US47505A - Improved mode of disintegrating vegetable substances for paper-pulp - Google Patents

Description

UNITED STATES PATENT. OFFICE.

'ZEPHTRIN GASPARD ALEXANDRE NATHAN PETBONE ORIOLT, 'AMABLE ALFRED FREDET, AN D PIER-RE AMABLE .lTENR-l MATUSSTERE, OF

PARIS, FRANCE.

IMPROVED MODE 0F DISINTEGRATING VEGETABLLE SUBSTANCES FOR PAPER-PULP.

Specification forming part ol Letters Patent No. 47,505, dated April 25, 1865. I

- To all whom it may concern:

Be it known that we, Z. G. A. N. I. ORIOLI, A.. A. FREDET, and P. A. H: llIAIUSSfERE, all of Paris, in the Empire of France, have invented a new and Improved Process for Disintegrating Fibrous Materials; and we do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to'fu'lly understand and use the same. I v

This invention is based on the discovery that aqua-regia, when applied in the proper proportion, destroys all ligneous matters without attacking the fiber or cellulose.

The aqua-regia which we use in carrying out our invention is composed of nitric and hydrochloric acid mixed together in about the following proportions: nitric acid, from five to forty per cent; hydrochloric acid, from ninety-fivd'. to sixty per cent. nitric acid in its raw state before it is bleached, and just as it is drawn from the reservoirs or tanks in which itis manufactured, and the hydrochloric acid weemploy in the state in which it usually comes in the market. The variation in the proportion of the two acids composing the aqua-regia is rendered necessary by the variable nature of the incrustating elements which attend the vegetable fibers, an d also of the variable strength of the acids. It

istherefore necessary to-determine in' each particular case,by a preliminary test, the exact propoition in which the acids have to be mixed. a

Our process is particularly applicable for the purpose of disintegrating wood of different kind, or for straw and other vegetable We employ substance, for the purpose of preparing paperpulp, and we proceed in the following manner: Ai'te1' the strength of theacid has been once determined for a particular kind of substance the wood is reduced into chips, the straw or other material of small diameter into fragments, and allowed to dry, so as to avoid an excess of water, which would weaken the aqua-regia. These chips or other fragments are digestedin the acid bath till they have absorbed their weight of the liquid, and the remaining acid ispoured oil and saved fora subsequent operation. After the vegetable substance has been removed from the acidit .is washed in clean water and the fibers are claim asnew and desire to secure by Lettels Patent- The within-described process .for disintegrating vegetable materials by the application of aquaregia, substantially in the mannerherein setforth.

Z. ORIOLI. A. FREDET. P. MATUSSIERE. Witnesses;

E. SHERMAN GOULD, C. Grnos.