Reference

Mechanism of sulfation by atmospheric sulfur dioxide of the limestone and marble of ancient monuments and statues

Mechanism of sulfation by atmospheric sulfur dioxide of the limestone and marble of ancient monuments and statues. III. Further proofs of the validity of the galvanic cell model. Skoulikidis, T.; Charalambous, D.; Papakonstantinou-Ziotis, P. (Lab. Phys. Chem. Appl. Electrochem., Natl. Tech. Univ. Athens, Athens, Greece). Br. Corros. J., 18(4), 200-2 (English) 1983. CODEN: BCRJA3. ISSN: 0007-0599. DOCUMENT TYPE: Journal CA Section: 20 (History, Education, and Documentation) Measurements of the rate of sulfation were made of powd. pentelic marble at high temps. 7664-93-9 and 7446-09-5 which are cas registry numbers of chemicals are mentioned. (wt. gain), of polymer-coated marble at ambient temp. (EPMA), of untreated and polymer-coated marble at ambient temp. (wt. gain), and of the rate of attack of H2SO4 (wt. loss) on untreated and polymer-coated marble at ambient temp. The results provide supplementary evidence for the validity of the model of a galvanic cell for the sulfation of marble and its mechanism as presented in previous work, and of the danger of using protective org. films which accelerate the sulfation. .

Aqueous formaldehyde solutions

Aqueous formaldehyde solutions. Davis, Martin Thomas (Imperial Chemical Industries PLC, UK). Brit. UK Pat. Appl. GB 2120924 A1 14 Dec 1983, 7 pp. (English). (United Kingdom). CODEN: BAXXDU.Chemicals with cas numbers 9003-05-8 and 7664-93-9 also play role. CLASS: IC: A23K003-02. APPLICATION: GB 83-13257 13 May 1983. PRIORITY: GB 82-15860 1 Jun 1982. DOCUMENT TYPE: Patent CA Section: 17 (Food and Feed Chemistry) A silage preservative comprises an aq. soln. of H2CO [50-00-0] (5-40%), 0.05-2.5% (by wt. of H2CO) polyacrylamide [9003-05-8] or methyl vinyl ether-maleic anhydride copolymer (I) [9011-16-9] as vapor release suppressants, and, optionally, a mineral acid (1-9 vol. H2CO:1 vol 5M acid). Thus, to an aq. preservative soln. contg. 50% by wt. of 37% H2CO and 20% by wt. H2SO4 (expressed as 100% acid), I (1.7% by wt. of H2CO) was added and the compn. was used to treat fresh grass at 5 mL/kg. At 15 min after treatment, before any protein binding occurred, grass samples treated with preservative soln. contg. I retained 1650 ppm H2CO compared with 1260 ppm H2CO for grass treated with H2CO soln. but not. contg I. .