Abstract: A computer-automated maintaining of circuit breakers in a power distribution infrastructure based upon operating conditions recorded during breaker events of particular identified circuit breakers is described herein. The breaker event data sets are accumulated initially by file servers in a variety of formats. A parser performs an automated parsing of the breaker event data sets to render breaker event records that are thereafter stored in a central data repository. Maintenance engines apply data analysis and decision logic to particular event records for particular identified circuit breakers obtained from the central data repository and issue requests for actions to be taken with respect to the particular identified circuit breakers based upon operating conditions experienced by the particular identified circuit breakers.

Abstract: Phenyldichlorophosphine is prepared by contacting benzene with phosphorus trichloride in the vapor phase at a temperature from about 100.degree. C. to about 145.degree. C. in the presence of a catalyst consisting essentially of aluminum metal and an activating amount of aluminum chloride.

Abstract: Lower alkyl bis-(.beta.-carboxyethyl) phosphine oxides are prepared from lower alkyl bis-(.beta.-cyanoethyl) alkyl phosphine by oxidizing the phosphine to cyanoethyl phosphine oxide, hydrolyzing the cyanoethyl phosphine oxide with calcium hydroxide to produce a calcium salt of lower alkyl bis-(.beta.-carboxyethyl) phosphine oxide, and acidifying the calcium salt to produce lower alkyl bis-(.beta.-carboxyethyl) phosphine oxide.

Abstract: Lower alkyl bis-(.beta.-carboxyethyl) phosphine oxides are prepared from tris-cyanoethyl phosphine in a functionally coordinated sequentially ordered process comprising alkylating the tris-cyanoethyl phosphine to a phosphonium salt, dequarternizing the phosphonium salt to a lower alkyl bis-(.beta.-cyanoethyl) phosphine, oxidizing the phosphine to phosphine oxide, hydrolyzing the phosphine oxide with calcium hydroxide to produce a calcium salt of lower alkyl bis-(.beta.-carboxyethyl) phosphine oxide, and acidifying the calcium salt to produce lower alkyl bis-(.beta.-carboxyethyl) phosphine oxide.

Abstract: Lower alkyl bis-(.beta.-cyanoethyl) phosphines are prepared from tris-cyanoethyl phosphine by alkylating tris-cyanoethyl phosphine to a phosphonium salt, and dequarternizing the phosphonium salt to a lower alkyl bis-(.beta.-cyanoethyl) phosphine.

Abstract: By mixing one part of a prepolymer containing a polyamine partially polymerized with an organic epoxide and subsequently reacted with a fatty acid containing from 8 to 32 carbon atoms, and then reacting this prepolymer mixture with 3 parts of an organic epoxide, a composition was obtained which made a gas frothable, shear-stable, room temperature curing, low density foam. A particularly advantageous prepolymer was prepared using a polyamine selected from the group consisting of diethylenetriamine, triethylenetetramine, and tetraethylenepentamine, partially polymerized with an organic epoxide having an average molecular weight of about 350 and having an epoxide equivalent of 185 to 192, and reacted with 2-10 weight percent linoleic acid.