Resin acids pollution from

National Emission Standards for Hazardous Air Pollutant Emissions Group I Polymers and Resins National Emission Standards for Hazardous Air Pollutants for Epoxy Resins Production and Non-Nylon Polyamides Production National Emission Standards for Hazardous Air Pollutants From Secondary Lead Smelting National Emission Standards for Marine Tank Vessel Tank Loading Operations National Emission Standards for Hazardous Air Pollutants From Phosphoric Acid Manufacturing... 

Sulfite paper has a relatively short life span, since residual acid will continue to hydrolyze the cellulose and cause embrittlement. Further sources of acid include aluminum sulfate (which is added together with resin to suppress bleeding or feathering of ink into the paper) and S02 and NO from the atmosphere. Much of the world s library collections and archives will soon be lost as the paper crumbles. Various deacidification treatments (e.g., with ammonia, morpholine, cyclohexylamine carbamate, or diethyl-zinc) have been proposed and tried, but at best they can only halt the process of embrittlement and cannot reverse it.14 With the move to kraft pulping, alkaline peroxide bleaching, and increasing use of precipitated calcium carbonate as a filler, the high quality papers produced today are intrinsically acid free and should also resist subsequent acidification by S02-polluted air fairly well. 

Acrylic acid [79-10-7] - [AIR POLLUTION] (Vol 1) - [ALDEHYDES] (Vol 1) - [ALLYL ALCOHOL AND MONOALLYL DERIVATIVES] (Vol 2) - [MALEIC ANHYDRIDE, MALEIC ACID AND FUMARIC ACID] (Vol 15) - [POLYESTERS, UNSATURATED] (Vol 19) - [FLOCCULATING AGENTS] (Vol 11) - [CARBOXYLICACIDS - SURVEY] (Vol 5) -from acetylene [ACETYLENE-DERIVED CHEMICALS] (Vol 1) -from acrolein [ACROLEIN AND DERIVATIVES] (Vol 1) -acrylic esters from [ACRYLIC ESTER P OLYMERS - SURVEY] (Vol 1) -from carbon monoxide [CARBON MONOXIDE] (Vol 5) -C-21 dicarboxylic acids from piCARBOXYLIC ACIDS] (Vol 8) -decomposition product [MAT. ETC ANHYDRIDE, MALEIC ACID AND FUMARIC ACID] (Vol 15) -economic data [CARBOXYLIC ACIDS - ECONOMIC ASPECTS] (Vol 5) -ethylene copolymers [IONOMERS] (Vol 14) -in floor polishes [POLISHES] (Vol 19) -in manufacture of ion-exchange resins [ION EXCHANGE] (V ol 14) -in methacrylate copolymers [METHACRYLIC POLYMERS] (Vol 16) -in papermaking [PAPERMAKING ADDITIVES] (Vol 18)... 

The apparatus can theoretically sample to any depth. However, at depths greater than 100 m, it is logistically diflBcult to anchor and to retrieve. The apparatus could be used to monitor baseline trace metal levels, sewage and industrial metal outfalls, offshore dumping sites, and diffusion of heavy metals from polluted sediments. The concentration apparatus could also be adapted to monitor other compoimds such as methylated mercury, chlorinated hydrocarbons, amino acids, etc. by replacing the Chelex-100 in the columns with other resins specific for the compounds to be monitored. 

This autoxidation property of carbons leads to a continuous loss of catalyst. When spherical carbon particles of 30 to 100 p,m were used in the oxidation with air of aqueous cyclohexanone solutions at 393 K in a trickle-bed reactor, a weak loss of carbon was observed after four weeks, and the originally smooth particles appeared rough and porous in scanning electron microscopy (SEM) [165]. The catalysts used with a nitrogen content of < 1% had been prepared from nitrogen-containing phenol-formaldehyde resin [166]. In this reaction cyclohexanone is oxidized to adipic acid and other dicarboxylic acids. 2-Hydroxycyclohexanone seems to be an intermediate. A carbon loss of several percent was also reported for other wet-air oxidation reactions of pollutants, mainly of phenol [167-169]. 

The high potential of hypercrosshnked resins for sorption of dyes indicates that the sorbents could be successfully used to recover various dyes from wastewaters of the textile industry, in order to return the valuable chemicals again into the dyeing processes and reduce pollution of the environment. Most dyes can be easily desorbed from hypercrosshnked polystyrene with alcohols or by appropriate acidic or basic aqueous solutions, which is hardly possible in the case of activated carbons. 

Produced annually in ton quantities (2). They are industrial objectives for which the riedel-Crafts strategy has frequently been used. From the point of view of pollution prevention, there are a number of reasons why alternatives must be considered. The Friedel-Cr ts pathway involves corrosive and air sensitive acid chlorides, Lewis acids such as duminum chloride, stannic chloride or titanium tetrachloride and solvents such as nitrobenzene, carbon disulfide, carbon tetrachloride or methylene chloride (3). Althou some research directed toward minimizing the amount of Lewis acid needed for the Friedel-Crafts reaction has been reported, this modification requires elevated temperatures (4). Friedel-Crafts reactions conducted with acidic resins nave also been reported. This research appears promising but is in the early stages (5). Obviously, an attractive alternative to the traditional Friedel-Crafts reaction would have an impact on pollution prevention. 

The properties of anion-exchange resins of several types have been described in detail by Kraus and Nelson 351-356) and others (557, 358). Selenium(IV), tellurium(IV), and arsenic(III) and (V) can be extracted from a variety of media 359-361). Thallium(III) and antimony(V) can be separated using the iodide and chloride forms of Dowex-1 (5(52, 363). Beryllium(II) was efficiently extracted by the carbonate form 364, 365) and chromium(III) and lead(II) by the phosphate form of AV-17 resin 366). Zinc(II) can be removed from a solution containing several metals (5(57, 368) and silver in concentrations at the 0.04-ppb level can be extracted from seawater (5(59). Cobalt(II), zinc(II), antimony(III), silver(I), and iron(III) ions have also been extracted from spiked seawater samples by anion exchange even though the actual form of the ions in the aged solution was uncertain (570). Anion resins have been modified with Trilon B (577) and with a-hydroxyisobutyronitrile (572) to increase the extraction of several trace-metal pollutants. Amberlite IRA 400 treated with the sulfonic acid derivative of dithizone can be used to concentrate heavy metals (575). 

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