sulphocarbonate

This is a report presented to the Committee of Economic Arts of the above Society, dealing with the industrial progress in products obtained by means of the sulphocarbonate of cellulose (viscose).

Researches on Cellulose 1895-1900 C. F. Cross

_ -- In the formation of nitric esters and in the sulphocarbonate reaction the substance gave results similar to those obtaining for the jute fibre.

Researches on Cellulose 1895-1900 C. F. Cross

C_ {6} H_ {10} O_ {5} -- has little influence upon the viscose reaction, but lowers the viscosity of the solution of the sulphocarbonate prepared from it.

Researches on Cellulose 1895-1900 C. F. Cross

It has further been found that the oxides themselves can be dissolved in the cellulose alkaline sulphocarbonate (viscose) solution, and artificial threads have been spun containing from 25 to 30 p.ct. of the oxides in homogeneous admixture with the cellulose.

Researches on Cellulose 1895-1900 C. F. Cross

From this it appears that the process of solution as sulphocarbonate and regeneration of the cellulose, though it eliminates certain constituents of an ordinary bleached cellulose, which might be expected to cause instability, has really no effect in this direction.

Researches on Cellulose 1895-1900 C. F. Cross

As already pointed out, cotton cellulose passes quantitatively through the cycle of treatments involved in solution as sulphocarbonate and decomposition of the solution with regeneration as structureless or amorphous cellulose

Researches on Cellulose 1895-1900 C. F. Cross

The concluding lecture deals with later progress in the industrial applications of cellulose derivatives, chiefly the sulphocarbonate

Researches on Cellulose 1895-1900 C. F. Cross

_Dense structureless or non-fibrous cellulose nitrates_ can be industrially prepared (1) by nitrating the amorphous forms of cellulose obtained from its solution as sulphocarbonate (viscose).

Researches on Cellulose 1895-1900 C. F. Cross

NaOH, established (1) that there is no corresponding increase in the benzoylation, and (2) that this ester reaction and the sulphocarbonate reaction are closely parallel, in that the degree and limit of reaction are predetermined by the conditions of formation of the alkali cellulose.

Researches on Cellulose 1895-1900 C. F. Cross

In this respect again there is a close parallelism between the sulphocarbonate and benzoyl-ester reactions.

Researches on Cellulose 1895-1900 C. F. Cross