Sodium hexametaphosphate SHMP

Neutral phosphates such as sodium hexametaphosphate (SHMP)... [Pg.420]

Early antisealants used sodium hexametaphosphate (SHMP) as a threshold agent to inhibit the growth of calcium carbonate and sulfate-based scales.6 Most antisealants on the market today contain sulfonate, phosphate, or carboxylic acid functional groups. Perhaps the most effective antisealants today contain and blend of polyacrylic acid (PAA) and phosphoric acid or polyacrylate and a hydroyethylidene diphosphonate (HEDP).12 The polyacrylate-HEDP blends also claim to have good dispersion qualities toward silts and clays.12 Some new inhibitors include a chelant and disper-ant to keep suspended solids such as iron and manganese oxides in solution. These newer antisealants are generally more effective than SHMP for a variety of potential scales.6... [Pg.178]

Sulfuric acid and sodium hexametaphosphate (SHMP) are injected in the feedwater line upstream of the cartridge filters. The sulfuric acid is injected to adjust the feedwater pH to a level of between 4 and 6. The purpose of acid injection is twofold. The primary purpose is to mitigate the possibility of calcium carbonate deposition by conversion of bicarbonate to carbon dioxide. Coincidentally, the rejection performance of the thin film composite membrane is pH sensitive and the optimum performance is at the operating pH level. SHMP is added to the feedwater as a threshold inhibitor to inhibit the crystalline growth of sparingly soluble salts such as calcium sulfate. [Pg.294]

A reduction of particle adhesion has been found in aqueous solutions of a complexing agent sodium hexametaphosphate (SHMP). Our studies with sodium hexametaphosphate with a labeled phosphorus atom have shown that this compound, like certain condensed polyphosphates, may be sorbed on the surface of the contiguous bodies and thereby will facilitate detachment of particles. [Pg.203]

Fig. IV.19. Adhesion number of glass particles 40-60 p in diameter with respect to steel surfaces in aqueous solutions of OP-10 and sodium hexametaphosphate (SHMP) as a function of the detaching force. 1) O.OOOl o solution of SHMP 2) 0.0001 0 solution of OP-10 3) l.Qf o solution of OP-10 4) l.O o solutions of SHMP.

NOTE PAA = Polyacrylic acid or sodium salt SHMP = Sodium hexametaphosphate SSMA = Sulfonated styrene maleic anhydride... [Pg.410]

SHMP. See Sodium hexametaphosphate Sienna. See Iron oxide yellow... [Pg.1335]

Synonyms Glassy sodium Hexametaphosphate sodium salt Hexasodium metaphosphate HMP Metaphosphoric acid, hexasodium salt Phosphate, sodium hexameta- SHMP Sodium polymetaphosphate Ciassification Inorganic salt Empiricai OuPs 6Na Formuia (NaPOjjs... [Pg.1347]

SHMP Sodium hexametaphosphate, a sequestering agent used for complexing calcium sulphate, thereby preventing CaS04 from precipitating on the membrane surface. [Pg.378]

Regulatory Canada DSL Manuf/Distrib. Aarhus Karlshamn AB Trade Names Containing Fancol VB Shea butter extract. See Shea butter (Butyrospermum parkii) extract SHMP. See Sodium polyphosphate Sodium hexametaphosphate Shorea robusta gum. See Dammar... [Pg.2418]

Synonyms Glassy sodium phosphate Polyphosphoric acid sodium salt Polyphos-phoric acids, sodium salts SHMP Sodium hexametaphosphate Sodium polyphosphate, amorphous Empirical (NaPOjjn... [Pg.2455]

SYNS CALGON CHEMI-CHARL HEXAMETAPHOSPHATE, SODIUM SALT HMP MEDI-CALGON PHOSPHATE, SODIUM HEXAMETA POLYPHOS SHMP... [Pg.1256]

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