Abstract: A dilute solution of methyl ethyl ketone is concentrated by pervaporation through a fluorinated ion exchange membrane which has been exchanged with a quaternary ammonium cation.

Abstract: A coated cation exchanged fabric having as its base a fluorinated cation exchange resin, oriented at least 1x, in alkali metal salt form and as its coating an unoriented or oriented melt-fabricable precursor of the same salt-form fluorinated cation exchange resin. The invention also includes various processes for making the coated fabric.

Abstract: A fluorinated cation exchange membrane made using reinforcement of oriented, hydrolyzed fabric of a cation exchange copolymer, the fabric having a coating of a melt-processible precursor or derivative of a fluorinated cation exchange resin on at least one surface or throughout.

Abstract: A sheath/core yarn having as its core a fluorinated cation exchange resin, oriented at least 1x, in alkali metal salt form and as its sheath an unoriented or oriented melt-fabricable precursor or derivative of the same salt-form fluorinated cation exchange resin. The invention also includes various processes for making the sheath/core yarn.

Abstract: A process is provided for removing rhodium-containing catalyst residue from a solution of hydrogenated nitrile rubber. The process utilizes an ion exchange resin which must be both macroreticular and modified with a selected amine, thiol, carbodithioate, thiourea and/or dithiocarbamate functional group. The process is capable of removing rhodium from viscous rubber solutions containing less than 10 ppm rhodium. In a preferred embodiment, the process is undertaken in an ion-exchange column.

Abstract: An absorber is capable of selective adsorption and removal of acidic gases of sulfur oxides, nitrogen oxides, chlorine compounds and sulfur-containing compounds such as hydrogen sulfide, as well as organic acid gases. The absorber is characterized by having a metal phthalocyanine supported on an ion exchanger, wherein the ion exchanger has a quarternary ammonium group as an ion-exchange group and the metal phthalocyanine contains iron phthalocyanine in an amount of 0.05-30 wt % of the ion exchanger.

Abstract: Cation exchange resins with improved stability prepared by treating the resins with an antioxidant are disclosed.

Abstract: A precipitation polymerization process for the production of a macroporous cross-linked copolymer in which there is added to a reactor equipped with a stirrer, at least one monounsaturated monomer and at least one polyunsaturated monomer, dissolving an inorganic polymerization reaction initiator in a homogeneous minimum-boiling binary azeotrope including a solvent and water, and conducting the polymerization in the azeotrope.

Abstract: The invention relates to a process for preparing anion exchangers based on crosslinked, water-insoluble organic polymers containing aromatic nuclei, in which, in the first step, N-hydroxymethylphthalimide is produced by reaction of phthalimide with aqueous formaldehyde solution in swelling agents in the presence of bases; if desired, this N-hydroxymethylphthalimide is converted in a 2nd step to the bis)phthalimidomethyl)ether or an ester of N-hydroxymethylphthalimide; said polymers are aminomethylated wtih N-hydroxy-methylphthalimide, bis)phthalimidomethyl) ether or an ester of N-hydroxymethylphthalimide in the presence of Friedel-Craft catalysts and swelling agents and the amidomethylated polymers are finally saponified to form the aminomethylated polymers, wherein, in the first reaction step, the base used for producing N-hy-droxymethylphthalimide is sodium hydroxide solution and this sodium hydroxide solution is added in such an amount and at such a rate that the reaction of phthalimide with formaldehyde t

Abstract: The invention concerns a method for conditioning in a thermosetting resin a quantity of waste stored in water.According to the invention, a liquid hardening agent, immiscible with water and having a density greater than that of the water, is used in order to harden the resin; this hardening agent is then mixed with the waste stored in the water and then the waste is left to decant in the hardening agent; then the water present above the decanted waste transferred into the liquid hardening agent is extracted and the waste transferred into the liquid hardening agent is mixed with the epoxy resin so as to obtain a solid block.In particular, the waste may be ion exchanger resins. Adding of the hardening agent to the waste stored in the water makes it possible to limit a temperature rise during hardining and to obtain solid products having an improved density.

Abstract: This invention relates to an ionic exchanger modified with thiazolines, to its preparation and to its use for the preparation of condensation products, particularly bisphenols.

