摘要:
The invention relates to the removal of hydroxymonocarboxylic acids and tricarboxylic acids from aqueous solutions by adsorption on zeolites with a modulus of up to 400.
摘要:
Aqueous hydrogen peroxide solutions contain variable amounts of carbon compounds following their production by the so-called anthraquinone process. Various methods are known for separating out carbon compounds, including those using organic ion exchangers or macro-porous organic adsorber resins. Described is a process using a solid adsorption agent, which can be regenerated without causing any problems, whereby the carbon content is reduced. The solid adsorption agent is a zeolite from the set of dealuminised H-Y-zeolites with a (SiO.sub.2 /Al.sub.2 O.sub.3) ratio equal to or greater than 20 or H-mordenites with a (SiO.sub.2 /A1.sub.2 O.sub.3) ratio of at least 20.
摘要翻译:过氧化氢水溶液通过所谓的蒽醌法生产后含有不同量的碳化合物。 已知有各种分离碳化合物的方法,包括使用有机离子交换剂或大孔有机吸附剂树脂的方法。 描述了使用固体吸附剂的方法,其可以再生而不引起任何问题,由此碳含量降低。 固体吸附剂是来自(SiO 2 / Al 2 O 3)比等于或大于20的脱铝H-Y-沸石组,或(SiO 2 / A 12 O 3)比至少为20的H-丝光沸石组成的沸石。
摘要:
The invention relates to a process for removing amino acids and/or aminosulphonic acids from preferably aqueous solutions which contain these as impurities by adsorbing the amino acids on zeolites. Solutions to which the process according to the invention can be applied are produced, for example, from the industrial synthesis of oligopeptides in which the amino acids serving as starting materials are always present in solution, sometimes to a not inconsiderable residual concentration, together with the desired end product.
摘要:
A process for the isolation of L-leucine and L-isoleucine from an aqueous solution containing these amino acids and their separation from each other by contacting the solution with a zeolite under acid conditions.
摘要:
Disclosed is a method for the purification of exhaust air and/or effluents, which may be exhausted, for example, from auto painting units or furniture lacquering units, involving contacting the air and/or effluents with a molded body. The molded body is made from dealuminated zeolite Y and at least one binder, which may be, for example, bentonites, kaolins, sepiolites or attapulgites, and having a hydrophobic factor of from 1.5 to 6.0, wherein a slurry of the binder in water does not exceed a pH of 10 and wherein the molded body is calcined at 850° to 1100° C. The molded body is produced by a process involving mixing pulverulent dealuminated zeolite Y with at least one binder, optionally with the addition of a lubricant and/or a pore former, and optionally with water or an organic solvent, moulding the resulting mass to form a molded body, and drying and calcining the molded bodies.
摘要:
A process for the production of moulded bodies from dealuminated Y-zeolite (SiO.sub.2 /Al.sub.2 O.sub.3 >20) in which the microporous system of the zeolites and its characteristic adsorption properties are preserved and a binder whose slurry in water does not exceed a pH of 10 used in quantities of from 2 to 40%, based on the quantity of zeolite mass put into the process.
摘要翻译:由脱铝的Y型沸石(SiO 2 / Al 2 O 3> 20)生产模制体的方法,其中保留了沸石的微孔体系及其特征吸附性能,并且其中在水中的浆料不超过10的粘合剂 基于投入该过程的沸石量的2〜40%。
摘要:
A process for the separation of amino acids from aqueous solutions by adsorption on zeolites of different types. It is unnecessary to separate the biomass prior to the treatment.