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Pretreating agent for removing oil from crude oil refining sewage and preparation method thereof

A technology of crude oil refining and pretreatment agent, which is applied in the direction of flocculation/sedimentation water/sewage treatment, separation method, grease/oily substance/suspton removal device, etc. It can solve the problem of large impact of downstream sewage treatment plants and sewage treatment of sewage plants Unstable, affecting the ecological balance of industrial development and other issues, to achieve stable treatment and production, facilitate large-scale promotion and application, reduce production costs and product prices

Active Publication Date: 2015-06-03
克拉玛依市天明化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of my country's oil refining industry, the discharge of oil refining sewage is becoming more and more serious. For example, the oily sewage from electric desalination discharged from 10 million tons of oil refineries, and the oily and salty sewage from backwashing of 100,000 m3 oil storage tanks are used for downstream sewage treatment. The impact of the plant is relatively large, making the sewage treatment of the sewage plant unstable, the system disordered, and the sewage treatment unqualified. This situation is common in domestic petrochemical plants and oil refineries, which seriously affects the ecological balance and industrial development.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The technical solution adopted in the present invention is a preparation method of a pretreatment agent used for crude oil refining sewage degreasing, and the steps of the preparation method are:

[0023] (1) Synthesis of small organic cationic monomers:

[0024] Add epichlorohydrin and linear dodecylamine into the closed first reactor with condensing reflux, stir and raise the temperature to 55°C, slowly add industrial dimethylamine solution dropwise into the first reactor, and control The dropping speed of the dimethylamine solution and the flow rate of the circulating cooling water in the reactor are used to control the reaction temperature at 60°C. After the dimethylamine solution is added dropwise, the reaction is stirred and reacted stably for half an hour to obtain small organic cationic monomers.

[0025] (2) Synthesis of multi-block nonionic polyether surfactants:

[0026] Add octadecyl alcohol as the initiator and potassium hydroxide as the catalyst respectiv...

Embodiment 2

[0034] On the basis of Example 1, in order to further improve the utilization rate of raw materials, reduce production costs, and improve product quality, a preferred embodiment of the present invention also includes a preparation method for a pretreatment agent for crude oil refining sewage degreasing, operation The steps are:

[0035] (1) Synthesis of small organic cationic monomers:

[0036] Add epichlorohydrin and octadecylamine into the closed first reactor with condensing reflux, stir and raise the temperature to 65°C, slowly add industrial dimethylamine solution dropwise into the first reactor, and control the dimethyl The dropping speed of the amine solution and the flow rate of the circulating cooling water in the reactor are used to control the reaction temperature at 80°C. After the dimethylamine solution is added dropwise, the reaction is stirred and reacted stably for half an hour to obtain small organic cationic monomers.

[0037] (2) Synthesis of multi-block n...

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PUM

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Abstract

The invention discloses a pretreating agent for removing oil from crude oil refining sewage and a preparation method thereof. The pretreating agent for removing oil from crude oil refining sewage consists of a cationic polymeric flocculant, organic small cations and a segmented nonionic polyether surfactant. The preparation method of the pretreating agent comprises the following steps: (1) synthesizing an organic small cation monomer; (2) synthesizing the segmented nonionic polyether surfactant; (3) compounding to obtain the pretreating agent for removing oil from crude oil refining sewage. According to the preparation method, the production process of the pretreating agent can be finished by using the conventional production equipment, so that the method can be popularized and applied in a large scale, and reaction raw materials can be utilized efficiently. The pretreating agent is stable in quality, the pretreatment of oil removal and COD (Chemical Oxygen Demand) value decrease can be performed efficiently on oil refining salt-containing and oil-containing sewage, and stable and safe running of a sewage treatment system is ensured.

Description

technical field [0001] The invention relates to an oil refinery sewage treatment agent, in particular to a pretreatment agent for degreasing crude oil refinery sewage and a preparation method thereof, belonging to the field of oil refinery sewage treatment. Background technique [0002] With the development of my country's oil refining industry, the discharge of oil refining sewage is becoming more and more serious. For example, the oily sewage from electrical desalination discharged from 10 million tons of oil refineries, and the oily and salty sewage from backwashing of 100,000 m3 oil storage tanks are used for downstream sewage treatment. The impact of the plant is relatively large, making the sewage treatment of the sewage plant unstable, the system disordered, and the sewage treatment unqualified. This situation is common in domestic petrochemical plants and oil refineries, which seriously affects the ecological balance and industrial development. [0003] In order to so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/40C02F1/56
Inventor 王明宪慎娜娜刘莉许海涛杨利吴伟龙郑龙李琼红
Owner 克拉玛依市天明化工有限责任公司