CH315585A - Process for the production of alcohols from lower molecular weight alcohols - Google Patents

Description

  

  



  Process for the production of alcohols from lower molecular weight alcohols
The present invention relates to a process for the preparation of alcohols by reacting carbon monoxide with water vapor and lower molecular weight alcohols at lower temperatures and optionally elevated pressures. The reaction of alcohols with carbon oxide and steam has already been described by K. Ziegler ¸Pparative Organic Chemistry, Volume 36, Part I, Dietriehsehe Verlagsbuchhandlung, 1948, pages 115-154. These reactions were previously carried out in the presence of Metallea. Carbonyls and metal carbonyl hydrogen were used as catalysts.



   It has now been found there. The aforementioned reaction can be carried out particularly advantageously if catalysts are used which contain at least one metal from the 8th group of the periodic system either as such or in the form of a compound with a metallic bond state, for example as a carbide or nitride , and the amount of water vapor used is limited in such a way that the water vapor partial pressure does not exceed the partial pressure of the carbon oxide.

   B. the Wasserda. The partial pressure of the synthesis gas mixture increases so much that the quotient of carbon oxide: water vapor falls below the value 1, the amount of converted carbon oxide falls as a result of contact. ctoxydation constantly decreases in order to uf short response times pra. ktiseh drop to zero, the catalysts becoming ineffective within a few hours.



   The implementation can be at ordinary or elevated. Druek done.



   example
A co-catalyst known from oxo synthesis, consisting of cobalt, ThO2, copper and diatomaceous earth in a ratio of 100: 18: 3: 100, is first reduced with electrolyte hydrogen at 400 and at a space velocity of 500 for 4 hours.

   Now, 1 mol of methanol vapor is added to a carbon oxide / steam mixture which contains 1 mol of steam for every 3 mol of carbon oxide, and this gas / steam mixture is passed over the cobalt catalyst at a pressure of 100 atmospheres and a temperature of 210. About 30% of the methanol is consumed in the reaction. With a CO conversion of 90 ouzo, the methanol consumed appears in the synthesis product essentially as ethyl alcohol in addition to small amounts of methyl and ethyl acetate.



      PATENT CLAIM. UCH
Process for the production of alcohols by reacting carbon oxide with water

** WARNING ** End of DESC field could overlap beginning of CLMS **.



 

Claims (1)

** WARNING ** Beginning of CLMS field could overlap end of DESC **. Process for the production of alcohols from lower molecular weight alcohols The present invention relates to a process for the preparation of alcohols by reacting carbon monoxide with water vapor and lower molecular weight alcohols at lower temperatures and optionally elevated pressures. The reaction of alcohols with carbon oxide and steam has already been described by K. Ziegler ¸Pparative Organic Chemistry, Volume 36, Part I, Dietriehsehe Verlagsbuchhandlung, 1948, pages 115-154. These reactions were previously carried out in the presence of Metallea. Carbonyls and metal carbonyl hydrogen were used as catalysts. It has now been found there. The aforementioned reaction can be carried out particularly advantageously if catalysts are used which contain at least one metal from the 8th group of the periodic system either as such or in the form of a compound with a metallic bond state, for example as a carbide or nitride , and the amount of water vapor used is limited in such a way that the water vapor partial pressure does not exceed the partial pressure of the carbon oxide. B. the Wasserda. The partial pressure of the synthesis gas mixture increases so much that the quotient of carbon oxide: water vapor falls below the value 1, the amount of converted carbon oxide falls as a result of contact. ctoxydation constantly decreases in order to uf short response times pra. ktiseh drop to zero, the catalysts becoming ineffective within a few hours. The implementation can be at ordinary or elevated. Druek done. example A co-catalyst known from oxo synthesis, consisting of cobalt, ThO2, copper and diatomaceous earth in a ratio of 100: 18: 3: 100, is first reduced with electrolyte hydrogen at 400 and at a space velocity of 500 for 4 hours. Now, 1 mol of methanol vapor is added to a carbon oxide / steam mixture which contains 1 mol of steam for every 3 mol of carbon oxide, and this gas / steam mixture is passed over the cobalt catalyst at a pressure of 100 atmospheres and a temperature of 210. About 30% of the methanol is consumed in the reaction. With a CO conversion of 90 ouzo, the methanol consumed appears in the synthesis product essentially as ethyl alcohol in addition to small amounts of methyl and ethyl acetate. PATENT CLAIM. UCH Process for the production of alcohols by reacting carbon oxide with steam and lower molecular alcohols in the presence of catalysts at higher temperatures, characterized in that catalysts are used which contain at least one metal of the 8th group of the periodic table either as solehes or in In the form of a compound with a metallic bond state, and the amount of water vapor used is limited so that the water vapor partial pressure does not exceed the partial pressure of the carbon oxide. UNDER CLAIM Process according to claim, characterized in that one works at increased pressure.