The present invention relates to a method for producing bone gelatine having an isoelectric point of less than 6, comprising the following steps: a) providing bones of vertebrates; b) mechanically crushing the bones to a particle size of less than 1 500 μm, preferably less than 500 μm, more preferably less than 300 μm; c) extracting the crushed bones using an aqueous medium at a temperature of from 100 to 140° C., preferably from 120 to 130° C., for a period of from 0.5 to 10 min, preferably 1 to 5 min, more preferably 1 to 3 min; d) separating off the aqueous gelatine solution from the crushed bones; and e) drying the aqueous gelatine solution in order to obtain the bone gelatine having an isoelectric point of less than 6, wherein the method does not comprise liming of the bones with a base, and wherein the bones provided in step a) have not undergone liming. The invention further relates to bone gelatine having an isoelectric point of less than 6, produced by this method.

The present invention relates to a method for producing bone gelatine having an isoelectric point of less than 6, comprising the following steps: a) providing bones of vertebrates; b) mechanically crushing the bones to a particle size of less than 1 500 μm, preferably less than 500 μm, more preferably less than 300 μm; c) extracting the crushed bones using an aqueous medium at a temperature of from 100 to 140° C., preferably from 120 to 130° C., for a period of from 0.5 to 10 min, preferably 1 to 5 min, more preferably 1 to 3 min; d) separating off the aqueous gelatine solution from the crushed bones; and e) drying the aqueous gelatine solution in order to obtain the bone gelatine having an isoelectric point of less than 6, wherein the method does not comprise liming of the bones with a base, and wherein the bones provided in step a) have not undergone liming. The invention further relates to bone gelatine having an isoelectric point of less than 6, produced by this method.

The present invention relates to a method for producing collagen peptides from bones, comprising the following steps: a) providing bones of vertebrates; b) mechanically crushing the bones to a particle size of less than 1 000 μm, preferably less than 500 pm, more preferably less than 300 μm, at a temperature of less than 70° C. during the crushing; c) heating the crushed bones in an aqueous suspension to a temperature of above 100° C., preferably above 120° C., more preferably above 130° C., for a period of from 1 to 30 min, preferably 2 to 10 min, more preferably 4 to 8 min; d) adding one or more proteases to the suspension in order to obtain an aqueous solution of collagen peptides; and e) separating off the aqueous solution of collagen peptides from the crushed bones, wherein the method does not comprise maceration of the bones with an acid or liming of the bones with a base, and wherein the bones provided in step a) have not undergone maceration or liming. The invention further relates to collagen peptides produced by this method.

The present invention relates to a method for producing collagen peptides from bones, comprising the following steps: a) providing bones of vertebrates; b) mechanically crushing the bones to a particle size of less than 1 000 μm, preferably less than 500 pm, more preferably less than 300 μm, at a temperature of less than 70° C. during the crushing; c) heating the crushed bones in an aqueous suspension to a temperature of above 100° C., preferably above 120° C., more preferably above 130° C., for a period of from 1 to 30 min, preferably 2 to 10 min, more preferably 4 to 8 min; d) adding one or more proteases to the suspension in order to obtain an aqueous solution of collagen peptides; and e) separating off the aqueous solution of collagen peptides from the crushed bones, wherein the method does not comprise maceration of the bones with an acid or liming of the bones with a base, and wherein the bones provided in step a) have not undergone maceration or liming. The invention further relates to collagen peptides produced by this method.

This disclosure provides a high collagen composition prepared from a poultry broth and methods of making the same by filtration.

This disclosure provides a high collagen composition prepared from a poultry broth and methods of making the same by filtration.

The invention discloses a liquefaction device of hard bone, comprising: outer cavity having upper end detachably sealed with upper cover, and lower end openable/closable sealed with lower sealing cover, first liquefaction cavity coaxially slidably disposed in outer cavity, stainless steel cage disposed coaxially in first liquefaction cavity, second liquefaction cavity fixed to outer sidewall of outer cavity such that lower end portion of outer cavity is located in second liquefaction cavity. The invention also provides a method for co-production of bone collagen polypeptide and ultrafine bone powder based on liquefaction device, including: selecting hard bones, crushing; performing first-stage and second-stage liquefaction to obtain liquid phase and solid phase; centrifuging, concentrating, drying liquid phase to obtain bone collagen polypeptide; drying, coarsely and superfine pulverizing solid phase to obtain ultrafine bone powder. The invention has effects of simplifying process, improving production efficiency, and reducing production and equipment investments.

The invention discloses a liquefaction device of hard bone, comprising: outer cavity having upper end detachably sealed with upper cover, and lower end openable/closable sealed with lower sealing cover, first liquefaction cavity coaxially slidably disposed in outer cavity, stainless steel cage disposed coaxially in first liquefaction cavity, second liquefaction cavity fixed to outer sidewall of outer cavity such that lower end portion of outer cavity is located in second liquefaction cavity. The invention also provides a method for co-production of bone collagen polypeptide and ultrafine bone powder based on liquefaction device, including: selecting hard bones, crushing; performing first-stage and second-stage liquefaction to obtain liquid phase and solid phase; centrifuging, concentrating, drying liquid phase to obtain bone collagen polypeptide; drying, coarsely and superfine pulverizing solid phase to obtain ultrafine bone powder. The invention has effects of simplifying process, improving production efficiency, and reducing production and equipment investments.

A method for ecological utilization of silver carp, including the pretreatment of silver carp and the process of making canned fish surimi. The fish meat of silver carp is processed canned surimi. The fish heads and bones are heated and undergo enzymatic hydrolysis by enzymes, and the residues of the filtration are prepared for fish bone powder. A filtration membrane is used to reduce the volume of the filtrate to 50% of fish surimi and then the filtrate is frozen to ice. The frozen part can be added to fish surimi. The transparent part from membrane filtration was used to produce protein powder or ingredients for beverages. Fish offal can be used to produce protein liquid fertilizer. Fish scales and skins can be used to produce collagen. The method adopts ecological utilization, which makes the silver carp meat used effectively, including its processed wastes. The method is a closed cycle process such that that no pollutants or wastes are discharged during the process.

A method for ecological utilization of silver carp, including the pretreatment of silver carp and the process of making canned fish surimi. The fish meat of silver carp is processed canned surimi. The fish heads and bones are heated and undergo enzymatic hydrolysis by enzymes, and the residues of the filtration are prepared for fish bone powder. A filtration membrane is used to reduce the volume of the filtrate to 50% of fish surimi and then the filtrate is frozen to ice. The frozen part can be added to fish surimi. The transparent part from membrane filtration was used to produce protein powder or ingredients for beverages. Fish offal can be used to produce protein liquid fertilizer. Fish scales and skins can be used to produce collagen. The method adopts ecological utilization, which makes the silver carp meat used effectively, including its processed wastes. The method is a closed cycle process such that that no pollutants or wastes are discharged during the process.