SU134841A1 - The method of producing cation exchangers - Google Patents
The method of producing cation exchangersInfo
- Publication number
- SU134841A1 SU134841A1 SU462490A SU462490A SU134841A1 SU 134841 A1 SU134841 A1 SU 134841A1 SU 462490 A SU462490 A SU 462490A SU 462490 A SU462490 A SU 462490A SU 134841 A1 SU134841 A1 SU 134841A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- cation exchangers
- copolymer
- producing cation
- styrene
- producing
- Prior art date
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- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Description
Известные способы получени катионнтов хлорированием сополимеров стирола с дивинилбензолом основаны на применении монохлорметилового эфира в качестве хлорметилирующего начала, которое осложн етс необходимостью его предварительного синтеза и высоко токсичностью. Более целесообразным вл етс реакци Блана, по которой хлорирование производ т параформальдегидом в присутствии газообразного хлористого водорода и безводного хлористого цинка.The known methods for the preparation of cations by the chlorination of copolymers of styrene with divinylbenzene are based on the use of monochloromethyl ether as a chloromethylation agent, which is complicated by the necessity of its preliminary synthesis and high toxicity. More appropriate is the Blanc reaction, in which chlorination is carried out with paraformaldehyde in the presence of gaseous hydrogen chloride and anhydrous zinc chloride.
По предлагаемому способу хлорметилирование возможно производить формалином вместо параформальдегида и без применени катализатора . Дл получени карбоксилсодержащего катионита, хлорметилированный сополимер стирола после обработки щелочью п промывки окисл ют азотной кислотой.According to the proposed method, chloromethylation can be carried out with formalin instead of paraformaldehyde and without the use of a catalyst. To obtain a carboxyl-containing cation exchanger, the chloromethylated styrene copolymer after treatment with alkali and washing is oxidized with nitric acid.
Дл получени карбоксилсодерн ащего катионита может быть применена следующа рецептура (в вес. ч.):The following recipe can be used to obtain carboxyl-containing cation exchanger (in weight parts):
сополимер стирола и дивинилбензола (гранулы)-100copolymer of styrene and divinylbenzene (granules) -100
формалин 35-40%-ной концентрации-ПОformalin 35-40% concentration-PO
сол на кислота концентрированна - 34hydrochloric acid concentrated - 34
В смесь указанных веществ пропускают газообразный хлористый водород при непрерывном перемешивании и температуре 60-70°; длительность реакции 6-8 час. Полученный хлорметилированиый сополпмер стирола содерл ;ит 19,8% хлора. Затем на 100 вес. ч. хлорметилированного сополимера стиролаберут 100 вес. ч. 10%-ного раствора натровой щелочи и 200 вес. ч. 65%-ного раствора азотной кислоты. Сополимер обрабатывают раствором щелочи при температуре 100° в течение 8 час, отдел ют его, отмывают и обрабатывают раствором азотной кислоты при темиературе 110-120° в течение 4 час.Hydrogen chloride gas is passed into the mixture of these substances with continuous stirring at a temperature of 60-70 °; reaction time 6-8 hours. The resulting chloromethylation copolymer of styrene contains as much as 19.8% chlorine. Then at 100 weight. including chloromethylated copolymer styreneaberut 100 weight. including 10% sodium hydroxide solution and 200 wt. h. 65% aqueous solution of nitric acid. The copolymer is treated with an alkali solution at a temperature of 100 ° for 8 hours, separated, washed and treated with a solution of nitric acid at 110-120 ° for 4 hours.
№134841-2,Емкость катионита 3,5:-4,5 мг экв/г. Набухаемость. от 20 до 100%-в зависимости от типа соиолимера. Полимер обладает большей степенью диссодиации срдвлительно, с сополим ерами метакриловой . кислоть.No. 134841-2, Cation exchanger capacity 3.5: -4.5 mg eq / g. Swelling from 20 to 100%, depending on the type of soiolimer. The polymer has a greater degree of dissociation sdvlazhlenno, with methacrylic copolymers. acid
П р е д: м е т и з о б р е т е н и- :PRIORITY: MEETH and WAll of:
Способ получени катионитов хлор.метилированием сополимероа стирола с дивинилбензолом, отличающийс тем, что, с целью получени карбоксилевдержащеге каташната хлорметилированный сополимер стирола после обработки щелочью и, промывки окисл ю.т азотной кислотой.The method of producing cation exchangers with chlorine by methylation of copolymer styrene with divinylbenzene, characterized in that, in order to obtain a carboxyl-containing catallate, the chloromethylated styrene copolymer after treatment with alkali and washing with an oxide of y.t.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU462490A SU134841A1 (en) | 1956-10-20 | 1956-10-20 | The method of producing cation exchangers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU462490A SU134841A1 (en) | 1956-10-20 | 1956-10-20 | The method of producing cation exchangers |
Publications (1)
Publication Number | Publication Date |
---|---|
SU134841A1 true SU134841A1 (en) | 1960-11-30 |
Family
ID=48291190
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU462490A SU134841A1 (en) | 1956-10-20 | 1956-10-20 | The method of producing cation exchangers |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU134841A1 (en) |
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1956
- 1956-10-20 SU SU462490A patent/SU134841A1/en active
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