6 results about "Acid stable" patented technology

The present invention relates to an improved catalyst on the basis of a shaped catalyst body for hydrogenating carbonyl groups in organic compounds under the effect of acids and water, characterized in that the shaped catalyst body contains copper in an amount of 17.5 to 34.5 wt. %, relative to the shaped catalyst body and the copper is present in the shaped catalyst body to at least 70% in the form of a copper spinel CuAl2O4. The invention also relates to the production of the catalyst an to the use of same in the hydrogenation of carbonyl groups in organic compounds in the presence of acids and / or water.

An elution buffer for eluting one or more predetermined analytes from one or more analyte-specific antibodies or fragments thereof or for eluting one or more predetermined antibodies or fragments from a target antigen, wherein the elution buffer has a pH of 1 to 5; and the elution buffer comprises a predetermined amount of an acid-stable mass spectrum ionization control protein. Use of an elution buffer in the detection and quantification of an analyte (e.g., by mass spectrometry) is also described.

An oligomeric di(monophosphate) acid stabilizer conforming to the structure of formula (II) wherein n is n > 3. And a method for producing the acid stabilizer and a polyurethane prepolymer containing the acid stabilizer.

The invention discloses a diglycol amide compound with a tripod structure as well as a synthesis method and application thereof, and relates to the field of amide compounds, and the chemical name of the diglycol amide compound is 2, 2 ', 2' '-(((((nitroso tris (methylene)) tris (benzene-2, 1-diyl)) tris (nitrogen diyl)) tris (2-oxoethane-2, 1-diyl)) tris (oxy)) tris (N, N-dioctyl acetamide). The compound is constructed by taking tris (2-aminobenzyl) amine as a core skeleton and grafting three N, N, N ', N'-tetraoctyl diglycol amide chelating units. The Trapan-DGA compound disclosed by the invention shows excellent performance in the field of nuclide separation: in a 5.0 M nitric acid medium, the distribution ratio to Th (IV) reaches 12.4, and the separation factor to Th (IV) / U (VI) reaches up to 34.4. The compound has excellent acid stability, the extraction performance is stable in the nitric acid concentration range of 1.0-5.0 M, and the extraction equilibrium time is only 5 minutes. Meanwhile, the compound has good solubility in non-polar diluent kerosene, and effective extraction can be realized without adding an alcohol modifier.

The present invention relates to an improved chromium-free Cu-Al catalyst for the hydrogenation of carbonyl groups in organic compounds, characterized in that the catalyst contains a proportion of zirconium in an amount of 0.5% to 30.0% by weight. The present invention additionally also relates to the preparation of the catalyst and to the use thereof in the hydrogenation of carbonyl groups in organic compounds.

Provided are certain membranes useful in the filtration of liquids and removal of various contaminants therein. In certain aspects the membranes have as one component a polyamide such as Nylon 11 and / or Nylon 12. Also provided is methodology for manufacturing such membranes and their use in filtration and purification of liquids. Membranes of the disclosure thus prepared exhibit superior acid stability when compared to polyamide membranes prepared from Nylon 6 or Nylon 6,6.