Silver phosphate, mono

Conventional catalysts consist of about 86 percent silica and 14 percent alumina and yield predominantly TMA, which is in the least commercial demand. The undesired TMA is separated and recycled to the reactor for disproportionation into other amines. U.S. patent 3,387,032 claimed that by adding 0.05 to 0.95 percent silver phosphate, rhenium heptasulfide, molysulfide, or cobalt sulfide to the conventional catalyst, with the proper steam treatment, the selectivity of the catalyst is shifted in favor of mono- and di- at the expense of tri-. The relative increases of MM A and DMA in the reactor effluent are 67 percent and 98 percent, respectively. The corresponding decrease in TMA is 63 percent. 

Ammonium metaphosphates.—The product obtained by H. N. Stokes6 by boiling monamidophosphoric acid, NHa.PO(OH)2, is either ammonium mono-metaphosphate, or a mixture of different metaphosphates—vide infra. G. Tam-mann prepared microscopic crystals of what he called ammonium /3-monometa-phosphate, NH4P08, by crystallization in the cold of a soln. of phosphorus pentoxide and glassy metaphosphoric acid with ammonium carbonate. A soln. of the purified salt gives a white precipitate with silver nitrate. The air-dried salt has the composition NH4P03.3,4H2O and it passes in a few weeks into the orthophosphate. 

FPOaKj Potassium monofluoro-phosphate, 3 109 FPOa(NHj)j Ammonium mono-fluorophosphate, 2 155 FPOaNas Sodium monofluoro-phosphate, 3 106, 108 F2Ag Silver(II) fluoride, 3 176 F2Ca Calcium fluoride, 4 137 FjHg Mercury(II) fluoride, 4 136 F2KH Potassium hydrogen fluoride, 1 140... 

Phosphatidylglycerol phosphate was synthesized by Bonsen and de Haas (1967). l,3-Di-iodo-2-0-tert-butylglycerol was reacted with the silver salt of l,2-diacyl-5 -glycerol-3-(mono benzyl) phosphate to produce the mono-condensation product. This was reacted with the silver salt of di-rm-butyl phosphate and then anionic debenzylation and treatment with hydrogen chloride yielded 3-5w-phos-phatidyl-1 -rac-glycero-3 -phosphate. 

---