CN105495069A - Preparation method of citric acid - Google Patents
Preparation method of citric acid Download PDFInfo
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- CN105495069A CN105495069A CN201410590425.2A CN201410590425A CN105495069A CN 105495069 A CN105495069 A CN 105495069A CN 201410590425 A CN201410590425 A CN 201410590425A CN 105495069 A CN105495069 A CN 105495069A
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- citric acid
- calcium citrate
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- salt
- drying
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Abstract
The present invention relates to a preparation method of citric acid. Raw materials selected for preparing the citric acid are oranges, and the citric acid is prepared by carrying out juice squeezing, salt precipitating, ethanol dissolving, distilling and drying. The salt precipitating is carried out by heating orange juice to 75-85 DEG C, adding excess saturated solution of calcium chloride into the heated orange juice, filtering the mixture to obtain calcium citrate precipitate, and washing the calcium citrate precipitate with hot water for 3-5 times; the ethanol dissolving is carried out by putting the calcium citrate into a reactor equipped with a stirrer, adding concentrated sulfuric acid (0.3-0.6 times mass of the calcium citrate) into the reactor, stirring the mixture into paste, then adding ethanol into the paste, and carrying out a reaction for 3-5 hours while continuously stirring the ethanol treated paste; the distillation temperature is 80-85 DEG C; and the drying temperature is 60-70 DEG C; and the drying time is 1-3 hours. The method provided by the invention is short in process flow, less in equipment investment, and easy to operate.
Description
Technical field
The present invention relates to a kind of agricultural byproducts processing technology, be specifically related to a kind of citric acid preparation method.
Background technology
Citric acid has gentle frank tart flavour, is commonly used to the manufacture of the food such as various beverage, carbonated drink, grape wine, candy, dessert, biscuit, canned fruit juice, dairy products.In all organic acid market, citric acid occupation rate of market more than 70%, flavor enhancement, also can be used as the antioxidant of edible oil.Improve the sensory properties of food simultaneously, whet the appetite and promote digesting and assimilating of calcium in body, phosphorus substance.Anhydrous citric acid is in a large number for solid beverage.Salt such as calcium citrate and the ironic citrate of citric acid are the hardening agents needing to add calcium ion and iron ion in some food.Ester class such as the triethyl citrate of citric acid can make nontoxic plasticizer, and manufacturing food packaging plastic sheeting, is the acid of drink and food industry, anticorrisive agent.
The traditional production method of citric acid is fermentation method, and fermentation has solid state fermentation, liquid shallow tray fermentation and submerged fermentation 3 kinds of methods.Solid state fermentation is with potato dry powder, the starch dregs of rice and amyloid agricultural byproducts for raw material, and after preparing culture medium, boiling at ambient pressure, is cooled to inoculation temperature, and access kind of song, loads koji tray, at uniform temperature and damp condition bottom fermentation.
Summary of the invention
Technical problem to be solved by this invention is for the deficiencies in the prior art, provide a kind of newly, citric acid preparation method that method design is reasonable, easy to operate.
Technical problem to be solved by this invention is realized by following technical scheme.The present invention is a kind of citric acid preparation method, is characterized in: raw materials used for orange, and through squeezing the juice, salt is heavy, alcohol is molten, distillation, drying form; Salt is heavy is that orange juice is heated to 75-85 DEG C, adds excessive calcium chloride saturated solution, filters, is precipitated as calcium citrate, with hot wash 3-5 time; Alcohol is molten is reactor calcium citrate being put into band agitating device, adds the concentrated sulfuric acid of calcium citrate 0.3-0.6 times quality, stirs into pasty state, then add ethanol, continuous stirring reaction 3-5 hour; Vapo(u)rizing temperature is 80-85 DEG C; Baking temperature is 60-70 DEG C, and drying time is 1-3 hour.
Citric acid preparation method of the present invention, further: salt is heavy is that orange juice is heated to 80 DEG C, adds excessive calcium chloride saturated solution, filters, is precipitated as calcium citrate, with hot wash 4 times.
Citric acid preparation method of the present invention, further: alcohol is molten is reactor calcium citrate being put into band agitating device, adds the concentrated sulfuric acid of calcium citrate 0.5 times of quality, stirs into pasty state, then add ethanol, continuous stirring reaction 4 hours.
Citric acid preparation method of the present invention, further: vapo(u)rizing temperature is 82 DEG C; Baking temperature is 65 DEG C, and drying time is 2 hours.
Compared with prior art, present invention process flow process is short, and equipment investment is few, easily operates.
Detailed description of the invention
Below further describe concrete technical scheme of the present invention, so that those skilled in the art understands the present invention further, and do not form the restriction to its right.
Embodiment 1, a kind of citric acid preparation method, raw materials used is orange, and through squeezing the juice, salt is heavy, alcohol is molten, distillation, drying form; Salt is heavy is that orange juice is heated to 75-85 DEG C, adds excessive calcium chloride saturated solution, filters, is precipitated as calcium citrate, with hot wash 3-5 time; Alcohol is molten is reactor calcium citrate being put into band agitating device, adds the concentrated sulfuric acid of calcium citrate 0.3-0.6 times quality, stirs into pasty state, then add ethanol, continuous stirring reaction 3-5 hour; Vapo(u)rizing temperature is 80-85 DEG C; Baking temperature is 60-70 DEG C, and drying time is 1-3 hour.
