SU638549A1

SU638549A1 - Method of purifying electrolytic production waste liquids

Info

Publication number: SU638549A1
Application number: SU762349297A
Authority: SU
Inventors: Елена Владимировна Замбровская; Игорь Николаевич Медведев; Аркадий Борисович Пашков; Татьяна Николаевна Рязанцева; Елена Антоновна Метельская; Наталья Борисовна Галицкая; Серафима Илларионовна Котикова
Original assignee: Научно-Техническое Объединение "Пластмассы"; Предприятие П/Я М-5885
Priority date: 1976-04-21
Filing date: 1976-04-21
Publication date: 1978-12-25

Description

Изобретение относитс к очистке сточных вод ионитами и может бить использовано цп очистки «токов гальванических производств,The invention relates to wastewater treatment with ion exchangers and can be used by the cleaning center of "electroplating production currents,

Известны способы очистки сточтгх вод гальванических производств pea- рентным осаждением и электрокоагул цией fi о.Methods are known for purification of water from electroplating plants by pea- ent deposition and electrocoagulation fi o.

Однако при раагентном и электро- iO коагул цнонном способах очистки сточных вод гальванических производств очистка происходит недостаточно полно, что не позвол ет использовать стоки повторно дл промывки деталей, §However, in the case of a ragent and electro-iO coagulum wastewater treatment methods of electroplating, cleaning is not sufficiently complete, which does not allow reuse to be used for washing parts,

Образующиес при этих способах осадки, содержащие ценные металлы в виде солей и гидроокисей, тер ютс безвозвратно из-за сложности их переработки .; The precipitates formed by these methods, containing valuable metals in the form of salts and hydroxides, are irretrievably lost due to the complexity of their processing.

Наиболее близким к предлагаемому изобретению по технической сущности и достигаемому результату вл етс способ очистки стоков гальванических производств, включающий сорбцию заг- «-5 р знений путем последовательного пропускани раствора через сильнокислот-. ный катионит в Я -форме, слабоосновной анионлт в ОН -форме и сильноосHOBHoft анионит в Oti -форме 2. 30The closest to the proposed invention in its technical essence and the achieved result is a method for cleaning the effluent of electroplating plants, including the sorption of contaminants by successively passing the solution through strongly acid. a new cation exchanger in I-form, a weakly basic anionlt in OH-form and a strong HOBhoft anion exchange resin in Oti-form 2. 30

Однако степень очистки воды гальванического производства по такому способу недостаточна дл возвращени ее в производство, Ионитовые фильтры бистро виход т из стро , вследствие окислени силькоосновного аниоиита.However, the degree of purification of electroplating water production by this method is not sufficient to return it to production. Ionite filters are quickly interrupted by the oxidation of a highly basic anioit.

Цель изобретени - увеличение степени очистки промывных вод гальванического производства и удешевление процесса путем предотвраыени окислени сильноосновного анконита и по вьииение срока службы ионитовах фильтров .The purpose of the invention is to increase the degree of purification of wash water from electroplating and reduce the cost of the process by preventing the oxidation of strongly basic anconite and increasing the service life of ion-exchange filters.

Это достигаетс способом, включающим сорбцию загр знений путеь последовательного пропускани раствора через сильнокислотный катионит в П форме, слабоосновной макропористый анконит винилпиридинового типа в ОН™ форме и сильноосновной анионит, вз тые в объемном соотношении 42-52 ; : 16-26: 27-37.This is achieved by a method that includes the sorption of contaminants by consistently passing the solution through a strongly acidic cation exchanger in the P form, a weakly basic macroporous vinylpyridine type anconite in OH ™ form and a strongly basic anion exchanger, taken in a volume ratio of 42-52; : 16-26: 27-37.

ПредпочтительнЕхМ вл етс использование макропористого слабоосновиого анионита винилпирндинового типа.Preferred: M is the use of a macroporous, weakly basic vinyl pyrndine anion exchanger.

Claims

Example: Commercially available ion exchangers (along the jpacTBopa) are loaded into glass columns with a diameter of 1.8 cm and a height of 50 cm: 55 ml of strongly acidic MI-porous cation exchanger KU-23, 25 ml of weakly basic macroporous anion exchanger of vinyl pyridium type 251, 38 m strong anion exchange resin gel structure. The cation exchanger is treated with a NaCl solution of hydrochloric acid, and the amionites with a 5% solution of caustic soda (the solution is supplied after ovate through AVV-17-8, then Atf-ZSi) before scavenging at the input and output for conversion into p Workers form and cleaning from low molecular weight impurities. Model plant containing 73 mg / l sodium sulfate 30 mg / l copper sulfate, 76 mg / l sodium hlsfida, 15 mg / l boric. T6i, 40 mg / l bichrs {potassium, 30 mg / l zinc sulphate, with pH 3.6, are passed through ion exchange filters on top of the NOEM with a scattering rate of 5 m / h. Passing the solution is completed when the sodium chloride concentration in the last sample is 10 mg / l. Through the filter system in the same direction, cation exchanger, weak basic anion exchanger, strong basic anion exchanger, 1 liter of distilled water is passed through, feeding the column from the bottom with such a speed that loosening of the ion exchanger occurs without overflow layers. Regeneration is carried out at a speed of 1-2 m / with the supply of solutions from top to bottom. The cation exchanger is regenerated with a 5% solution of hydrochloric acid. Regeneration of anion exchangers is carried out with sodium hydroxide solution successively through columns with LV-17-8, then. Ion exchangers were washed with distilled water in the same order as re-generation at a rate of m / h, water consumption for a cation exchanger was 250 ml, and for ionites, 1 l. Then again the wire sorption. The circuit resource is not reduced from cycle to cycle. In one Sorption cycle, a 17-, lb. solution is purified, which amounts to 149 Volumes of solution per one volume of ion exchangers. The water purified in this way corresponds to distilled or desalted indices and can be reused by production. The wastewater treatment of electroplating according to the proposed method allows to return 80-85% of water to the production, according to the salt content of the corresponding distilled or desalinated water, which leads to an improvement in the quality of electroplating coatings, while preventing environmental pollution and increasing the life of ionites. Claim 1. A method for cleaning electroplating plant effluent, including sorption of contaminants by successively passing a solution through a strongly acidic cation exchanger in C-form, weakly coherent in anion exchanger in OH-form and strongly basic anion exchanger in OH-form, characterized in that the degree of purification and cheapening of the process by preventing the oxidation of a strongly basic anion exchanger and increasing the service life of ion-exchange filters; cation exchangers, weakly basic anion exchangers and strongly basic anion exchangers are taken in a volume ratio of 42-52:: 1 6-2b: 27-37. 2. Method POP.1, distinguished by the fact that macroporous vinylpyridine anion exchanger is used as a weakly-hardened anion exchanger. Sources of information taken into account during the examination: 1. L. Milovanov. Wastewater treatment of electroplating plants, M., stroiizdat, 1973, p. 139.

2. GDR patent number 75985, cl. 85 C 1, from 05.09.70.