg / L, a relatively high calcium and iron content in the metal content of 109μg / g and 37.7μg / g, a...

Embodiment 2

[0041] Compound agent DM2, its composition is A: disodium edetate 60%; B: maleic anhydride 25%; C: dodecylbenzenesulfonic acid 5%; D: hydroxyethylidene diphosphonic acid 5%; E: Water 5%.

[0042] The preparation method of composite agent DM2 is the same as DM1 in Example 1, and in addition, the test oil is also the same as Example 1. Inject the demulsifier GT940 20ppm into the coal tar, add fresh water 10%wt, mix evenly, preheat to 80°C and enter the three-phase centrifuge for high-speed centrifugation, the centrifugation speed is 3000r / min, and the centrifugation time is 6min; centrifugation The final coal tar raw material is mixed with complex agent DM2, demulsifier GT940 and water, further heated to 120°C, and reacted for 30 minutes; then desalted and dehydrated by electricity to obtain treated raw material oil. The electric desalination conditions are: electric desalination temperature 120°C, residence time 30min, electric field strength 700V / cm, demulsifier GT940 dosage ...

Embodiment 3

[0046] The composite agent DM3 is composed of A: 65% sodium hexametaphosphate; B: 20% oxalic acid; C: 5% dodecylbenzenesulfonic acid; D: 5% aminotrimethylene phosphonic acid; E: 5% water.

[0047] The preparation of composite agent DM3 is the same as DM1 in Example 1, and the test oil is also the same as Example 1. Inject fresh water 10%wt, demulsifier ERI116020ppm into this coal tar, after mixing evenly, preheat to 80 ℃ and enter three-phase centrifuge to carry out high-speed centrifugation, centrifugation speed is 3000r / min, centrifugation time is 6min; After centrifugation The coal tar raw material is mixed with complex agent DM3, demulsifier ERI1160 and water, further heated to 120°C, and reacted for 30 minutes; then desalted and dehydrated by electricity to obtain treated raw material oil. The electric desalination conditions are: electric desalination temperature 120°C, residence time 30min, electric field strength 700V / cm, demulsifier ER11160 dosage 20ppm, electric desa...

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Abstract

The invention discloses a complexing agent for removing metal and ash in coal tar and a use method thereof. The problems that in the prior art, the use amount of a demetallization agent is large, the removal rate is low, and functional groups are limited are solved. The complexing agent is prepared from, by weight, 40%-70% of active agent, 15%-35% of synergist, 5%-15% of pitch colloid dispersant, 1%-10% of corrosion inhibitor and 5%-20% of auxiliary. The complexing agent for removing metal and ash in coal tar is suitable for the fields of coal tar pre-treatment and deep processing. By means of the complexing agent and the method, the use amount of the complexing agent is small, removal efficiency is high, the preparation process is simple, and the use method is convenient.

Description

technical field [0001] The invention belongs to the field of coal tar processing, and in particular relates to a composite agent for removing metal and ash from coal tar and a use method thereof. Background technique [0002] With the development of economy and society and the increasing shortage of petroleum resources, the efficient development and utilization of coal has gradually attracted attention. At the same time, the by-product coal tar will be obtained in the process of coal coking, dry distillation or gasification, and its output is on the rise. At present, my country's coal tar processing technology level is low, there are few high value-added products, the price is low, a large number of heterocyclic and condensed ring compounds have not been recovered and utilized, high energy consumption and serious environmental pollution. With the country's strict environmental protection laws and regulations, it is imperative to rationally develop and utilize coal tar, espe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/02C10G29/24C10G29/28
Inventor 唐应彪崔新安袁海欣李朝法刘家国邹洋许兰飞
Owner LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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