Embodiment 2, in the citric acid preparation method described in embodiment 1: salt is heavy is that orange juice is heated to 80 DEG C, adds excessive calcium chloride saturated solution, filters, is precipitated as calcium citrate, with hot wash 4 times.
Embodiment 3, in the citric acid preparation method described in embodiment 1: alcohol is molten is reactor calcium citrate being put into band agitating device, adds the concentrated sulfuric acid of calcium citrate 0.5 times of quality, stirs into pasty state, then add ethanol, continuous stirring reaction 4 hours.
Embodiment 4, in the citric acid preparation method described in embodiment 1: vapo(u)rizing temperature is 82 DEG C; Baking temperature is 65 DEG C, and drying time is 2 hours.
Embodiment 5, citric acid preparation method tests:
1, squeeze the juice.Select without disease and pest, without the orange gone mouldy, clean up with water, squeeze the juice, filter, remove filter residue, retain orange juice for subsequent use;
2, salt sinks.Orange juice is heated to 80 DEG C, adds excessive calcium chloride saturated solution, filter, be precipitated as calcium citrate, with hot wash 4 times;
3, alcohol is molten.Calcium citrate is put into the reactor of band agitating device, add the concentrated sulfuric acid of calcium citrate 0.5 times of quality, stir into pasty state, then add ethanol, continuous stirring reaction 4 hours, filter;
4, distill.Filtrate distilled with distiller, temperature is 82 DEG C, and the ethanol collecting condensation continues to use, and crystal is citric acid;
5, dry.Citric acid is placed in drying box and carries out drying, baking temperature is 65 DEG C, and drying time is 2 hours.
Claims (4)
1. a citric acid preparation method, is characterized in that: raw materials used for orange, and through squeezing the juice, salt is heavy, alcohol is molten, distillation, drying form; Salt is heavy is that orange juice is heated to 75-85 DEG C, adds excessive calcium chloride saturated solution, filters, is precipitated as calcium citrate, with hot wash 3-5 time; Alcohol is molten is reactor calcium citrate being put into band agitating device, adds the concentrated sulfuric acid of calcium citrate 0.3-0.6 times quality, stirs into pasty state, then add ethanol, continuous stirring reaction 3-5 hour; Vapo(u)rizing temperature is 80-85 DEG C; Baking temperature is 60-70 DEG C, and drying time is 1-3 hour.
2. citric acid preparation method according to claim 1, is characterized in that: salt is heavy is that orange juice is heated to 80 DEG C, adds excessive calcium chloride saturated solution, filters, is precipitated as calcium citrate, with hot wash 4 times.
3. citric acid preparation method according to claim 1, it is characterized in that: alcohol is molten is reactor calcium citrate being put into band agitating device, adds the concentrated sulfuric acid of calcium citrate 0.5 times of quality, stirs into pasty state, add ethanol again, continuous stirring reaction 4 hours.
4. citric acid preparation method according to claim 1, is characterized in that: vapo(u)rizing temperature is 82 DEG C; Baking temperature is 65 DEG C, and drying time is 2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410590425.2A CN105495069A (en) | 2014-10-29 | 2014-10-29 | Preparation method of citric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410590425.2A CN105495069A (en) | 2014-10-29 | 2014-10-29 | Preparation method of citric acid |
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| Publication Number | Publication Date |
|---|---|
| CN105495069A true CN105495069A (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410590425.2A Withdrawn CN105495069A (en) | 2014-10-29 | 2014-10-29 | Preparation method of citric acid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112047833A (en) * | 2019-06-05 | 2020-12-08 | 上海固钛实业有限公司 | Preparation method of citric acid |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101117315A (en) * | 2007-07-10 | 2008-02-06 | 安徽丰原生物化学股份有限公司 | Production method of lemon acid |
| CN101607890A (en) * | 2008-06-17 | 2009-12-23 | 安徽丰原发酵技术工程研究有限公司 | A kind of citric acid continuously in and extracting method |
| CN101698640A (en) * | 2009-06-22 | 2010-04-28 | 安徽丰原生物化学股份有限公司 | Method for extracting citric acid |
| CN102336651A (en) * | 2010-07-17 | 2012-02-01 | 耿庆水 | Citric acid and its preparation method |
-
2014
- 2014-10-29 CN CN201410590425.2A patent/CN105495069A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101117315A (en) * | 2007-07-10 | 2008-02-06 | 安徽丰原生物化学股份有限公司 | Production method of lemon acid |
| CN101607890A (en) * | 2008-06-17 | 2009-12-23 | 安徽丰原发酵技术工程研究有限公司 | A kind of citric acid continuously in and extracting method |
| CN101698640A (en) * | 2009-06-22 | 2010-04-28 | 安徽丰原生物化学股份有限公司 | Method for extracting citric acid |
| CN102336651A (en) * | 2010-07-17 | 2012-02-01 | 耿庆水 | Citric acid and its preparation method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112047833A (en) * | 2019-06-05 | 2020-12-08 | 上海固钛实业有限公司 | Preparation method of citric acid |
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Application publication date: 20160420 |
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