Petroleum Sodium Sulfonate? Synthetic Sodium Sulfonate? What's The Difference?
Leave a message
Petroleum Sodium Sulfonate? Synthetic Sodium Sulfonate? What's the difference?
What is Sodium Petroleum Sulfonate?
Sodium Petroleum Sulfonate T702 is an anionic surfactant and also a good water-soluble metal rust preventive. It has strong hydrophilicity, good anti-rust performance, and excellent emulsification performance. It is an important additive in metalworking fluids and anti-rust lubricating greases.
Sodium petroleum sulfonate with a molecular weight of 500-600 has the best anti-rust performance, and sodium petroleum sulfonate with a molecular weight of 450-500 has good emulsification. In the lubricant industry, Sodium petroleum sulfonate is rarely used independently as an anti-rust additive, it is mainly used to blend emulsified metalworking fluids.
Production process of sodium petroleum sulfonate
According to the source of sulfonic acid, rust preventive additive sodium sulfonate can be divided into sodium petroleum sulfonate and synthetic sodium sulfonate (mainly sodium heavy alkylbenzene sulfonate and sodium dinonylnaphthalene sulfonate).
The sulfonic acid of sodium petroleum sulfonate T702 is obtained from the by-product (acid residue) of white oil production. In addition to sulfonic acid, this by-product usually contains mineral oil and inorganic salts.
Synthetic sulfonates are often synthesized from dinonylnaphthalene and heavy alkylbenzene (a by-product of alkylbenzene production).
T702 is obtained by sulfonating the petroleum refining fraction, extracting with ethanol alkali, deoiling, and dehydrating. In addition to sodium petroleum sulfonate, it also contains mineral oil and inorganic salts.
Why do the Chinese manufacturers not produce natural petroleum sodium sulfonate at present?
Most of the petroleum sodium sulfonate T702 currently sold in the Chinese market is synthetic sodium sulfonate, and natural domestic sodium sulfonate is already relatively scarce. Why is there so little natural sodium alkyl benzene sulfonate produced in China at present?
The main reason is that the main raw material ( petroleum sulfonic acid ) comes from the by-product (acid residue) of white oil production by the traditional desulfurization method, which has low production efficiency, low white oil yield, and environmental pollution. Therefore, the old production process has been replaced by the new ones. Generally, China does not produce natural sodium alkyl benzene sulfonate.
Synthetic sodium sulfonate has replaced petroleum sodium sulfonate in most applications, and synthetic sodium sulfonate has a sufficient source of sulfonate acid, which is the heavy alkyl benzene (a by-product of alkyl benzene production).
Can synthetic sodium sulfonate replace natural petroleum sodium sulfonate?
Yes, Synthetic sodium sulfonate has replaced petroleum sodium sulfonate.
Sodium petroleum sulfonate and synthetic sodium sulfonate are similar in nature, both have strong hydrophilicity and good surface activity. They can both be used as anionic surfactants and are widely used in metalworking fluids, textile agents, cleaning agents, rust inhibitors, coatings, emulsions, ore flotation agents, printing inks and other fields.
There are still some differences between the two products, mainly in emulsification performance. Users need to fine-adjust the formula system according to actual emulsification performance.
What is the relationship between the application of sodium sulfonate and its molecular weight? What molecular weight of sodium sulfonate should I choose?
CHORUS offers a wide range of molecular weights Synthetic Sodium Sulfonates for metalworking fluids and anti-rust lubricants.
- Synthetic Sodium Sulfonate SS440
- Synthetic Sodium Sulfonate SS450
- Synthetic Sodium Sulfonate SS460
- Synthetic Sodium Sulfonate SS470
- Synthetic Sodium Sulfonate SS480
- Synthetic Sodium Sulfonate SS500
Generally, Synthetic sodium sulfonate with a small molecular weight has a stronger emulsifying performance, while that with a large molecular weight can enhance the anti-rust performance.
Get in touch to learn more about rust-preventive additives and synthetic sodium sulfonates.
