Naphtha mercury

Interaction of chlorine with methane is explosive at ambient temperature over yellow mercury oxide [1], and mixtures containing above 20 vol% of chlorine are explosive [2], Mixtures of acetylene and chlorine may explode on initiation by sunlight, other UV source, or high temperatures, sometimes very violently [3], Mixtures with ethylene explode on initiation by sunlight, etc., or over mercury, mercury oxide or silver oxide at ambient temperature, or over lead oxide at 100°C [1,4], Interaction with ethane over activated carbon at 350°C has caused explosions, but added carbon dioxide reduces the risk [5], Accidental introduction of gasoline into a cylinder of liquid chlorine caused a slow exothermic reaction which accelerated to detonation. This effect was verified [6], Injection of liquid chlorine into a naphtha-sodium hydroxide mixture (to generate hypochlorite in situ) caused a violent explosion. Several other incidents involving violent reactions of saturated hydrocarbons with chlorine were noted [7],... 

Jang and McDow (1997) studied the photodegradation of benzo[a]anthracene in the presence of three common constituents of atmospheric aerosols reported to accelerate benzo [a] anthracene, namely 9,10-anthroquinone, 9-xanthone, and vanillin. The photo-degradation experiments were conducted using a photochemical reactor equipped with a 450-W medium pressure mercury arc lamp and a water bath to maintain the solution temperature at 16 °C. The concentration of benzo [a] anthracene and co-solutes was 10" M. Irradiation experiments were conducted in toluene, benzene, and benzene-c/e- Products identified by GC/MS, FTIR, and NMR included benzo[a]an-thracene-7,12-dione, phthalic acid, phthalic anhydride, 1,2-benzenedicarboxaldehyde, naphtha-lene-2,3-dicarboxylic acid/anhydride, 7,12-dihydrobenzo[a]anthracene, 10-benzyl-10-hydroan-thracen-9-one, benzyl alcohol, and 1,2-diphenylethanol. 

Changing the pump fluid The interior section will be extracted from the pump and the contaminated pump fluid poured out. The interior section and the pump body are then cleaned with pure petroleum ether (naphtha). The interior section and pump body of mercury pumps should have been cleaned beforehand with a clean brush use a bottle brush for the nozzle bores. Ensure that all the nozzle orifices are properly cleaned. It is advantageous to evaporate all solvent residues in a drying kiln. Then the inside section is inserted once again and the fresh pump fluid is installed through the forevacuum port. It is necessary to ensure that the upper nozzle cover is not moistened with pump fluid Do not install too much pump fluid ... 

Preparation,—The processes already described for the production of potassium are applicable also, with slight modifications, for the preparation of sodium. The apparatus required is also of exactly the same description as in the case of potassium. The substances employed are either hydrated soda and iron, or carbonate of soda and charcoal. These are placed in a malleable iron, bottle—those in which mercury Is imported answer admirably—and heated to whiteness in a powerful wind furnace. The gas, which after some time makes its appearance, is conducted into a receiver of iron or copper containing mineral naphtha or rook oil, and which receiver is kept cold by surrounding it with cold water, which is frequently changed. It should, of course, be provided with a vent for the escape of the incondensable gases evolved during the decomposition. The operation is much more productive than in the case of potassium, owing to the fortunate circumstance that sodium does not combine with carbouio oxide. 

Many metal salts are well-known primary skin irritants. These substances include antimony trioxide, arsenic trioxide, chromium and alkaline chromates, cobalt sulfate, nickel sulfate, mercury chloride, and zinc chloride. In addition to the above industrial chemicals, several solvents are known to act as primary skin irritants among workers, such as, carbon tetrachloride (CCI4), chloroform, ethylene dichloride, epichlorohydrin, ethylene chlorohydrin, perchloroethylene, and trichloroethylene, in addition to cool tar solvents such as naphtha, toluene, and xylene. 

Because many petrochemical operations use cryogenic separation to separate hydrogen in the cracked streams, it is important to maintain the stream free of mercury. Mercury can contaminate naphtha, especially if it is derived from natural gas condensate since traces of mercury can be found in most natural gas". Mercury in naphtha is readily removed using carbon sieve technology. ... 

General chemistry labs mostly inorganic wastes, heavy metals, iodine, xylene, naphtha, P-dichlorobenzene, mercury, chromium, lead, and carbon tetrachloride. Organic chemistry labs mostly organic solvents, some organic solids and chromium salts. 

Axens Contaminant-free condensate, naphtha Condensate, Naphtha To produce mercury, arsenic and lead-free feedstocks to refineries and steam crackers 20 2004... 

Crude oil is known to contain volatile mercury because mercury is found concentrated in the liquefied petroleum gas (LPG) and naphtha fractions of the atmospheric distillation when oil is refined. It is known conclusively that elemental mercury is at least one of the volatile mercury species in crude oil because it sometimes is found condensed in trays in refinery distillation towers and condensed in cryogenic heat exchangers that liquefy petroleum gases. What is not known is whether elemental mercury is the only volatile species. 

Three independent laboratories, each using a different method, were selected to analyze crude oil samples. One objective of the project was to identify methods and procedures that could be used by industrial or academic laboratories to analyze crude oil for mercury in a practical fashion. The practicality of a method is a function of sample processing steps, reagent availability, instrumental analysis time, instrument expense, detection limit, and accuracy of result. Crude oils exhibiting total mercury concentrations (THg) below 1-2 pg/kg are not problematic to refining, but some specifications for refined products (naphtha) are set close to 1 pg/kg thus a method detection limit (MDL) of 0.1-0.3 pg/kg was deemed acceptable for routine quality assurance (QA) purposes. Differentiating mercury concentrations below 1 pg/kg may have academic utility, but an MDL of 10 ng/kg (parts per trillion) is not necessary for oil quality determinations or for assessment of atmospheric emissions attributable to petroleum. 

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