Unlock instant, AI-driven research and patent intelligence for your innovation.

Process for obtaining a tannin extract isolated from grapes, tannin extract obtained and uses thereof

An extract and tannin technology, applied in the field of tannin extract, can solve the problems of low yield, unsuitable for use on an industrial scale, etc., and achieve the effects of improving light resistance and oxidation resistance, and low cost

Active Publication Date: 2019-06-28
UNIVERSITY OF LLEIDA
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method provides very low yields and therefore the method is not suitable for use on an industrial scale

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for obtaining a tannin extract isolated from grapes, tannin extract obtained and uses thereof
  • Process for obtaining a tannin extract isolated from grapes, tannin extract obtained and uses thereof
  • Process for obtaining a tannin extract isolated from grapes, tannin extract obtained and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Example 1: Tannin Extract Isolated from Grape Seed

[0079] chemical extraction

[0080] For 100 kg of whole dried grape seeds, 5 kg of sodium metabisulfite and 100 liters of distilled water are used. The aqueous solution contained 5% sodium metabisulfite.

[0081] All components were introduced into an autoclave reactor and water extraction was carried out there, the temperature was kept at 120° C. and the pressure was kept at 3 atmospheres for 1 hour.

[0082] Once the specified time has elapsed, a liquid tannin extract isolated from grape seeds suitable for tanning of skins is obtained.

Embodiment 2

[0083] Example 2: Tannin Extract Isolated from Grape Seed

[0084] chemical extraction

[0085]For 100 kg of whole dried grape seeds, 5 kg of urea and 100 liters of distilled water are used. The aqueous solution contained 5% urea.

[0086] All components were introduced into an autoclave reactor and water extraction was carried out there, the temperature was kept at 120° C. and the pressure was kept at 3 atmospheres for 1 hour.

[0087] Once the specified time has elapsed, a liquid tannin extract isolated from grape seeds suitable for tanning of skins is obtained.

Embodiment 3

[0088] Example 3 (reference example): Tannin extract isolated from grape pomace

[0089] chemical extraction

[0090] For 200 kg of pomace, 2 kg of sodium metabisulfite and 400 liters of distilled water are used.

[0091] All components were introduced into an autoclave reactor where water extraction was carried out, the temperature was kept at 136° C. and the pressure was kept at 5 atmospheres for 3 hours.

[0092] Once the specified time has elapsed, a tannin extract isolated from the pomace is obtained.

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

No PUM Login to View More

Abstract

A process is provided for obtaining a tannin extract isolated from grapes using grape seeds. The process comprises: preparing the grape seeds as the source of tannins; preparing an aqueous solution ofa polyphenol-solubilising agent selected from urea, a compound containing the SO3 group and sodium hydroxide at concentration ranging between 1% and 15% by weight; performing a single extraction in an autoclave reactor; separation and direct concentration in order to produce the isolated extract. The invention also relates to the tannin extract obtained. The new tannin extract isolated from grapeseeds comprises a mixture of tannins and non-tannins, the composition whereof provides the extract with improved antioxidant and light fastness properties. The tannin extract isolated from grape seeds further comprises a colouring agent.

Description

[0001] illustrate [0002] The present invention relates to a method for obtaining a tannin extract isolated from grapes. In particular, the present invention relates to a water extraction method for obtaining tannin extracts, which pays attention to the source of selected tannins and the type of polyphenol solubilizing agent used in the extraction step. [0003] The invention also relates to the tannin extract obtained by the steps defined in the method. Specifically, a new tannin extract isolated from grape seeds was obtained, which included a mixture of tannins and non-tannins, the composition of which provided the extract with improved antioxidant and photostability. The tannin extract isolated from grape seeds also includes coloring agents. [0004] The invention also relates to the use of a tannin extract isolated from grape seeds as a tanning agent, antioxidant and / or coloring agent in the tanning, food, cosmetic and / or pharmaceutical industries. Background technique ...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): A61K36/87A61K8/00
CPCA61K36/87A61K2236/00A61Q19/00A61K2800/10A61K2800/43A61K2800/522A61K8/9789A23L33/105C14C3/12C14C3/08C14C3/00
Inventor 巴卡迪·达尔马塞斯·安娜奥列·奥特罗·路易斯索罗利亚·卡塞利亚斯·西尔维娅卡萨斯·索莱·康塞普西奥
Owner UNIVERSITY OF LLEIDA