Specific sequestering agents for the actinides. 3. Polycatecholate ligands derived from 2,3-dihydroxy-5-sulfobenzoyl conjugates of diaza- and tetraazaalkanes
The invention provides macrocycles useful in chelating metal ions, particularly radionuclides, to provide metal ion complexes. The invention also provides methods of using the compounds and complexes of the invention, such as in therapeutic and diagnostic applications.
A membrane is provided that is formed from a composition. The composition comprises a polyarylene ether polymer or copolymer comprising a zwitterion; or comprises a polyarylene polymer or copolymer comprising a zwitterion.
Provided is a composition including a polyarylene ether polymer or copolymer comprising a zwitterionic, group. The zwitterionic group can derive from a zwitterionic precursor such as 4-(2-hydroxyethyl)-1-piperazine ethane sulfonic acid and comprises at least one atom of sulfur, phosphorus, or nitrogen. Embodiments also relate to an article, made from the composition, such as a membrane.
A process is provided that includes attaching a zwitterion to a polymer or a copolymer, wherein the polymer or copolymer comprises a polyarylene ether or a polyarylene.
High pressure high temperature (HPHT) aqueous drilling mud composition and process for preparing the same
申请人:ISP INVESTMENTS INC.
公开号:US10113099B2
公开(公告)日:2018-10-30
What is described herein is an aqueous high-temperature high-pressure (HTHP) stable drilling mud composition comprising (i) about 20 wt. % to about 80 wt. % of 0-60% w/w brine solution; (ii) about 0.1 wt. % to about 3 wt. % of butylated reaction product of p-cresol and dicyclopentadiene, a polymeric hindered phenol based antioxidant; (iii) about 0.1 wt. % to about 10.0 wt. % of triethanol amine, a chelating agent; (iv) (a) about 0.1 wt. % to about 10 wt. % of rheology modifier (RM); and/or (b) about 0.5 wt. % to about 30 wt. % of fluid loss additive (FLA); (v) about 20 wt. % to about 80 wt. % of weighting agent; (vi) about 0 wt. % to about 20 wt. % of drilling solid; and (vii) about 0 wt. % to about 50 wt % of water.