The thermal conductivity and compressibility of several rocks under high pressures: P. W. Bridgman. (Amer. Jour. Sci., Feb., 1924.)
✍ Scribed by G.F.S.
- Book ID
- 104125366
- Publisher
- Elsevier Science
- Year
- 1924
- Tongue
- English
- Weight
- 120 KB
- Volume
- 197
- Category
- Article
- ISSN
- 0016-0032
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✦ Synopsis
With a temperature of about I8O ° C. and a heating period of about twenty-eight minutes, the yield of adhesive was 4o to 45 per cent. and the yield of furfural was I to I. 5 per cent., based on the air-dry weight of the cobs.
It was found that by prolonging the heating period for seven. to fifteen minutes the same yield of adhesive can be obtained and at the same time the yield of furfural can be increased to about 2 per cent without serious: adverse effect on the adhesive. With further heating the adhesive is rapidly decorgposed, with the formation of furfural. With a reaction period of two hours a maximum yield of furfural is obtained.
It has beer~ shown experimentally that pentosan adhesives are especially suitable for anthracite coal briquettes.