Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Liquid-nitrogen refrigerating freshness-locking preservation method for Chinese mitten crabs

A technology of liquid nitrogen freezing and hairy crabs, which is applied in the direction of freezing/cooling preservation of meat/fish, preservation of meat/fish with chemicals, etc. It can solve the problems of water and nutrient loss, damage to hairy crab cell walls, and affect taste and nutrition. Achieve the effects of small loss of nutrients, good commercial prospects, and excellent overall quality

Inactive Publication Date: 2018-05-08
深圳前海无虾不欢餐饮管理有限公司
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, hairy crab products mainly include sales of fresh and live hairy crabs, frozen hairy crabs, etc. The sale of fresh and live hairy crabs requires high insurance costs, while frozen hairy crabs often severely damage the cell walls of hairy crabs, causing serious loss of water and nutrients, affecting taste and nutrition

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Liquid-nitrogen refrigerating freshness-locking preservation method for Chinese mitten crabs
  • Liquid-nitrogen refrigerating freshness-locking preservation method for Chinese mitten crabs
  • Liquid-nitrogen refrigerating freshness-locking preservation method for Chinese mitten crabs

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The preparation method of plant extract includes the following steps:

[0022] Add the cleaned bamboo leaves, wormwood and tangerine peels to a 50%-60% ethanol aqueous solution and soak at 60-70°C for 1 to 2 hours; the mass ratio of bamboo leaves, wormwood, tangerine peels and the ethanol aqueous solution is 1: (1.5~2.0):(0.3~0.5):(15~20);

[0023] Adjust the pH of the soaked mixture to 8.3-8.5, then decoct and extract for 30-40 minutes, filter after extraction, and collect the filtrate;

[0024] The filtrate is decolorized and concentrated to obtain a plant extract with a relative density of 1.15 to 1.25 measured at 25°C.

[0025] S2: Take out the hairy crabs processed in step S1, spray with ice water, cool to below 4°C and then dry;

[0026] S3: Steam and oil the hairy crabs processed in step S2, and then add seasonings. The mass ratio of hairy crabs to seasonings is 1: (0.5~0.8). After standing for 20-25 minutes, use a liquid nitrogen quick-freezer for liquid nitrogen freezin...

Embodiment 1

[0034] This embodiment provides a method for freezing and fresh-keeping of hairy crabs in liquid nitrogen, including the steps:

[0035] S1: Immerse the sieved and washed hairy crabs in the preservation liquid, the ratio of the mass of the hairy crabs to the volume of the preservation liquid is 1g:23mL, and stand for 11min;

[0036] Among them, the raw material components of the preservation liquid are calculated in parts by weight, including: 6 parts by weight of chitosan, 0.8 parts by weight of citric acid, 0.3 parts by weight of sodium hydroxymethyl cellulose, 1.4 parts by weight of sodium hexametaphosphate, and 18 parts by weight of plant extracts. 1100 parts by weight and water;

[0037] The preparation method of plant extract includes the following steps:

[0038] Add the cleaned bamboo leaves, wormwood and tangerine peels to a 55% ethanol aqueous solution and soak at 65°C for 1.5 hours; the mass ratio of bamboo leaves, wormwood, tangerine peels and ethanol aqueous solution is 1...

Embodiment 2

[0049] This embodiment provides a method for freezing and fresh-keeping of hairy crabs in liquid nitrogen, including the steps:

[0050] S1: Immerse the sieved and washed hairy crabs in the preservation liquid, the ratio of the mass of the hairy crabs to the volume of the preservation liquid is 1g:20mL, and let stand for 10 minutes;

[0051] Among them, the raw material components of the preservation liquid are calculated in parts by weight, including: 5 parts by weight of chitosan, 1.0 parts by weight of citric acid, 0.2 parts by weight of sodium hydroxymethyl cellulose, 1.5 parts by weight of sodium hexametaphosphate, and 15 parts by weight of plant extracts. Parts by weight and 1200 parts by weight of water;

[0052] The preparation method of plant extract includes the following steps:

[0053] Add the cleaned bamboo leaves, wormwood and tangerine peels to a 50% ethanol aqueous solution and soak at 60°C for 1 hour; the mass ratio of bamboo leaves, wormwood, tangerine peels and the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to a liquid-nitrogen refrigerating freshness-locking preservation method for Chinese mitten crabs. The method comprises the following steps: S1, screened and washed Chinese mitten crabs are soaked in preservative liquid and allowed to stand for preset time; S2, the processed Chinese mitten crabs in the step S1 are taken out, the taken out Chinese mitten crabs are sprayed by using ice water and cooled to 4 DEG C or below and the cooed Chinese mitten crabs are dried in air; S3, the processed Chinese mitten crabs in the step S2 are cooked, the cooked Chinese mitten crabs are processed in oil, then seasoning materials are added, the treated Chinese mitten crabs are put sill for preset time, and then liquid-nitrogen freezing is carried out; and S4, the obtained mixture in the step S3 is loaded into a packaging box, and vacuumizing for sealing and quick-freezing for locking freshness are conducted. The provided liquid-nitrogen refrigerating freshness-locking preservation method for the Chinese mitten crabs can reduce damage degrees of cell walls of the Chinese mitten crabs in freezing processes, reduce loss of moisture, thereby perfectly maintaining originalflavor and quality of the Chinese mitten crabs.

Description

Technical field [0001] The invention relates to the technical field of food processing, in particular to a method for freezing and fresh-keeping of hairy crabs in liquid nitrogen. Background technique [0002] Chinese mitten crabs are economic crabs, also known as river crabs, hairy crabs, clear water crabs, and hairy crabs. They are a well-known delicacy in China. Its chelipods are used for feeding and fighting enemies. The inner and outer edges of the palms are densely covered with villi, which gives the mitten crab its name. Crab contains more vitamin A, which is helpful for skin keratosis; it can also supplement calcium for children’s rickets and elderly osteoporosis. China is widely distributed in lakes along the north and south coasts. Among them, the Yangtze River has the largest yield and extremely delicious taste. Among them, the Honghu hairy crab is the most famous and has always been called the crown of crabs. At present, hairy crab products mainly include the sale o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): A23B4/09A23B4/20
CPCA23B4/09A23B4/20
Inventor 何彬
Owner 深圳前海无虾不欢餐饮管理有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com