Abstract:
An electrochromic element (10) useful in an electrochromic glass or mirror device and a process for making such element. The element is a five-layered structure including an electrolyte ion conducting layer (20) interposed between first and second inorganic electrochromic layers (16, 18) which are interposed between a pair of conductive electrodes (12, 14). The second inorganic electrochromic layer (18) is amorphous. The first and second inorganic electrochromic layers are different and are capable of exhibiting color-forming properties complementary to one another upon the incorporation of at least one H, Li, Na, K, Ag, Cu or Tl ion. The electrolyte ion conducting layer may be a copolymer of ethylene oxide, butylene oxide or methyl glycidyl ether, and optionally a small amount of allyl glycidyl ether, along with an ionizable salt, or may be a polyurethane gel formed by reacting the copolymer with triisocyanate, along with an ionizable salt. The second inorganic electrochromic layer comprises a transition element chalconide or halide. The electrochromic element may also comprise a plurality of five-layer structures in tandem, each pair separated by a substrate.
Abstract:
Process for synthesizing 1,1,1-trifluoroethane (143a) in the gaseous phase by reacting 1,1-defluoro-1-chloroethane in gaseous phase in the presence of a Cr catalyst. The process may be run isothermally or adiabatically, without co-feeding air or other oxygen containing gas, in the presence or absence of a Ni, Co, Zn or Mn cocatalyst for the Cr catalyst. The catalyst may be unsupported or supported with a support preferably selected from activated carbon, alumina and fluorided alumina. The formation of olefin byproduct can be kept to less than 10 ppm in accordance with the process of the invention.
Abstract:
Process for synthesizing 1,1,1-trifluoroethane (143a) in the gaseous phase by reacting 1,1-difluoro-1-chloroethane in gaseous phase in the presence of a catalyst selected from the SbV, TiIV,and SnIV salts. The process may be run without co-feeding chlorine gas as a coactivator, in the presence or absence of an impurity selected from HCl and 141b. The catalyst may be unsupported or supported on activated carbon. The formation of olefin byproduct was not detected when the process of the invention was conducted under the conditions described.
Abstract:
A process is disclosed for the manufacture of precious metal salts by the direct reaction of a precious metal and an oxidizing agent in the presence of a nonoxidizing acid.
Abstract:
This invention relates to a process for the removal of sulfur dioxide from a stream of gases comprising contacting said stream with a sulfur dioxide absorbing amount of a liquid absorbent comprising:
a) a non-cyclic sulfone of the formula
R-SO₂-R',
or b) a non-cyclic sulfonamide of the formula where, in the formulas a) or b), R,R'R'' and R''' are primary, secondary or tertiary alkyl, or alkaryl groups wherein the alkyl moieties have from 1 to 20 carbons and R'' and R''' may also be hydrogen, water being substantially insoluble with the sulfone of a) and the sulfonamide of b), and separating the rich sulfur dioxide enriched liquid absorbent from said stream.
Abstract:
A process for coproducing alkanesulfonyl chloride (ASC) or alkanesulfonic acid (ASA) and hydrochloric acid of reduced contamination with ASC, wherein a compound of the formula RSX, where X is hydrogen or -SR¹ and R and R¹ are alkyl radicals having from 1 to 20 carbon atoms, is reacted with chlorine in the presence of aqueous hydrochloride at an elevated pressure.