Detail of "7045-83-2"

CAS Number:
7045-83-2
Name:
2-Naphthalenesulfonicacid, 1,4-dihydro-1,4-dioxo-, sodium salt (1:1)
Molecular Structure:
Formula:
C10H6 O5 S . Na
Molecular Weight:
0
Synonyms:
2-Naphthalenesulfonicacid, 1,4-dihydro-1,4-dioxo-, sodium salt (6CI,7CI,8CI,9CI); 1,4-Naphthoquinone-2-sulfonicacid sodium salt; Sodium 1,4-naphthoquinone-2-sulfonate

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Recovery of alkali and catalyst from waste alkali solutions: Recovery of alkali and catalyst from waste alkali solutions. Hasegawa, Masuo; Kamijo, Yasuhiko (Tsukishima Kikai Co., Ltd., Japan). Japan. Kokai JP 49130894 14 Dec 1974 Showa, 7 pp. (Japanese). (Japan). CODEN: JKXXAF. NCL: 15A9. APPLICATION: JP 73-46402 24 Apr 1973. DOCUMENT TYPE: Patent CA Section: 60 (Sewage and Wastes) Waste alkali solns. contg. org. catalyst and alkali compds., from the desulfurization of H2S-contg. gases by absorbing H2S and catalytically converting it to S, are concd. by evapn. to crystallize alkali compds., and from the resulting solns. the org. catalyst is recovered. The crystd. alkali compds. are thermally decompd. to recover various alkalies. Thus, a waste alkali soln. contg. Na2S2O3 28.6, Na2SO4 11.7, NaHCO3 1.98, Na2CO3 2.87, and 1,4-naphthoquinone-2-sulfonic acid Na salt (I) [7045-83-2] 0.164%, from the desulfurization of H2S-contg. gases, was concd. by evapn. at 60° to give a concd. soln. contg. Na2S2O3 48.2, Na2SO4 9.36, NaHCO3 0.265, Na2CO3 0.454, and I 1.15%. I was recovered from the concd. soln. The crystd. mass contained Na2S2O3 60.6, Na2SO4 28.0, NaHCO3, 5.25, Na2CO3 6.20%, but no I.

Improvement of the Takahax process for wet desulfurization: Improvement of the Takahax process for wet desulfurization. Tsuru, Yoshimichi (Tokyo Gas Co., Ltd., Tokyo, Japan). Nippon Gasu Kyokaishi, 29(8), 28-35 (Japanese) 1976. CODEN: NIPGAM. DOCUMENT TYPE: Journal CA Section: 59 (Air Pollution and Industrial Hygiene) Section cross-reference(s): 67 This method has been used in 88 plants over the last 10 years. The catalyst currently in use is Na 1,4-naphthoquinone-2-sulfonate [7045-83-2], and a new catalyst, ammonium 1,4-naphthoquinone-2-sulfonate [56633-19-3] is being developed. H2S is oxidized to S. He NH4+ catalyst appears to be more efficient than the Na catalyst in a batch absorption test. A batch regeneration, in an air bubble tower, of the NH4+ catalyst was faster than that of the Na catalyst.