SU249396A1 - Method of producing 1-naphthol-3,6-disulfonic acid - Google Patents
Method of producing 1-naphthol-3,6-disulfonic acidInfo
- Publication number
- SU249396A1 SU249396A1 SU1177267A SU1177267A SU249396A1 SU 249396 A1 SU249396 A1 SU 249396A1 SU 1177267 A SU1177267 A SU 1177267A SU 1177267 A SU1177267 A SU 1177267A SU 249396 A1 SU249396 A1 SU 249396A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- naphthol
- disulfonic acid
- producing
- acid
- yield
- Prior art date
Links
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
1-Нафтол-3,6-дисульфокислота примен етс как азососта1вл гон1,а в производстве азокрасителей и активных красителей.1-Naphthol-3,6-disulfonic acid is used as azo-aostavol gon1, and in the manufacture of azo dyes and active dyes.
Известен способ получени 1-нафтол-3,6-дисульфокислоты из нафталин-1,3,6-трисульфокислоты щелочным плавлением под давлением . Выход 50-52%.A known method for producing 1-naphthol-3,6-disulfonic acid from naphthalene-1,3,6-trisulfonic acid by alkali fusion under pressure. Yield 50-52%.
С целью повышени выхода целевого продукта предлагаетс Ьпафтол-З.б-дисульфокислоту получать кип чением щелочного раствора 1-иафтол-3,6,8-трисульфокислоты с цинковой пылью в присутствии небольшой добавки хлористого олова с последующим выделением целевого продукта известными методами . Выход продукта в растворе 98-99%, в сухом виде 88-89% от теории. Степень превращени 1-нафтол-3,6,8-трисульфокислоты в целевой продукт устанавливают хроматографически , а также определ ют сульфит натри , образующийс при отщеплении сульфогруппы в 1 -нафтол-3,6,8-трисульфокислоте.In order to increase the yield of the target product, β-naphthol-Z.b-disulfonic acid is proposed to be obtained by boiling an alkaline solution of 1-yaftol-3,6,8-trisulfonic acid with zinc dust in the presence of a small addition of tin chloride, followed by isolation of the target product by known methods. The product yield in solution 98-99%, in dry form 88-89% of theory. The degree of conversion of 1-naphthol-3,6,8-trisulfonic acid to the target product is established by chromatography, and sodium sulfite, which is formed upon cleavage of the sulfo group in 1-naphthol-3,6,8-trisulfonic acid, is also determined.
Пример. 16,47 г (0,03 г-моль) 70%-ной 1нафтол-3 ,6,8-трисульфокислоты перемешиваютExample. 16.47 g (0.03 g-mol) of 70% 1-naphthol-3, 6,8-trisulfonic acid are mixed
при 113-114°С в течение 30 час в 30 мл 25%-ного водного раствора едкого натра с 4,5 г цинковой пыли и 0,15 г хлористого олова . После фильтрации и промывки цинковогоat 113-114 ° C for 30 hours in 30 ml of a 25% aqueous solution of caustic soda with 4.5 g of zinc dust and 0.15 g of tin chloride. After filtration and rinsing zinc
шлама получают 200 лы щелочного раствора, содержащего 8,97 г 100%-ной 1-нафтол-3,6-дисульфокислоты . Выход 98,24%. Щелочной раствор нейтрализуют сол ной кислотой до рН 8,0, отфильтровывают и промывают выпа-вшийsludge is obtained 200 ly of an alkaline solution containing 8.97 g of 100% 1-naphthol-3,6-disulfonic acid. Yield 98.24%. The alkaline solution is neutralized with hydrochloric acid to pH 8.0, filtered and the precipitate washed.
осадок. Затем упаривают до 60 мл и высаливают 6 г поваренной соли. После выдержки выпавший осадок фильтруют и сушат при 85- 90°С. Получают 16,51 г 49,2%-ной 1-нафтол3 ,6-дисульфокислоты. Выход 89% от теории.sediment. Then it is evaporated to 60 ml and 6 g of salt are salted out. After aging, the precipitated precipitate is filtered and dried at 85-90 ° C. 16.51 g of 49.2% 1-naphthol 3, 6-disulfonic acid are obtained. Output 89% of theory.
Предмет изобретени Subject invention
Способ получени 1-нафтол-3,6-дисульфокислоты , отличающийс тем, что, с целью повышени выхода целевого продукта, щелочной раствор 1-нафтол-3,6,8-трисульфокислоты кип т т с цинковой цылью в присутствии хлористого олова с последующим выделением целевого продукта известным способом.The method of producing 1-naphthol-3,6-disulfonic acid, characterized in that, in order to increase the yield of the target product, an alkaline solution of 1-naphthol-3,6,8-trisulfonic acid is boiled with zinc dust in the presence of tin chloride, followed by separation target product in a known manner.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1177267A SU249396A1 (en) | 1967-08-03 | 1967-08-03 | Method of producing 1-naphthol-3,6-disulfonic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1177267A SU249396A1 (en) | 1967-08-03 | 1967-08-03 | Method of producing 1-naphthol-3,6-disulfonic acid |
Publications (1)
Publication Number | Publication Date |
---|---|
SU249396A1 true SU249396A1 (en) | 1973-10-03 |
Family
ID=20441012
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU1177267A SU249396A1 (en) | 1967-08-03 | 1967-08-03 | Method of producing 1-naphthol-3,6-disulfonic acid |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU249396A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105777590A (en) * | 2014-12-26 | 2016-07-20 | 沈阳化工研究院有限公司 | Preparation method of dye intermediate 1-naphthol-3,6-disulfonic acid (RG acid) |
-
1967
- 1967-08-03 SU SU1177267A patent/SU249396A1/en active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105777590A (en) * | 2014-12-26 | 2016-07-20 | 沈阳化工研究院有限公司 | Preparation method of dye intermediate 1-naphthol-3,6-disulfonic acid (RG acid) |
CN105777590B (en) * | 2014-12-26 | 2017-09-15 | 沈阳化工研究院有限公司 | A kind of preparation method of the disulfonic acid of 1 naphthols of dyestuff intermediate 3,6 (RG acid) |
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