SU213018A1 - METHOD OF OBTAINING UNLOCATED URETHANES - Google Patents
METHOD OF OBTAINING UNLOCATED URETHANESInfo
- Publication number
- SU213018A1 SU213018A1 SU1138791A SU1138791A SU213018A1 SU 213018 A1 SU213018 A1 SU 213018A1 SU 1138791 A SU1138791 A SU 1138791A SU 1138791 A SU1138791 A SU 1138791A SU 213018 A1 SU213018 A1 SU 213018A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- urethanes
- unlocated
- obtaining
- alcohols
- minus
- Prior art date
Links
- 150000003673 urethanes Chemical class 0.000 title claims description 4
- 150000001298 alcohols Chemical class 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- QPJDMGCKMHUXFD-UHFFFAOYSA-N Cyanogen chloride Chemical compound ClC#N QPJDMGCKMHUXFD-UHFFFAOYSA-N 0.000 claims description 2
- 239000002841 Lewis acid Substances 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 claims description 2
- 150000002170 ethers Chemical class 0.000 claims description 2
- 150000007517 lewis acids Chemical class 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims 1
- 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 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- HEZNVIYQEUHLNI-UHFFFAOYSA-N Ethiofencarb Chemical compound CCSCC1=CC=CC=C1OC(=O)NC HEZNVIYQEUHLNI-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- RFKZUAOAYVHBOY-UHFFFAOYSA-M copper(1+);acetate Chemical compound [Cu+].CC([O-])=O RFKZUAOAYVHBOY-UHFFFAOYSA-M 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Description
Мзвестно несколько способов получени незамещенных уретанов, один из которых состоит в том, что спирт подвергают взаимодействию с мочевиной при 120-160°С в присутствии ацетата меди в качестве катализатора.Several methods for the preparation of unsubstituted urethanes are known, one of which is that the alcohol is reacted with urea at 120-160 ° C in the presence of copper acetate as a catalyst.
С целью расширени сырьевой базы и упрощени .процесса, предлагаетс получать незамещенные уретаны взаимодействием спиртов с хлористым .цианом п,ри минус 15-20°С в присутствии кислот Льюиса, лучще в среде органических растворителей, например спиртов, простых эфиров.In order to expand the resource base and simplify the process, it is proposed to obtain unsubstituted urethanes by reacting alcohols with cyan chloride, minus 15-20 ° C in the presence of Lewis acids, better in organic solvents such as alcohols and ethers.
Пример. В реактор с мешалкой загружают 50 Л1Л метанола (с растворителем или без него), добавл ют 50 г ZnCU и 15 мл хлористого циана. Реакционную массу перемещивают не менее 2 час, .разлагают лед ной водой , органический слой извлекают эфиром.Example. 50 liters of methanol (with or without a solvent) are charged to a stirred reactor, 50 g of ZnCU and 15 ml of cyanic chloride are added. The reaction mass is transferred for at least 2 hours. It is decomposed with ice water, the organic layer is extracted with ether.
который затем отгон ют. Получают 18,6 г (86%) метилкарбамата с т. пл. 54°С.which is then distilled off. 18.6 g (86%) of methyl carbamate are obtained with m.p. 54 ° C.
Полученные технические продукты после отгонки эфира очиш;ают перекристаллизацией или перегонкой.The technical products obtained after the distillation of the ether are purified; they are recrystallized or distilled.
Предмет изобретени Subject invention
Claims (2)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU213018A1 true SU213018A1 (en) |
Family
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