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Recovery, coatings industry, solvent

Enclosed agitated filters are useful when volatile solvents are in use or when the solvent gives off toxic vapor or fume. Another significant advantage is that their operation does not require any manual labor. Control can be manual or automatic, usually by timers or by specific measurements of the product. Most filters are made of mild steel, with the exposed surfaces protected by lead, tile, mbber lining, or by coating or spraying with other substances as necessary. Filtration areas up to 10 m are available and the maximum cake thickness is 1 m. Apphcations are mainly in the chemical industry for the recovery of solvents. [Pg.394]

Solvent Recovery. Most of the activated carbon used in gas-phase applications is employed to prevent the release of volatile organic compounds into the atmosphere. Much of this use has been in response to environmental regulations, but recovery and recycling of solvents from a range of industrial processes such as printing, coating, and extmsion of fibers also provides substantial economic benefits. [Pg.535]

The above described process is an in-process recovery of raw materials, which are used for production of a final product. Such processes are developed in industry to make technology more efficient or to reduce waste. In fabric coaling, the edge trimming produces 6 to 10% of all wastes. Recovery of raw materials is essential for the coated fabric industry. This initiated munerous attempts in developing plasticizer (among other raw materials) recovery systems based on the solvent extraction or the steam distillation processes. Two reasons hinder the use of these processes economy and quality of the plasticizer. Production usually involves several different plasticizers, which are difficult and costly to separate. ... [Pg.640]

Nuclear Energy. The nuclear energy industry requires many solvents and reaction agents for the separation and purification of the fuel used in the reactors. Special coatings and other materials used in the vicinity of intense radiation were developed by the chemical industry. Recovery of the spent nuclear fuel requires specially developed techniques, again requiring solvents and reactions. [Pg.301]

The recovery of organic vapors from waste gas streams using polymeric membranes is a well established process (7). Typically, composite membranes are used for this process. These membranes consist of a diin, selective rubbery layer coated onto a microporous support material. The selectivities of these membranes for organic vapors over nitrogen are typically about 10-100. Currently, commercial vapor separation membrane applications include small systems (10-100 scfin) to recover fluorinated hydrocarbons (Freons) and other high-value solvent vapors from process vent streams to large systems (100-1,000 scfin) for recovery of hydrocarbon vapors in the petrochemical industry (7). [Pg.55]


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