Zinc ammonium carbonate

Chemcor 2 c. [Chem. Ccxp. of Am.] Zinc ammonium carbonate. 

Paint Stability. Table III shows that paints containing the higher levels of zinc oxide had a greater viscosity drop after heat aging, and gelled after three freeze-thaw cycles. At 0.5 eq of zinc per COOH unit, both the zinc oxide and zinc ammonium carbonate paints were stable. 

Ionic cross-linking of the water-sensitive carboxyl groups in the HASE thickeners (and probably other carboxyl groups in the paint) with either low levels of zinc oxide in the mill base or post-added zinc ammonium complexes can be effective in improving the early blister resistance of HASE-thickened latex paints over heavily chalked latex paint surfaces. Of the zinc ammonium complexes evaluated, the zinc ammonium carbonate and bicarbonate ap-... 

Trimethytoipropane triacryiate Tris (2-hydroxyethyl) isocyanurate triacryiate Tris (2-hydroxyethyi) isocyanurate trimethacrylate Tyzor AA Tyzor DC Tyzor LA Tyzor TBT Tyzor TE Tyzor TOT Tyzor TPT Urea-formaldehyde resin, methylated. Zinc ammonium carbonate... 

Zinc oxide [1314-13-2] (mol wt 81.37 Cl Pigment White 4, Cl No. 77947) is a white or yellowish white amorphous, odorless powder with pH 6.95—7.37. It is practically iasoluble in water but soluble in dilute acetic acid, mineral acids, ammonia, ammonium carbonate, and alkaU hydroxides. 

Pytlewski, L. L Rep. AD-A028841, 13, Richmond (Va.), USNTIS, 1976 Contact of gaseous ammonia with the /V-chlorourea. either alone, or mixed with zinc oxide, leads to ignition. The same could happen in contact with cone, aqueous ammonia, solid ammonium carbonate or organic amines. 

Excess ammonia is evaporated from the resulting extraction raffinate and zinc is precipitated as carbonate by the remaining ammonium carbonate in the solution or by addition of carbon dioxide. The evaporated ammonia is absorbed in the filtrate and recycled to the leaching step. 

The requisite hydroxylamine function for such cyclizations can also be generated from a precursor having a nitro group. This novel route has provided access to hitherto unknown l-hydroxy-6-allyl-, and -6,6-bisallyl-piperazine-2,5-diones (91UP1). The starting material is an W-nitroacetyl amino acid ester that can be either mono-or bis-allylated at the methylene adjacent to the nitro group. Reduction of the N02 to NHOH using zinc/ ammonium chloride, followed by cyclization, leads to the desired products (Scheme 76). Compound (215) is unique in that it possesses a chiral center at C-3 and a quaternary carbon at C-6 on a l-hydroxypiperazine-2,5-dione system. 

Salts of semicarbazide have been prepared by the action of potassium cyanate on hydrazine sulfate 1 by the action of hydrazine hydrate on urea 2 by heating hydrazine ammonium carbonate 3 bv the reduction of nitrourea with zinc dust and hydrover. 27, 31 (1894). 

Ammonium carbonate, (NH4)2C03 Potassium iodide, KI Potassium iodate, KI03 Calcium turnings, Ca Iron filings, Fe Mossy zinc, Zn Lead shot, Pb... 

Write the formula for each of the following compounds (a) aluminum hydride, (b) calcium chloride, (c) lithium oxide, (d) silver nitrate, (e) iron(II) sulfite, (f) aluminum chloride, (g) ammonium carbonate, (h) zinc sulfate, (/) iron(in) oxide, (/) sodium phosphate, k) iron(ni) acetate, (/) ammonium chloride, and (m) copper(I) cyanide. 

Carnotite may be fused Avith potassium hydrogen sulphate and the residue extracted with Avater. From the solution the double sulphates of potassium AAuth uranium and vanadium may be obtained by crystallisation. These are reduced by means of zinc and sulphuric acid, and the vanadium precipitated from the solution by means of ammonia and ammonium carbonate. Ammonium diuranate separates from the filtrate on boiling. ... 

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