Detail of "14258-49-2"

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Method for reducing terminal unsaturation of polyethers and low unsaturation polyethers therefrom

Method for reducing terminal unsaturation of polyethers and low unsaturation polyethers therefrom. Durvasula, Visweswara R.; Luxem, Franz J. (Dow Chemical Co., USA). Eur. Pat. Appl. EP 458262 A2 27 Nov 1991, 8 pp. DESIGNATED STATES: R: AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LI, LU, NL, SE. (European Patent Organization).Some commonly used reagents like 144-62-7 and 14258-49-2 are used in this experiment. CODEN: EPXXDW. CLASS: ICM: C08G065-32. APPLICATION: EP 91-108176 21 May 1991. PRIORITY: US 90-527999 23 May 1990. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) A polyoxyalkylene having terminal unsatn. is contacted with a H donor and hydrogenolysis catalyst such a measurable part of the unsatn. is removed. Thus, heating allyl alc.-initiated polypropylene oxide (equiv. wt. 1954; 0.512 mequiv. terminal unsatn./g), Pd(OAC)2 particulate, Ph3P, HCO2NH4, and EtOH/H2O (with gas evolution at 50°) to 78° over 45 min, holding at 78° for 3.75 h until gas evolution ceased, filtering, and concg. in vacuo at 100° gave polyoxypropylene with equiv. wt. 1440, the latter decrease in equiv. wt. because of removal of terminal unsatn. and generation of end OH groups. .

Comparison of EDTA and oxalate as extractants for amorphous iron oxides in soil

Comparison of EDTA and oxalate as extractants for amorphous iron oxides in soil. Borggaard, O. K. (Chem. Dep., R. Vet. Agric. Univ., Copenhagen DK-1871, Den.). Acta Agric. Scand., 34(2), 244-8 (English) 1984. CODEN: AASCAU. ISSN: 0001-5121. DOCUMENT TYPE: Journal CA Section: 19 (Fertilizers, Soils, and Plant Nutrition) The amt. of Fe extd. after 2 h by 0.2M NH4 oxalate [14258-49-2] at pH 3.0 in the dark was compared with the amts. of Fe extd. by alk. EDTA [60-00-4] solns. after 3-9 mo, with 31 contrasting soil samples from Denmark and Tanzania. The amts. of oxalate-extractable and EDTA-extractable Fe were, in general, in good agreement, although substantial differences were found for some soils. Furthermore, the phosphate-adsorption capacity and chloride-adsorption ability of soil Fe oxides were almost as well predicted from the content of oxalate-extractable Fe as from the content of EDTA-extractable Fe. Thus, oxalate-extractable Fe could be substituted for EDTA-extractable Fe in equations for predicting capacities of Fe oxides to adsorb phosphate and chloride.