SU168673A1 - - Google Patents
Info
- Publication number
- SU168673A1 SU168673A1 SU879227A SU879227A SU168673A1 SU 168673 A1 SU168673 A1 SU 168673A1 SU 879227 A SU879227 A SU 879227A SU 879227 A SU879227 A SU 879227A SU 168673 A1 SU168673 A1 SU 168673A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- dicarboxylic acids
- solvent
- purification
- sulfuric ether
- acids
- Prior art date
Links
- 150000001991 dicarboxylic acids Chemical class 0.000 description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- 238000000746 purification Methods 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000005712 crystallization Effects 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 150000004653 carbonic acids Chemical class 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Description
Известен способ очистки дикарбоновых кислот путем обработки их органическим растворителем , например этиловым спиртом, с последующей кристаллизацией чистых кислот из растворител . Однако при таком способе степень очистки недостаточно высока.A known method of purification of dicarboxylic acids by treating them with an organic solvent, for example ethyl alcohol, followed by crystallization of pure acids from the solvent. However, with this method, the degree of purification is not high enough.
Дл повышени степени очистки предлагаетс в качестве растворител примен ть серный эфир и процесс вести в присутствии угольной пыли.To increase the degree of purification, sulfuric ether is proposed as a solvent and the process is conducted in the presence of coal dust.
Пример. К растворителю 300-500 мл серного эфира при перемешивании подливают 100 г сырых дикарбоновых кислот. После растворени дикарбоновых кислот добавл ют уголь в количестве до вес. от очищаемых кислот. Контактирование провод т при комнатной температуре в течение 1 час, после чего содержимое колбы помещают в фарфоровую воронку с дырчатым дном. Раствор дикарбоновых кислот в серном эфире отфильтровывают от твердой фазы. После отгонки серного эфира из раствора в колбе остаютс дикарбоновые кислоты.Example. With stirring, 100 g of crude dicarboxylic acids are added to the solvent with 300-500 ml of sulfuric ether. After dissolving the dicarboxylic acids, coal is added in an amount up to weight. from purified acids. The contacting is carried out at room temperature for 1 hour, after which the contents of the flask are placed in a porcelain funnel with a perforated bottom. A solution of dicarboxylic acids in sulfuric ether is filtered off from the solid phase. After distillation of the sulfuric ester from the solution, dicarboxylic acids remain in the flask.
В таблице приведены показатели качества дикарбоновых кислот до очистки и после очистки .The table shows the quality indicators of dicarboxylic acids before cleaning and after cleaning.
карбоновь х кислот в серном эфире после фильтрации охладить до температуры 3-5°С и выпавшие кристаллы отфильтровать и промыть на воронке чистым серным эфиром. Высушенные кристаллы кислоты имеют кислот34Carbonic acids in sulfuric ether after filtration, cool to a temperature of 3-5 ° C and filter the precipitated crystals and rinse on the funnel with pure sulfuric ether. Dried acid crystals have acids34
Предмет изобретени л , отличающийс тем, что, с uejibio повышеСпособ очистки дикарбоновых кислот путемпримен ют серный эфир и обработку ведут вThe subject matter of the invention, characterized in that, with the uejibio higher method of purification of dicarboxylic acids by applying sulfuric ether and the treatment is carried out in
обработки их органическим растворителем сприсутствии угольной пыли,processing them with an organic solvent with the presence of coal dust,
последующей кристаллизацией из растворите- 5subsequent crystallization from the solvent;
168673 168673
ни етепеии очистки, в качестве растворител no purification, as a solvent
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Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU168673A1 true SU168673A1 (en) |
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