Oil sludge separating agent and oil sludge separating method

By introducing hydroxypropyl-β-cyclodextrin, an oil catcher containing propyl gallate and ethylenediamine disuccinic acid, into the oil sludge separator, and combining it with the flocculation effects of polyacrylamide and polyaluminum chloride, the problem of secondary adsorption of crude oil microspheres in oil sludge treatment was solved, achieving a highly efficient oil sludge separation effect and improving the crude oil recovery rate.

CN122059593AActive Publication Date: 2026-05-19ZHEJIANG MEIBAO IND TECH CO LTD
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Patent Information

Application Number
CN202610534180.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-22
Publication Date
2026-05-19
Estimated Expiration
2046-04-22

AI Technical Summary

Technical Problem

Existing oil sludge treatment technologies are ineffective at removing oil under high liquid content conditions. Crude oil microspheres are easily re-adsorbed onto the surface of mud and sand or embedded inside flocs, resulting in low crude oil recovery rate and high residual oil content in filter residue, which affects economic efficiency and practicality.

Method used

A mixture of propylene glycol block polyether, coagulant, and oil catcher is used. The oil catcher is composed of hydroxypropyl-β-cyclodextrin encapsulating propyl gallate and ethylenediamine disuccinic acid, forming a coating layer through π-π stacking and hydrogen bonding. The long alkyl chain of polycaprolactone promotes oil droplet aggregation. Combined with the flocculation effect of polyacrylamide and polyaluminum chloride, the oil sludge separation effect is improved.

Benefits of technology

It improves the oil removal rate of the sludge separator, reduces the residual oil rate of the filter residue, and achieves efficient separation and recovery of crude oil in the sludge, with a total oil removal rate of over 92.5%.

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Abstract

The invention belongs to the technical field of oil sludge separating agents, and particularly provides an oil sludge separating agent and an oil sludge separating method.The preparation method comprises the following steps that propylene glycol block polyether, a coagulant and an oil trapping agent are mixed and stirred, and the oil sludge separating agent is obtained; the preparation method of the oil trapping agent comprises the following steps: S01, taking polycaprolactone, adding acetone, and carrying out heating dispersion to obtain a solution A; s02, hydroxypropyl-beta-cyclodextrin and propyl gallate are taken, heated, added with water and stirred, then pH is adjusted, ethylenediamine disuccinic acid is added, stirring continues, and a solution B is obtained; and S03, dropwise adding the solution A into the solution B, maintaining stirring until the solution is completely mixed, then performing rotary evaporation, and collecting solid components, thereby obtaining the product. The total deoiling rate of the oil sludge treated by the oil sludge separating agent and the separation method is greater than or equal to 92.5%.
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