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Sorbitan mono-oleate

Some of the uses of these and similar compounds may now be enumerated. It has been found that hydroxypolyoxyalkylene derivatives of sorbitan mono-oleate (commercial name, Tween 80) favors the growth of tubercle bacilli and permits the multiplication of very small inocula.81 Moreover, Tween 80 also nullifies the antitubercular effect of such substances as 5-amino-2-butoxypyridine82 and of ethyl chaulmoograte.88... [Pg.236]

The extraction of uranyl nitrate from 1 M aqueous solution into 30% tributylphosphate in oil is accompanied by an initial interfacial turbulence (41), with more transfer than calculated, even though re-solvation of each uranyl ion at the interface must be a relatively complex process. If the turbulence is suppressed with sorbitan mono-oleate, transfer proceeds at a rate in excellent agreement with theory. [Pg.25]

Figure 6.21 The influence of emulsifier concentration on the relative viscosity of sorbitan mono-oleate stabilised W/O emulsions in paraffin. The emulsions had dispersed phase volume fractions in the range 0.37 to 0.68 and mean droplet diameters, am, as plotted along the x-axis. From data in Sherman [215]. Figure 6.21 The influence of emulsifier concentration on the relative viscosity of sorbitan mono-oleate stabilised W/O emulsions in paraffin. The emulsions had dispersed phase volume fractions in the range 0.37 to 0.68 and mean droplet diameters, am, as plotted along the x-axis. From data in Sherman [215].
Ethoxylated fatty acid Sorbitan mono-oleate (Span 80) w/o ... [Pg.1552]

Tween 80 11 Polysorbate 80, polyethylene glycol 20 sorbitan mono-oleate N 15 20mM po, par... [Pg.795]

Sorbitan monolaurate - Span 20 Sorbitan monopalmitate - Span 40 Sorbitan monostearate - Span 60 Sorbitan mono-oleate - Span 80 Sorbitan tristearate - Span 65 Sorbitan trioleate - Span 85. [Pg.20]

Polyoxyethylene (20) sorbitan monolaurate - Tween 20 Polyoxyethylene (20) sorbitan monopalmitate - Tween 40 Polyoxyethylene (20) sorbitan monostearate - Tween 60 Polyoxyethylene (20) sorbitan mono-oleate - Tween 80 Polyoxyethylene (20) sorbitan tristearate - Tween 65 Polyoxyethylene (20) sorbitan tri-oleate - Tween 85. [Pg.21]

Tweens Poly(oxyethylene) sorbitan mono oleate 16... [Pg.353]

Polysorbate SO. Sorbltan mono-9-octadecenoate poly(oxy-l,2-ethanediyl) derirs polyoxyethylene (20) sorbi -tan mono -oleate sorethytan (20) mono -oleate polyethylene oxids sorbitan mono-oleate Sorbitan mono-oleate polyoxyethylene Sorlate Tween 80 Monitan Olothorb. An oleate ester of sorbitol and its anhydrides copolymerized with approx 20 moles of ethylene oxide for each mole of sorbitol and sorbitol anhydrides. See also Span. [Pg.1207]

Peptone (Difco) and Tween 80 (Atlas Chemical Industries, polyoxy ethylene sorbitan mono-oleate) were sometimes added as noted. Shake cultures were inoculated with a spore suspension, and grown at 25 °-29°C. on reciprocating or rotary shakers. [Pg.401]

Commercial stabilizers include among others, ionic sodium nonylphenol polyoxyethylene-25 sulfate (SNP-25 S) (8), as well as nonionic Tween 20 [sorbitan mono-9-octadecenoate poly(oxy-l, 1-ethanediyl)] and Tween 80 (8), tetraoxylene nonylphenolether (C9PhE4, NP-4), oc-taoxyethylene nonylphenolether (CqPhg, NP-8), sorbitan monolaiueate (Span 20), and sorbitan mono-oleate (Span 80) (4). [Pg.443]

