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Device and process for continuously producing vitamin C solution by using sodium gulonate as raw material

A technology of sodium coronate and vitamin, applied in the field of VC solution preparation, can solve the problems of numerous hidden dangers, high labor intensity, high risk factor, etc.

Active Publication Date: 2018-11-23
徐翔
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of forming gulonate sodium in this method, ion exchange resin is required to remove sodium as a medium. Ion exchange resin will produce a large amount of acidic and alkaline waste brine during regeneration and resurrection. The generation of this waste water is harmful to the environment. It brings huge processing pressure, and the traditional process uses tank-type devices for intermittent production, which is not only labor-intensive, but also uses up to tens of tons of flammable and explosive methanol solvent in a single tank, which has a huge risk factor and many safety hazards

Method used

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  • Device and process for continuously producing vitamin C solution by using sodium gulonate as raw material

Examples

Experimental program
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Embodiment 1

[0057] The device for the continuous production of vitamin C solution using sodium guronate as raw material described in Example 1 includes sequentially connected sodium removal section, esterification section, conversion section and conversion cooling section; the sodium removal section includes a methanol feed pipe (1 ), automatic weighing feeder (2), beating tank (3), the first sulfuric acid tank (4) and tubular cooling reactor (5); the esterification section includes the second sulfuric acid tank (8) and tubular esterification Reactor (9); conversion section includes NaHCO 3 Tank (10) and tubular synthesis reactor (11); Conversion cooling section comprises the second fully enclosed explosion-proof solid-liquid separator (12), methanol tank (13) and the third sulfuric acid tank (14); A metering pump (24) is connected with the tubular esterification reactor (9) in the esterification section; the esterification section is connected with the tubular synthesis reactor (11) in t...

Embodiment 2

[0065] The process for the continuous production of vitamin C solution using sodium guronate as raw material described in the present embodiment 2 specifically comprises the following steps:

[0066] (1) Under the control of the automatic weighing feeder, the dried sodium guronate is mixed with 99.5% methanol with a weight-to-volume ratio of 1:5 and 40% dilute sulfuric acid trisulfate containing 1 / 2 mole of sodium guronate or mixing and beating, and the pH value is controlled at 2.5.

[0067] (2) Pump the above-mentioned beating liquid into the tubular cooling reactor with a metering pump at a speed consistent with the production capacity requirements of the production line, and then cool it to 5°C through the tubular cooling reactor. After the reaction, the gulong acid solution containing sodium sulfate Sodium sulfate is separated through a fully enclosed explosion-proof solid-liquid separator, and the clear liquid is filtered with a precision filter.

[0068] (3) Pump the f...

Embodiment 3

[0073] The process for the continuous production of vitamin C solution using sodium guronate as raw material described in the present embodiment 3 specifically comprises the following steps:

[0074] (1) Under the control of the automatic weighing feeder, the dried sodium guronate is mixed with 99.5% methanol with a weight-to-volume ratio of 1:8 and 70% dilute sulfuric acid trisulfate containing 1 / 2 mole of sodium guronate or mixing and beating, and the pH value is controlled at 1.5.

[0075] (2) Pump the above-mentioned beating liquid into the tubular cooling reactor with a metering pump at a speed consistent with the production capacity requirements of the production line, and then cool it to 10°C through the tubular cooling reactor. After the reaction, the gulong acid solution containing sodium sulfate Sodium sulfate is separated through a fully enclosed explosion-proof solid-liquid separator, and the clear liquid is filtered with a precision filter.

[0076] (3) Pump the ...

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Abstract

The invention belongs to the technical field of preparation of a vitamin C (VC) solution, in particular relates to a device and a process for continuously producing the VC solution by using sodium gulonate as a raw material. The production device comprises a sodium removal section, an esterification section, a conversion section and a conversion cooling section which are sequentially connected; the sodium removal section comprises a methanol feed pipe, an automatic weighing feeder, a beating tank, a first sulfuric acid tank and a tubular cooling reactor; the conversion section comprises a NaHCO3 tank and a tubular synthesis reactor; the sodium removal section is connected with a tubular esterification reactor in the esterification section by means of a first metering pump; the esterification section is connected with a tubular synthesis reactor in the conversion section by means of a second metering pump; the conversion section is connected with a second fully-enclosed explosion-proofsolid-liquid separator in the conversion cooling section by means of a fourth centrifugal pump. The process of acidifying the sodium gulonate by using dilute sulfuric acid is adopted, the generation of a large amount of acid and alkaline saline water is avoided; furthermore, in the production process, the device adopts the continuous, pipelined and intelligent production process, so that the overall labor intensity is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of VC solution preparation, and in particular relates to a device and process for continuously producing vitamin C solution using sodium guronate as a raw material. Background technique [0002] Vitamin C (VC) is a common nutraceutical. The traditional production process of this drug is to pass sodium guronate through a cation exchange resin and convert it into an aqueous solution of guacic acid, then concentrate and crystallize it to obtain guaronic acid crystals, and then convert gulonate The acid is synthesized through two stages to obtain vitamin C sodium salt, and then the vitamin C solution is obtained through ion exchange. The devices of this traditional process are tank-type devices and batch production method. In the process of forming gulonate sodium in this method, ion exchange resin is required to remove sodium as a medium. Ion exchange resin will produce a large amount of acidic and alkaline wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/62
CPCC07D307/62
Inventor 徐翔徐建涛
Owner 徐翔