SU159500A1 - - Google Patents
Info
- Publication number
- SU159500A1 SU159500A1 SU805666A SU805666A SU159500A1 SU 159500 A1 SU159500 A1 SU 159500A1 SU 805666 A SU805666 A SU 805666A SU 805666 A SU805666 A SU 805666A SU 159500 A1 SU159500 A1 SU 159500A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- distilled
- dichlorooctane
- soda
- platinum
- subjected
- Prior art date
Links
- RTZKZFJDLAIYFH-UHFFFAOYSA-N diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 150000002009 diols Chemical class 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- OQYNFBPKTVQOKO-UHFFFAOYSA-N 1,1-dichlorooctane Chemical compound CCCCCCCC(Cl)Cl OQYNFBPKTVQOKO-UHFFFAOYSA-N 0.000 description 2
- 150000003982 chlorocarboxylic acids Chemical class 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L na2so4 Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 229960000583 Acetic Acid Drugs 0.000 description 1
- 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 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000012259 ether extract Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000012362 glacial acetic acid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- QYPUTBKHHRIDGS-UHFFFAOYSA-N octane-1,1-diol Chemical compound CCCCCCCC(O)O QYPUTBKHHRIDGS-UHFFFAOYSA-N 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- -1 titanium-platinum Chemical compound 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
Description
Предложен способ получени диолов, заключающийс в том, что соли хлоркарбоновых кислот подвергают электрохимической конденсации на платиновом, титано.-платиновом или графитовом аноде. Образующиес дихлоралканы омыл ют в щелочной среде с образованием соответствующих диолов.A method for the preparation of diols has been proposed, which consists in that the salts of chlorocarboxylic acids are subjected to electrochemical condensation on a platinum, titanium-platinum or graphite anode. The dichloroalkanes formed are saponified in an alkaline medium to form the corresponding diols.
Пример. В стекл нный цилиндрический электролизер, снабженный платиновым анодом , заливают 250 мл метанольного раствора, содержащего 60 г со-хлорпентановой кислоты, 1,26--2,33 г безводной соды (можно примен ть вместо соды металлический натрий в количестве 0,6-1,2 г). Электролиз провод т при анодной плотности тока 500-1500 а/м и температуре 60°С. Процесс продолжают до тех пор, пока при титровании пробы электролита по фенолфталеину реакци не будет слабощелочной . На это расходуют примерно 1,6 теоретического количества электричества. После окончани электролиза метанол отгон ют , остаток раствор ют в 50-100 мл дистиллированной воды и нейтрализуют лед ной уксусной кислотой по лакмусу. Продукт реакции экстрагируют эфиром, экстракты соедин ют и промывают 50/о-ным раствором соды дл удалени кислых продуктов. Затем эфирную выт жку сущат безводным сульфатом натри и отгон ют эфир. Остаток разгон ют под вакуумом. Втора фракци , которую отгон ют при 60-80°С (1,5-2,5 мм рт. ст.), представл ет собой дихлороктан-1,8 (n|f 1,452). Выход продукта 50-60о/о от теоретического .Example. In a glass cylindrical electrolyzer equipped with a platinum anode, 250 ml of a methanol solution containing 60 g of co-chloropentanoic acid, 1.26-2.33 g of anhydrous soda are poured (instead of soda, metallic sodium in an amount of 0.6-1 can be used , 2 g). The electrolysis is carried out at an anode current density of 500-1500 a / m and a temperature of 60 ° C. The process is continued until the reaction of the electrolyte sample on phenolphthalein is weakly alkaline. About 1.6 theoretical amounts of electricity are spent on this. After completion of the electrolysis, methanol is distilled off, the residue is dissolved in 50-100 ml of distilled water and neutralized with glacial acetic acid by litmus. The reaction product is extracted with ether, the extracts are combined and washed with 50 / oh soda solution to remove acidic products. The ether extract is then anhydrous sodium sulfate and the ether is distilled off. The residue is distilled under vacuum. The second fraction, which is distilled at 60-80 ° C (1.5-2.5 mm Hg), is dichlorooctane-1.8 (n | f 1.452). The product yield 50-60o / o from theoretical.
Дихлороктан омыл ют следующим образом . Во вращающийс автоклав загружают 400 мл 10«/о-ного раствора едкого натра и 60,0 г дихлороктана-1,8. Смесь нагревают в течение 5 час при температуре 160°С. По окончании реакции верхний органический слой отдел ют, сущат сульфатом натри и подвергают вакуумной разгонке. В начале отгон ют непрореагировавщий дихлороктан1 ,8 в количестве 21 г, а затем при те.мпературе 153-154°С и давлении 8 мм рт. ст. отгон ют октандиол-1,8 в количестве 28,6 г. Продукт представл ет собой бесцветную жидкость , быстро переход щую в кристаллическое состо ние. В перегонной колбе остаетс небольщое количество смолистого остатка.Dichlorooctane is washed as follows. 400 ml of a 10 "/ about-th solution of caustic soda and 60.0 g of dichlorooctane-1.8 are loaded into a rotating autoclave. The mixture is heated for 5 hours at a temperature of 160 ° C. At the end of the reaction, the upper organic layer is separated, dissolved in sodium sulfate and subjected to vacuum distillation. At the beginning, unreacted dichlorooctane1, 8 in the amount of 21 g is distilled off, and then at a temperature of 153-154 ° C and a pressure of 8 mm Hg. Art. 28.6 g octanediol-1.8 is distilled off. The product is a colorless liquid, rapidly turning into a crystalline state. A small amount of gummy residue remains in the distillation flask.
Элементарным анализом фракции 153- 154°С (8 мм рт. ст.) найдено в о/о: С-65,83; Н-13,09.An elementary analysis of the fraction 153-154 ° C (8 mmHg) was found in a / a: C-65.83; H-13.09.
CsHisOj.CsHisOj.
Вычислено в о/„; С-65,75; Н-12,32.Calculated in o / "; C-65.75; H-12.32.
В указанных услови х выход октандиола1 ,8 составл ет на стадии омыленн 90-92% при конверсии дихлороктана-1,8 65-70о/о.Under these conditions, the yield of octanediol 1, 8 is 90-92% at the saponified stage at a dichlorooctane conversion of 1.8-65-70 ° / o.
П р е д .м е т изобретени PRED. M et inventions
Способ получени диолов, о т л и ч а ю щ н йс тем, что хлоркарбоновые кислоты подвергают электрохимической конденсации с последующим омылением полученных при этом дихлоралканов в щелочной среде.The method of obtaining diols, which is based on the fact that chlorocarboxylic acids are subjected to electrochemical condensation, followed by saponification of the dichloroalkanes obtained in this process in an alkaline medium.
Publications (1)
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SU159500A1 true SU159500A1 (en) |
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