Abstract: A novel process is provided in which a membrane of a fluorinated resin having pendant ion exchange precursor groups represented by at least one formula selected from the group consisting of:--SO.sub.2 X and --CYwherein X represents a halogen atom or --OR in which R represents an alkyl group having 1 to 4 carbon atoms, and Y represents a nitrogen atom or --OX in which X is as defined above, is contacted with an aqueous solution of a basic organic compound for a period of time sufficient to perform the hydrolysis of the precursor groups. In the process of the present invention, a complicated pre-swelling step as conventionally conducted in the art is advantageously omitted. Nevertheless, an ion exchange membrane having excellent dimensional stability and performance stability can be obtained. In addition, when the obtained membrane is used in an electrolytic cell, the cell exhibits an extremely low cell voltage.

Abstract: A process for preparing an anion exchange membrane, which comprises subjecting a carboxylate membrane made of a copolymer having repeating units of the formula: ##STR1## wherein X is F or CF.sub.3, l is an integer of from 0 to 5, m is 0 or 1, n is an integer of from 1 to 5, and p/q is from 4 to 16, and R is an alkyl group, to an acid or base treatment, and then introducing anion exchange groups thereinto.

Abstract: Improved processes for the removal from solution of multi-valent alkaline earth metal and/or heavy metal cations are taught, having excellent combinations of cation capacity and resistance to bead breakage. The processes use specified polymer resin beads functionalized with chelating functionalities such as alkylaminophosphonic moieties or iminodiacetic acid moieties. The beads are prepared by the specified process to have a decreased amount of cross-linking in the shell area as compared to the core. An additional aspect of the invention is an improved gel-type chelating resin having core/shell morphology and alkylaminophosphonic functional groups which is found to exhibit surprising combinations of dynamic capacity, osmotic shock resistance, and physical strength. This chelating resin has been found to be very suitable for the removal of calcium from brine solutions prior to the use of such solutions in membrane electrolysis cells of chlorine production.

Abstract: The present invention provides an oil-containing resin having a flowability of not more than 45.degree. in terms of an angle of repose, which comprises a porous styrene-divinylbenzene copolymer and a liquid oil adsorbed on the copolymer, an oil-containing resin mixture in a paste form of the oil-containing resin and a liquid oil, and a composition of the oil-containing resin mixture in a paste form and a thermoplastic resin. Owing to a good flowability, the oil-containing resin has a good moldability, and also owing to a high oil content, a molding having distinguished sliding characteristics is obtained from the composition of the oil-containing resin mixture in a paste form and a thermoplastic resin.

Abstract: This invention is directed to the process and apparatus for making a polymeric membrane containing non-quaternized amine groups, with the polymer having substantially zero amounts of non-polymerized solvents. The resulting membrane is a more efficient anion membrane for recovering acid from acidic solutions by electrodialysis than the corresponding membranes containing quaternized amine groups. The membrane is made by polymerizing a monomeric mixture on a reinforcing cloth structure, which monomeric mixture is void of non-polymerizing solvents.

Abstract: Bisphenol-A is prepared by reacting an excess of phenol with acetone in the presence of a modified sulfonic acid cationic exchange resin catalyst having a plurality of sulfonic acid sites of the general formula ##STR1## in which IER represnts the ionic exchange backbone, each a and b is an integer from 9 to about 5, and each R is selected independently from H, OH, Sh and alkyl groups. The catalyst exhibits high activity and selectively at moderate reaction temperatures, low production of colored impurities, and high stability.

Abstract: New macroporous alkylaminophosphonic chelating resins which exhibit excellent mechanical stability and strength and good chemical stability are characterized by having an apparent density of 0.35 to 0.425 g/ml, a granulometry smaller than 0.8 mm, a water retention of 50 to 60 percent in the acid form, a porosity of 800 to 1100 mm.sup.3 g, a total theoretical capacity for the fixation of calcium ions of not greater than 31 g/l of resin in the sodium form and an osmotic resistance such that more than 90 percent of the beads are intact after 30 shocks. The high resistance to osmotic shock combined with an adequate exchange capacity exhibited by the new resins makes them particularly suitable for use in highly concentrated solutions, such as concentrated electrolytic brines.

