Reference

Chemical composition for the detection of water and probe containing it

Chemical composition for the detection of water and probe containing it. Melpolder, Frank W.; Victor, James G. (Atlantic Richfield Co., USA). Eur. Pat. Appl. EP 130675 A2 9 Jan 1985, 22 pp. DESIGNATED STATES: R: BE, DE, FR, GB, IT, NL. (English). (European Patent Organization). CODEN: EPXXDW. CLASS: ICM: G01N031-22. ICS: G01F023-04. APPLICATION: EP 84-302965 2 May 1984. PRIORITY: US 83-490744 2 May 1983; US 83-507856 27 Jun 1983. DOCUMENT TYPE: Patent CA Section: 51 (Fossil Fuels, Derivatives, and Related Products) Section cross-reference(s): 79 A visual indicating paste compn. is described for producing a detectable color change upon contact with an aq. soln. The paste contains an indicator dye capable of changing color at pH 7-11, an inorg. base, in the form of a caustic powder, which can be dispersed in a liq. capable of absorbing water but which is not rapidly leached by water or hydrocarbon, and preferably a minor amt. of a B-contg. compd. When applied to a measuring probe, the paste compn. is particularly adapted for detecting the water level in the bottom of tanks and delivery systems contg. gasoline and esp. gasoline contg. oxygenated blending components, by producing a clear detectable color change without bleeding or runoff upon contact with an aq. soln. Thus, a paste contg. phenolphthalein [77-09-8] 7.3, CaO 20.0, tripropylene glycol [24800-44-0] (contg. 1 wt.% tripropyl borate [688-71-1]) 65.9, and fumed SiO2 6.8 wt.% was used to coat a gasoline tank gauge. The gauge was lowered to the bottom of a tank (which contained unleaded gasoline blended with Oxinol 50) for 10 s and then withdrawn; the red color at the end of the probe showed the depth of the water-alc. layer.

Alkyl borates as propylene polymerization catalyst modifiers

Alkyl borates as propylene polymerization catalyst modifiers. Karayannis, Nicholas M.; Lee, Sam S. (Amoco Chem. Corp., Naperville, IL 60566, USA). Makromol. Chem., Rapid Commun., 6(1), 43-7 (English) 1985. CODEN: MCRCD4. ISSN: 0173-2803. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) B(OMe)3 [121-43-7], B(OEt)3 [150-46-9], B(OPr)3 [688-71-1], and B(OBu)3 [688-74-4] incresed catalyst activity by 30-40% and stereospecificity by 30-40% at relatively low levels (B-Ti 0.) when used with Et2AlCl [96-10-6] in the polymn. of C3H6. The further addn. of (Bu3Sn)2S [4808-30-4] further improved activity (by 35%) and stereospecificity. Stereospecificity improvement in the order B(OMe)3 < B(OEt3) < B(OPr)3 < B(OBu)3 indicates steric hindrance at the active polymn. site, owing to formation of Al(OR), and possibly Ti(OR), groups.