Calcium carbonate metaborate

Numerous methods for the synthesis of salicyl alcohol exist. These involve the reduction of salicylaldehyde or of salicylic acid and its derivatives. The alcohol can be prepared in almost theoretical yield by the reduction of salicylaldehyde with sodium amalgam, sodium borohydride, or lithium aluminum hydride by catalytic hydrogenation over platinum black or Raney nickel or by hydrogenation over platinum and ferrous chloride in alcohol. The electrolytic reduction of salicylaldehyde in sodium bicarbonate solution at a mercury cathode with carbon dioxide passed into the mixture also yields saligenin. It is formed by the electrolytic reduction at lead electrodes of salicylic acids in aqueous alcoholic solution or sodium salicylate in the presence of boric acid and sodium sulfate. Salicylamide in aqueous alcohol solution acidified with acetic acid is reduced to salicyl alcohol by sodium amalgam in 63% yield. Salicyl alcohol forms along with -hydroxybenzyl alcohol by the action of formaldehyde on phenol in the presence of sodium hydroxide or calcium oxide. High yields of salicyl alcohol from phenol and formaldehyde in the presence of a molar equivalent of ether additives have been reported (60). Phenyl metaborate prepared from phenol and boric acid yields salicyl alcohol after treatment with formaldehyde and hydrolysis (61). [Pg.293]

Barium metaborate Bis (P-chloroethyl) vinyl phosphonate Calcium sulfate dihydrate Chlorinated n-paraffins (C6-C18) Dibromostyrene Dimelamine phosphate Dimethyl hydrogen phosphite Ethylenebis dibromonorbornane dicarboximide Ethylene diamine phosphate Isobutylbis (hydroxypropyl) phosphine oxide Magnesium carbonate Magnesium hydroxide Melamine cyanurate... [Pg.5264]

A recent publication by Flaaten et al. has claimed that borates, notably sodium metaborate, unlike conventional alkalis, exhibit a remarkable tolerance toward hardness ions, in this application [19], This discovery will allow (notably carbonate) reservoirs with hard saline brines to benefit from the use of ASP flooding technology, where previously this was not possible. The metaborate ion is known to form ion-pair complexes with hardness ions, for example, the reaction with calcium ion is as follows ... [Pg.443]