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Method for producing natural tartaric acid from wine leftovers

A technology of wine leftovers and natural tartaric acid, applied in chemical instruments and methods, separation/purification of carboxylic acid compounds, preparation of carboxylate, etc., can solve the problems of complex production process, high cost, long enzymatic hydrolysis time, etc., and achieve Effect of reducing loss, reducing adsorption amount, and enhancing removal effect

Active Publication Date: 2020-12-01
安徽皖晶生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the method for producing tartaric acid is mainly based on enzymatic hydrolysis. The production process of this method is complicated, the enzymatic hydrolysis time is long, and the production cost is relatively high. Purity increased to over 99%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The production process of natural tartaric acid is:

[0032] (1) Crushing the wine scraps, then adding them into pure water at 80°C, then adding sodium carbonate powder until ph=7, stirring for 3 hours, and then filtering to obtain the scraps filtrate;

[0033] (2) Add excessive calcium chloride to above-mentioned leftovers filtrate, filter, obtain primary precipitation, after the primary precipitation is washed three times, vacuum-dry at 20 ℃, obtain calcium tartrate precipitation;

[0034] (3) Add 30kg of calcium tartrate precipitate into 200kg of 1mol / L sulfuric acid solution, heat to 70°C, stir and mix evenly, then filter to obtain secondary precipitate, wash the secondary precipitate three times, filter and wash Combine the solutions, add 10% decolorizing agent activated carbon of the total mass of the solution and heat to 50° C., decolorize for 40 minutes, then filter, evaporate and crystallize the filtrate to obtain first-grade tartaric acid;

[0035] (4) Add wa...

Embodiment 2

[0037] The preparation method of modified activated carbon: add 3kg of activated carbon into 30kg of 0.2mol / L NaOH solution, cook in a closed manner at 100°C for 5 hours, cool to room temperature, wash with water until neutral, and dry in vacuum at 40°C for 8 hours to obtain alkalized activated carbon; Put the alkalized activated carbon in methane gas, absorb methane gas for 2 hours, then take it out and let it stand in the air for 2 minutes, then put it into a muffle furnace and heat it to 800°C for 1 hour under a nitrogen atmosphere, with a heating rate of 10°C / min ( There is no danger of explosion in the process); then lower to room temperature, then pass into the muffle furnace for 2h with ozone gas, and finally, take it out to obtain modified activated carbon.

[0038] The production process of natural tartaric acid is:

[0039] (1) Crushing the wine scraps, then adding them into pure water at 80°C, then adding sodium carbonate powder until ph=7, stirring for 3 hours, and...

Embodiment 3

[0044] The production process of natural tartaric acid is:

[0045] (1) Crushing the wine scraps, then adding them into pure water at 70°C, then adding sodium carbonate powder until ph=7, stirring for 3 hours, and then filtering to obtain the scraps filtrate;

[0046] (2) Add excessive calcium chloride to above-mentioned leftovers filtrate, filter, obtain primary precipitation, after the primary precipitation is washed three times, vacuum-dry at 20 ℃, obtain calcium tartrate precipitation;

[0047] (3) Add 30kg of calcium tartrate precipitate into 200kg of 1mol / L sulfuric acid solution, heat to 70°C, stir and mix evenly, then filter to obtain secondary precipitate, wash the secondary precipitate three times, filter and wash The solutions were combined, and 5% of the total mass of the solution was added with modified activated carbon (the modified activated carbon prepared in Example 2) and heated to 70° C., decolorized for 30 min, then filtered, and the filtrate was evaporated a...

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PUM

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Abstract

The invention discloses a method for producing natural tartaric acid from wine leftovers. The method comprises the following steps: adding crushed wine leftovers into pure water, adding sodium carbonate, stirring, neutralizing, and filtering to obtain a leftover filtrate; adding excessive calcium chloride into the leftover filtrate, filtering to obtain a primary precipitate, washing the primary precipitate with water, and drying to obtain a calcium tartrate precipitate; adding the calcium tartrate precipitate into a dilute sulfuric acid solution, uniformly stirring and mixing, filtering to obtain a secondary precipitate, washing the secondary precipitate with water, combining the filtered and washed solutions, adding a decolorizing agent for decolorizing, and filtering the decolorized solution; filtering to obtain filtrate; evaporating and crystallizing the filtrate to obtain primary tartaric acid; recrystallizing the primary tartaric acid, and drying to obtain natural tartaric acid; according to the method, the defects in the prior art are overcome, the process steps are few, the production process is simple, the raw material cost is low, and the purity of the produced natural tartaric acid is larger than 99.8%.

Description

technical field [0001] The invention relates to the technical field of production of natural tartaric acid, in particular to a method for producing natural tartaric acid by using wine leftovers. Background technique [0002] Tartaric acid is a kind of dihydroxysuccinic acid, which exists in plants such as grapes and tamarind, and is also one of the main organic acids in wine. Professional interpretation: tartaric acid has three chemical isomers, namely L(+)-tartaric acid (dextrorotatory), D(-)-tartaric acid (levorotatory) and Meso-tartaric acid (meso). Usually the tartaric acid obtained by chemical synthesis is DL-tartaric acid (racemic) with dextrorotation and L-rotation each accounting for 50%; L(+)-tartaric acid is a natural configuration, also known as D-tartaric acid, which is widely present in many Plants such as grapes and tamarind. D(-)-tartaric acid is found in the fruit and leaves of the goosefoot, and it is also known as l-tartaric acid. L(+)-tartaric acid and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/02C07C51/41C07C51/42C07C51/43C07C51/47C07C51/487C07C59/255B01J20/20C01B32/354
CPCC07C51/02C07C51/412C07C51/42C07C51/43C07C51/47C07C51/487B01J20/20C01B32/354C07C59/255
Inventor 饶丽英金伟
Owner 安徽皖晶生物科技有限公司
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