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US 11,976,339 B2Granted
Method for producing sustainable leather using by-products from parts of all varieties and species of the genus Persea plant including among them both the american species and the hass variety as well
AssigneeCurtidos Trevino, S.A. De C.V.
InventorsLeonelo Trevino Cantu, Gerardo Trevino Cantu
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Abstract
A method is provided for producing sustainable leather using by-products from parts of all varieties and species of the plant genus Persea including among them both the American species and the Hass variety. A hide or leather may be produced by the method, and a method is provided for producing the natural tanning agents used in the method to produce sustainable leather and the natural tanning agents produced by the method.
Claims13
A method for the preparation of a natural tanning agent for use in tanning processes of hides and skins, obtained from avocado of the genus Persea in any variety of species, comprising the next stages:
- (a) crushing the seeds of the Persea genus plant avocados at any stage of maturation, until a particle size equal to or less than 5 mm is obtained;
- (b) soaking the crushed seeds, pulp, and peel of avocados of the plant of the Persea genus obtained in stage a), in a proportion of 10 to 30% of seeds and 70 to 90% of water (percentages in base weight);
- (c) heating the product from step b) at a temperature between 60 and 100° C. for a time between 15 minutes and up to 12 hours;
- (d) filtering the product from step c) through rapid filtration filters having a sieve mesh size between 100 to 500 microns to obtain:
- a filtered liquid which is derived from the seeds of avocados of the genus “Persea” and comprising a first component of the natural tanning agent;
- (e) recovering a paste which is the solid resulting from the filtering operation d) derived solely from the seeds of avocados of the genus Persea and comprising a second component of the natural tanning agent;
- (f) grinding the seeds, pulp, and peel of whole avocados of the genus Persea without having the degree of maturation required by the food industry;
- (g) soaking the ground seeds, pulp, and peel of Persea Americana avocados obtained in step f), in a proportion of 10 to 30% of the ground seeds, pulp and peel and 70 to 90% of water (percentages in base weight);
- (h) heating the product from step g) at a temperature between 60 and 100° C. for a period of time between 15 minutes and up to 12 hours;
- (i) filtering the product from step h) by means of rapid filtration filters having a sieve mesh size of between 100 to 500 microns to obtain:
- a filtered liquid derived from the seeds, pulp, and peel of the whole avocados of the genus “Persea” without having the degree of maturation required by the food industry and comprising a third component of the natural tanning agent;
- (j) mixing the first component, second component and third component of the natural tanning agent in a proportion of 33.3% (+/−15% to obtain a total of 100%) of each, to obtain the natural tanning agent.
9 more elements
A method for the tanning of raw hides and skins of cattle, goats and other livestock of all ages and various breeds comprising the general stages of soaking of raw hides or skins, tanning, dyeing, and lubrication, preparation of the crust, finishing and packaging,
- wherein using natural tanning agents derived from avocados of the genus Persea in any variety of species, wherein the method comprises the following steps that are executed at any time prior to starting with the dyeing and lubrication stage:
- (a) crushing the seed of avocados of the Persea genus plant at any stage of maturation;
- (b) soaking the crushed seed of avocados of the genus Persea obtained in step a), in a proportion of 10 to 30% of seeds and 70 to 90% water (percentages in base weight);
- (c) heating the product from step b) at a temperature between 60 and 100° C. for a period of time between 15 minutes and up to 12 hours;
- (d) filtering the product from step c) by means of rapid filtration filters having a sieve mesh size of between 100 to 500 microns to obtain:
- a filtered liquid which is derived from the seeds of avocados of the genus “Persea”, and which comprises a first natural tanning agent;
- (e) recovering a paste which is the solid resulting from the filtering operation from step d) derived solely from the seeds of the avocado genus Persea and comprising a second natural tanning agent;
- (f) grinding the seeds, pulp, and peel of all avocados of the Persea genus without having the degree of maturation required by the food industry;
- (g) soaking the ground seeds, pulp, and peel of Persea avocados obtained in step f), in a proportion of 10 to 30% of the ground seeds, pulp and peel and 70 to 90% of water (percentages in base weight);
- (h) heating the product from step g) at a temperature between 60 and 100° C. for a period of time between 15 minutes and up to 12 hours;
- (i) filtering the product from step h) by means of rapid filtration filters which have a sieve mesh size of between 100 and 500 microns to obtain:
- the filtered liquid derived from the seeds, pulp, and peel of the whole “Persea” avocados without the degree of maturation required by the food industry and comprising a third natural tanning agent;
- wherein the tanning stage comprises:
- adding from 100% to 150% water to a reactor containing leather soaked in the soaking stage (percentage based on the weight of the hides) at a temperature from 20 to 60 degrees Celsius and the first natural tanning agent, the second natural tanning agent and the third natural tanning agent are added in an amount of 3 to 25% of each (percentage based on the weight of the hides) and are attached to the collagen fibers by spinning the reactor at a rate of 2 to 14 revolutions per minute for a period time from 1 to 48 hours.
11 more elements
Dependencies are inferred from the claim text.