Alkylaryl sulphonates

Alkylaryl sulphonate, sodium salt ECCOTERGE Eastern Color... 

A certified Conostan vanadium alkylaryl sulphonate standard containing... 

In recent years considerable attention has been given to the biodegradability of polyethoxylates and the role of their structure in this process. In consequence, there has been a move away from multi-branched alkyl side-chain in the starting alkylphenolic raw material towards more linear chains, a circumstance already adopted in the use of kerylbenzenes for the manufacture of alkylaryl sulphonates. Another practice adopted has been that of sulphation of the terminal hydroxyl group in the polyalkoxylate. Recent studies on a comparison of ethoxylates derived from the natural alkenylphenol, cardanol and from nonylphenol have indicated a considerable difference in biodegradability (ref. 24). 

Exposure to temperatures > SO C for prolonged periods adversely affects the microbicidal properties in a concentration of 1 g/Utre stable at pH values up to 10 0 above this precipitation may occur The cationic compound gives water-insoluble precipitates with anionic surfactants, e.g. soaps, alkyl sulphates, alkylaryl sulphonates and anionic caramels the a.i. is precipitated also by strong alkalis and complex phosphates... 

The multi-stage processes include those in the synthesis of adipinic acid, which is required for nylon manufacture, the production of synthetic detergents—alkylaryl sulphonate, and the synthesis of the dimethyl ester of tere-phthalic acid (terephthalate), that is required for the processing of terylene fibre. The last example will include a description of the system (2.3) according to components by means of system (2.7). 

B. The nuterial balance for the synfliesis of the detergent alkylaryl sulphonate (dodecylbenzene sulphonate)... 

Fio. 17. Diagram of complex process for the production of alkylaryl sulphonate Xi, Xi and Xs are by-products. 

Figure 17 illustrates the process in the formula of alkylaryl sulphonate no significance should be attached to the point at which the HSO3 group is joined. 

According to the diagram of the movement of the flows of the process of the synthesis of alkylaryl sulphonate (Fig. 18), we have ... 

As a check, we will determine the amount of alkylaryl sulphonate per day. (1) According to the balance from the sum of all the reagents ... 

Dodecylbenzene-sulphonation process for producing alkylaryl sulphonate (reactor 8). 

The dodecylbenzene that has formed is passed to the sulphonation section, where alkylaryl sulphonate is formed. The unreacted sulphuric acid is recycled. 

Senden, W. A. A., R. Riemersma, Alkylaryl sulphonates by HPLC, Tenside, 1990,27,46-51. Yokoyama, Y., H. Sato, Reversed-phase HPLC determination of LAS in river water at ppb levels by precolumn concentration. 7. Chromatogr., 1991,555,155-162. 

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