Abstract: A description follows of an aqueous dispersion of heavy oil residues, suitable for undergoing combustion with a low emission of SOx, comprising: (a) a heavy oil residue; (b) a dispersing agent; (c) a desulfurizing agent selected from CaCO3, MgCO3, dolomite and relative mixtures; (d) a desulfurizing agent with stabilizing and anti-corrosive properties selected from MgO, Mg(OH)2, CaO, Ca(OH)2 and relative mixtures; (e) water; the weight percentage of (e) with respect of the sum of (a)+(e) being at least 15%.

Abstract: A description follows of an aqueous dispersion of heavy oil residues, suitable for undergoing combustion with a low emission of SOx, comprising: (a) a heavy oil residue; (b) a dispersing agent; (c) a desulfurizing agent selected from CaCO3, MgCO3, dolomite and relative mixtures; (d) a desulfurizing agent with stabilizing and anti-corrosive properties selected from MgO, Mg(OH)2, CaO, Ca(OH)2 and relative mixtures; (e) water; the weight percentage of (e) with respect of the sum of (a) + (e) being at least 15%.

Abstract: Process for reducing the adsorption of hydrosoluble polymers onto rock matrix, which comprises putting the rock matrix in contact with an aqueous solution of polymers containing sacrificial agents, preferably selected from ionic and non-ionic oligomeric surface-active agents. In the preferred embodiment the surface-active agents are non-ionic.

Abstract: Block copolyethers having general formula (I):RX--(CH.sub.2 --CHR.sub.1 --O--).sub.x --(--CH.sub.2 CHR.sub.2 --O--).sub.y --(--CH.sub.2 --CHR.sub.3 --O--).sub.z --R.sub.4wherein:R is selected from H, alkyl, alkylaryl;X is selected from O, S and N;R.sub.1, R.sub.2 and R.sub.3 are selected from H, CH.sub.3, and C.sub.2 -C.sub.10 alkyl radicals;R.sub.4 is selected from H, alkyl, acyl;x,y,z represent the number of ether units and are integers which have such values that the molecular weight of the compound having general formula (I) is between 600 and 4000, and in addition (x+z)/y is between 1.5 and 5.0; with the proviso that:a) either R.sub.1 and R.sub.3 are selected from H and CH.sub.3, in which case R.sub.2 is selected from C.sub.2 to C.sub.10 alkyl radicals,b) or R.sub.1 and R.sub.3 are selected from C.sub.2 -C.sub.10 alkyl radicals, in which case R.sub.2 is selected from H and CH.sub.3.

Abstract: Process for the consolidation of sand in a well which produces fluids, particularly oil and/or gas, comprising the following steps:1) optional preflush with an aqueous solution of inorganic salts, preferably KCl;2) injection into the formation of a consolidating agent essentially consisting of an aqueous solution of sodium silicate in water;3) flushing with an inert gas, preferably nitrogen, of the formation treated in step (2) until the excess consolidating agent and water injected in step (2) have been removed;4) subsequent introduction into the formation thus treated of an aqueous solution of an acid having a pKa at 25.degree. C. of between 3 and 10, preferably selected from ammonium chloride and acetic acid.

Abstract: A thermotropic polyesterimide, in which the liquid-crystalline phase is of nematic structure within a useful temperature range, consists of units of formula: ##STR1## the units being in the following ratios:a/(b+c)=1c/b=0-50/50, and preferably c/b<30/70The polyesterimide of the present invention possesses self-reinforcement characteristics, or reinforcement characteristics for traditional thermoplastic materials.

Abstract: Water insoluble polymers containing hydrophilic pendant moieties ending with a chelating group are disclosed. The polymers are useful in the purification of water polluted by heavy metals such as mercury and lead. The polymers have the general formula P--(--(--O--R).sub.n --(NH--Q).sub.p --F).sub.m where P is a polymeric matrix capable of reacting with a polyalkylene glycol or an alkylene oxide having such a structure and molecular weight as to be insoluble in water; R is either --CH.sub.2 CH.sub.2 -- or mixtures of --CH.sub.2 CH.sub.2 -- and --CH.sub.2 CH(CH.sub.3)--, with the molar ratio of both units in the mixture being at least 3:1; n is 3 to 50; m is a numeral such that the % by weight of all of the --(--(--O--R--).sub.n (NH--Q).sub.p --F hydrophilic chains is higher than 1% by weight of the total weight of (I); Q is a C.sub.2 -C.sub.

Abstract: A thermotropic copolyester, which displays a liquid-crystal phase of nematic type, within a desired temperature range, contains units deriving from:(a) a saturated, aliphatic dicarboxy acid;(b) 4,4'-dihydroxy-biphenyl and/or mono- or di-alkyl- or -alkenyl-derivatives thereof;(c) 4-hydroxy-benzoic acid and/or alkyl- or alkenyl-derivatives thereof.Such a copolyester improves the processability of unsaturation-containing elastomers and enhances the mechanical properties of subsequently vulcanized products.

Abstract: An improved process for preparing carboxylated 2-allyl-phenols of general formula (I): ##STR1## is disclosed, which consists of a first step of simultaneous esterification and etherification of a carboxylated phenol, subsequent rearrangement of the resulting product to yield allyl-carboxylated allyl-phenol and end saponification of the latter into carboxylated 2-allyl-phenol.