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

　　催化氧化反应结束后滤除催化剂，过滤液然后进行精制。

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

　　有机溶剂通常可用酰胺、脂肪醇类、醚类、酯类等化合物，催化剂通常用金属钯，载体为活性，也可以用钯合金作为催化剂。

　　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.

　　这种工艺主要是催化氧化时采用金属钯以及钯合金多元金属催化剂，在糖溶液中预热到45℃，进行喷射泵循环氧化；

　　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下降时，可以添加40％的氢氧化钠溶液，控制好流加的碱液速率，保持pH在9.0～9.5，温度范围45～50℃，当pH达到8.0，残余葡萄糖量降低到1.0％以下时，8～10h反应结束。

　　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.

　　结束后分离催化剂，精制过滤，用阳离子树脂进行交换，再用氧化钙或氢氧化钙中和而成。

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

　　金属催化法制取葡萄糖酸钠的工艺特点：

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

　　利用葡萄糖溶液金属催化，工艺简单，能够一步合成葡萄糖酸盐(钠或钙)，但是此种工艺受金属催化剂的制约，包括催化剂的以及催化剂的使用寿命和成本，产品的纯度等。

　　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，产品的转化率还受到通氧、温度、pH、搅拌以及催化剂质量的影响，而且催化氧化反应必须在专门的反应设备中进行。

　　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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　　This article is published by http://www.jinhao360.com