Methyl ester sulfonate

Fatty JicidFster Sulfonates. Fatty acid ester sulfonates (FAES) are generally produced from methyl esters, ie, methyl ester sulfonate (MES) and prepared via sulfonation, followed by bleaching and neutralization, in a relatively difficult and complex process ... 

Because there are never chain length pure surfactants in technical applications, the CMC of mixtures of different ester sulfonates is important. Fabry and Giesen showed that the CMC value of C16 a-methyl ester sulfonate is lower than the value of a C16/C18 a-ester sulfonate. There is the same tendency for C16 a-disalt and C16/C18 a-disalt. For the C16/C18 mixtures the ester group has no influence on the CMC. The methyl ester has nearly the same values as the ethyl and the /-propyl ester [59]. 

For a further separation of the sulfonated surfactants the latter are heated for 4 h with 2 N HC1. The methyl ester sulfonates are split into methanol and a-sulfo fatty acids, which form disodium salts after neutralization with NaOH. The product mixture from acid hydrolysis can be separated by extraction with petroleum ether. For example, the fatty alcohols formed from fatty alcohol sulfo-... 

D. a-Sulfo fatty acid methyl esters (methyl ester sulfonates) 634... 

D. a-Sulfo Fatty Acid Methyl Esters (Methyl Ester Sulfonates)... 

TABLE 6 Reaction Scheme of FA Methyl Ester Sulfonation... 

FAME may in the future become a possible organic feedstock to the sulfonated to fatty acid methyl ester sulfonate (FAMES). This feedstock is naturally renewable as it is produced from oils/fats or fatty acids. There are several possible process routes for the manufacture of FAME. 

In addition to their transformation into linear alcohols by hydrogenation, methyl esters obtained in the transesterification of fats and oils can also be used as raw materials for sulfonation, yielding a family of derivatives known as methyl ester sulfonates (MES). These products are only significant in some southeast Asian markets, Japan and to a much lesser extent in other markets such as the US. 

In the case of methyl ester sulfonation to produce MES, the colour of the final sulfonated product is usually very dark, and the process... 

Methyl Ester Sulfonates. Methyl ester sulfonates (MES) are an old product whose time may be coming. MES is produced by reacting... 

Under acid or alkaline conditions, MES will hydrolyze to di-salt Fig. 36.32. Synthesis of methyl ester sulfonates. 

The tt-sulfo fatty acid esters represent another class of anionic surfactants. Methyl ester sulfonates (MES) are surfactants that are derived from a variety of methyl ester feedstocks such as coconut, palm kernel, palm stearin, beef tallow, and soy. Palmitic and stearic acid derivatives lead to good detergency because of the long hydrophobic residues [3, 4]. The sensitivity of MES to water hardness is similar to AOS and small compared to LAS and SAS. MES have exceptional dispersion power with respect to lime soap. They have only been used in a few Japanese detergents [3, 4]. 

Coco-Based Surfactants. The most important coconut oil-based surfactants are fatty alcohol sulfate, fatty alcohol ether sulfate, and fatty alcohol polyglycol ether. Two relatively new coco-based surfactants are fatty acid methyl ester sulfonate and alkyl polyglycoside, which is produced from fatty alcohol and starch or sugar, both renewable materials. 

Fatty acid methyl esters sulfonate may be considered a material with a great potential. Its superior sequestering effect on water hardness gives it an advantage over fatty alcohol sulfate. The sulfonation of fatty acid methyl ester is different from that of fatty alcohol. The reaction mechanism involves two steps (31). In the first reaction, the SO3 gas reacts quickly to form sulfoanhydride. In the second step (which takes 40-90 min), the sulfoanhydride becomes the sulfonating agent, reacting with the still-unreacted ester. 

FIG. 8.12 Detergency as a function of water hardness in methyl ester sulfonate/LAS formulations. Conditions 25°C, surfactant 270 ppm, NaiCCh 135 ppm, silicate 135 ppm. (Reproduced from Satsuki, T., in Proceedings of the 3rd World Conference on Detergents Global Perspectives, Cahn, A., Ed., AOCS Press, Champaign, IL, 1994, p. 135. With permission.)... 

The classic use of methyl esters of vegetable oils has been as intermediates in the production of fatty alcohols from vegetable oils (Peters, 1996 Ahmad et al., 2007) or esterquats and methyl ester sulfonates (Ahmad et al., 2007). Fatty alcohols and the other products are used in surfactants and cleaning supplies. Intermediates were produced from polyisobutylene (PIB) maleic anhydride and rapeseed oil methyl esters which were used to acylate polyethylene polyamines (Hancsok et al., 2006). These additives showed corrosion-inhibiting and lubricity-improving effects. 

Methyl ester sulfonate Sodium sulfo methyl laurate... 

Methyl Ester Sulfonate Chemical Reactions and By-Products.206... 

General Methyl Ester Sulfonates Process Conditions.207... 

Methyl Ester Sulfonates Turbo Tube Dryer System.212... 

A great deal of interest is currently focused on methyl ester sulfonates (MES) from palm and coconut derivatives with the increase in crude oil prices and the resultant increase in the prices of petrochemicals. MES offers an environment friendly and viable alternative to the old workhorse surfactant linear alkylbenzene sulfonic acid/sulfonate (LAS/LABS), which is derived from linear alkylbenzene (LAB). 

Methyl Ester Sulfonates Sulfonation Raw Material Characteristics... 

---