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Crude oil decalcifying agent and preparation method and application thereof

A crude oil decalcifier and decalcifier technology, used in the petroleum industry, refining hydrocarbon oil, refining with metal salts, etc., can solve the problems of high cost, difficult to completely remove, increase crude oil sodium ions, etc., and achieve chemical stability. and high thermal stability, low pollution, easy to operate

Inactive Publication Date: 2020-04-07
广东粤首新科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The decalcification efficiency of chelating decalcification agent is higher, but its cost is higher. Pure organic carboxylic acid or phosphonic acid chelating decalcification agent, in the process of decalcification, due to the low pH value of its drainage, will Serious corrosion of electric desalination equipment and drainage pipelines, which adds great difficulty to the subsequent sewage treatment system
[0006] Precipitation-type decalcifiers generally do not cause corrosion of equipment and pipelines, and drainage has little effect on subsequent sewage treatment devices, but their decalcification effect is not high. Such decalcifiers will generate slightly soluble or insoluble salts. In the case of the water injection volume, it is difficult to completely remove, and the demetallization effect is difficult to be guaranteed
Precipitation decalcifiers also cause secondary fouling of electric desalination equipment and drainage pipelines, and increase crude oil sodium ions, making them not very competitive in the market

Method used

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  • Crude oil decalcifying agent and preparation method and application thereof
  • Crude oil decalcifying agent and preparation method and application thereof
  • Crude oil decalcifying agent and preparation method and application thereof

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preparation example Construction

[0043] The preparation method of the present invention will be further described in detail in conjunction with specific examples below. It should be understood that the following examples are only for illustrating and explaining the present invention, and should not be construed as limiting the protection scope of the present invention. All technologies realized based on the above contents of the present invention are covered within the scope of protection intended by the present invention.

[0044] Unless otherwise specified, the experimental methods used in the following examples are conventional methods; the reagents and materials used in the following examples, unless otherwise specified, can be obtained from commercial sources.

[0045] The hydrolyzed polymaleic anhydride was purchased from Hebei Jinhong Chemical Co., Ltd.

Embodiment 1-7 and comparative example 1-2

[0047] Mix the chelating agent and the precipitating agent, and mechanically stir until a uniform mixing system is obtained to obtain a crude oil decalcifying agent, wherein the composition and content of each component are as described in Table 1.

[0048] Components and content of the crude oil decalcifying agent of table 1-1 embodiment 1-7

[0049]

[0050] Components and content of the crude oil decalcifying agent of comparative example 1-3 of table 1-2

[0051]

Embodiment 8

[0052] Embodiment 8: Injection decalcification agent and demulsifier combined use test

[0053] 1. Configure an oil-soluble demulsifier, including polymer resin, diepoxide, sulfonic acid and solvent oil in a weight ratio of 100:20:3:40. The preparation method includes the following steps:

[0054] (1) Preparation of polymer resin:

[0055] Phenol and formaldehyde are mixed into a mixture according to a weight ratio of 1:1.6, and then water is added to the mixture to prepare an aqueous solution of the mixture. The mass concentration of the mixture in the aqueous solution of the mixture is 40%; then benzenesulfonic acid is added to adjust the pH to about 2.5, React at a temperature of 70°C until the reaction liquid is clear to obtain an alkylphenol-formaldehyde resin;

[0056] After the alkylphenol-formaldehyde resin is cooled to 50°C, propylene oxide and ethylene oxide are sequentially added to react for 1 hour to obtain a polymer resin, wherein the alkylphenol-formaldehyde re...

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Abstract

The invention provides a crude oil decalcifying agent and a preparation method and application thereof. The crude oil decalcifying agent enables decalcified crude oil to meet the requirement of deep processing of crude oil. The crude oil decalcifying agent has the advantages of a chelating type decalcifying agent and a precipitation type decalcifying agent, calcium is firstly removed and dissolvedin a water phase from an oil phase by virtue of a chelating mechanism, then slightly soluble or indissolvable calcium salt is formed by virtue of a precipitation mechanism, and the slightly soluble or indissolvable calcium salt can be discharged along with desalted sewage under the action of a high-voltage electric field and a demulsifying agent. The crude oil decalcifying agent has the advantages of being rapid in reaction and the like, calcium in crude oil can be removed in a short reaction time, and the crude oil decalcifying agent is easy to dissolve in water, has low corrosivity and lowpollution, cannot cause secondary pollution to crude oil products and cannot introduce new impurities.

Description

technical field [0001] The invention belongs to the technical field of crude oil pretreatment, and in particular relates to a crude oil decalcifying agent and a preparation method and application thereof. Background technique [0002] In recent years, with the development of the petroleum industry, the degree of crude oil extraction has gradually deepened, and the acidification of domestic and foreign crude oil has become increasingly serious, and there is a certain correspondence between the metal content in crude oil and its acidity. The increase of the value increases, especially calcium, the calcium content of some crude oil is as high as 200mg / L or more. [0003] Crude oil decalcification has always been a key and difficult issue that must be paid attention to in the refining process of many refineries at home and abroad. It is closely related to the safe operation of desalination process, atmospheric and vacuum, catalytic cracking, hydrocracking and other processes in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G29/08C10G29/10C10G29/20
CPCC10G29/08C10G29/10C10G29/20
Inventor 付海明傅小川
Owner 广东粤首新科技有限公司
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