A method of producing boron trifluoride or phosphorus trifluoride using a metal fluorosulfonate fluoride, MF(FSO.sub.3), as the fluorinating agent is disclosed. Boric acid, H.sub.3 BO.sub.3, and phosphorous acid, H.sub.3 PO.sub.3, respectively, are employed as the boron or phosphorous source.

A method of producing boron trifluoride or phosphorus trifluoride using a metal fluorosulfonate fluoride, MF(FSO.sub.3), as the fluorinating agent is disclosed. Boric acid, H.sub.3 BO.sub.3, and phosphorous acid, H.sub.3 PO.sub.3, respectively, are employed as the boron or phosphorus source.

Disclosed is trisulfosuccinic acid and salts thereof described by the formula: ##EQU1## where one of R.sub.1, R.sub.2, R.sub.3 or R.sub.4 is hydrogen and the remainder are SO.sub.3 M; and where M may be the same or different cation selected from hydrogen or an alkali metal. These compounds may be prepared by aqueous liquid phase reaction of a dihalomaleic anhydride, alkali metal hydroxide and an alkali metal sulfite and are useful as detergent builders.

A polyaspartic acid is obtained from an amino acid having aspartic acid as an essential component thereof without entailing formation of a bulk substance. A method for the production of polyaspartic acid is described which includes heating an amino acid having aspartic acid as an essential component thereof in the presence of water. A novel polyaspartic acid obtained by this method of production is described.

The invention concerns allophanic acid derivatives of formula I and pharmaceutically acceptable metabolically labile esters or amides thereof, and pharmaceutically acceptable salts thereof, in which R.sup.1, R.sup.2, R.sup.3, X.sup.1, Q, X.sup.2 and G have the meanings given in the specification. The invention also concerns processes for the preparation of the allophanic acid derivatives of formula I, pharmaceutical compositions containing them and their use as inhibitors of the binding of fibri...

An acid chloride, bicyclo[2,2,2]oct-7ene-(2.alpha.,3.beta.,5.alpha.,6.beta.)tetracarbonyl chloride (C.sub.12 H.sub.8 O.sub.4 Cl.sub.4) represented by the following formula: ##STR1##

Acrylic acid or methacrylic acid is purified by (a) subjecting a mixture comprising the acrylic acid or methacrylic acid to a sharply defined separation process essentially in the absence of an organic solvent, with the composition of the phase in which the acrylic acid or methacrylic acid accumulates remaining essentially constant when the composition of the other phases participating in the mass transfer changes, then taking off this phase and (b) subjecting at least a part of the remaining ph...

The invention relates to a method of treating and a therapeutical composition for the treatment of Acquired Immuno Deficiency Syndrome (AIDS) and related infections. The composition comprises from 1 to 100% of a complex of Poly(A).Poly(U), preferably associated with other anti-AIDS coagents which act on the HIV virus according to a different mechanism from that of the complex of Poly(A).Poly(U). The composition is suitably administered in 100 to 4000 mg doses and at 3 to 5 day intervals.

The present invention describes devices capable of sensing changes of acidity in a non-aqueous medium. The devices are particularly useful for determining the alkaline reserve in a motor vehicle lubricating oil.

Polymers of maleic, fumaric or malic acids or maleic, fumaric or malic acid and ammonia with amino acids are prepared by heating at 180.degree.-350.degree. C., preferably 200.degree.-300.degree. C. The polymer formed may be converted to a salt by hydrolysis with a metal hydroxide or ammonium hydroxide.