Arsenic manufacture

Arsenic Manufacture of pesticides, glass, Lung cancer,... 

About 1949 Frankford Arsenal manufactured an unusual priming mixture known as the P-4 primer (coded FA675) ... 

Army. 1976. Report on an in-depth pollution survey at Joliet Army Ammunition Plant. Dover, NJ Picatinny Arsenal Manufacturing Technology Directorate. Document no. AD B011415. 

In the course of the war each of the CWS arsenals came to carry out much the same type of operation. Although the original plants at the new Pine Bluff and Rocky Mountain Arsenals were built to carry out certain specific operations, other types of plants were shortly erected at both arsenals. During the war, each of the CWS arsenals manufactured toxic... 

Other Applications. Polyacrylamides are used in many additional appUcations including soil modification (138), dust control (139,140), humidity control (141), protein purification (142), removal of barium from wastewater (143), and removal of arsenic from hydrocarbons (144). Polyacrylamides have been used for many years in sugar manufacture and textile treatment. 

The refined arsenic trioxide is analysed for purity and also tested for solubihty, a term referring to its rate of reactivity with nitric acid this test is important if the arsenic is used in the manufacture of insecticides and herbicides. The product is graded for marketing as white soluble having 99% min AS2O2, white insoluble, or cmde having 95% min AS2O2. 

The predominant use of arsenic ia the United States is ia the manufacture of chemicals. During the 1980s, the market for arsenic chemicals had shifted from cotton farming, where its use is now restricted because of environmental considerations, to wood (qv) preservatives for the protection of lumber and other wood products. Arsenic trioxide is the basic commodity of commerce from which a number of important chemicals are manufactured. 

HP arsenic is used in the manufacture of photoreceptor arsenic-selenium alloys for xerographic plain paper copiers (see Electrophotography). The level of arsenic maybe 0.5%, 5.0%, or 35% present as arsenic triselenide [1303-36-2] As2Se2. 

Adsorption, which utilizes the ability of a solid adsorbent to adsorb specific components from a gaseous or a liquid solution onto its surface. Examples of adsorption include the use of granular activated carbon for the removal of ben-zene/toluene/xylene mixtures from underground water, the separation of ketones from aqueous wastes of an oil refinery, aad the recovery of organic solvents from the exhaust gases of polymer manufacturing facilities. Other examples include the use of activated alumina to adsorb fluorides and arsenic from metal-finishing emissions. 

Inorganic Chemical Manufacture Anliydrous aluminum clUoride Antimony pentaeldoride Antimony trichloride Arsenic cliloride Bismutli trichloride Chlorinated isocyanurates Clilorine tri fluoride Ferric chloride Hydrochloric acid... 

Additions of antimony or phosphorus, in amounts similar to arsenic, are claimed to be also capable of preventing dezincification of a brasses. Most manufacturers use arsenic, however, and it certainly appears desirable to avoid phosphorus, since Bern has shown that this element can, in some circumstances, lead to an undesirable susceptibility to intercrystalline corrosion. The same appears to be true of excessive amounts of arsenic (over about 0-05%). 

Procedure. Follow the conditions recommended by the instrument manufacturers for the determination of arsenic by hydride generation. Typical instrumental... 

Conduct exploratory and engineering activities in the methods and technology of manufacture as applied to assigned commodities and their components, materials and ancillary equipment except projectile metal parts which are the responsibility of Frank ford Arsenal, and specified elements of chemical items which are the re-sponsibility of Edge wood Arsenal. This is to include support of plant/facilities modernization within ARMCOM, abatement of environmental contamination caused by manufacturing processes and exploitation of automation techniques... 

Lauterbach G.T. Davis, Water Pollution Problems Arising from TNT Manufacture , EASP 100-04, Edge wood Arsenal (1971)... 

Sulfuric acid manufacture released both sulfur oxides and arsenic into the environment. 

The local formulator who purchases concentrated products from the manufacturer has his problems. More frequently than not the advent of a new product catches him with a stock of some older chemical which the new one will replace. Lead and calcium arsenates, rotenone, pyrethrum, sabadilla, and others all have lost some usage to the newer economic poisons. Costs such as these cannot be passed on to consumers because of that grand American institution, competition. 

Arsenically treated wood. Discarded arsenically treated wood or wood products that are hazardous only because they exhibit certain toxic characteristics (e.g., contain harmful concentrations of metal or pesticide constituents), are excluded from the definition of hazardous waste. Once such treated wood is used, it may be disposed of by the user (commercial or residential) without being subject to hazardous waste regulation. This exclusion is based on the fact that the use of such wood products on the land is similar to the common disposal method, which is landfilling. This exclusion applies only to end-users and not to manufacturers. 

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