Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Treatment method for oil product refining waste alkaline solution

A treatment method and technology of waste lye, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems that are not used as inspection indicators, and achieve reduction of reagent usage, Achieve zero discharge, reduce phenol concentration and COD effect

Active Publication Date: 2015-11-04
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional treatment method only examines the removal effect of COD and sulfide in waste caustic soda, and does not take the removal of organic nitrogen contained in it as an investigation index.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Treatment method for oil product refining waste alkaline solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A stock of gasoline waste lye, its COD is 536000mg / L, S 2- The concentration is 12700mg / L, the phenol concentration is 196000mg / L, the sodium carbonate concentration is 23760mg / L, the sodium hydroxide concentration is 2.6wt%, and the oil is 190mgL. A waste lye containing organic nitrogen liquid hydrocarbon, its COD is 179000mg / L, the organic nitrogen concentration is 8730mg / L, S 2- The concentration is 35800mg / l, the phenol concentration is 32300mg / L, the sodium carbonate concentration is 10800mg / L, the sodium hydroxide concentration is 3.5wt%, and the oil is 150mg / L. The method of the present invention is used for treatment under the following conditions:

[0035] (1) Acidification and neutralization: Add concentrated sulfuric acid to the spent lye of gasoline. When the pH value of the spent lye is 3-4, stop adding acid, stir for 30 minutes, and stand still for 24 hours. After acidification, the waste lye is divided into upper and lower layers. The upper layer is organic ...

Embodiment 2

[0043] A stock of gasoline waste lye, its COD is 396800mg / L, S 2- The concentration is 9360mg / l, the phenol concentration is 147000mg / L, the sodium carbonate concentration is 18390mg / L, the sodium hydroxide concentration is 2.9wt%, and the oil is 173mgL. A waste lye containing organic nitrogen liquid hydrocarbon, its COD is 158200mg / L, the organic nitrogen concentration is 7240mg / L, S 2- The concentration is 29320mg / l, the phenol concentration is 28240mg / L, the sodium carbonate concentration is 9920mg / L, the sodium hydroxide concentration is 3.8wt%, and the oil concentration is 135mg / L. The method of the present invention is used for treatment under the following conditions:

[0044] (1) Acidification and neutralization: Add concentrated sulfuric acid to the waste lye of gasoline. When the pH value of the waste lye is 5-6, stop adding acid, stir for 30 minutes, and stand still for 24 hours. After acidification, the waste lye is divided into upper and lower layers. The upper l...

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

PropertyMeasurementUnit
clearance rateaaaaaaaaaa
Login to View More

Abstract

The invention discloses a treatment method for an oil product refining waste alkaline solution. The treatment method comprises the steps of (1) adding sulfuric acid to acidize a waste gasoline alkaline solution, and recovering crude phenol; (2) adding sodium hydroxide into a crude phenol recovered acid solution to regulate the pH value to be larger than 12; (3) mixing the waste gasoline alkaline solution obtained in the step (2) and a waste liquid hydrocarbon alkaline solution containing organic nitrogen, and removing oil through air floating; (4) carrying out high-temperature wet oxidation treatment on the oil removed waste alkaline solution; (5) carrying out gas-liquid separation on the mixed waste alkaline solution; (6) adding sodium hydroxide into the waste alkaline solution subjected to gas-liquid separation, and recovering the separated sodium carbonate; and (7) evaporating and concentrating the waste alkaline solution treated in the step (6). By using the treatment method, the crude phenol in the waste gasoline alkaline solution can be economically recovered, the COD, organic nitrogen, phenols and sulfides in the mixed waste alkaline solution can be efficiently removed, the sodium hydroxide solution generated after the waste alkaline solution is treated can be recycled, the use amount of a reagent is reduced, and the zero emission of the waste alkaline solution is realized.

Description

Technical field [0001] The invention belongs to the field of wastewater treatment, and specifically relates to a method for treating waste lye from oil product refining. The waste lye is gasoline refining waste lye and liquid hydrocarbon waste lye containing organic nitrogen. Background technique [0002] In my country’s oil refineries, many oil refining processes use alkali refining processes, that is, using NaOH solution to absorb H 2 S. Alkaline washing oil. Waste lye containing a lot of pollutants is produced in this process, including waste lye of atmospheric diesel, waste lye of catalytic gasoline, waste lye of catalytic diesel, waste lye of liquid hydrocarbon, etc. For the waste lye from oil refining, the main domestic treatment processes currently include: direct treatment, chemical treatment and biological treatment. [0003] CN02130781.4 discloses a method for processing oil refining soda slag. The oil refining soda slag containing evaporation promoter is evaporated at 10...

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): C02F9/10
Inventor 周彤邓德刚许莹秦丽姣
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com