Abstract: A novel composite membrane and methods of making the membrane are described. The discriminating layer of the membrane is prepared by reaction of a reactive cationic compound group with a compound bearing a nucleophilic moiety. At least one of the reactants bears an average of two or more reactive groups. The reaction product contains covalent bonds formed via charge eliminating reactions.In a preferred embodiment of the invention, the nucleophilic group is anionic and a coacervate is formed initially on a microporous substrate. The resulting membrane may be useful for reverse osmosis, gas or ultrafiltration separations.

Abstract: Copolymers of acrylonitrile with aliphatic cross-linkers having two or more unconjugated vinylic groups are functionalized with polyamines to form weakly basic anion exchange resins having both low rinse-volume requirements and high anion exchange capacity.

Abstract: A method of preparing low chloride strong-base anion exchange resin is disclosed. The method involves a two-step amination of the haloalkylated copolymer beads at temperatures below 60.degree. C.

Abstract: Basic polymers useful as weak base catalyst support for rhodium in a one-step hydroformylation/reduction of an olefin to an alcohol are prepared by reacting chloromethylated polystyrene resin with an alkoxide of an alkanolamine in a nonaqueous solution. The reaction product has repeating units of the formula: ##STR1## wherein R is an aliphatic tertiary amine and n is the number of repeating units in the polymeric structure.

Abstract: A metal scavenger is composed of an addition product of a polyamine and an epihalohydrin. The addition product contains as substituent or substituents at least one carbodithio group and/or at least one carbodithioate salt group introduced therein by substituting the corresponding number of active hydrogen atom or atoms in the addition product. Metals can be scavenged from waste water by adding the metal scavenger together with at least one of sodium monosulfide, sodium polysulfides and sodium hydrogensulfide.

Abstract: A fluorocarbon anion exchanger which is composed of a fluorocarbon polymer comprising a perfluorocarbon main chain and a pendant chain attached to the main chain, characterized in that the pendant chainhas a terminal group represented by the formula: ##STR1##

Abstract: Process for the conditioning of waste, such as radioactive or toxic waste, whose acidity can inhibit polymerization reactions, e.g. waste containing cation exchange materials.This process consists of incorporating the waste into a liquid epoxy resin at ambient temperature and then bringing about the polymerization of the resin by means of a hardener, in order to obtain a solid block.A hardener containing at least one compound having at least one NH.sub.2 group in an adequate quantity for blocking the active sites of the cation exchange materials present in the waste or for neutralizing the acidity of the humid waste and for polymerizing the epoxy resin is used.This process can be more particularly used for conditioning resin beds used for the purification of the water of nuclear power stations.

Abstract: Partially neutralize a strong-acid cation-exchange resin in acid form using an N-(2-mercaptoalkyl)amide in the presence of water.

Abstract: Polybromide resin beads for disinfecting potable water are stabilized as to bromide content by:(A) initially charging excess bromine into an aqueous slurry of quaternary ammonium amine exchange resin beads;(B) removing external moisture to provide moist sticky beads;(C) passing gaseous drying agent at controlled temperature and velocity effective to gradually remove internal moisture and excess bromine; and(D) continuing the gradual drying until dry, free-flowing beads having less than 5% water and 17 to 47% bromine are obtained.

Abstract: A sulfonated aromatic organic polymer, such as sulfonated polystyrene ion-exchange resin is provided having ionically bound N-alkylaminoorganomercaptan groups. The ion-exchange resin can be used to effect phenol-ketone condensation.

Abstract: A fluorocarbon polymer comprising a perfluorocarbon main chain and a pendant chain attached to the main chain, characterized in that the pendant chain has a quaternary ammonium type terminal group.

Abstract: A resinate of the formula ##STR1## wherein Am.sup..sym. is a strongly basic copolymer of styrene and divinylbenzene which is in cationic form, said copolymer containing the sum of m+n quaternary ammonium groups and also containing, as main structural unit, the grouping of the formula ##STR2## X.sup..crclbar. is the anion of an acid different from the anion of the formula ##STR3## and m and n denote the entire ion capacity of the copolymer, and the molecular weight of which is about 10.sup.7 to 10.sup.9, a process for the preparation of said resinate, the use thereof as active ingredient of a drug, and pharmaceutical compositions containing it.

