Metal catalysis can produce sodium gluconate, calcium gluconate and other products. The production process is as follows:

　　催化氧化反應(yīng)結(jié)束后濾除催化劑，過(guò)濾液然后進(jìn)行精制。

　　After the catalytic oxidation, the catalyst is filtered out, and the filtrate is refined.

　　有機(jī)溶劑通常可用酰胺、脂肪醇類、醚類、酯類等化合物，催化劑通常用金屬鈀，載體為活性，也可以用鈀合金作為催化劑。

　　Organic solvents can be used as amides, aliphatic alcohols, ethers, esters and other compounds. Palladium metal is usually used as catalyst, and palladium alloy can also be used as catalyst.

　　這種工藝主要是催化氧化時(shí)采用金屬鈀以及鈀合金多元金屬催化劑，在糖溶液中預(yù)熱到45℃，進(jìn)行噴射泵循環(huán)氧化；

　　In this process, PD and Pd alloy multi metal catalysts are used for catalytic oxidation, which are preheated to 45 ℃ in sugar solution for jet pump circulating oxidation;

　　等到溶液pH下降時(shí)，可以添加40％的氫氧化鈉溶液，控制好流加的堿液速率，保持pH在9.0～9.5，溫度范圍45～50℃，當(dāng)pH達(dá)到8.0，殘余葡萄糖量降低到1.0％以下時(shí)，8～10h反應(yīng)結(jié)束。

　　When the pH of the solution drops, 40% sodium hydroxide solution can be added to control the rate of the flow alkali solution, keep the pH at 9.0-9.5, and the temperature range at 45-50 ℃. When the pH reaches 8.0 and the amount of residual glucose drops below 1.0%, the 8-10h reaction ends.

　　結(jié)束后分離催化劑，精制過(guò)濾，用陽(yáng)離子樹(shù)脂進(jìn)行交換，再用氧化鈣或氫氧化鈣中和而成。

　　After that, the catalyst is separated, refined and filtered, exchanged with cation resin, and neutralized with calcium oxide or calcium hydroxide.

　　金屬催化法制取葡萄糖酸鈉的工藝特點(diǎn)：

　　The technological characteristics of the preparation of sodium gluconate by metal catalysis are as follows:

　　利用葡萄糖溶液金屬催化，工藝簡(jiǎn)單，能夠一步合成葡萄糖酸鹽(鈉或鈣)，但是此種工藝受金屬催化劑的制約，包括催化劑的以及催化劑的使用壽命和成本，產(chǎn)品的純度等。

　　Using the metal catalyst of glucose solution, the process is simple and can synthesize gluconate (sodium or calcium) in one step, but this process is restricted by the metal catalyst, including the price of the catalyst, the service life and cost of the catalyst, the purity of the product, etc.

　　另外，產(chǎn)品的轉(zhuǎn)化率還受到通氧、溫度、pH、攪拌以及催化劑質(zhì)量的影響，而且催化氧化反應(yīng)必須在專門的反應(yīng)設(shè)備中進(jìn)行。

　　In addition, the conversion rate of the product is also affected by oxygen, temperature, pH, agitation and catalyst quality, and catalytic oxidation must be carried out in a special reaction equipment.

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