CN1109042C

CN1109042C - Process for extracting theasaponin from tea cake by using n-butyl alcohol

Info

Publication number: CN1109042C
Application number: CN 99115525
Authority: CN
Inventors: 张新生; 王德斌; 谭利娟; 陈永忠
Original assignee: Hunan Academy of Forestry
Current assignee: Hunan Academy of Forestry
Priority date: 1999-08-17
Filing date: 1999-08-17
Publication date: 2003-05-21
Anticipated expiration: 2019-08-17
Also published as: CN1263100A

Abstract

The present invention relates to a technology for extracting tea saponin from a sasangua cake, which comprises the following steps: normal butyl alcohol is added into the sasangua cake, heated and leached for four times; the leaching liquid is distilled in the state of reduced pressure to recover the normal butyl alcohol; a proper amount of water and a proper amount of lipase are added into a distillation still to carry out the operation of thermal insulation and stirring, and the mixture of the water and the lipase is filtered after standing and clarification to remove residual oil with the lipase; the tea saponin is washed with No. 6 gasoline to remove impurities; the washed tea saponin is dried, pulverized and packaged to obtain the finished product. The purity of the tea saponin prepared by the technology can be higher than 80%, and simultaneously, the product cost is reduced owing to the favorable recovery performance of the normal butyl alcohol having the advantages of difficult combustion, no influence on the health of human beings and animals, and high safety. Nutrient components, such as proteins, saccharides, etc., in leached tea dregs are completely reserved, and the tea dregs are easily processed into high protein feed, etc.

Description

From CHAKUBING, extract the technology of tea saponin with propyl carbinol

The present invention relates to utilize chemical process from the CHAKUBING raw material, to extract a kind of production technique of tea saponin, further be meant a kind of novel process of from CHAKUBING, extracting tea saponin with propyl carbinol.

Existing producing and manufacturing technique from CHAKUBING extraction tea saponin has water extract method, but the tea saponin purity that obtains is low, yield is low, and tea dregs of rice post-treatment difficulty is so method is seldom used at present; Also having a kind of is the ethanol extraction, and its vat liquor has stink, contaminate environment, and harmful HUMAN HEALTH, this method generally also are reluctant to adopt; Using many is the methyl alcohol extraction, and its advantage is that the tea saponin purity that obtains is higher relatively, can reach 60-70%, but that shortcoming is a methyl alcohol is inflammable and hypertoxic, thus poor stability, and difficult solvent recovery.Total aforesaid method of seeing, many tea saponin production units cause tea saponin product matter time valency low because extraction solvent is selected for use improperly, and protein and glucide in the grouts incur loss, and are unsuitable for producing feed, make that tea saponin production is low in economic efficiency.

The problems referred to above at the prior art existence, purpose of the present invention, be that a kind of purity height, yield height, the safe and reliable employing propyl carbinol novel process of extracting tea saponin from CHAKUBING as extraction solvent is provided, make the propyl carbinol solvent reclaim easily simultaneously, the tea dregs of rice after the extraction are processed into high protein feed easily.

Solution of the present invention is as follows.It comprises following processing step: 1. lixiviate: with adding doubly 90% propyl carbinol of 4-6 in the CHAKUBING, be heated to 66 ℃ of-74 ℃ of lixiviates 4 times, each 2 hours; 2. distillation: vat liquor places still kettle to distill under decompression state, and to reclaim propyl carbinol, vacuum degree control is at 0.06-0.09Mpa; 3. degreasing: in still kettle, add an amount of water, become the solution of total solid substance 20%, add the lipase of 1-2 ‰,, stirred 1 hour, leave standstill then, clarify, refilter in 45 ℃ of-50 ℃ of insulations; 4. washing: adopt gasoline washing tea saponin No. 6, remove impurity.

Technology of the present invention has following advantage: 1. utilize the selective dissolution ability of propyl carbinol, remove Residual oil with lipase, make the tea saponin purity height that obtains, reach more than 80%, a small amount of grease that obtains does not dissolve each other with tea saponin, and is very easily separated; Though 2. the price of propyl carbinol is more expensive slightly than ethanol, methyl alcohol, 117 ℃ of its boiling points, vacuum can distill for following 44 ℃, so recyclability is good; 3. security is apparently higher than ethanol and methyl alcohol extraction, because of propyl carbinol can fire but nonflammable, and to the not influence of health of humans and animals; 4. the protein in the tea dregs of rice after the lixiviate, carbohydrate nutrition keep fully, are easy to processing, can make high protein feed, and economic benefit significantly improves.

The invention will be further described below in conjunction with embodiment.

Embodiment: 1. get oil-containing and be the CHAKUBING 1kg below 1.5%, add propyl carbinol 4kg and water 0.4kg, be heated to 72 ℃, lixiviate 4 times, each 2 hours; 2. vat liquor is placed still kettle, under the 0.07Mpa vacuum state, distillation temperature is 70 ℃, reclaims most of propyl carbinol; When being distilled to remaining surplus liquid and being 2kg (be former vat liquor 37%), gas clean-up is to 0.09Mpa, and distillation temperature is 44 ℃, has steamed remaining propyl carbinol; 3. add an amount of water in still kettle, form the solution of total solid substance 20%, add 1.5 ‰ lipase, insulation was stirred 1 hour at 48 ℃, left standstill, clarified, and filtered then, got tea saponin; 4. wash the tea saponin that obtains with No. 6 gasoline, to remove impurity; The tea saponin that 5. will wash after the impurity elimination carries out drying and pulverizing, obtains purity at last and be 85% tea saponin 105 grams.

Claims

1, a kind ofly from CHAKUBING, extracts the technology of tea saponin, it is characterized in that it comprises following processing step: 1. lixiviate:, be heated to 66 ℃ of-74 ℃ of lixiviates 4 times, each 2 hours adding doubly 90% propyl carbinol of 4-6 in the CHAKUBING with propyl carbinol; 2. distillation: vat liquor places still kettle to distill under decompression state, and to reclaim propyl carbinol, vacuum degree control is at 0.06-0.09Mpa; 3. degreasing: in still kettle, add an amount of water, become the solution of total solid substance 20%, add the lipase of 1-2 ‰,, stirred 1 hour, leave standstill then, clarify, refilter in 45 ℃ of-50 ℃ of insulations; 4. washing: adopt gasoline washing tea saponin No. 6, remove impurity.

2, the technology of from CHAKUBING, extracting tea saponin with propyl carbinol as claimed in claim 1, it is characterized in that, the said vat liquor that places still kettle, under the 0.07Mpa vacuum state, distillation temperature is 70 ℃, reclaims most of propyl carbinol, when be distilled to remaining surplus liquid be former vat liquor 37% the time, gas clean-up is to 0.09Mpa, and distillation temperature is 44 ℃, has steamed remaining propyl carbinol.