CN1042941C - Method for extracting low ester pectin from citrus waste - Google Patents
Method for extracting low ester pectin from citrus waste Download PDFInfo
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- CN1042941C CN1042941C CN 94109319 CN94109319A CN1042941C CN 1042941 C CN1042941 C CN 1042941C CN 94109319 CN94109319 CN 94109319 CN 94109319 A CN94109319 A CN 94109319A CN 1042941 C CN1042941 C CN 1042941C
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- pectin
- present
- decalcification
- citrus waste
- citrus
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Abstract
The present invention relates to a method for extracting low-ester pectin from citrus wastes. The present invention has the technology process that the citrus wastes are used as raw material; after degreasing and glue extraction are carried out by the methylase of the citrus wastes self, the citrus wastes are precipitated by calcium salt; after decalcification is carried out, the pectin of finished products is obtained through purification. In the present invention, because the settling out of calcium and the decalcification of oxalic acid are adopted, large amount of ethyl alcohol can be saved, and the production cost is reduced; the present invention has the advantages of convenient process, good color of the made low-fat pectin, low content of ash amount and high quality, and the present invention is suitable for industrial production.
Description
The present invention relates to a kind of method, particularly a kind of method from extracting low ester pectin from citrus waste.
Low-ester pectin is widely used in food, medicine and the Chemicals, and the method from extracting low ester pectin from citrus waste commonly used at present is to take off ester with methods such as acid or alkali, extracts through operations such as precipitations.It is to utilize the endogenous methoxyl group enzyme of citrus endodermis to take off the method that ester (using yellow soda ash as the enzymic activity activator) extracts low-fat pectin that report is also arranged, and has compared the influence to pectin methoxy content and gel degree of different time and pH value.Yet complete extraction process is not all proposed, up to the present, this method suitability for industrialized production that still is unrealized.
The objective of the invention is to avoid above-mentioned the deficiencies in the prior art part and provide a kind of technology easy, at a low price efficiently, be suitable for the method from extracting low ester pectin from citrus waste of suitability for industrialized production.
Purpose of the present invention can reach by following measure: the present invention is a raw material with the citrus waste, through himself methoxyl group enzyme degreasing, uses calcium precipitation after carrying glue, and purifying obtains finished product pectin after the decalcification.
Purpose of the present invention can also reach by following measure: add sodium bicarbonate during degreasing, sodium hydrogen carbonate solution accounts for 0.03～0.5% of total solution weight.With the calcium chloride precipitation, with oxalic acid and hydrochloric acid decalcification.Temperature is 30～60 ℃ during degreasing.
The present invention will now be further detailed embodiment:
Take by weighing and dry and powder essence are become the granular citrus waste of 2～5mm, the soft water that adds 20 kilograms 30～60 ℃, soaked 30～150 minutes, constantly stir, add simultaneously sodium bicarbonate (sodium bicarbonate alkalescence than sodium sulfate a little less than, can keep pectin grade better), make PH between 6～9, centrifugal.The slag that is produced is used for repeatedly washing, until effluent liquid be colourless till.Take out filter residue, add 20 kg water, heat to 95 ℃, add hydrochloric acid, transferring PH is 1.5～2.5, stirs 30～90 minutes, press filtration, filtrate adds calcium chloride solution, separates out fully until pectin, press filtration, filter residue add oxalic acid liquid 200～300 gram and the appropriate hydrochloric acid decalcifications of 10% concentration, stir, add 1.2～1.5 times of 95% ethanol, press filtration, filter residue adds equivalent volumetrical 95% ethanol, through squeezing, filter cake is 0.933 * 10 again
5In the vacuum drying oven of Pa pressure, use the temperature drying that is lower than 65 ℃ about 4 hours, pulverize, cross the sieve in 0.154mm (100 order) aperture, i.e. white, the of fine quality low glue pectin of Dry Sack.
The low-ester pectin that adopts the present invention to make by analysis, meets U.S. FCC quality standard.Its index is: 100 ± 5 grades of gel-strengths; Gamma value 36.9%; Rich lactobionic acid 62.3%; Weight loss on drying 11.56%; Ash 3.43%; Arsenic 0.19PPm; Plumbous 1.19PPm.
The present invention has following advantage compared to existing technology:
1, because of employing calcium precipitating, the oxalic acid decalcification, thereby can save a large amount of ethanol, reduce and give birth to Produce cost, can be suitable for suitability for industrialized production.
2, simple process, the low-fat pectin color and luster of making is good, and the ash content of coal is low, quality is high.
Claims (1)
1, a kind of method from extracting low ester pectin from citrus waste, it is characterized in that: with the citrus waste is raw material, through himself methoxyl group enzyme degreasing, adds sodium bicarbonate simultaneously, make pH value between 6～9, sodium hydrogen carbonate solution accounts for 0.03～0.5% of pectin extracting soln gross weight.Temperature is 30～60 ℃ during degreasing, and the slag that produces after centrifugal treating is used for repeatedly washing, and takes out filter residue, add entry, heat, add hydrochloric acid to 95 ℃, transferring pH value is 1.5～2.5, stirred 30～90 minutes, press filtration, filtrate is precipitated with calcium chloride, separate out fully until pectin, press filtration, filter residue adds the oxalic acid and the appropriate hydrochloric acid decalcification of 10% (weight) concentration, and purifying obtains the pectin finished product after the decalcification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94109319 CN1042941C (en) | 1994-08-12 | 1994-08-12 | Method for extracting low ester pectin from citrus waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94109319 CN1042941C (en) | 1994-08-12 | 1994-08-12 | Method for extracting low ester pectin from citrus waste |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1100106A CN1100106A (en) | 1995-03-15 |
| CN1042941C true CN1042941C (en) | 1999-04-14 |
Family
ID=5033866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94109319 Expired - Fee Related CN1042941C (en) | 1994-08-12 | 1994-08-12 | Method for extracting low ester pectin from citrus waste |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1042941C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101153306B (en) * | 2007-09-30 | 2011-01-19 | 湖南省农产品加工研究所 | Method for producing tangerine peel low methoxy group pectin by using pectinase |
| US8592575B2 (en) | 2011-06-06 | 2013-11-26 | Cp Kelco Aps | Process for extraction of pectin |
| CN102643883A (en) * | 2012-04-20 | 2012-08-22 | 上海应用技术学院 | Preparation method of low-ester pectin |
| CN103130913B (en) * | 2013-02-17 | 2016-08-03 | 暨南大学 | A kind of calcium pectinate and production method thereof and application |
| CN105542033A (en) * | 2016-01-27 | 2016-05-04 | 华中农业大学 | Preparation method of low-methoxyl citrus pectin |
| CN109438587A (en) * | 2018-10-17 | 2019-03-08 | 安徽宇宁果胶股份有限公司 | A kind of production technology of pharmaceutic adjuvant pectin |
| CN110615857A (en) * | 2019-08-28 | 2019-12-27 | 浙江环耀环境建设有限公司 | Method for recycling waste in orange can processing production |
-
1994
- 1994-08-12 CN CN 94109319 patent/CN1042941C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1100106A (en) | 1995-03-15 |
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| CF01 | Termination of patent right due to non-payment of annual fee |