Grasselli Chemical

The dimethylformamide is available as technical grade DMF from the Grasselli Chemicals Department of E. I. duPont de Nemours and Company, Wilmington, Delaware. 

Technical grade DMF is available from the Grasselli Chemicals Department of E. I. duPont de Nemours and Company. The 1,4-dichlorobutane was obtained from the Electrochemicals Department, E. I. duPont de Nemours and Company. Technical Baker and Adamson fused chip sodium sulfide assaying 60% sodium sulfide was used. The checkers obtained somewhat lower yields when the appropriate amount of reagent grade Na2S OHjO was employed instead of the technical material. 

See, for example, Grasselli Chemical Co., Assess, of Tanner, Canadian Patent, 260934 (1924). 

N 26.16% OB to CO SO2 minus 21.4% crysts (from benz) mp 88.5—90° bp ca 160° and its vapor expl above 160°(Franchimont) acedg to Aaronson (Ref 6) it decompd at 170°(in 5 sec) and detonated at 180°, while below 180° only light grey smoke was observed. Acedg to Shriner (Ref 7) it decompd at 135° in 8 mins. It is si sol in w very sol in benz, chlf hot ale sol in eth petr eth was first ptepd by Franchimont (Ref 3) by nitration of dimethylsulfamide with 98% nitric acid. Aaronson prepd it at PicArsnLab (Ref 6) by nitrating pure dimethylsulfamide (obtd from the Grasselli Chemical Department of the duPont Co) with 95% nitric acid. 

Experimental Laboratory, Grasselli Chemicals Department, E. I. du Pont de Nemours Company, Inc., Cleveland, Ohio. 

Valleyfield, QC, which was supplied pyrites from Noranda, QC. When the Canadian patents expired in 1922, other companies opened Contact plants. Among the first was the Grasselli Chemical Company at Hamilton, ON, in 1922 (the site later became part of CIL and then ICI Canada the sulphur business of ICI Canada became Marsulex which was acquired by Chemtrade in 2011) a Chamber plant had existed since 1912. The sulfur source for Hamilton had been pyrites from Peterborough, ON, imtil 1920, when they switched to elemental sulfur. 

Oxford Copper and Sulfur Company - 1880 s Grasselli Chemical Company - 1887. 

Adding to their woes, the largest sulfur market, the manufacture of sulfuric acid, had disappeared in the U.S. When Frasch had filed his patent over 80% of the rapidly growing American sulfuric acid industry used elemental sulfur as its raw material. By 1901, 85% of the industry had switched to pyrites. The only major acid producers using elemental sulfur were Kalbfleisch (later purchased by Cyanamid in 1929) and Grasselli Chemical Company of Cleveland. Most of the sales of Union Sulfur had been through Petit Parsons in New York City for resale. Other shipments were made to a sulfite pulp mill in Wisconsin and fertilizer manufacturer in Meridian, MS. 

Grasselli Chemical, a well-known manufacturer of sulphuric... 

Bayer (Farbenfabriken vorm. Friedr. Bayer Co., Germany), 117, 194, 232 and Grasselli Chemical... 

Grasselli Chemical Company, 34, 248 Bayer purchase, 165, 174 German relations, 245 6... 

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