Author Topic: 1,4-butanediol to GBL - Will this work?  (Read 23077 times)

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Semtex

  • Guest
Re: 1,4-butanediol to GBL - Will this work?
« Reply #40 on: September 02, 2000, 09:34:00 PM »
So there has been some trials with the THF route being discussed, has this route(BDO) been proven one way or the other yet...?



::)  ::)

placebo

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Re: 1,4-butanediol to GBL - Will this work?
« Reply #41 on: September 03, 2000, 06:51:00 AM »
I have the reagents to make the catalyst and will be trying it soon. Just waiting on some more equipment! Don't worry I will post all details of course!



It's people like me that make Unobtanium look like a dick!

lugh

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Alternative Catalyst
« Reply #42 on: March 05, 2004, 01:50:00 AM »
From CA 59 538 (1963):

New catalysts for obtaining tetrahydrofuran and y-butyro­lactone from 1,4-butanedioL V. I. Ivanskii and B. N. Dolgov (State Univ., Leningrad). Kinetika i Kataliz 4, 165-6(1963); cf. Shostakovskii, et al., CA 51, 12826i. Catalysts with the compositions. Cu 60%, Al2O3 15%, SiO2 25% (1) and NiO 60%, Al2O3 15%, SiO2 25% (II) are prepared by adding NaOH and Na silicate to hot solutions of the metal nitrates, drying the preciptates., heating at 250-450°, and reducing in an H2 stream. At 190-200°, catalyst I con­verts 1,4-butanediol (III) quantitatively to gamma-butyrolactone at a space velocity of 60 without carrier gas; at 300°, the yield of IV is only 18% and a complex mixture is formed. Between 190° and 260°, II converts III quantitatively to tetrahydrofuran at a space velocity of 60 without carrier gas; at 300°, AcH appears in the product. HO(CH2)3CHO is suggested as intermediate in the formation of IV.

Perhaps one of the members of Hyperlab can come up with the original journal article, this seems to bee a good alternative to the chromite catalyst  ;)