草酸的運(yùn)用廣泛，那么草酸的工業(yè)生產(chǎn)方法有哪些？其實(shí)在工業(yè)化生產(chǎn)辦法上主要有：甲酸鈉法、氧化法、羰基合成法、乙二醇氧化法、丙烯氧化法、一氧化碳偶聯(lián)法。下面就讓氫氧化鉀廠家為您詳細(xì)解答吧。

Oxalic acid is widely used. What are the industrial production methods of oxalic acid? In fact, industrial production methods mainly include: sodium formate method, oxidation method, carbonyl synthesis method, ethylene glycol oxidation method, propylene oxidation method, carbon monoxide coupling method. Now let the potassium hydroxide manufacturer give you a detailed answer.

它一般是無(wú)色透明結(jié)晶，對(duì)人體有害，會(huì)使人體內(nèi)的酸堿度失去平衡，影響兒童的發(fā)育，草酸在工業(yè)中有重要作用，草酸可以除銹。草酸遍布于自然界，常以草酸鹽形式存在于植物如伏牛花、羊蹄草、酢漿草和酸模草的細(xì)胞膜，幾乎所有的植物都含有草酸鹽。

It is generally colorless and transparent crystal, which is harmful to human body. It will cause the pH in human body to lose balance and affect the development of children. Oxalic acid plays an important role in industry, and oxalic acid can remove rust. Oxalic acid is widely distributed in nature and often exists in the cell membrane of plants such as cowhide, Leymus chinensis, Oxalis and Rumex in the form of oxalate. Almost all plants contain oxalate.

1.甲酸鈉法：一氧化碳凈化后在加壓狀況下與氫氧化鈉反響，生成甲酸鈉，然后經(jīng)高溫脫氫生成草酸鈉，草酸鈉再經(jīng)鉛化(或鈣化)、酸化、結(jié)晶和脫水枯燥等工序，得到廢品草酸。一氧化碳與氫氧化鈉合成壓力普通為1.8-2.0MPa。脫氫溫度為400℃。

1. Sodium formate method: after purification of carbon monoxide, it reacts with sodium hydroxide under pressure to generate sodium formate, and then dehydrogenated at high temperature to generate sodium oxalate, which is then lead (or calcified), acidified, crystallized and dehydrated to obtain waste oxalic acid. The synthetic pressure of carbon monoxide and sodium hydroxide is generally 1.8-2.0mpa. Dehydrogenation temperature is 400 ℃.

2.氧化法：以淀粉或葡萄糖母液為原料，在礬觸媒存在下，與硝酸-硫酸停止氧化反響得草酸。廢氣中的氧化氮送吸收塔回收生成稀硝酸。

2. Oxidation method: take starch or glucose mother liquor as raw material, in the presence of alum catalyst, stop oxidation reaction with nitric acid sulfuric acid to obtain oxalic acid. The nitrogen oxide in the waste gas is sent to the absorption tower for recovery to generate dilute nitric acid.

3.羰基合成法：一氧化碳經(jīng)提純到90%以上，在鈀催化劑存在下與丁醇發(fā)作羰基化反響，生成草酸二丁酯，然后經(jīng)過(guò)水解得到草酸，此法分為液相法和氣相法兩種，氣相法反響條件較低，反響壓力為300-400kPa。而液相法反響壓力為13.0-15.0MPa。

3. Carbonyl synthesis method: carbon monoxide is purified to more than 90% and reacts with butanol in the presence of palladium catalyst to produce dibutyl oxalate, which is then hydrolyzed to oxalic acid. This method is divided into liquid-phase method and gas-phase method. The reaction condition of gas-phase method is low, and the reaction pressure is 300-400kpa. The reaction pressure of liquid phase method is 13.0-15.0mpa.

4.乙二醇氧化法：以乙二醇為原料，在硝酸和硫酸存在下，用空氣氧化而得。

4. Ethylene glycol oxidation method: ethylene glycol is obtained by air oxidation in the presence of nitric acid and sulfuric acid.

5.丙烯氧化法：氧化過(guò)程分兩步停止。步用硝酸氧化，使丙烯轉(zhuǎn)化為α-硝基乳酸;然后進(jìn)一步催化氧化得到草酸。二步也可采用混酸為氧化劑。丙烯氧化法消費(fèi)工業(yè)級(jí)草酸二水化合物，以丙烯計(jì)總收率大于90%。

5. Propylene oxidation method: the oxidation process is stopped in two steps. In this step, nitric acid is used for oxidation to convert propylene into α- Nitrolactic acid; Then, oxalic acid is obtained by further catalytic oxidation. Mixed acid can also be used as oxidant in the second step. Industrial grade oxalic acid dihydrate is consumed by propylene oxidation method, and the total yield is more than 90% based on propylene.

因?yàn)椴菟嵩谌梭w內(nèi)不容易被氧化分解掉，經(jīng)代謝作用后形成的產(chǎn)物，屬于酸性物質(zhì)，可導(dǎo)致人體內(nèi)酸堿度失去平衡，吃得過(guò)多還會(huì)中毒。所以說(shuō)您不得不接觸的草酸時(shí)要做好防護(hù)準(zhǔn)備。更多咨詢(xún)就來(lái)我們網(wǎng)站http://www.fahao168.com看看吧。

Because oxalic acid is not easy to be oxidized and decomposed in the human body, the product formed after metabolism belongs to acidic substances, which can lead to the imbalance of pH in the human body and poisoning if you eat too much. Therefore, you should be prepared for safety protection when you have to contact oxalic acid. Come to our website for more information http://www.fahao168.com Take a look.