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Method for treating sodium gluconate solution which is produced via catalytic oxidation method with active carbon

A sodium gluconate, catalytic oxidation technology, applied in the field of sodium gluconate solution, can solve the problems of broken activated carbon, loss, waste of raw materials, etc., and achieve the effect of small loss, simple method and resource saving

Inactive Publication Date: 2018-04-03
青岛九洲千和机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production process, because the equipment used is a circulating jet oxidation kettle, the carrier activated carbon of the catalyst is severely broken, causing the active components of the catalyst, palladium (Pd) and bismuth (Bi), to fall off into the sodium gluconate solution, resulting in sodium gluconate solution The heavy metal content exceeds the standard, and the loss of palladium (Pd) and bismuth (Bi) is serious. According to statistics, the loss rate of palladium (Pd) reaches 35%, and the loss rate of bismuth (Bi) reaches 45%. increase in product cost

Method used

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Experimental program
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Effect test

Embodiment 1

[0015] In concrete implementation, the present invention is realized by the following steps:

[0016] 1. Treatment of activated carbon:

[0017] (1) Soaking charcoal: The method is to soak activated carbon with a particle size of 40-60 mesh in deionized water with a conductivity of ≤40μs / cm, let it stand for 1.5-2.0h, discard the floating objects on the upper layer, and repeat this until the floating objects on the upper layer No longer appear (removal of floating matter), and then the activated carbon is separated from the solution with a centrifugal separator to obtain the activated carbon soaked;

[0018] (2) Charcoal cooking: The method is to add activated carbon to the enamel reactor at a weight ratio of activated carbon to water of 1:3 (i.e. solid-to-liquid ratio of 1:3), stir evenly to form a mixed solution of activated carbon, and then Add nitric acid with a mass concentration of 65%-68% to the activated carbon mixed solution, the amount of nitric acid added is 1-2.0%...

Embodiment 2

[0024] In concrete implementation, the present invention is realized by the following steps:

[0025] 1. Treatment of activated carbon:

[0026] (1) Soaking charcoal: The method is to soak the activated carbon with a particle size of 40-60 mesh in deionized water with a conductivity of ≤40μs / cm, let it stand for 100 minutes, and discard the floating objects on the upper layer. Repeat this until the floating objects on the upper layer no longer appear. (removal of floating matter), then gac is separated from the solution with a centrifugal separator to obtain the gac made of brewing;

[0027] (2) Charcoal cooking: The method is to add activated carbon to the enamel reactor at a weight ratio of activated carbon to water of 1:3 (i.e. solid-to-liquid ratio of 1:3), stir evenly to form a mixed solution of activated carbon, and then Add nitric acid with a mass concentration of 66% in the activated carbon mixed solution, the amount of nitric acid added is 1.5% of the weight of the a...

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Abstract

The invention relates to a method for treating sodium gluconate solution produced by a catalytic oxidation method with activated carbon, which can effectively solve the problem of preventing the loss of palladium and bismuth when the catalytic oxidation method is used to produce sodium gluconate solution, comprising the following steps: processing of activated carbon: using activated carbon Soak in deionized water, let it stand, and discard the floating matter on the upper layer; add the soaked activated carbon and water into the reactor, stir evenly to form a mixed solution of activated carbon, add nitric acid, boil for 4‑5h, and cool down; remove the activated carbon from the mixed solution Separated from the medium, slowly rinse the separated activated carbon with deionized water until the conductivity of the discharged washing liquid is ≤50μs / cm; sodium gluconate solution treatment: add sodium gluconate oxidation solution to the treated activated carbon, start stirring, and heat to 70-80°C, keep warm for 0.5-3.0h, and filter under pressure to obtain clear and transparent sodium gluconate solution and activated carbon. The method of the invention is simple, easy to operate, and the loss of palladium and bismuth is small, saving resources, and it is sodium gluconate Innovation in production.

Description

technical field [0001] The invention relates to chemical industry, in particular to a method for treating sodium gluconate solution produced by catalytic oxidation with active carbon. Background technique [0002] When catalytic oxidation method is produced sodium gluconate solution, what use is Pd (palladium)-Bi (bismuth-C (carbon) catalyzer. In the process of production, owing to use equipment is circulation jet oxidation tank, the carrier active carbon of catalyzer is broken seriously , causing the active components palladium (Pd) and bismuth (Bi) of the catalyst to come off in the sodium gluconate solution, causing the heavy metal content of the sodium gluconate solution to exceed the standard, and the loss of palladium (Pd), bismuth (Bi) is serious, after statistics palladium ( The loss rate of Pd) reaches 35%, and the loss rate of bismuth (Bi) reaches 45%, both causes the waste of raw material, has caused the increase of product cost again.So how to solve to prevent pa...

Claims

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Application Information

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IPC IPC(8): C07C59/105C07C51/235B01J32/00B01J23/44B01J21/18
CPCC07C51/235B01J21/18B01J23/44C07C59/105
Inventor 李辉
Owner 青岛九洲千和机械有限公司