Ansul Chemical

It is quite feasible to run the reaction at a bath temperature of 90-95° by adding all reagents to the flask initially a quantitative evolution of carbon dioxide occurs over a period of about 18 hours. The reaction can also be carried out in refluxing 1,2-dimethoxy-ethane (Arapahoe Chemicals, Inc.) over a period of about 50 hours (yield 40-55%), or in triethylene glycol dimethyl ether (Ansul Chemical Company) at a bath temperature of 160° over a period of 2 hours (yield 64%). 

The 1,2-dimethoxyethane (Ansul Chemical Co.) was predried for several days over calcium hydride, filtered, and stored over lithium aluminum hydride prior to its distillation at atmospheric pressure immediately before use. For a larger-scale preparation it is expeditious to distil simultaneously from two 5-1. flasks rather than from a single large one. Under these conditions, distillation of the glyme can be completed in 8-10 hours. 

Commercial diglyme (dimethyl ether of diethylene glycol) was obtained from Ansul Chemical Company, Marinette, Wisconsin, and purified by distillation from lithium aluminum hydride at 62-63° (15 mm )2... 

Ansul Chemical Co., Ansul Ethers, Chem. Prod. Bull. 

Purification. A 1-1 portion of diglyme (Ansul Chemical Co.) is stored over 10 g. of small pieces of calcium hydride for 12 hrs. and decanted into a distilling flask. Sufficient lithium aluminum hydride is added to ensure an excess of active hydride (see purification of THF), and the solvent is distilled at 62-63°/15 mm. and stored under nitrogen. 

Anonym (1970) Ansul Technical Inform. Bulletin. 1, p. 3. Ansul Chemical. 

The sales of many new chemicals remain small for several years after introduction and about half of new chemicals are discontinued because they are not commercially viable. The chemical group of the Ansul Company provided a useful example in its November 1979 comments on Premanufacture Notification of how the sales volume of one of its typical chemical products grew from 1,000 pounds to only 10,000 pounds in five years ( 5). 

Class D fires involve strong reducing agents such as active metals (magnesium, titanium, zirconium, and alkali metals), metal hydrides, and organome-tallics. Special dry-chemical fire extinguishers are available for these fires (e.g., Ansul Co.). Sand is also useful for small fires of this type. Water should be avoided because it promotes the fire by liberation of hydrogen or hydrocarbons. 

A pail of powdered limestone and a long-handled shovel are recommended by Ventron for smothering a lithium aluminum hydride fire. The only commercial extinguishers recommended are those of the nitrogen-propelled dry powder type, such as Ansul. In no case use water, carbon dioxide, or a chemical extinguisher. 

Met-L-KYL [Ansul]. TM for a dry chemical that extinguishes fires caused by pyrophoric liquids such as triethylaluminum and adsorbs the spilled metal alkyl to prevent reignition. 

Under the patent misuse doctrine, courts have put restrictions on the methods of issuing label licenses. The courts have generally held that a patent holder may not license others to use its unpatented products in the patented manner, while refusing to license its patent to parties that purchase the unpatented goods from its competitors. Moreover, patentees have been found to have misused patents by charging higher royalty rates to licensees who use the unpatented products of competitors than to purchasers of their own products. See, e.g., BJB. Chemical Co. v. Ellis, supra Ansul Co. v. Uniroyal Inc., 448 F.2d 872 (2nd Cir. 1971), cert, denied, 404 U.S. 1018 (1972). 

Dry chemical with stainless steel shells Dry chemical—stored pressure Dry chemical—cartridge (Ansul type)... 

---