Abstract: A process for preparing anion exchange resin having macroreticular structure by suspension copolymerizing a polyvinylidene crosslinking monomer and a monoethylenically unsaturated aliphatic ester of acrylic acid in the presence of a liquid which is substantially immiscible with the aqueous phase of the suspension polymerization medium, which is a solvent for the monomers, and which does not substantially swell the resulting copolymer; the resulting macroreticular copolymer is isolated and aminolyzed to form an anion exchanger.

Abstract: Bisphenols are prepared by condensation of a phenol with a ketone in the presence of a sulfonic acid type cation exchange resin partially modified with a pyridinealkanethiol of the formula:Py--(CH.sub.2).sub.n SHwherein n is a positive integer and Py is 3-pyridyl when n is 1, or 2-, 3- or 4-pyridyl when n is more than 1.

Abstract: A method is provided for making sulfonated aromatic organic polymers having aminoorganomercaptan groups attached to backbone sulfonyl radicals by covalent nitrogen-sulfur linkages. These sulfonated aromatic organic polymers can be used as an ion-exchange resin for making bisphenols.

Abstract: A process for removing SO.sub.x pollutants from a stack gas by (1) absorbing the SO.sub.x pollutants into an aqueous absorbent containing a formate compound and (2) regenerating the spent absorbent containing dissolved SO.sub.x compounds by contact, in the presence of added formate anion, with a water-insoluble, solid substance containing one or more tertiary amine functional groups. Nitrogen monoxide is removed by providing in the aqueous absorbant an iron(II) chelate, such as a chelate of ferrous ion with ethylenediaminetetraacetic acid. Regeneration of the spent absorbent containing absorbed NO is accomplished under the same conditions as for spent absorbents containing absorbed SO.sub.x compounds. SO.sub.x and NO pollutants dissolved in the absorbent are, during regeneration, converted to hydrogen sulfide and nitrogen, respectively.

Abstract: An aminophosphonic acid chelate resin, prepared by reacting an amino resin having amine-reactive groups (A) with an amino compound having one or more primary and/or secondary amino groups (B) to produce an aminated resin and subsequently reacting thus produced aminated resin with an alkylphosphonation agent (C), shows excellent adsorption ability of metal ions having low atomic weights such as calcium ions, magnesium ions, etc., when applied to a solution having high salt concentration.

Abstract: The invention relates to new reticulated statistic acrylic copolymers that may be used in a very wide range of solvents (water, methylene chloride, chloroform, methanol, ethanol, dimethylformamide, pyridine,) stable between pH 1 and pH 14, to preparation process thereof and to their use in ion exchange chromatography.

Abstract: The present invention relates to new amino-functionalized acrylic copolymers, their preparation and their use in peptide synthesis.

Abstract: Hard, infusible, discrete beads of crosslinked copolymer are prepared by free-radical catalyzed polymerization of a monomer mixture in aqueous dispersion wherein a minor amount of a modifier, specifically an organic compound containing acetylenic or allylic unsaturation having the ability to moderate the rate of polymerization, is incorporated in the monomer mixture. Ion exchange resins having improved mechanical strength are obtained by attaching functional groups to the copolymer.

Abstract: Linear addition polymer beads having repeating units of vinylbenzyl alcohol and at least one other structure different from vinylbenzyl alcohol, wherein the vinylbenzyl alcohol units comprise at least 0.5% by weight of the linear polymer, and thermally crosslinked derivatives thereof. The beads are thermally crosslinked by heating during formation thereof or thereafter in the presence of a free radical initiator, such that benzylic methylene or benzyloxy crosslinks are formed between aromatic rings of the vinylbenzyl alcohol units, and between the vinylbenzyl alcohol units and other active sites in the polymer. The linear addition polymers may be formed directly from vinylbenzyl alcohol monomer and at least one other monomer, or indirectly by hydrolysis of vinylbenzyl chloride during linear polymer formation therefrom. The crosslinked products are useful as adsorbents, hydrogels and as intermediates in the preparation of other adsorbents, ion exchange resins, catalysts and slow release agents.

Abstract: A sulfonated organic polymer, such as a sulfonated polystyrene ion-exchange resin is provided having organic mercaptan groups attached to backbone sulfone radicals by covalent nitrogen-sulfur linkages. A method for making such sulfonated organic polymer is also provided. The ion-exchange resin can be used to effect phenol-ketone condensation in the synthesis of bisphenols.

