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SLES 70% (Sodium Lauryl Ether Sulfate) neutralization involves reacting sulfated paste with caustic soda (
) and buffer (e.g.,
) in a reactor, followed by vacuum stripping to remove 1,4-dioxane. Modern plants use vacuum stripping towers or specialized Dioxane Removal Systems (DRS) to reduce dioxane below 10 ppm, sometimes achieving ultra-low levels (below 1-2 ppm) by leveraging dioxane's azeotrope with water.
This video explains how to avoid 1,4-Dioxane in your formulations:
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Web results
SLES neutralization and Dioxane Stripping
WEIXIAN (Nanjing) Science Technology co., ltd
https://www.njweixian.com › sles-neutralization-and-dio...
WEIXIAN (Nanjing) Science Technology co., ltd
https://www.njweixian.com › sles-neutralization-and-dio...
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
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
Dioxane removal is performed with no need of feeding the system with any extra steam, since dioxane stripping takes place by means of the heat made available by ...Read more
Great news to share! 🎉South Korean Client Achieving ...
WEIXIAN (Nanjing) Science Technology co., ltd
https://www.njweixian.com › great-news-to-share-south-...
WEIXIAN (Nanjing) Science Technology co., ltd
https://www.njweixian.com › great-news-to-share-south-...
3 days ago — Our Multistage Dioxane Stripping technology has been successfully applied at a sulphation plant in South Korea, achieving 88.7% dioxane ...
DRS Dioxane Removal System
Chemithon Enterprises
https://www.chemithon.com › Proc_drs
Chemithon Enterprises
https://www.chemithon.com › Proc_drs
The DRS is a compact, low energy consumption drying apparatus. It removes volatile components from a detergent slurry under carefully controlled conditions.Read more
Managing 1,4-Dioxane
UL Prospector
https://www.ulprospector.com › media › 2021/09
UL Prospector
https://www.ulprospector.com › media › 2021/09
PDF
Ether Sulfates (e.g. SLES) are made in a 2-step process: Problem 2: Presence of water makes 1,4-. Dioxane removal much more difficult.Read more
37 pages
Precise measurement of 1,4‐dioxane concentration in ...
AOCS Publications
https://aocs.onlinelibrary.wiley.com › doi › jsde
AOCS Publications
https://aocs.onlinelibrary.wiley.com › doi › jsde
Nov 21, 2022 — SPE consists of the selective removal of 1,4-dioxane from water through adsorption to a solid matrix. An example of SPE is EPA Method 522, a ...Read more
DIOXANE IN SLES (surfactant) being manufactured?
ResearchGate
https://www.researchgate.net › post › HOW_CAN_ONE...
ResearchGate
https://www.researchgate.net › post › HOW_CAN_ONE...
Jul 6, 2023 — Carboxyl methyl cellulose (CMC) was used to accomplish the effective solubilization of total petroleum hydrocarbons (TPHs) from contaminated ...Read more
SLES 70 Dioxane removal technology
WEIXIAN (Nanjing) Science Technology co., ltd
https://www.njweixian.com › sles-70-dioxane-removal-te...
WEIXIAN (Nanjing) Science Technology co., ltd
https://www.njweixian.com › sles-70-dioxane-removal-te...
Stripping tower 79T1 is static equipment, without motor or rotating parts. Compared to outdated technology, our stripping tower doesn't need maintenance.Read more
Method and unit for reducing dioxane produced as a result ...
Google Patents
https://patents.google.com › patent
Google Patents
https://patents.google.com › patent
The present invention relates to the field of sulfonation processes and in particular it relates to a method and relative unit for reducing dioxane, the by- ...Read more
Cleaning out a carcinogenic contaminant - C&EN
C&EN
https://cen.acs.org › business › consumer-products › Clea...
C&EN
https://cen.acs.org › business › consumer-products › Clea...
Jan 22, 2025 — Both exploit 1,4-dioxane's affinity for water as a lever to remove it. Vacuum stripping is another common choice for surfactant makers.Read more