Sulfur acetate

Odon acetate Odon, Saran polyethylene Teflon steel wood amber sealing wax hard mbber nickel, copper, brass, silver, old platinum sulfur acetate rayon polyester... 

In methanol, isoquinoline and the ester gave the benzo[fif]indolizine [(121), cf. Section II,D,3] while in ether the labile adduct, tetra-methyl llbH-benzo[a]quinolizine-l,2,3,4-tetracarboxylate (122) was obtained. The labile adduct is much less easily isoraerized than the 9-methyl-9aH-quinolizines derived from pyridines (Section III,F,1) but with boiling xylene or, better, with sulfuric-acetic acids the cor-... 

Tri nitro-1 -N aphthol (2,4,7 -Trinitro-1 -oxy-naphthalene). Yellow prisms from AcOH or benz, mp 145° (decompn). Sol in AcOH glac AcOH. Prepn from 2,4-dinitro-l-naphthol by mixed acid (nitric-sulfuric-acetic) nitration. The compound is extracted as the Na salt from... 

A significant portion of the nonpetroleum product outputs of refineries is transported off-site and sold as by-products. These outputs include sulfur, acetic acid, phosphoric acid, and recovered metals. Metals from catalysts and from the crude oil that have deposited on the catalyst during the production often are recovered by third-party recovery facilities. 

Formation of the sulfur acetals have also been reported.146-148 326... 

Isatins condense with benzene,541 alkylbenzenes,541 and phenols37,55,542 under acidic conditions to give 192. Hydroquinone and X-methylisatin with sulfuric-acetic acid gave 193.55 Pyrroles543 and indoles498,543 also condense with isatin under acidic543 or basic498 conditions. 

Silicotungstic acid is prepared by the hydrolysis of a mixture of sodium tungstate and sodium silicate. This reaction goes to completion only in the presence of acid. Sulfuric, acetic, and nitric acids all have been used,1,213 but none of them is completely satisfactory. Sulfuric acid, since it cannot be volatilized from the silicotungstic acid, is apt to cause decomposition. It also tends to precipitate... 

Industries may emit various pollutants relating to their manufacturing processes— acids (sulfuric, acetic, nitric, and phosphoric), solvents and resins, gases (chlorine and ammonia), and metals (copper, lead, and zinc). 

Sulfur acetals come into their own as d reagents (acyl anion equivalents). 

Oxa-thiolanes and -thianes combine the properties of oxygen and sulfur acetals. Thus they can be cleaved with mercury salts and are also more labile towards acids than the sulfur analogs. In addition, oxazolidines, imidazolidines and thiazolidines can be used for the protection of aldehydes and ketones however, they have not found a broader use in protecting group chemistry. 

Benzidine is metabolized to highly toxic, reactive metabolites, such as N-hydroxyarylamides and N-hydroxyarylamines, which act as procarcinogens and are more mutagenic than parent compounds. The metabolites act as DNA adducts and bind to cell receptors. The metabolites on conjugation with sulfuric, acetic, and glucuronic acids form ultimate carcinogens. Acetylated benzidine metabolites such as N-acetoxyarylamines are known to cause bladder cancer in dye industry workers. 

Hydrolysis. The enaminonitrile (1) is converted into the ketoamide (2) by hot PPA in high yield (1 g.---- 1.09 g., nearly pure)." Sulfuric acid and sulfuric-acetic... 

Metal and acid. Iron and acid (B champ method) is the major example in this category, but other metals (tin, zinc) have also been employed. Generally, hydrochloric acid is preferred, but sulfuric, acetic, and formic acids have also been used. 

Sulfur acetals as good nucleophiles in the terminology of chapter 28, acyl anion equivalents or d reagents . 

Cyclic Acetals Formation of an acetal using a diol as the alcohol gives a cyclic acetal Cyclic acetals often have more favorable equilibrium constants, since there is a smaller entropy loss when two molecules (a ketone and a diol) condense than when three molecules (a ketone and two molecules of an alcohol) condense. Ethylene glycol is often used to make cyclic acetals its acetals are called ethylene acetals (or ethylene ketals). Dithiane (Section 18-8) and its alkylated derivatives are examples of cyclic thioacetals (sulfur acetals). 

The third group of xenobiotics modifications is represented by conjugations , which include acylation of alcohols, phenols, amines, amides, hydrazides, etc., with sulfuric, acetic, glucuronic, glutamic and other acids, alkylation, and other synthetic... 

Klarstrom, 1993). Besides HCl solutions, B-2 and B-3 alloys are also used in the handling of other corrosive reducing environments such as sulfuric, acetic, formic, hydrofluoric, and phosphoric acids. The major shortcoming of B-type alloys is their poor resistance to oxidizing environments. 

N7M is the cast equivalent of Hastelloy B2. This nickel-molybdenum alloy has excellent corrosion resistance in all concentrations and temperatures of hydrochloric acid. If ferric or cupric ions are present, however, severe attack will occur. It is also good for sulfuric, acetic, and phosphoric acids. ... 

HASTELLOY alloy B-2—An improved wrought version of HASTELLOY alloy B. Alloy B-2 has the same excellent corrosion resistance as alloy B, but with improved resistance to knife-line and heat-affected zone attack This alloy resists the formation of grain-boundary carbide precipitates in the weld heat-affected zone, thus making it suitable for most chemical process applications in the as-welded condition. Alloy B-2 also has excellent resistance to pitting and stress-corrosion cracking it is particularly well suited for equipment handling hydrogen chloride gas. and hydrochloric, sulfuric, acetic, and phosphoric acids. 

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