Abstract: Metal ion adsorbent that is formed by an organic polymer having a hydrophilic character through a content of an average of at least 0.5 substituents per monomer unit of any of the following types: OH, O, CO, NH.sub.2, NH or N, so that the concentration of these groups is at least 25 mol-percent. The polymer in a non-aqueous state contains at least 10 .mu.mol of metal binding groups per gram of adsorbent. The metal binding group has 5 coordinating ligand atoms, two of which are nitrogen atoms and three of which are carboxylic acid groups.

Abstract: A shaped composite adsorbent made of a shaped porous material of a skin-core structure comprising a powdery ion-exchange type adsorbent and an ionic group-containing acrylonitrile polymer and wherein said shaped porous material has a semi-permeable skin layer of 0.01 to 1.mu. in thickness and a void volume rate of 50 to 90%, which is capable of adsorbing solutes present at low concentration with high selectivity and high yield. The shaped composite adsorbent of the present invention can be obtained by a process comprising dissolving an ionic group-containing acrylonitrile polymer in and dispersing a powdery ion exchange type adsorbent in an inorganic solvent for said acrylonitrile polymer, extruding the resultant into a coagulating liquid bath to effect coagulation-shaping thereof.

Abstract: A sulfonated aromatic organic polymer, such as sulfonated polystyrene ion-exchange resin, is provided having N-alkylaminoorgano mercaptan groups attached to backbone sulfonyl radicals by covalent nitrogen-sulfur linkages. The ion-exchange resin can be used to effect phenol-ketone condensation in the synthesis of bisphenols.

Abstract: A process for preparing reticular crosslinked copolymer beads by suspension copolymerization in an aqueous medium a polyvinylidene monomer and a monovinyl aromatic hydrocarbon monomer in a liquid precipitant which has a low solubility in the aqueous medium, is a solvent for the monomer mixture and does not appreciably swell the copolymer, the liquid precipitant and said polyvinylidene monomer each being present in an amount exceeding the critical concentration of each needed for phase separation of the copolymer from the monomer phase, and the products produced by said process.

Abstract: Emulsion copolymer particles with diameters smaller than 1.5 micrometers and functionalized with cation exchange functional groups are prepared and suspended as emulsions in liquid media to form liquid cation exchange materials.

Abstract: Hard, infusible, discrete beads of crosslinked copolymer are prepared by free-radical catalyzed polymerization of a monomer mixture in aqueous dispersion wherein a minor amount of a modifier, specifically an organic compound containing acetylenic or allylic unsaturation having the ability to moderate the rate of polymerization, is incorporated in the monomer mixture. Ion exchange resins having improved mechanical strength are obtained by attaching functional groups to the copolymer.

Abstract: The present invention relates to novel compounds for the prophylaxis and treatment of Inflammatory Bowel disease (IBD) via the administration of an effective amount in a suitable pharmaceutical dosage of a polymeric agent for releasing 5,5'-azobis-salicylic acid which comprises a non-degradable anionic exchange resin and the dianionic form of 5,5'-azobis-salicylic acid. The 5,5'-azobis-salicylic acid undergoes bacterial cleavage in the mammalian lower bowel to release 5-aminosalicylic acid.

Abstract: The reaction of vinylbenzyl chloride and N, N, N', N', 2-pentamethyl-1,2-propanediamine (PMPDA) produces a high capacity, base stable, crosslinked, anion exchange polymer useful especially when manufactured in sheet or membrane form for use in electrodialysis apparatus.

Abstract: A porous open-cell filled reactive material containing a polymeric matrix of foamed polyvinylformal or foamed polyurethane and a finely-divided oxidation-reduction reactive fiber as a filler in an amount of from 10 to 80% by mass of the final material. The oxidation-reduction properties of the fibers are ensured through the use of oxidation-reduction agents which are covalently bonded with the fiber. As the oxidation-reduction agents use is made of the following compounds: polyhydric phenols, anthraquinones, naphthoquinones, phenothiazine dyestuffs. The oxidation-reduction fibers also comprise metal-containing fibers based on polyvinyl alcohol, cellulose-regenerated fibers, acetate cellulose or polyacrylic polymers.

Abstract: Ion exchange resins of the acid type at least partially salified with 7-bromo-6-chloro-febrifugin having very good coccidiostatic activity, a very good anti-leucocytozoonosis activity and a low toxicity and their preparation.