In contrast to these oil-in-water emulsions, it is possible that the emulsion polymerization can also be carried out with inverse emulsions. Inverse (water-in-oil) emulsion polymerization in which an aqueous solution of a water miscible hydrophilic monomer such as acrylamide, acrylic add, or methacrylic acid is dispersed in a continuous hydrophobic oil phase with the aid of a water-in-oil emulsifier such as sorbitan mono-oleate or -stearate. The emulsifier is ordinarily above the CMC. Polymerization can be initiated with either oil-soluble or water-soluble initiators. If an oil-soluble initiator is used, the system is an almost exact mirror-image of a conventional emulsion polymerization system. The final latex is a colloidal dispersion of submicroscopic, water-swollen particles in oil. This type of emulsion pol3unerization enables the preparation of high molecular weights water-soluble polymers at rapid reaction rates. It is also possible that the water-swollen polymer particles produced by this emulsion pol)nnerization transfer to aqueous phase rapidly by inversion of the latex. [Pg.52]

Esters of fatty acids (w/o) Glycerol monostearate (monosteaiin) Glycerol mono oleate (mraiolem) Sorbitan mono oleate (Span 80) Triglycerol diisostearate... [Pg.482]

The fatty acid sorbitan esters, are often used cyclic polyol esters (w/o). The best known example is sorbitan mono-oleate (Span 80) (Fig. 23.9). [Pg.483]

As described earlier in the section on bead or suspension polymers (Section 3.3.1.2), a solution of monomer(s) is prepared in water and then mixed into a low to medium viscosity non-volatile oil phase. In this process, which is often referred to as an inverse emulsion polymerisation technique, surfactants which promote the formation of water-in-oil emulsions are commonly used. These would usually be materials with an HLB (hydrophihc-lipophilic balance) value in the range 4—7, an example of which is sorbitan mono-oleate. In order to achieve the desired droplet particle size of a maximum around 1 pim prior to polymerisation, high shear homogenisers are used to assist the formation of such very small... [Pg.40]

A significant proportion of water soluble polyelectrolytes are produced as liquid grade products that are predominantly inverse, that is water-in-oil emulsions. In this process the aqueous monomer is dispersed in a non-aqueous continuous phase through a combination of high-shear mechanical mixing and the use of low hydrophile-Hpophile balance (HLB) surfactants such as sorbitan mono oleate or similar. The resultant dispersion contains droplets having an average particle diameter of only about 1 pm. [Pg.143]

A typical NMR spectrum of an ME mixture consisting of ethyloleate, a surfactant-mix of polyoxyethylene 20 sorbitan mono-oleate and sorbitan mono-laurate (6 4) and water, obtained with an increasing gradient strength over 17 increments is shown in Eigure 9.4. [Pg.264]

ME systems containing ethyloleate, sorbitan monolaurate, polyoxyethylene 20 sorbitan mono-oleate, butanol, and water in various compositions were investigated nsing this technique [85]. The cryo-SEM miaographs in Figure 9.6 are for (a) water droplets in a continuous oil matrix, (b) a bicontinuous ME system, and (c) a solution type ME [85]. [Pg.270]

Ttoeen 80 Solution. Dissolve 20 g. of Tween 80 (polyoxyethylene sorbitan mono-oleate) in water to make 200 ml. Store in a refrigerator. [Pg.107]

See other pages where Sorbitan mono-oleate is mentioned: [Pg.238]    [Pg.556]    [Pg.268]    [Pg.781]    [Pg.341]    [Pg.346]    [Pg.892]    [Pg.361]    [Pg.795]    [Pg.398]    [Pg.353]    [Pg.226]    [Pg.639]    [Pg.795]    [Pg.338]    [Pg.256]    [Pg.711]    [Pg.1039]    [Pg.671]    [Pg.502]    [Pg.484]    [Pg.415]    [Pg.588]    [Pg.377]    [Pg.12]    [Pg.13]    [Pg.255]    [Pg.173]   


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