Process for extracting pectin by using sisal hemp residue

Abstract

The invention discloses a process for extracting pectin by using sisal hemp residue. The process comprises: S1, raw material pretreatment; S2, enzyme inactivation through cooking; S3, near neutral extraction with an inorganic salt; S4, decolorization and impurity removal; S5, pressure reducing concentration; S6, crystallization; S7, three treatment combination; and S8, drying screening and pectinfinished product obtaining. According to the present invention, the solid technical basis is provided for the large-scale production of pectin and the ensuring of the normal pectin product supply through the rich raw material resources; the pectin is extracted by using the neutral inorganic salt as the auxiliary agent, such that the investment on the production equipment can be save about 30%; theproduced pectin is the natural low-fat pectin, such that the performance of the product is further improved, and the process has advantages of simpleness, effectiveness, safety, low cost and good benefits; and with the process, the volatilization of organic solvents and the unnecessary loss are effectively prevented, the pectin production safety achieves the relatively improved assurance, the loss of organic solvents is substantially reduced, the production cost is reduced, and the profit of pectin enterprises can be increased.

Description

technical field [0001] The invention relates to the application field of pectin extraction, in particular to a process for extracting pectin by using sisal residue. Background technique [0002] At present, the domestic pectin extraction process is usually, citrus peel (apple peel)→pretreatment→acid extraction→decompression concentration→decolorization→filtration→crystallization→washing→centrifugation→secondary washing→secondary centrifugation→drying→pectin finished product . However, with the continuous development of society and the continuous change of industry, the above-mentioned pectin extraction process has the following problems: [0003] 1. The raw materials used are relatively scarce, and the product supply cannot be stable and timely. [0004] The citrus peel that existing old technology adopts is to utilize the leftover waste of citrus canned food manufacturer, and the used raw material of producing apple pectin is also the discarded material after the apple sq...

AI Technical Summary

Problems solved by technology

[0005] 2. Acidic extraction has high requirements on system equipment, resulting in an increase in equipment investment

[0007] 3. Low product yield, high energy consumption and high production cost

Although the economic benefits of pectin manufacturers with the old technology are relatively good, due to the defects of the old technology, there is no large-scale production manufacturer (the largest actual monthly production is no more than 40 tons)

[0009] 4. The initial concentration is low, the amount of liquid that needs to be concentrated and evaporated is huge, the energy consumption is high, and the production cost is high

[0010] The initial concentration of the pectin extract in the existing old process is 0.4% to 0.5% (1.5% in the patented process) and needs to be increased by 30 times (10 times in the patented process) to concentrate to a crystallizable concentration of 15%, so the energy consumption is huge. Accounted for about 40% of the entire production cost

[0011] 5. The product quality is relatively poor

[0013] 6. Large investment in safety facilities during production

One is that the loss of organic solvent is large, and the other is that after the organic solvent is used, it is flammable and explosive, the safety factor is small, and the investment in safety protection is also large.