CN1063803A

CN1063803A - From citrous fruit peels such as orange peel, obtain through refining the method for high-quality pectin

Info

Publication number: CN1063803A
Application number: CN91100783A
Authority: CN
Inventors: 刘敬齐; 叶晓红; 黄志圣
Original assignee: South-China Tropical Corp Products Processing Design And Research Inst Prc (c
Current assignee: South-China Tropical Corp Products Processing Design And Research Inst Prc (c
Priority date: 1991-02-02
Filing date: 1991-02-02
Publication date: 1992-08-26
Anticipated expiration: 2006-02-02
Also published as: CN1039493C

Abstract

A kind of method of from citrous fruit peels such as orange peel, obtaining through refining high-quality pectin, soak raw material such as the orange peel handled well with the compound water solution of inorganic sulfur and the liquid pectin decoloration is made with extra care, thereby obtain that lighter color, ash content are low, degree of gelation is at 150-200 ° high quality powder pectin with macroporous absorbent resin and weak-acid cation-exchange resin.

Description

From citrous fruit peels such as orange peel, obtain through refining the method for high-quality pectin

The invention belongs to the natural products comprehensive utilization.

From citrous fruit peels such as orange peel, obtain through refining pectin, nearly all adopt people's such as Lu Pei rock and Yang Dachuan conventional method (Food Science, nineteen eighty-three o. 11th P22～26 and P34～39), with citrous fruit peels such as orange peel choppings,, remove water-soluble substanceses such as sugar in the pericarp, organic acid, pigment with hot and cold (50～60 ℃) water pretreatment, then with inorganic acid solutions such as hydrochloric acid, pectin is extracted in heating under agitation, removes by filter undissolved skin slag with centrifuge etc. again, just can obtain liquid pectin; This glue with decolorizing and refinings such as active carbons, through operations such as concentrated, precipitation, drying, pulverizing, just can be obtained Powdered finished product pectin again.

The finished product pectin that adopts above-mentioned conventional method to obtain through refining, degree of gelation is low, the ash content height, technology quality index does not reach requirement. and yield is lower simultaneously, and cost is higher, and the liquid pectin decoloration is made with extra care when filtering very difficult.

The objective of the invention is at above-mentioned existing problems, adopt the compound water solution of inorganic sulfur to soak raw material and with the method for macroporous absorbent resin and weak-acid cation-exchange resin decolorizing and refining, it is refining to save activated carbon decolorizing, solve the problem of filtration difficulty, thereby reach the reduction content of ashes, every technology quality index of pectin such as raising pectin grade, and improve glue yield and the cost that reduces finished product pectin.

Technology method of the present invention is, with what shredded, the citrous fruit peel raw materials such as orange peel that preliminary treatment is good, with accounting for 0.1～50% of total acid content, the compound water solution that is preferably 1～30% inorganic sulfur soaks, then add an amount of phosphoric acid and regulate acidity and reach needed pH value or inorganic acids such as needed inorganic sulfide compound and hydrochloric acid are added preliminary treatment together good with inorganic acids such as hydrochloric acid, and called in the citrous fruit peel raw materials such as orange peel of the required water yield, under agitation heating hydrolysis extracts pectin. then, remove by filter the skin slag with terylen cloth or centrifuge, and pectin solution usefulness macroporous absorbent resin that obtains after essence is filtered and weak-acid cation-exchange resin decolorizing and refining (liquid pectin: resin=100: 5～25). after concentrate, precipitation, dry, crushing screenings etc. then can obtain lighter color, the Powdered finished product pectin that degree of gelation is high.

Compared with the prior art the present invention has following characteristics:

1, the pectin that the present invention obtained through refining is high-quality pectin, and color and luster is greyish white, and degree of gelation is 150～200 °, ash content＜2%, loss on drying＜10%, PH=2.8 ± 0.2, arsenic content＜0.0002%, content of beary metal＜0.0008%.

2, work simplification of the present invention is easy to operate, and glue yield can improve more than 10% than general salt acid system, and finished product pectin production cost reduces about 20%.

3, the finished product jelly powder that the present invention obtained through refining is stored steady quality, and sealing is stored in dry low temperature environment 1 year, and the degree of gelation reduction is less than 7%.

4, the finished product pectin that the present invention obtained through refining can be widely used in food industry, medical industry and the light industry cosmetics industry.

Facilities and equipments of the present invention are conventional equipment.

Embodiment

Restrain dry orange peel through the hot water rehydration with 100, chopping, hot-water soak, the flowing water rinsing is clean, after filter is done, add 1500 ml deionized water, always add the oxide water solution that 1～30% of acid amount adds inorganic sulfur according to accounting for, then add small amounts of phosphoric acid and regulate acidity and reach about PH2.0 with hydrochloric acid, under agitation be heated to 88～95 ℃, be incubated hydrolysis in 40 minutes and extract pectin. then, remove by filter the skin slag with terylen cloth or centrifuge, just can obtain liquid pectin. can in the skin slag, add 600 ml deionized water, carry of glue again and handle filtration in 20～30 minutes by the macroporous absorbent resin and the weak-acid cation-exchange resin of liquid pectin amount adding 5～25%, smart filter back just can obtain the liquid pectin of the light clarification of color and luster. and last, through concentrating, alcohol precipitation, filter is done, dry, crushing screenings etc. then can obtain the Powdered finished product pectin of 13.5 grams.

Claims

1, a kind of method of from citrous fruit peels such as orange peel, obtaining through refining high-quality pectin, comprise pretreatment of raw material, extract pectin, operations such as the glue slag separates, sol is refining, concentrate, precipitation, drying, it is characterized in that extracting the pectin operation is to use the compound water solution of inorganic sulfur to soak the good citrous fruit peel raw materials such as orange peel of preliminary treatment, then add inorganic acid such as hydrochloric acid and extract pectin, perhaps inorganic acids such as the compound of inorganic sulfur and hydrochloric acid are added together preliminary treatment good, and the citrous fruit peel raw materials such as orange peel of the modulated good water yield in extract pectin; Liquid pectin decoloration refining step is realized with macroporous absorbent resin and weak-acid cation-exchange resin.

2,, it is characterized in that the compound concentrations of used inorganic sulfur accounts for 0.1～50%. of total acid content according to the method for claim 1

3, according to the method for claim 1, the consumption that it is characterized in that used macroporous absorbent resin and weak-acid cation-exchange resin is a liquid pectin: resin=100: 5～25.

4,, it is characterized in that the pericarp raw material comprises dry pericarp of Citrus such as the orange peel of squeezing the juice, orange peel, lemon peel and shaddock ped or fresh pericarp according to the method for claim 1.