Bipolar membrane device for producing gluconic acid

Abstract

The invention discloses a mechanical device, and in particular relates to a device for producing gluconic acid. The device comprises a clamping steel plate, a polar liquid flow channel plate, a platinum electrode, a bipolar membrane, an elastic partition plate, a hydroxyl difficult penetrating homogeneous phase cationic membrane, and the like, wherein the electrode adopts a titanium alloy or platinum electrode with higher efficiency; an elastic coating is coated on the elastic partition plate for sealing; a material liquid inlet, a material liquid outlet, a sodium hydroxide liquid outlet and a sodium hydroxide inlet are arranged on the clamping steel plate, which is beneficial to the safety in the transportation process; and a liquid guide hole is improved and adopts an elliptic liquid guide hole. The invention has the advantages of high yield, no pollution, low running cost, convenience for transportation, and the like and can be widely applied to a glucose producing enterprise.

Description

technical field [0001] The invention relates to a mechanical device, in particular to a device for producing gluconic acid. technical background [0002] Gluconic acid derivatives are substances obtained from gluconic acid through a certain chemical reaction. Gluconic acid derivatives such as zinc gluconate, ferrous gluconate, copper gluconate, glucono-δ-lactone, etc. are a class of valuable products that are completely harmless to the human body, effective, safe and necessary food additives and nutritional supplements. The main products of its derivatives have been widely used in industrial fields such as medicine, food, chemical industry and construction. [0003] In the past 20 years, the development and application of gluconic acid derivatives in my country has achieved remarkable results. The development of products is getting faster and faster, and a large number of products have gone abroad. At present, domestic gluconic acid derivatives have developed from a relat...

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Problems solved by technology

At present, if the bipolar membrane device used in domestic laboratory tests is directly enlarged, there will be: 1. The operating current density is too small, generally not greater than 400A / m 2 , it is impossible to use high current to operate, so that the membrane area of ​​the device with the same processing capacity is too large; 2. The solutions in the material liquid chamber and the sodium hydroxide chamber leak through each other, resulting in too low current efficiency, low conversion rate of grape acid products, and low hydrogen oxidation. The concentration of the sodium solution is too low, the energy consumption is too large and other shortcomings; 3. It is difficult for the suitable hydroxide to pass through the homogeneous positive membrane, so that the concentration of the sodium hydroxide solution cannot be increased, and the sodium hydroxide can pass through the positive membrane and The re-neutralization of the generated gluconic acid makes the operation efficiency low; 4. The separators selected are only suitable for heterogeneous membranes, and are directly used in bipolar membrane devices, which will cause internal leakage and external leakage; 5. The loss of gluconic acid is too high, and the gluconate radicals Will permeate the bipolar membrane or anodic membrane to the sodium hydroxide chamber, resulting in the loss of gluconic acid

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