SU274284A1 - METHOD FOR REMOVING IMPURITIES FROM INDIGO-CARMINE SYNTHETIC DYE - Google Patents
METHOD FOR REMOVING IMPURITIES FROM INDIGO-CARMINE SYNTHETIC DYEInfo
- Publication number
- SU274284A1 SU274284A1 SU1320847A SU1320847A SU274284A1 SU 274284 A1 SU274284 A1 SU 274284A1 SU 1320847 A SU1320847 A SU 1320847A SU 1320847 A SU1320847 A SU 1320847A SU 274284 A1 SU274284 A1 SU 274284A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- carmine
- indigo
- dye
- removing impurities
- solvent
- Prior art date
Links
- KHLVKKOJDHCJMG-QDBORUFSSA-L disodium;(2E)-3-oxo-2-(3-oxo-5-sulfonato-1H-indol-2-ylidene)-1H-indole-5-sulfonate Chemical compound [Na+].[Na+].N/1C2=CC=C(S([O-])(=O)=O)C=C2C(=O)C\1=C1/NC2=CC=C(S(=O)(=O)[O-])C=C2C1=O KHLVKKOJDHCJMG-QDBORUFSSA-L 0.000 title claims description 5
- 239000012535 impurity Substances 0.000 title claims description 5
- 229960003988 indigo carmine Drugs 0.000 title claims description 5
- 235000012738 indigotine Nutrition 0.000 title claims description 5
- 239000004179 indigotine Substances 0.000 title claims description 5
- 239000000979 synthetic dye Substances 0.000 title claims description 3
- 239000000975 dye Substances 0.000 claims description 8
- UIIMBOGNXHQVGW-UHFFFAOYSA-M NaHCO3 Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 5
- -1 propyl butyl Chemical group 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 239000003792 electrolyte Substances 0.000 claims description 4
- 230000001264 neutralization Effects 0.000 claims description 4
- 239000003960 organic solvent Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims 1
- 238000004904 shortening Methods 0.000 claims 1
- 238000009835 boiling Methods 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 1
- 239000000989 food dye Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
Изобретение относитс к производству пищевых красителей, в частности к способам удалени вредных примесей из синтетических красителей индиго-кармина.The invention relates to the production of food dyes, in particular, to methods for removing harmful impurities from synthetic indigo carmine dyes.
Известен снособ удалени примесей из синтетического красител индиго-кармина путем растворени пасты красител , обработки полученного раствора электролитом и нейтральным органическим растворителем, отстаивани , фильтрации, сушки с последующим измельчением . Однако такой процесс удалени примесей довольно длителен, и краситель отдел етс недостаточно полно.A known method for removing impurities from a synthetic dye of indigo-carmine is by dissolving the dye paste, processing the resulting solution with an electrolyte and a neutral organic solvent, settling, filtering, drying and then grinding. However, this process of removing impurities is rather lengthy, and the dye is not completely separated.
Дл более полного отделени красител и сокращени продолжительности процесса предлагаетс в качестве электролита использовать двууглекислую соду, а в качестве нейтрального органического растворител - пропилбутиловый растворитель, при этом пасту красител , двууглекислую соду и пропилбутиловый растворитель берут в соотношени х: 1:0,3:1,84.For a more complete separation of the dye and reduction of the process duration, it is proposed to use bicarbonate soda as the electrolyte and propylbutyl solvent as the neutral organic solvent, while dye paste, bicarbonate soda and propylbutyl solvent are taken in ratios: 1: 0.3: 1, 84
Пример. 50 кг пасты индиго-кармина раствор ют в 500 л дистиллированной воды и нагревают до 60-70 С при перемешивании до полного растворени , затем ностеиенно небольшими порци ми внос т 15 кг двууглекислого натри . Раствор нагревают до кипени и кип т т 30 мин. В рубашку аппарата пускают воду, охлаждают реакционную массу до 70°С и постепенно приливают 92 кг пропилбутилового растворител . Раствор нагревают до кипени , кип т т в течение 30 мин с обратным холодильником, после чего останавливают мешалку п оставл ют реакционную массу на 16--18 час. После отстаивани раствор с осадком отфильтровывают на фильтрпрессе, сушатExample. 50 kg of indigo-carmine paste is dissolved in 500 liters of distilled water and heated to 60-70 ° C with stirring until completely dissolved, then 15 kg of sodium bicarbonate is added in small portions. The solution is heated to boiling and boiled for 30 minutes. Water is let into the jacket of the apparatus, the reaction mass is cooled to 70 ° C and 92 kg of propyl butyl solvent are gradually poured. The solution is heated to boiling, boiled for 30 minutes under reflux, then the stirrer is stopped and the reaction mixture is left for 16--18 hours. After settling, the solution with the precipitate is filtered on a filter press, dried
и измельчают обычным способом.and crushed in the usual way.
Предмет изобретени Subject invention
Claims (2)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU274284A1 true SU274284A1 (en) |
Family
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