SU136348A1 - The method of purification of diphenylolpropane - Google Patents
The method of purification of diphenylolpropaneInfo
- Publication number
- SU136348A1 SU136348A1 SU682185A SU682185A SU136348A1 SU 136348 A1 SU136348 A1 SU 136348A1 SU 682185 A SU682185 A SU 682185A SU 682185 A SU682185 A SU 682185A SU 136348 A1 SU136348 A1 SU 136348A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- diphenylolpropane
- purification
- solution
- filtered
- carbon dioxide
- Prior art date
Links
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 title description 13
- 238000000034 method Methods 0.000 title description 8
- 238000000746 purification Methods 0.000 title description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000003513 alkali Substances 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 210000004197 pelvis Anatomy 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000012264 purified product Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000001226 reprecipitation Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Известен способ очистки дифенилолпропана, заключающийс в растворении его в водном растворе щелочи с последующим высаживанием чистого продукта сильной минеральной кислотой. Однако дифенилолпропан , очищенный указанным способом, может содержать примеси солей дифенилолпропана и измен ть свой цвет за счет процессов окислени и осмолени , идущих на границе раздела фаз.A known method of purification of diphenylolpropane consists in dissolving it in an aqueous solution of alkali, followed by precipitating the pure product with a strong mineral acid. However, diphenylolpropane, purified by this method, may contain impurities of salts of diphenylolpropane and change its color due to the processes of oxidation and pitch, going on the phase boundary.
С целью упрощени процесса и повышени качества продукта предлагаетс способ очистки дифенилолпропана щелочно-кислотной перекристаллизацией, отличающийс тем, что в качестве кислотного осадител примен ют углекислый газ, образующийс при этом карбонат натри , не вызывает высаживани солей дифенилолпропана; процесс идет с полным разложением солей и позвол ет выделить продукт без содержани посторонних примесей. Сущность способа заключаетс в следующем: технический дифенилолпропан раствор ют в 4%-ном водном растворе щелочи, раствор фильтруют и через фильтрат при температуре 20-25° барботируют углекислый газ до полной нейтрализации щелочи. Выкристаллизовавшийс дифенилолпропан отфильтровывают и промывают водой.In order to simplify the process and improve the quality of the product, a method for the purification of diphenylolpropane with alkaline acid recrystallization is proposed, characterized in that carbon dioxide gas formed during sodium carbonate does not cause precipitation of diphenylolpropane salts as an acidic precipitant; the process proceeds with the complete decomposition of salts and makes it possible to isolate the product without any impurities. The essence of the method is as follows: technical diphenylolpropane is dissolved in 4% aqueous alkali solution, the solution is filtered, and carbon dioxide is bubbled through the filtrate at a temperature of 20-25 ° until the alkali is completely neutralized. The crystallized diphenylolpropane is filtered off and washed with water.
Пример. Технологический дифенилолпроцан загружают в подогретый до 50° 4%-ный водный раствор едкого натра, количества дифенилолпропана и едкого натра должны соответствовать мол рному соотнощению 1 : 2, что обеспечивает достаточную стабильность раствора, независ щую от вли ни углекислоты воздуха. После полного растворени дифенилолпропана раствор выдерживают при 20-25° в течение одного часа, фильтруют от примесей, не растворимых в щелочи и через фильтрат барботируют углекислый таз до полной нейтрализацш щелочи (обычно 2 часа). Выпавщий осадок фильтруют, промывают холодной водой до нейтральной реакции на фенолфталеин и сущат при температуре МО-120°. Выход очищенного продукта (т. пл. 152-154°) составл ет 92% в расчете на загруженный дифенилолпропан.Example. Technological diphenylolprothane is loaded into a 4% aqueous solution of caustic soda heated to 50 ° C, the amount of diphenylolpropane and caustic soda should correspond to a molar ratio of 1: 2, which ensures sufficient stability of the solution, independent of the effect of carbon dioxide of air. After the diphenylolpropane is completely dissolved, the solution is kept at 20–25 ° for one hour, filtered from impurities insoluble in alkali, and carbonate pelvis is bubbled through the filtrate until neutralization is complete (usually 2 hours). The precipitated precipitate is filtered, washed with cold water until neutral to phenolphthalein and existed at temperature MO-120 °. The yield of the purified product (mp. 152-154 °) was 92% based on the diphenylolpropane loaded.
№ 136348- 2 , П р.,е д м е т изобретени No. 136348-2, Pr., Edect of the invention
Сповоб бчисАсй дифенилолпропана щелочно-кислотным переосаждением , о тл-л-н а ю 1у,и и с тем, что, с целью улучшени качества продукта и упрощени - технологии очистки, осаждение дифенилолпропана осуществл ют с помощью углекислого газа из слабых щелочньй растворов нри температуре около 20.Diphenylolpropane is alkaline by reprecipitation, o tl-ln and y 1y, and so that, in order to improve product quality and simplify purification technology, the precipitation of diphenylol propane is carried out using carbon dioxide from weak alkaline solutions at temperature about 20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU682185A SU136348A1 (en) | 1960-10-15 | 1960-10-15 | The method of purification of diphenylolpropane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU682185A SU136348A1 (en) | 1960-10-15 | 1960-10-15 | The method of purification of diphenylolpropane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU136348A1 true SU136348A1 (en) | 1960-11-30 |
Family
ID=48292631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU682185A SU136348A1 (en) | 1960-10-15 | 1960-10-15 | The method of purification of diphenylolpropane |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU136348A1 (en) |
-
1960
- 1960-10-15 SU SU682185A patent/SU136348A1/en active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| SU136348A1 (en) | The method of purification of diphenylolpropane | |
| GB579459A (en) | Process for the purification of 4-hydroxycoumarins | |
| US2600620A (en) | Process of making colobtess | |
| US2533114A (en) | Manufacture of glutamic acid | |
| US1404056A (en) | Process for the purification of anthraquinone | |
| US2250332A (en) | Preparation of isocytosine | |
| US2267971A (en) | Process of producing glutamic acid | |
| US1494096A (en) | Process of separating naphthol-sulphonic acids | |
| GB670003A (en) | Improvements in or relating to process of producing glutamic acid and the glutamic acid resulting from said process | |
| US2487480A (en) | Process for producing ammonium sulfamate | |
| GB183485A (en) | A process for treating sugar juices | |
| GB650341A (en) | Method for the production of amido sulphonic acid | |
| GB875596A (en) | Proteinaceous material and method of preparing same | |
| GB428584A (en) | Improvements relating to processes for the treatment of lime aluminates | |
| US930091A (en) | Method of making 1-phenyl-2-3-dimethyl-4-sulfamino-5-pyrazolone and its salts. | |
| US2259563A (en) | Method of making guanyl urea sulphamate | |
| SU42645A1 (en) | The method of purification of 3-aminoalizarin | |
| US1529435A (en) | Process for the production of soluble barium salts | |
| SU118502A1 (en) | The method of obtaining vitamin B1 | |
| SU16664A1 (en) | The method of obtaining benzidine sulfate, free from impurities of lead salts | |
| SU31019A1 (en) | The method of obtaining sulfonic acids and tetraoxidine or their derivatives | |
| SU145567A1 (en) | Folic Acid Purification Method | |
| US1798030A (en) | Method for reducing nitroarylarsonic acids | |
| SU45290A1 (en) | The method of purification of hydroxynaphthoic acid | |
| SU502004A1 (en) | The method of obtaining 4-hydroxy-4 "-carboxydiphenylsulfone |