4,595,704 discloses that known methods for producing partially neutralized ion-exchange resins employ azirine compounds which are somewhat hazardous. 4,584,416 discloses partial neutralization of a sulfonated ion exchange resin by means of an N-alkylamino alkylmercaptan hydrochloride or hydrotosylate salt. 3,760,006 teaches that the modification of a strong-acid cation exchange resin in acid form by partial neutralization with a thiazolidine yields an improved catalyst for the preparation of bisphenol. 5,212,206 discloses a strong acid cation-exchange resin which is neutralized with a mercaptoamine in an anhydrous medium. Strong-acid cation exchange resins and their use in the production of bisphenols are generally known in the art. The present invention relates to strong-acid cation exchange resins and to a process for producing such resins. A process for isomerizing by-products resulting from the production of a bisphenol by reaction of a phenolic compound with a carbonyl compound wherein the by-products are contacted with a strong-acid cation exchange resin of claim 1 or with a strong-acid cation exchange resin produced according to the process of claim 9. A process for producing a bisphenol wherein a phenolic compound is reacted with a carbonyl compound in the presence of a strong-acid cation exchange resin of claim 1 or in the presence of a strong-acid cation exchange resin produced according to the process of claim 9.ġ4. The process of claim 9 for producing a strong-acid cation exchange resin of claim 1.ġ3. The process of claim 9 wherein R 5 is -C(O)-R 7.ġ2. The process of claim 9 wherein R 4 is (X z−) 1/z(R 1) 3N +-.ġ1. A process for partially neutralizing a strong-acid cation exchange resin comprising contacting a strong-acid ion exchange resin in acid form with a compound of formula II wherein R 2 at each occurrence independently is hydrogen, alkyl or aryl, R 3 at each occurrence independently is hydrogen or alkyl or two vicinal groups R 3 together form an aromatic ring, R 4 is R 6-C(O)-NH- or (X z−) 1/z(R 1) p(R 8) 3-pN +-R 5 is hydrogen or -C(O)-R 7, R 1 at each occurrence independently is hydrogen or a C 1-4-alkyl group, R 6 and R 7 each independently are a C 1-4-alkyl group, R 8 is a group of formula III X z− is an anion, m is 1, 2, 3, 4, 5 or 6, n is 1, 2, 3 or 4, o is 1 or 2, p is 1, 2 or 3, and z is 1, 2, 3 or 4.ġ0.
The strong-acid cation exchange resin of claim 1 wherein p is 2 or 3.ĩ. The strong-acid cation exchange resin of claim 1 wherein R 3 in each occurrence is hydrogen.Ĩ. The strong-acid cation exchange resin of claim 1 wherein R 2 in each occurrence is hydrogen.ħ. The strong-acid cation exchange resin of claim 1 wherein m is 2.Ħ. The strong-acid cation exchange resin of claim 1 wherein n is 1.ĥ. The strong-acid cation exchange resin of claim 1 wherein each group R 1 is methyl.Ĥ. The strong-acid cation exchange resin of claim 1 wherein o is 1.ģ. A strong-acid cation exchange resin comprising a plurality of acid groups being partially neutralized with a cation of formula I wherein R 1 at each occurrence independently is hydrogen or a C 1-4-alkyl group, R 2 at each occurrence independently is hydrogen, alkyl or aryl, R 3 at each occurrence independently is hydrogen or alkyl or two vicinal groups R 3 together form an aromatic ring, m is 1, 2, 3, 4, 5 or 6, n is 1, 2, 3 or 4, o is 1 or 2, and p is 1, 2 or 3.Ģ. RUBBER COMPOSITION FOR SHOE SOLE AND RUBBER FOAM COMPOSITIONġ. Wood-Plastic Composites Using Recycled Carpet Waste and Systems and Methods of Manufacturingįlexible polyurethane foams inhibited from yellowing and pad METHOD FOR PRODUCING CROSS-LINKED ELASTOMERĮxpanded styrene polymers having a reduced thermal conductivity Process for producing rigid polyurethane foams and finished articles obtained therefrom SYSTEM FOR RECYCLING A USED PLASTIC, METHOD FOR REPROCESSING A USED ABS RESIN, AND RECLAIMED ABS RESIN SUSPENSION HOMOPOLYMERIZATION OF AN ISOCYANURATES Filtering Systems and Methods Characterized by Reduced Color Throw
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