Sulfur Allied Chemical

Developed by Allied Chemical Company, this process is selective toward removing sulfur compounds. Levels of CO2 can be reduced bv annroximately 85%. This process may be used economically when there a ligh acid-gas partial pressures and the absence of heavy ends in iJic gas., but it will not normally meet pipeline gas requirements. This proc also removes water to less than 7 Ib/MMscf. DIPA can be added to I... 

Boron trifluoride-acetic acid complex Harshaw Chemical Co., Allied Chemical Co. 1,5-Cyclooctadiene A, MCB Sulfur dichloride MCB Boron trifluoride etherate EK, MCB Mercuric acetate MCB Norbornene MCB Calcium carbide MCB Pinacol EK, MCB... 

This is a simple method that gives good yields of LSD with very little (if any) iso-LSD. You will be required to purchase sulfur trioxide from Allied Chemical and Dye Corp (ask for Sulfan B, or SQ3), but this is not a suspicious chemical so ordering is not a problem. 

Dry basis natural mbber compound recipe, in part by wt high ammonia natural latex mbber concentrate, 100.0 potassium hydroxide, 0.5 Nacconal 90F (alkylarenesulfonate (Allied Chemical Co.)), 1.0 zinc oxide, 3.0 sulfur, 1.0 ZMBT, 1.0 zinc die thyldithio c arb am ate (ZEDC) (trade names Ethazate... 

The checkers used Sulfan , a stabilized liquid form of sulfur trioxide which is commercially available from Baker and Adamson, General Chemical Division, Allied Chemical Corp., Morristown, New Jersey. The submitter distilled sulfur trioxide from 65% oleum directly into the reaction flask, a procedure which is described elsewhere.3... 

Regular commercial grade of concentrated sulfuric acid (sp. gr. 1.84) obtained from the General Chemical Division of Allied Chemical Corporation was used. 

Operation. Catalysts were pretreated by first reducing at 500°F under hydrogen for several hours. Presulfiding was accomplished with either an SRC filtrate or Allied Chemical 24 CB creosote oil over a 24-hr period. Allied 24 CB creosote oil contains 0.7 wt % sulfur. At a 10% sulfur removal level approximately 6 wt % sulfur on catalyst was generated. Each set of process conditions was maintained for several hours during which time several balances were taken. Runs lasted up to 180 hr. All runs discussed in this chapter were voluntarily shut down. 

Sulfur trioxide, SOj. Mol. wt 80.07, m.p. 17°, b.p. about 45°. This reagent is available from the General Chemical Division, Allied Chemical and Dye Corp., under the name Sulfan B, a -y-form stabilized with an inhibitor to prevent polymerization. It is used in organic work chiefly in the form of complexes with dioxane, dimethylformamide, and pyridine. 

The Allied Chemical Sulfur Dioxide Reduction Process for Metallurgical Emissions... 

Figure 1. Allied Chemical sulfur dioxide reduction technology typical roaster...

In view of the considerable interest in sulfur dioxide reduction to sulfur both in this country and abroad, Allied Chemical extended the use of this technology to control sulfur dioxide emissions from other metallurgical operations as well as from fossil fuel combustion. The experience gained in design, construction, and operation of the large Canadian facility provided the perspective for continuing process research and parallel engineering development. 

Once the feed stream has been purified, the sulfur dioxide and oxygen dimensions must be defined. Depending upon its source, the sulfur dioxide may vary from a few tenths of 1% to 100% (dry basis), in combinations with oxygen from 0% up to the line shown on Figure 2. The dotted line represents the gas composition that results when 100% sulfur dioxide (dry basis) is diluted with air. The only gas compositions to which Allied Chemical sulfur dioxide reduction technology is not directly applicable are those in the shaded area at the lower left of this diagram. This lower boundary represents a practical limit which has been established by heat balance and thermodynamic considerations rather than by economic factors. 

Engineering, procurement, and construction of the entire facility at NIPSCO is the responsibility of Davy Powergas, Inc. Allied Chemical is providing the sulfur dioxide reduction process technology as well as... 

In summary, Allied Chemical technology for reducing sulfur dioxide to elemental sulfur can be applied directly to a broad range of sulfur dioxide concentrations. As illustrated in Figure 6, the practical range for application of this technology extends from about 4% up to 100% (dry... 

The Wellman-Lord process can be a significant factor in helping domestic power plants to meet the air pollution abatement requirements of the Clean Air Act of 1970. To show its applicability to the utilities industry, Davy Powergas Inc. is building a demonstration installation at the Dean H. Mitchell Station of Northern Indiana Public Service Co. in Gary, Ind. When completed, it will consist of a Wellman—Lord sulfur dioxide recovery unit connected to an Allied Chemical Co. sulfur dioxide-to-sulfur reduction process to produce elemental sulfur. Davy Powergas guarantees emissions of 200 ppm by volume or less of sulfur dioxide at this facility. 

Union Texas Petroleum was the last of the successor companies to Union Sulfur. Union Sulfur did not fold when its sulfur reserves were depleted. When the mine first closed, Union Sulfur prospered becoming an oil and gas exploration and production company. A major source of revenue to the company was the oil reserves found at Sulfur Mine. For a long time they kept the name Union Sulfur even though no longer in the sulfur business. The company name later changed several times-Union Sulfur and Oil in 1950 Union Oil and Gas in 1955 Union Texas Natural Gas in 1960-before becoming part of Allied Chemical in 1962. Allied Chemical spun off the division in 1992, through an 840 million IPO. Union Texas Petroleum had sales of one billion dollars when taken over by ARCO (now part of BP) in May 1998 for 3.3 billion. This is what had become of the dream of Herman Frasch. 

Link and Ponder (1977) reported on the initial operation of the first large Wellman-Lord plant installed on a coal-fired utility power station in the U.S. The FGD plant was retrofitted to Northern Indiana Public Service Company s 115 MW pulverized coal-fired Unit 11 at the Dean H. Mitchell Station in Gary, Indiana. In addition to the Wellman-Lord SO2 removal system, the plant included an Allied Chemical plant for converting the SO2 to elemental sulfur. The acceptance test on the entire FGD system was completed on Septembo 14, 1977, with the following results ... 

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