SU455918A1 - Wastewater treatment method of urea production - Google Patents

Wastewater treatment method of urea production

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Publication number
SU455918A1
SU455918A1 SU1837204A SU1837204A SU455918A1 SU 455918 A1 SU455918 A1 SU 455918A1 SU 1837204 A SU1837204 A SU 1837204A SU 1837204 A SU1837204 A SU 1837204A SU 455918 A1 SU455918 A1 SU 455918A1
Authority
SU
USSR - Soviet Union
Prior art keywords
urea
treatment method
wastewater treatment
urea production
formaldehyde
Prior art date
Application number
SU1837204A
Other languages
Russian (ru)
Inventor
Юрий Анисимович Иванов
Леонид Иванович Мусиенко
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to SU1837204A priority Critical patent/SU455918A1/en
Application granted granted Critical
Publication of SU455918A1 publication Critical patent/SU455918A1/en

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Description

1one

Изобретение относитс  к способу очистки сточных вод производства мочевины.This invention relates to a process for the treatment of wastewater from the production of urea.

Известен способ очистки сточных вод производства мочевины на катионитовых фильтрах , которые регенерируют растворами минеральных кислот.A known method of purification of wastewater from the production of urea on cationite filters, which are regenerated with solutions of mineral acids.

Соли мине|ральных кислот, выдел емые после соответствующей обработки регенерационного раствора, используют в качестве удобрени  в сельском хоз йстве.Salts of mineral acids, which are extracted after appropriate treatment of the regeneration solution, are used as fertilizer in agriculture.

Недостатком известного способа  вл етс  сложность технологии.The disadvantage of this method is the complexity of the technology.

С целью упрощени  процесса предлагаетс  дл  регенерации катионитовых фильтров исиользовать водный раствор, содержащий до 40 вес. %, например 37 вес. i%, формальдегида (ГОСТ 1625-61), имеющий кислую реакцию .In order to simplify the process, it is proposed to regenerate cationite filters and use an aqueous solution containing up to 40 wt. %, for example 37 wt. i%, formaldehyde (GOST 1625-61), having an acid reaction.

При использовании раствора формальдегида со щелочной реакцией () после проведени  нескольких циклов регенерации катионитовые фильтры довосстанавливают известным способом.When using a solution of formaldehyde with an alkaline reaction () after carrying out several cycles of regeneration, the cation-exchange filters are reconstituted in a known manner.

Полученный регенерационный раствор используют в качестве промежуточного продукта в производстве мочевиноформальдегидных смол или после св зывани  свободного формальдегида аммиаком в качестве удобрени  в сельском хоз йстве.The resulting regeneration solution is used as an intermediate in the production of urea-formaldehyde resins or after binding formaldehyde free with ammonia as a fertilizer in agriculture.

Пример. Сточные воды, содержащие 10 г/л мочевины и 0,5 г/л аммиака, очищаютExample. Wastewater containing 10 g / l of urea and 0.5 g / l of ammonia is purified

на катионитовых фильт1рах марки КУ-2-84 (ГОСТ 1305-68) в П-форме, использу  на 1 т очищаемой воды 0,06-0,07 г формальдегида. После катионитовых фильтров сточные воды содержат О-0,27 г/л мочевины и О-0,01 г/лon cationite filters KP-2-84 (GOST 1305-68) in the P-form, using 0.06-0.07 g of formaldehyde per ton of water to be purified. After cation filters, wastewater contains O-0.27 g / l urea and O-0.01 g / l

формальдегида. Соли аммони  и уротропин в них отсутствуют. Абсорбционно-об.менна  емкость катионитовых фильтров по аммиаку и мочевине составл ет2,1 и 1,0 мт-экв/г соответственно .formaldehyde. Ammonium and hexamine salts are absent. The absorptive capacity of the cation-exchange filters for ammonia and urea is 2.1 and 1.0 mEq / g, respectively.

2020

Состав регенерационных растворов, передаваемых производству мочевиноформальдегидной смолы и удобрений, приведен в таблице.The composition of the regeneration solutions transferred to the production of urea formaldehyde resin and fertilizers is given in the table.

Предмет изобретени Subject invention

Способ очистки сточных вод производства мочевины на катионитовых фильтрах с регенерацией последних, отличающийс  тем, что, с целью упрощени  процесса, регенерацию осуществл ют водным раствором формальдегида .The method of purification of wastewater from the production of urea on cationite filters with regeneration of the latter, characterized in that, in order to simplify the process, the regeneration is carried out with an aqueous formaldehyde solution.

SU1837204A 1972-10-13 1972-10-13 Wastewater treatment method of urea production SU455918A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1837204A SU455918A1 (en) 1972-10-13 1972-10-13 Wastewater treatment method of urea production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1837204A SU455918A1 (en) 1972-10-13 1972-10-13 Wastewater treatment method of urea production

Publications (1)

Publication Number Publication Date
SU455918A1 true SU455918A1 (en) 1975-01-05

Family

ID=20529539

Family Applications (1)

Application Number Title Priority Date Filing Date
SU1837204A SU455918A1 (en) 1972-10-13 1972-10-13 Wastewater treatment method of urea production

Country Status (1)

Country Link
SU (1) SU455918A1 (en)

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