Unlock instant, AI-driven research and patent intelligence for your innovation.
A kind of limited solvent method prepares the method for acetate starch
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of acetate starch and solvent method, which is applied in the field of preparation of acetate starch, can solve the problems of poor reaction uniformity, high synthesis temperature, easy caking, etc., and achieve the effects of stable reaction, easy drying and crushing, and reduced dosage
Active Publication Date: 2020-08-04
广西利佰兴食品集团有限公司
View PDF6 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
Dry production of modified starch has the advantages of simple process, high reaction efficiency, low energy consumption, and less environmental pollution, but there are still problems such as poor reaction uniformity, easy caking during starch alkalization, high synthesis temperature, and product substitution degree below 0.1, etc. insufficient
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
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0025] (1) With oxidized starch as raw material and ethanol as wetting medium, 4.5 parts of Na 2 CO 3 Mix with 6 parts of NaOH, add 50 parts of oxidized starch and stir well, and the stirring speed is 180r / min to obtain the mixture; then slowly add 12 parts of ethanol into the mixture, stirring while adding, so that the starch is fully wetted, and the obtained Wet the material and let it stand for 30 minutes, then slowly add 20 parts of acetic anhydride, and stir while adding, to obtain the reaction mixture;
[0026] (2) Put the obtained reaction mixture into a box-type reactor (oven), carry out acetylation reaction at 38°C for 100 minutes, after the acetylation is completed, dry at 50°C until constant weight, pulverize, and sieve to obtain Starch acetate in white powder form.
[0027] The DS value of the obtained rice acetate starch was 0.17.
Embodiment 2
[0029] (1) With oxidized starch as raw material, ethanol as wetting medium, by weight, 5 parts of Na 2 CO 3 Mix with 5 parts of NaOH, add 50 parts of oxidized starch and stir well, and the stirring speed is 160r / min to obtain the mixture; then slowly add 10 parts of ethanol into the mixture, stirring while adding, so that the starch is fully wetted, the obtained Wet the material and let it stand for 25 minutes, then slowly add 19 parts of acetic anhydride, and stir while adding dropwise to obtain a reaction mixture;
[0030] (2) The obtained reaction mixture was placed in a box reactor, and acetylated at 36°C for 80 minutes. After the acetylation was completed, it was dried at 46°C to constant weight, crushed, and sieved to obtain a white powder of acetate starch.
[0031] The DS value of the obtained rice acetate starch was 0.07.
Embodiment 3
[0033] (1) With oxidized starch as raw material, ethanol as wetting medium, by weight, 6 parts of Na 2 CO 3 Mix with 5 parts of NaOH, add 50 parts of oxidized starch and stir well, and the stirring speed is 150r / min to obtain the mixture; then slowly add 9 parts of ethanol dropwise into the mixture, stirring while adding, so that the starch is fully wetted, the obtained Wet the material and let it stand for 28 minutes, then slowly add 21 parts of acetic anhydride, and stir while adding dropwise to obtain the reaction mixture;
[0034] (2) Put the obtained mixture into a box-type reactor, carry out acetylation reaction at 37°C for 90 minutes, after the acetylation is completed, dry at 45°C to constant weight, pulverize and sieve to obtain white powder Acetate starch.
[0035] After testing, the DS value of the obtained acetate starch was 0.12.
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
Login to View More
Abstract
The invention discloses a method for preparing acetate starch by using a limited solvent process. The method comprises the following concrete steps: with oxidized starch as a raw material and ethanolas a wetting agent, uniformly mixing the oxidized starch, sodiumhydroxide and sodium hydrogencarbonate, dropwise adding ethanol into the obtained mixture under stirring so as to fully wet the mixture, subjecting the wetted mixture to standing for a period of time, then adding acetic anhydride, and carrying out uniform mixing so as to obtain a reaction mixture; and subjecting the reaction mixtureto a reaction at 35 to 38 DEG C for at least 60 minutes so as to obtain the acetate starch after completion of the reaction, wherein the usage amounts of sodiumhydroxide and sodium hydrogencarbonateare 10-20% and 6-15% of the weight of the oxidized starch, respectively, the usage amount of ethanol is 15-25% of the weight of the oxidized starch, and the usage amount of acetic anhydride is 30-45%of the weight of the oxidized starch. The method of the invention is less in the usage amounts of solvents and simple and easily controllable in process, and does not need special reaction equipment;the substitution degree of the obtained acetate starch is adjustable between 0.04-0.17.
Description
technical field [0001] The invention relates to a method for preparing acetate starch, in particular to a method for preparing acetate starch by a limited solvent method. Background technique [0002] Rice is the main food crop in my country and the main raw material for starch production. Every year rice production produces a large amount of broken rice, which is used to produce feed and has low economic value. According to the latest data from the database of the China Business Industry Research Institute, China’s rice output reached 130.42 million tons in 2014 and 144.85 million tons in 2016, and 10-15% of broken rice will be produced in rice processing. It is estimated that in 2014 my country’s broken rice Production reached at least 13.04 million tons, compared with 14.485 million tons in 2016. Because of its unique properties such as extremely low allergenicity, colorless and odorless, rice starch and its derivatives can be widely used in food, medicine, textile, pape...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More