Ansul

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. 

Diglyme (Ansul Ether 141) was predried over calcium hydride and distilled under reduced pressure from lithium aluminum hydride b.p. 62-63° (15 mm.).3 The yield of olefin is dependent on the dryness of the solvent. The formation of 2-phenyl-2H-perfluoropropane is favored by the presence of water in the solvent. 

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). 

Ansul Company, "Comments on EPA Reproposal of Premanufacture Notification Form and Provision of Rules", November 29, 13/9. 

Ansul Edier 121 Anthracene Anthracin Antimony Butter Antimony (III) Chloride Antimony (V) Chloride Antimony Pentachloride Antimony Pentafluoride Antimony Perchloride Antimony Potassium Tartrate Antimony Trichloride Antimony Trifluoride Antimony Trioxide Aparasin Aphtiria APO... 

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... 

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. 

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

As with the acid treatment, application can be made by shovel, hand-portable device, or larger wheeled or stationary units. A typical application measure might be a 10-lb pail of agent to a 10-ft2 spill, which is a typical 3-gallon spill. Treatment time is usually 10 to 20 minutes, during which period only a moderate amount of heat is produced. The resulting residue will also be pastelike and harden over time (ANSUL, 1991b). 

American Industrial Hygiene Association. 1992. Emergency Response Planning Guidelines for Air Contaminants. Fairfax, VA American Industrial Hygiene Association, May. ANSUL. 1991a. Spill-X-A Acid Neutralizer Data Sheet. Marinette, Wisconsin ANSUL Fire Protection. 

ANSUL. 1991b. Spill-X-C Caustic Neutralizer Data Sheet. Marinette, Wisconsin ANSUL Fire Protection. 

SYNS ANSUL ETHER 181AT BIS(2-(2-METH-OXYETHOXY)ETHYL) ETHER BIS(2-METHOXY-... 

Diglyme, CH30CH.2CH20CHjCH20CH3. Mol. wt. 134.17, b.p. 161 , miscible with water. Suppliers Ansul Chem. Co., (pure) BJ. 

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. 

Fire control. Lithium fires can be controlled by smothering with anhydrous lithium chloride or with Ansul Plus 50 fire-extinguishing compound. 

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. 

Foray [Ansul]. TM for a monoammonium phosphate-based formulation used to extinguish fires in flammable liquids (Class B fires) and in combustible materials such as wood and paper (Class A fires). 

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. 

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