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Alkylbenzene sulphonate paste

Linear alkylbenzene sulphonate paste (LABS) quality, storage, handling and safety... [Pg.193]

For final products that require alkaline silicate, silicated paste can be stored. For this type of paste with a composition of 34% AD, 2% salts, 14% allmline silicate and 50% water, mild steel tanks can be used as alkaline silicate is a recognised mild steel corrosion inhibitor. Its inclusion in alkylbenzene sulphonate paste, besides aiding homogeneity, enables the paste to be handled satisfactorily in mild steel equipment without becoming contaminated with iron. Agitation in silicated paste is not required circulation with an external pump, at a rate sufficient to turn over the contents once per hour, will be adequate. [Pg.194]

Mono-type pumps are recommended for alkylbenzene sulphonate paste duty. Pipe diameter selection has been discussed in section 5.6.1.. [Pg.194]

Much of the colour produced during sulphonation is contained in the spent acid. The upper layer in the separator, which contains around 90% alkylbenzene sulphonic acid (the remainder being primarily dissolved sulphuric acid) is also removed from the separator and neutralised with sodium hydroxide solution or with sodium carbonate solution to yield the active paste. When sodium hydroxide is used a considerable amount of heat must be removed. This is done in the third loop reactor of this process, the neutralisation heat exchanger (also known as the neutraliser). If sodium carbonate solution is used, the neutralisation is much less exothermic and no heat exchanger is needed at this stage. [Pg.10]

The quality of alkylbenzene sulphonate from 20% oleum plants is normally very good. The free oil figures fall in a range between 0.6 and 1.7% on 100% AD. Due to the dissolved sulphuric acid in the sulphonic acid phase, the sodium sulphate levels on 1(X)% AD vary between 6 and 15% depending on the type of alkylate and the efficiency of the separation process of sulphonic acid/spent acid. Paste colour is normally very good, wiA values well below 1(X) Klett (5% AD solution, 4 cm cell, F42 filter). [Pg.243]

Alkylbenzene sulphonate (LABS) paste viscosity at various AD concentrations and... [Pg.298]

No distinction is made between soft alkylbenzenes made from the HF or AICI3 catalysed processes. However, differences in the physical properties of the neutralised pastes of sulphonic acids, particularly between those derived from hard and soft alkylates (free oil, colour, viscosity), are apparent. Hence each new supply will require testing to determine whether the required properties in the chosen application can be achieved. [Pg.32]


See other pages where Alkylbenzene sulphonate paste is mentioned: [Pg.190]    [Pg.194]    [Pg.190]    [Pg.194]    [Pg.94]    [Pg.242]   
See also in sourсe #XX -- [ Pg.194 ]




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