Preparation process of demulsifier for sulfur-containing coking wastewater

A preparation process and demulsifier technology are applied in the field of preparation of coking sulfur-containing sewage demulsifier, which can solve problems such as oil-carrying, achieve strong demulsification, improve oil-water separation ability, and reduce oil content.

Inactive Publication Date: 2017-01-04
洛阳市华工实业有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a preparation process of coking sulfur-containing sewage demulsifier, effectively solve the problem of oily sulfur-containing sewage in domestic delayed coking units, and carry out the structure of the demulsifier In order to adjust and introduce cationic functional groups, it not only has a strong demulsification effect on the oil-in-water emulsion in wastewater, but also has a certain extraction ability, which can significantly improve the ability of oil-water separation, achieve the effect of purifying sewage, and reduce Oil content of sewage discharge

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The first step is to prepare polyester initiator: use long carbon chain organic acid and polyethylene polyamine to carry out polycondensation reaction in the presence of aromatic hydrocarbon solvent, heat while polycondensation reaction, gradually raise the temperature to 180 ° C ~ 250 ° C, keep reflux, The reflux adopts negative pressure distillation to remove the water and aromatic hydrocarbon solvent generated by the reaction to obtain the polyester initiator;

[0020] The second step is to prepare ethylene oxide-propylene oxide block copolymer: under negative pressure, add propylene oxide and ethylene oxide to the polyester initiator in sequence to control the propylene oxide and ethylene oxide. The addition rate of alkane keeps the reaction temperature at 120°C to 150°C, and the reaction pressure at no higher than 0.25MPa, so as to ensure uniform and smooth reaction, and obtain ethylene oxide-propylene oxide block copolymer;

[0021] The third step is to prepare a ...

Embodiment 2

[0024] The long carbon chain organic acid is oleic acid or stearic acid, the long carbon chain organic acid accounts for 30-35% of the total mass of the first-step reactant, and the polyethylene polyamine accounts for 40-45% of the total mass of the first-step reactant. %, the aromatic hydrocarbon solvent accounts for 20% to 30% of the total mass of the first step reactant, and the total mass of the first step reactant refers to the total mass of the long carbon chain organic acid, polyethylene polyamine and aromatic hydrocarbon solvent. The sum of the proportions by weight of each component in the one-step reactant is 100%.

Embodiment 3

[0026] The propylene oxide accounts for 60-65% of the total mass of the reactants in the second step, the ethylene oxide accounts for 34.5-39.8% of the total mass of the reactants in the second step, and the polyester initiator accounts for the second step 0.2~0.5% of the total mass of the reactant, the total mass of the reactant in the second step refers to the total mass of the polyester starter, propylene oxide and ethylene oxide, and the components are formulated by weight in the second step reactant The sum of the ratios is 100%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a preparation process of a demulsifier for sulfur-containing coking wastewater. The preparation process comprises steps as follows: Step one, long carbon chain organic acid and polyethylene polyamine are subjected to a condensation polymerization reaction in the presence of an aromatic hydrocarbon solvent, reflux is kept, and a polyester initiator is prepared; Step two, propylene epoxide and ethylene oxide are added to the polyester initiator sequentially, and an ethylene oxide-epoxypropane segmented copolymer is prepared; Step three, lauryl ammonium chloride and an alkaline-earth metal catalyst are added to the ethylene oxide-epoxypropane segmented copolymer, and a polymer containing cation function groups is prepared; Step four, a nonionic surfactant, deionized water or alcohol is added to the polymer which contains the cation function groups and is prepared in the Step three, and a finished product of the demulsifier for the sulfur-containing coking wastewater is prepared; an oil-in-water type emulsified liquid in the wastewater not only has a good demulsification function, but also has certain extraction capability, the oil-water separation capability can be remarkably improved, the wastewater purification effect is realized, and the oil content of sewage discharge is reduced.

Description

technical field [0001] The invention relates to a preparation technology of a sulfur-containing sewage demulsifier added in a coking device of an oil refinery, in particular to a preparation process of a coking sulfur-containing sewage demulsifier. Background technique [0002] Coking sulfur-containing sewage has problems such as sewage emulsification, large fluctuations in sewage, high oil content in sewage, and poor contact with the oil-gas separation tank on the top of the cooling tower. As a result, the oil content of domestic coking sulfur-containing sewage is above 1000mg / L, sometimes reaching About 10000mg / L. [0003] The sulfur-containing sewage of the delayed coking unit mainly includes: the top sewage of the coking fractionation tower, the sewage at the top of the contact cooling tower, and the sewage of the absorbed stable part; especially the sulfur-containing sewage discharged from the top of the contact cooling tower is severely emulsified and cannot meet the d...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/333C02F1/00C02F103/36
CPCC02F1/00C02F2103/365C08G65/333
Inventor 陆兵赵小青贾建强许林鹏袁现章
Owner 洛阳市华工实业有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap