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Zinc propionate

Reactions with organic acids such as acetic or propionic acid yields zinc acetate, (CH3COO)2Zn, or zinc propionate, (CH3CH2COO)2Zn, upon concentration. [Pg.991]

Zinc is used for a variety of indications. Zinc acetate (8.102) or, rarely, zinc sulfate (8.103) have been used orally to treat Wilson s disease, a recessively inherited disorder of copper metabolism, characterized by brain and liver dysfunction arising from excessive deposits of copper. Zinc pyrithione (8.104) is used in shampoos to treat seborrhea. Zinc propionate (8.105) and zinc caprylate (8.106) have been used as topical antifungal agents. [Pg.535]

I Liquid carbon dioxide j under pressure. Zinc propionate. Schmitt, J, praU, Chem, 1847, [2], 42, 568. [Pg.20]

Anhydrous sodium propionate calcium propionate potassium propionate propionic acid zinc propionate. [Pg.700]

SlK Propionate. Zinc propionate occurs as an anhydrous form and as a monohydrate. It is very soluble in water but only sparingly soluble in alcohol. The salt is unstable to mture, forming zinc hydroxide and propionic acid. Zinc prapionaie is used as a fungicide, particularly on adhesive ape. [Pg.233]

Current proprietary brands of zinc oxide-eugenol may contain a variety of alternative accelerators. Acetic acid (0.1-2%) can be included in the eugenol, and some sort of zinc salt, such as zinc propionate [23], zinc succinate [23] or zinc acetate [24] blended with the zinc oxide. These combinations result in cements that set more rapidly than zinc oxide with eugenol alone, and at least part of the effectiveness of these accelerators arises from their highly hydrophilic nature, which causes the newly mixed cement pastes to absorb water from the surroundings more readily. Water has been shown to be an essential component of the reaction mixture [25,26], and high ambient humidity therefore improves the speed of the setting reaction [25]. [Pg.204]

Zinc/propionic acid 3-Benzazepine from isoquinoline ring... [Pg.442]

The Reformatsky Reaction consists of the interaction of an ester of an a-halogeno-acid with an aldehyde, a ketone or another ester in the presence of zinc. For example, if a mixture of ethyl bromoacetate and benzaldehyde is heated with zinc, the latter undoubtedly first combines with the ethyl bromoacetate to form a Grignard-like reagent (reaction A), which then adds on to the benzaldehyde Just as a Grignard reagent would do (reaction B). The complex so formed, on acidification gives ethyl p-phenyl-p-hydroxy-propionate (reaction C). Note that reaction A could not satisfactorily be carried out using... [Pg.286]

Activators. Activators are chemicals that increase the rate of vulcanization by reacting first with the accelerators to form mbber soluble complexes. These complexes then react with the sulfur to achieve vulcanization. The most common activators are combinations of zinc oxide and stearic acid. Other metal oxides have been used for specific purposes, ie, lead, cadmium, etc, and other fatty acids used include lauric, oleic, and propionic acids. Soluble zinc salts of fatty acid such as zinc 2-ethyIhexanoate are also used, and these mbber-soluble activators are effective in natural mbber to produce low set, low creep compounds used in load-bearing appHcations. Weak amines and amino alcohols have also been used as activators in combination with the metal oxides. [Pg.237]

An isoindol1 none moiety forms part of the aromatic moiety of yet another antiinflammatory propionic acid derivative. Carboxylation of the anion from -nitro-ethylbenzene (45) leads directly to the propionic acid (46). Reduction of the nitro group followed by condensation of the resulting aniline (47) with phthalic anhydride affords the corresponding phthalimide (48). Treatment of that intermediate with zinc in acetic acid interestingly results in reduction of only one of the carbonyl groups to afford the isoindolone. There is thus obtained indoprofen (49). ... [Pg.171]

Brauer, Stansbury Flowers (1986) modified these cements in several ways. The addition of various adds - acetic, propionic, benzoic etc. -accelerated the set. The use of zinc oxide powders coated with propionic add improved mixing, accelerated set, reduced brittleness and increased compressive strength from 63 to a maximum of 72 MPa. The addition of plasticizing agents such as zinc undecenylate yielded flexible materials. Incorporation of metal powders had a deleterious effect and greatly increased the brittleness of these cements. The addition of fluorides was not very successful, for fluoride release was not sustained. [Pg.344]

A facile exothermic reaction, catalysed by traces of zinc chloride and iron(III) chloride (4 and 40 ppm, respectively) to produce isopropyl propionate and 2-chloropropane (b.p., 35°C) led to pressure build up and bursting of a closed galvanised drum after 24 h. Similar reactions are thermodynamically possible with other acid chlorides and ethers (particularly if secondary or tertiary alkyl ethers), so such mixtures should only be prepared immediately prior to use. [Pg.422]

A combined addition of a chain-breaking inhibitor and a hydroperoxide-breaking substance is widely used to induce a more efficient inhibition of oxidative processes in polyalkenes, rubbers, lubricants, and other materials [3 8]. Kennerly and Patterson [12] were the first to study the combined action of a mixture, phenol (aromatic amine) + zinc dithiophosphate, on the oxidation of mineral oil. Various phenols and aromatic amines can well serve as peroxyl radical scavengers (see Chapter 15), while arylphosphites, thiopropionic ethers, dialkylthio-propionates, zinc and nickel thiophosphates, and other compounds are used to break down hydroperoxide (see Chapter 17). Efficient inhibitory blends are usually prepared empirically, by choosing such blend compositions that induce maximal inhibitory periods [13],... [Pg.620]

Among the characterized metal homoenolates, only zinc homoenolate of alkyl propionate undergoes substitution reactions with electrophiles under suitable conditions. Two types of metal catalysts, copper(I) and metals of the nickel triad (e.g. Pd), have successfully been used to effect allylation, arylation, and vinylation reactions. [Pg.20]

Table 10. Arylated and vinylated propionates by palladium-catalyzed reaction of zinc homoenolate (Ref. [29,40])... Table 10. Arylated and vinylated propionates by palladium-catalyzed reaction of zinc homoenolate (Ref. [29,40])...

See other pages where Zinc propionate is mentioned: [Pg.322]    [Pg.534]    [Pg.700]    [Pg.887]    [Pg.938]    [Pg.1348]    [Pg.1598]    [Pg.1600]    [Pg.293]    [Pg.283]    [Pg.528]    [Pg.322]    [Pg.534]    [Pg.700]    [Pg.887]    [Pg.938]    [Pg.1348]    [Pg.1598]    [Pg.1600]    [Pg.293]    [Pg.283]    [Pg.528]    [Pg.422]    [Pg.635]    [Pg.333]    [Pg.1177]    [Pg.1178]    [Pg.154]    [Pg.147]    [Pg.218]    [Pg.333]    [Pg.333]    [Pg.19]    [Pg.160]    [Pg.47]    [Pg.36]    [Pg.249]    [Pg.180]   
See also in sourсe #XX -- [ Pg.535 ]

See also in sourсe #XX -- [ Pg.700 ]

See also in sourсe #XX -- [ Pg.293 ]




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Propionic acid zinc salt

Propionic acid, a-bromoethyl ester reaction with zinc

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