Method for measuring mass transfer rate in capillary-porous bodies

FIELD: chemistry.

SUBSTANCE: invention refers to general chemical engineering and is applicable to measure a mass transfer rate of various materials into capillary-porous bodies of leather and fur industries, wood processing, construction materials manufacturing, textile industry, etc. The method consists in the fact that capillary-porous body samples, e.g. leather, are filled with chemicals; this process involves sectioning specimens to be analysed to a chemical penetration speed as shown by a penetration depth per a unit of time. The capillary-porous bodies, e.g. thickness leather specimens are fixed in a retainer of a contrast colour, placed on a surface of a contrast colour and recorded by means of a remote digital camera fixed on a Tripod. The digital camera is provided with extension rings for macrophotography and a ring flash; a sample image is uploaded into a software programme for digital processing of colour images to generate a chemical penetration histogram into the thickness of the capillary-porous body, which is used to measure an area of the stained specimen, whereas a speed is calculated by the area of the stained specimen per a unit of time.

EFFECT: invention provides the more effective measurement of mass transfer speed in the capillary-porous bodies, and reducing the length of the process.

29 dwg, 6 tbl

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: method involves chrome tanning and post-tanning a semi-finished product through chrome tanning in the presence of a product of reaction of 3-aminopropyltriethoxysilane and glycidylmethacrylate in molar ratio of 1:2 and consumption of the chrome tanning agent and reaction product of 3-4% and 2-3% of the weight of the semi-finished product respectively. Neutralisation and hydrophobisation with a polymer tanning agent are then carried out for 30-40 minutes with consumption of the tanning agent equal to 8-10% of the weight of the semi-finished product. After that dyeing is carried out in the presence of a synthetic tanning agent in amount of 3-4% of the weight of the semi-finished product. Post-tanning is carried out with a plant-material tanning agent and the semi-finished product is also treated for 20-30 minutes with a product of reacting hexamethylenediamine with phosphoric acid and urea in the presence of glycerin in molar ratio of 1:3:3:0.5 respectively, in amount of 3-4% of the weight of the semi-finished product and for 20-30 minutes with organic acid in amount of 0.5-1.0% of the weight of the semi-finished product. Further, the semi-finished product undergoes greasing and re-treated for 40-50 minutes with a product of reacting hexamethylenediamine with phosphoric acid and urea in the presence of glycerin in molar ratio of 1:3:3:0.5 and consumption of 7-8% of the weight of the semi-finished product, volume ratio of 0.8-1.0 and temperature of 20-22C. Hydrophobisation with a polymer tanning agent, dyeing in the presence of a synthetic tanning agent, post-tanning with a plant-material tanning agent, further treatment with a product of reacting hexamethylenediamine with phoshoric acid and urea in the presence of glycerin in the said molar ratio and with organic acid is carried out in one bath. Separation and drying are carried out after all operations.

EFFECT: higher water-, fungus- and heat-resistance of leather under high moisture and temperature conditions, and wide range of special types of leather.

2 cl, 3 tbl, 5 ex

FIELD: process engineering, leather industry.

SUBSTANCE: after hide pickling, skins are sent to ageing. Then fur leather layer is processed by priming solution comprising chrome tanning agent with concentration of 9-18 g/l per chrome oxide. Skins are aged to effect main paste-tanning-stuffing and ageing.

EFFECT: improved organoleptic properties of fur skins, ie broach, softness, elasticity and higher tensile strength.

2 tbl, 3 ex

FIELD: chemistry, hide tanning.

SUBSTANCE: method relates to tanning hides and can be used in the leather industry. Animal hides are treated with a solution of chrome tanning agent with addition of an activating organic agent in form of aminocapronic acid at concentration of 8-12 g/l.

EFFECT: improved strength properties of hides and environmentally safe method.

5 ex

FIELD: leather industry.

SUBSTANCE: method involves pickling leather depilated hide with sodium chloride and sulfuric acid, addition of chrome tanning agent to the same bath in its consumption 0.5-0.6% of depilated hide mass as measured for chrome oxide, and chrome-plating is carried out for 2-4 h. Aliphatic dialdehyde is added to same bath in the concentration 3-6% of depilated hide mass, and treatment is carried out for 2-3 h wherein glyoxal or glutaraldehyde is used as dialdehyde. Invention provides enhancing thermal stability and strength properties of leather and can be used in tanning leathers for different designation and assortment.

EFFECT: improved tanning method.

2 cl, 1 tbl, 9 ex

FIELD: leather industry.

SUBSTANCE: method comprises pickling, tanning, and neutralizing the semifinished item. During pickling and subsequent tanning, the picking liquid is provided with acetate sodium in amount of 0.2-0.5 % and, then, chromic tanner in amount of 1.5-1.8%. The tanning is carried out until the pH of the solution reaches 4.2-4.4.

EFFECT: enhanced quality of tanning.

