Compound Celluloses 



143 



(250 c.c.) at 15-18. Weight of product, 4-55 grms. ; with ash, 

 5*0 p.ct. j CrO 3 fixed, equivalent to 4/2 p.ct. Cr 2 O 3 . 



(2) 1-8 grm. fibre j 100 c.c. i p.ct. CrO 3 ; 16 hours at 15*. 

 Product, 1-82 grm. ; ash, 4-3 ; CrO 3 fixed, equivalent to 37 p.ct. 

 Cr 2 O 3 . 



CrO 3 and acetic acid. 1*8 grm. fibre; 100 c.c. i p.ct. 

 CrO 3 containing 4 grms. acetic acid : (a) digested 16 hours, 

 (b) digested 20 hours. 



The products were largely soluble in dilute alkaline solutions ; 

 the lignocellulose reactions were faint ; the characteristics of 

 the products were those of the oxycelluloses. 



CrO 3 and sulphuric acid (dilute). (i) 0*9 grm. fibre ; 100 c.c. 

 solution containing 0-874 CrO 3 and H 2 SO 4 : (a) r6 grm., () 

 3-2 grms., (c) 4-8 grms. 



The solution of the fibre-substance increases with the increase 

 of hydrolysing acid ; the deoxidation of the CrO 3 slightly de- 

 creasing. 



(2) Jute, o'9 grm. ; 100 c.c. solution containing variable 

 quantities of CrO 3 and H 2 SO 4 as under (CrO 3 solution, 0-842 

 CrO 3 per 10 c.c. ; H 2 SO 4 = 7-59 per 10 c.c.) : 



