GB1001603A - Separation, purification and recovery processes - Google Patents

Abstract

Proteins, polypeptides and amino acid mixtures may be separated from mixtures of proteins or from protein hydrolysates by contacting the above-mentioned sources in liquid form with a water-insoluble functional derivative of cellulose crystallite aggregates having an average degree of polymerization of between 15 and 375 anhydroglucose units. The functional derivatives may be characterized by carboxylic, carboxylic ester, phosphate ester, sulphate ester, phosphorous ester, boric ester, ureido, aldehyde, hydroxyl, ether, carboxyether, phosphonoalkyl ether, sulphoalkyl ether, sulphinoalkyl ether and alkylaminoalkylether groups, or by groups introduced by treatment with epichlorohydrin and triethanolamine. The functional derivative preferably has ionexchange properties and the source may be treated by pouring it through a column of the derivative and eluting as necessary. Specifications 874,945 and 976,335 are referred to.ALSO:Carboxylic acids are separated from mixtures thereof or from mixtures with solvents and/or impurities by bringing said mixture in liquid form into contact with a water-insoluble functional derivative of cellulose crystallite aggregates having an average level-off degree of polymerization of between 15 and 375 anhydroglucose units. The functional derivatives may be characterized by carboxylic, carboxylic ester, aldehyde, ether, hydroxyl, carboxyether, alkylaminoalkylether, ureido, phosphate ester, sulphate ester, phosphorous ester, boric ester, phosphonoalkyl ether, sulphoalkyl ether and sulphinoalkyl ether groups, or by groups introduced by treatment with epichlorohydrin and triethanolamine. The functional derivative preferably has ion-exchange properties and the mixture may be treated by pouring it through a column of the derivative and eluting as necessary. The process is applicable to the isolation of histidine, lysine, hydroxylysine, arginine, serine, threonine, proline, hydroxyproline, glycine, alanine, valine, leucine, isoleucine, methionine, glutamic acid, aspartic acid, phenylalamine, tyrosine and tryptophane or mixtures thereof from protein hydrolysates; the recovery of citric, ascorbic and tartaric acids from slops and citrus wastes; and the purification of linoleic, linoleuic, oleic ricinoleic, stearic, palmitic, myristic and lauric acids. Specifications 874,945 and 976,335 are referred to.ALSO:Rare earths, copper and silver are separated from each other, from spinning waste waters of cuprammonium rayon and from photographic wastes, respectively, by contacting the above-mentioned sources in liquid form with a water-insoluble functional derivative of cellulose crystallite aggregates having an average level-off degree of polymerization of between 15 and 375 anhydroglucose units. The functional derivatives may be characterized by carboxylic, carboxylic ester, phosphate ester, sulphate ester, phosphorous ester, boric ester, ureido, aldehyde, hydroxyl, ether, carboxyether, phosphonoalkyl ether, sulphoalkyl ether, sulphinoalkyl ether and alkylaminoalkylether groups, or by groups introduced by treatment with epichlorohydrin and triethanolamine. The functional derivative preferably has ion-exchange properties and the metals are recovered by pouring the source through a column of the derivative. The metals are adsorbed by the column and may be recovered by suitable elution. Specifications 874,945 and 976,335 are referred to.