2 tbl

The invention relates to light industry and can be used in tanneries tanning leather

The invention relates to the leather industry and can be used in making leather for Shoe upper, lining and leather for clothing made from raw pork

The invention relates to the leather industry and can be used in the processing of irreversible collagen chrome tanning waste, mainly of chrome shavings, to obtain an additional source of protein raw materials in the production of gelatin, mezdrovogo glue and protein hydrolysate

FIELD: leather industry.

SUBSTANCE: method comprises pickling, tanning, and neutralizing the semifinished item. During pickling and subsequent tanning, the picking liquid is provided with acetate sodium in amount of 0.2-0.5 % and, then, chromic tanner in amount of 1.5-1.8%. The tanning is carried out until the pH of the solution reaches 4.2-4.4.

EFFECT: enhanced quality of tanning.

2 tbl

FIELD: leather industry.

SUBSTANCE: method involves pickling leather depilated hide with sodium chloride and sulfuric acid, addition of chrome tanning agent to the same bath in its consumption 0.5-0.6% of depilated hide mass as measured for chrome oxide, and chrome-plating is carried out for 2-4 h. Aliphatic dialdehyde is added to same bath in the concentration 3-6% of depilated hide mass, and treatment is carried out for 2-3 h wherein glyoxal or glutaraldehyde is used as dialdehyde. Invention provides enhancing thermal stability and strength properties of leather and can be used in tanning leathers for different designation and assortment.

EFFECT: improved tanning method.

2 cl, 1 tbl, 9 ex

FIELD: chemistry, hide tanning.

SUBSTANCE: method relates to tanning hides and can be used in the leather industry. Animal hides are treated with a solution of chrome tanning agent with addition of an activating organic agent in form of aminocapronic acid at concentration of 8-12 g/l.

EFFECT: improved strength properties of hides and environmentally safe method.

5 ex

FIELD: process engineering, leather industry.

SUBSTANCE: after hide pickling, skins are sent to ageing. Then fur leather layer is processed by priming solution comprising chrome tanning agent with concentration of 9-18 g/l per chrome oxide. Skins are aged to effect main paste-tanning-stuffing and ageing.

EFFECT: improved organoleptic properties of fur skins, ie broach, softness, elasticity and higher tensile strength.

2 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: method involves chrome tanning and post-tanning a semi-finished product through chrome tanning in the presence of a product of reaction of 3-aminopropyltriethoxysilane and glycidylmethacrylate in molar ratio of 1:2 and consumption of the chrome tanning agent and reaction product of 3-4% and 2-3% of the weight of the semi-finished product respectively. Neutralisation and hydrophobisation with a polymer tanning agent are then carried out for 30-40 minutes with consumption of the tanning agent equal to 8-10% of the weight of the semi-finished product. After that dyeing is carried out in the presence of a synthetic tanning agent in amount of 3-4% of the weight of the semi-finished product. Post-tanning is carried out with a plant-material tanning agent and the semi-finished product is also treated for 20-30 minutes with a product of reacting hexamethylenediamine with phosphoric acid and urea in the presence of glycerin in molar ratio of 1:3:3:0.5 respectively, in amount of 3-4% of the weight of the semi-finished product and for 20-30 minutes with organic acid in amount of 0.5-1.0% of the weight of the semi-finished product. Further, the semi-finished product undergoes greasing and re-treated for 40-50 minutes with a product of reacting hexamethylenediamine with phosphoric acid and urea in the presence of glycerin in molar ratio of 1:3:3:0.5 and consumption of 7-8% of the weight of the semi-finished product, volume ratio of 0.8-1.0 and temperature of 20-22C. Hydrophobisation with a polymer tanning agent, dyeing in the presence of a synthetic tanning agent, post-tanning with a plant-material tanning agent, further treatment with a product of reacting hexamethylenediamine with phoshoric acid and urea in the presence of glycerin in the said molar ratio and with organic acid is carried out in one bath. Separation and drying are carried out after all operations.

EFFECT: higher water-, fungus- and heat-resistance of leather under high moisture and temperature conditions, and wide range of special types of leather.

2 cl, 3 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention refers to general chemical engineering and is applicable to measure a mass transfer rate of various materials into capillary-porous bodies of leather and fur industries, wood processing, construction materials manufacturing, textile industry, etc. The method consists in the fact that capillary-porous body samples, e.g. leather, are filled with chemicals; this process involves sectioning specimens to be analysed to a chemical penetration speed as shown by a penetration depth per a unit of time. The capillary-porous bodies, e.g. thickness leather specimens are fixed in a retainer of a contrast colour, placed on a surface of a contrast colour and recorded by means of a remote digital camera fixed on a Tripod. The digital camera is provided with extension rings for macrophotography and a ring flash; a sample image is uploaded into a software programme for digital processing of colour images to generate a chemical penetration histogram into the thickness of the capillary-porous body, which is used to measure an area of the stained specimen, whereas a speed is calculated by the area of the stained specimen per a unit of time.

EFFECT: invention provides the more effective measurement of mass transfer speed in the capillary-porous bodies, and reducing the length of the process.

29 dwg, 6 tbl

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