The experimental method is actually very simple, the prepared rare earth concentrate and concentrated sulfuric acid are stirred evenly and reacted in proportion, and then put into the muffle furnace for roasting for a period of time.

The obtained roasted ore is water-leached according to a certain solid-liquid ratio (solid-liquid ratio) and time, and the rare earth and thorium content in the water leaching solution and slag are analyzed, and then the leaching rate and the residual rate of rare earth and thorium in the slag are calculated.

Once you have this data, you need to start analyzing it.

For the rare earths in the data, EDTA volumetric and gravimetric methods were used, while thorium was detected by plasma mass spectrometry.

Then, through the selection of the mineral-acid ratio, the determination of the roasting temperature, the influence of the roasting time, and the radioactivity of the water leaching slag, the most suitable low-temperature roasting and decomposition process of sulfuric acid suitable for local rare earth concentrate can be finally obtained.

Before the experiment, the value is not fixed, for example, the range of 150 degrees Celsius ~ 300 degrees Celsius mentioned by Zhong Bai before is only an approximate range, but after a complete experimental link, it can be shortened to a range such as 180 degrees Celsius ~ 250 degrees Celsius and so on.

The more accurate the data, the more accurate the pollution content of the waste discharged in the later stage will be to a certain value, until the final goal is finally achieved - the pollution data is lower than the national or European Community requirements, and if it can be reduced to this extent, it is equivalent to fundamentally solving the messy problem of piling up waste and paying treatment fees.

Although it is known as "low temperature", in fact, the temperature of the whole workshop is still quite hot, fortunately, the Baiyun Obo mining area is a typical morning and evening temperature is frighteningly low, and it is slightly more comfortable to do this kind of experiment in winter.

"Well, let's get here tonight." Xu Guang first looked at the time, and it was already ten o'clock in the evening, and then said to the students who were already tired and a little deformed: "Summarize some of the problems encountered in the experiment today, continue the experiment at eight o'clock tomorrow morning, and everyone should make a brief summary of today's data analysis report tomorrow morning, um...... No more than 3 minutes per person is good. Rest early! ”

Rub, you have assigned so many homework after class, how can this Nima make people "rest early"?

Of course, everyone's complaints are in their hearts, and they can only nod obediently and leave.

The schedule of the first few days was so leisurely that he could only go to play basketball compared to today's tiring arrangement, it was undoubtedly one heaven and one underground, but for Zhong Bai, it was extremely exciting.

Today's experiment is much smoother than expected, on the one hand, because Xu Guangxian kept communicating with himself two days ago, and on the other hand, it is also because Yu Dongfeng added money when buying equipment, these extra payments are obviously useful, each factory is to transport their best quality products here, as far as possible to avoid data deviations caused by the quality of the equipment itself.

……

Back in the room, Xu Guangxian lit a cigarette and sat on the sofa, without any sleep, but his heart was unconsciously and inexplicably excited.

Judging from tonight's experiments, the data is undoubtedly gratifying, and the conclusions obtained are roughly similar to the functional data of the plane curve diagram provided by Zhong Bai after using only three different sets of mineral-acid ratio experiments.

It seems that this is indeed something that the French have come up with after an unknown amount of time.

After an afternoon of communication, Xu Guangxian was not so resistant to registering a personal patent, but he really hadn't been exposed to this process.

Go and ask Zhong Bai, but it seems that he, an old pedant, is a little too impatient, after all, he is thin-skinned, and he didn't think to call Zhong Bai to the room to ask at this time.

Just as the old academician was pondering, there was a knock on the door.

"Who?"

"Hello Academician Xu, I'm Xiaoyu, Yu Dongfeng."

As soon as he heard that it was Yu Dongfeng, Xu Guangxian immediately got up and opened the door: "Please come in." ”

"It's so late to disturb your rest."

"Where." Xu Guangxian pointed to the pile of manuscripts on the table and said with a smile: "I'm still summing up, and I'm still a little bit away from sleeping." Is there anything going on with Xiao Yu coming over now? ”

"That's the case...... Yu Dongfeng closed the door and said with a smile: "When we talked about registering patents in the afternoon, I contacted the Swiss Patent Office by the way, and they expressed their interest and told me ......"

"From what they know so far, the French have no plans to register patents in this area during the year."

The second half of Yu Dongfeng's words was obviously the point, and hearing this, Xu Guangxian's body couldn't help but tremble!

There is really hope!

"Really? The French would have given up on preemptively registering patents?! Still in disbelief, he asked rhetorically.

Yu Dongfeng replied affirmatively: "How can this be called giving up the preemptive registration of patents?" Now there is no one to mature this technology at all, whoever comes out with the results first, who registers first, that is whose patent! ”

"Whoever registers first is whose patent ......" Xu Guangxian pondered while repeating Yu Dongfeng's words in a whisper.

These words were actually what Zhong Bai wanted to tell Xu Guangxian, but he knew that he had already said so many shocking views today, and if he personally persuaded Academician Xu in the evening, I am afraid it would be counterproductive.

Therefore, under Zhong Bai's face-to-face teaching, this lobbyist became Yu Dongfeng.

And judging from the current reaction, the effect is not bad.

"I also have a list of materials required to register a patent, so you can go through it first." Yu Dongfeng unhurriedly took out the things he had prepared for the afternoon.

This is taking advantage of the gap between them to install the equipment in the afternoon, Yu Dongfeng went to the factory office to ask Xu Xiuxiu to fax it from the group, after all, he also applied for the company's patent in his own name last time, so Yu Dongfeng is now more familiar with the process of this piece.

As for the phone call at the Swiss Patent Office, there is a relationship between Zhong Bai and Deputy Director Alden, and I am afraid that I will not be able to find out some inside information? In addition, the patent sales dividends of European companies registered here also have the share of the Swiss Patent Office and Deputy Director Alden, and it is not an exaggeration to say that Deputy Director Alden is equal to the existence of the director of the Bern office of Baifeng Group!

Xu Guangxian put on reading glasses and looked through it carefully, his foreign language ability was beyond doubt, the original version looked effortless, and he couldn't help but admire the Swiss for pursuing rigorous and binding regulations.

When will these be available in China? Xu Guangxian didn't dare to think that it was already beyond the level of the rare earth industry and rose to the height of intellectual property protection.

"I can't finish reading these materials for a while, Xiaoyu, if it's convenient for you, can you borrow me to read it for a few more days?" Xu Guangxian came up after all, and after looking at it for a while, he found that his eyes were a little dry, so he took off his glasses and asked Yu Dongfeng.

"No problem. Then I won't disturb your rest. When Yu Dongfeng got up, he said again: "By the way, I have asked the finance side to prepare 10,000 yuan in the name of the group for the funds for the training class on your side, and I will be able to wire it over tomorrow." ”