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SLES vacuum neutralization is a critical industrial process that neutralizes sulfated lauryl alcohol ether with alkaline agents (like NaOH) under vacuum, producing high-concentration Sodium Laureth Sulfate (
) while simultaneously stripping volatile 1,4-dioxane to levels below 10 ppm. This method reduces thermal degradation, prevents pH instability, and ensures low-dioxane, high-quality SLES.
Key Aspects of Vacuum Neutralization:
- Dioxane Reduction: The process effectively removes 1,4-dioxane, a carcinogenic byproduct, by utilizing the heat of neutralization in a flash tank or stripping tower under vacuum.
- Process Stability: By using a vacuum neutralizer, the temperature of the reaction is controlled to prevent over-concentration, gelation, and pH instability, resulting in lighter-colored product.
- Key Technology Providers: Technologies, such as those discussed on the WEIXIAN SLES neutralization process page, focus on low-temperature, high-stability production.
- Reaction Steps: Sulfation of alcohol ethoxylate with is followed by neutralization, where 10 times the amount of SLES is often recycled to keep the temperature rise below 5°C.
- Types of Processes: Various techniques exist, including double-step, pump-type, and dedicated vacuum tower systems, as shown on the WEIXIAN SLES vacuum neutralization technology page.
This process is vital for producing high-quality Wikipedia page on SLES compliant with environmental and safety standards.
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Web results
Vacuum Neutralization Technology in Surfactants Production
Ballestra S.p.A.
https://www.ballestra.com › ... › Sulphonation Suphation
Ballestra S.p.A.
https://www.ballestra.com › ... › Sulphonation Suphation
Ballestra's Vacuum Neutralization Technology offers unmatched operational flexibility, making it ideal for the production of SLES and other anionic surfactants.Read more
Customized SLES neutralization process ...
WEIXIAN (Nanjing) Science Technology co., ltd
https://www.njweixian.com › sles-neutralization-process
WEIXIAN (Nanjing) Science Technology co., ltd
https://www.njweixian.com › sles-neutralization-process
Mar 8, 2023 — It can achieves neutralization、cooling、dioxane stripping and degassing together, and it overcomes the high temperature rise、poor PH stability ...Read more
SLES Surfactant: Industrial Applications and Formulation ...
Elchemy
https://elchemy.com › blogs › intermediates-solvents › sl...
Elchemy
https://elchemy.com › blogs › intermediates-solvents › sl...
Jan 3, 2026 — The sulfation reaction runs for approximately 2.5 hours, producing an intermediate compound. Neutralization with sodium hydroxide converts this ...Read more
SLES vaccumm neutralization
WEIXIAN (Nanjing) Science Technology co., ltd
https://www.njweixian.com › sles-vaccumm-neutralization
WEIXIAN (Nanjing) Science Technology co., ltd
https://www.njweixian.com › sles-vaccumm-neutralization
When producing SLES, the sulfate needs to be neutralized with pure water, caustic soda, H2O2, and buffer in the neutralization reactor, all materials react ...Read more
Is the SLES we use safe?
DermaHarmony
https://www.dermaharmony.com › pages › sles
DermaHarmony
https://www.dermaharmony.com › pages › sles
Dioxane rich vapors that come from the flash tank are condensed and recovered in a vacuum unit (called vacuum stripping). Dioxane recovery is part of the ...Read more
Neutralization of organic sulfuric or sulfonic detergent acid ...
Google Patents
https://patents.google.com › patent
Google Patents
https://patents.google.com › patent
A process for neutralizing an organic sulfuric or sulfonic detergent acid, eg, lauryl sulfuric acid or mixture of such acids, in liquid state, with a liquid ...Read more
People also ask
What type of surfactant is SLES?
Sodium Lauryl Ether Sulfate, known throughout manufacturing circles as SLES surfactant, serves as the backbone of modern cleaning and personal care formulations. This anionic surfactant powers everything from industrial degreasers to luxury shampoos, processing roughly 7 million tonnes annually across global markets.Jan 3, 2026
SLES Surfactant: Industrial Applications and Formulation ...
Elchemy
https://elchemy.com › blogs › intermediates-solvents › sl...
Elchemy
https://elchemy.com › blogs › intermediates-solvents › sl...
What is neutralization in waste treatment used for?
Neutralization is carried out in order to prevent corrosion of materials of sewage treatment facilities, disruption of biochemical processes in biological oxidants and in water bodies, as well as for precipitation of heavy metal salts from wastewater [1,2,3].
Neutralization of Industrial Water by Electrodialysis - PMC - NIH
PMC - NIH
https://pmc.ncbi.nlm.nih.gov › articles › PMC7911343
PMC - NIH
https://pmc.ncbi.nlm.nih.gov › articles › PMC7911343
Can dissolved salts of hazardous metal wastes be treated by neutralization?
Dissolved salts of hazardous metal wastes can be treated by neutralisation. Explanation: Acidic or alkaline solutions which includes dissolved salts of metals which forms insoluble species can be treated by neutralisation by varying pH.
Neutralization - Hazardous Waste Management Questions and Answers
Sanfoundry
https://www.sanfoundry.com › hazardous-waste-manage...
Sanfoundry
https://www.sanfoundry.com › hazardous-waste-manage...
Web results
Sodium laureth sulfate
Wikipedia
https://en.wikipedia.org › wiki › Sodium_laureth_sulfate
Wikipedia
https://en.wikipedia.org › wiki › Sodium_laureth_sulfate
It is derived from palm kernel oil or coconut oil. In herbicides, it is used as a surfactant to improve absorption of the herbicidal chemicals and reduces time ...Read more
Sulphonation Process- Unit 79 Neutralization & Dioxane ...
YouTube · WEIXIAN NANJING SCIENCE TECHNOLOGY CO.,LTD
760+ views · 2 years ago
YouTube · WEIXIAN NANJING SCIENCE TECHNOLOGY CO.,LTD
760+ views · 2 years ago
Features: Compared with Italy's vacuum neutralization, WEIXIAN stripping tower is static equipment, without motor and maintenance ...
Slovdson Sulphonation/Sulphation Plant SLES/SLS ...
Made-in-China.com
https://slovdson-blower.en.made-in-china.com › product
Made-in-China.com
https://slovdson-blower.en.made-in-china.com › product
Slovdson Sulphonation/Sulphation Plant SLES/SLS Neutralization and Dioxane Stripping Unit-Water Ring Vacuum Pump. US$999.00-6,999.00. 1Set (MOQ) ...
LABSA and SLES: Key Ingredients in Industrial Cleaning
Decachem
https://www.decachem.com › labsa-sles-key-ingredients...
Decachem
https://www.decachem.com › labsa-sles-key-ingredients...
Aug 4, 2025 — Both LABSA and SLES are surfactants - compounds that reduce the surface tension between liquids or between a liquid and a solid.Read more