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metal5555金蟲 (小有名氣)
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[求助]
[求助]幾小段化工方面的翻譯，請(qǐng)求幫助！
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幾小段化工方面的翻譯，請(qǐng)求幫助！最好是在今天翻譯好！謝謝！ I am glad to hear JR is still considering the consultancy which I strongly recommend based on the process highlights they disclosed. regarding JR process brief description i will convey major comments that I hope will help them to recognize they will have a lot of opportunities to improve their process. My comments will be in red in their process descripton plus some major comment I detail now: a.-Reaction is the core step in the process, and reactants additon, temperature reaction control and other key variabes are key to promote the main reactions and diminish side reactions that affect all the process and of course the quality of the end products. b.-Although formals can be managed a little bit in the reactor they have to be eliminated in an additional step assuming how to managed the by products generated in that step that has to be recycled. More commnets in red down in this mail Formaldehyde mixed with acetaldehyde and gradually adding sodium hydroxide as reactor, Reaction is the main step in Pe process and affects everything downstream. Sodium acts as a catalizer and a reactant in the two main reactions, acetaldehyde in most PE processes is the limitant and Fomraldehyde is managed wi th molar excess. This means that it is better to add gradually the acetaldehyde than caustic. The way this must be done and the way reaction temperature mas be controlled i s key to each chemical reaction within the reactor. High impact can be obtained in Mo PE, DiPE, and other byporducts controllig reation variables neutralize the reaction mixture with formic acid Understood removal impurties by distillation, Evaportation and distillation are key to remove impurities and recovered excess formaldehyde fre o f those impurities, otherwise the reaction is dramatical ly affected. after colling and crystallization, Understood The solution concentrated under vacuum to get sodium formate crystallization and low purity penta, In order to obtain high-purity pentaerythritol,dissolved the low purity penta in hot water,after recrystallization, centrifugation, drying to get final product. ; Understood, but in four different technologies I know it is preffered to manage molar ratios in the raction in order to cristallize frist PE and then by fractionated crystallitazion obtain high purity Formate and low grade PE. ; ;The formals test result is 5-6%. JR is wondering whether your technical method is similar with above method or totally different? Conceptually the method is simmilar but the way the process is organized it is not neccesary the same. I forsee important opportunities for tehir process. Will you control the formals to a low spec by adjust the production mehtod? As i explained in the reactor is defined how different reaction including side reatiojs are driven, but formal will be created anyway. In order to remove formals a special treatment must be done adding specific equipments and assumig that the by products from that treatment has to be recycled to the process in order to keep overall yields under control I hope this explanation is enoug for the time being. I they see these answers I am sure they will realize waht I am talking about. In my perspective they a nice opportunity to imporve their process based on my long term expirience. I know trust is a long process in China, but they have to take a decission to start working or just close the option. I have been very open in this mail in order to encourage them to go. [ 來自科研家族 神龍魚族館 ] |
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metal5555
金蟲 (小有名氣)
- 應(yīng)助: 0 (幼兒園)
- 金幣: 794.6
- 帖子: 220
- 在線: 5.1小時(shí)
- 蟲號(hào): 1417133
- 注冊(cè): 2011-09-25
- 專業(yè): 高分子組裝與超分子結(jié)構(gòu)
8樓2011-10-31 16:54:40
metal5555
金蟲 (小有名氣)
- 應(yīng)助: 0 (幼兒園)
- 金幣: 794.6
- 帖子: 220
- 在線: 5.1小時(shí)
- 蟲號(hào): 1417133
- 注冊(cè): 2011-09-25
- 專業(yè): 高分子組裝與超分子結(jié)構(gòu)
2樓2011-10-31 09:26:12
metal5555
金蟲 (小有名氣)
- 應(yīng)助: 0 (幼兒園)
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- 帖子: 220
- 在線: 5.1小時(shí)
- 蟲號(hào): 1417133
- 注冊(cè): 2011-09-25
- 專業(yè): 高分子組裝與超分子結(jié)構(gòu)
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中間有些單詞拼寫錯(cuò)誤，現(xiàn)在改過來了！ I am glad to hear JR is still considering the consultancy which I strongly recommend based on the process highlights they disclosed. regarding JR process brief description i will convey major comments that I hope will help them to recognize they will have a lot of opportunities to improve their process. My comments will be in red in their process description plus some major comment I detail now: a.-Reaction is the core step in the process, and reactants addition , temperature reaction control and other key varies are key to promote the main reactions and diminish side reactions that affect all the process and of course the quality of the end products. b.-Although formals can be managed a little bit in the reactor they have to be eliminated in an additional step assuming how to managed the by-products generated in that step that has to be recycled. More comments in red down in this mail Formaldehyde mixed with acetaldehyde and gradually adding sodium hydroxide as reactor, Reaction is the main step in Pe process and affects everything downstream. Sodium acts as a catalyzer and a reactant in the two main reactions, acetaldehyde in most PE processes is the limited and formeldehyde is managed with molar excess. This means that it is better to add gradually the acetaldehyde than caustic. The way this must be done and the way reaction temperature must be controlled i s key to each chemical reaction within the reactor. High impact can be obtained in Mo PE, DiPE, and other by-products controlling reaction varies neutralize the reaction mixture with formic acid Understood removal impurities by distillation, Evaportation and distillation are key to remove impurities and recovered excess formaldehyde free of those impurities, otherwise the reaction is dramatically affected. after cooling and crystallization, Understood The solution concentrated under vacuum to get sodium formate crystallization and low purity penta, In order to obtain high-purity pentaerythritol,dissolved the low purity penta in hot water,after recrystallization, centrifugation, drying to get final product. Understood, but in four different technologies I know it is preffered to manage molar ratios in the raction in order to crystallize first PE and then by fractionated crystallitazion obtain high purity Formate and low grade PE. The formals test result is 5-6%. JR is wondering whether your technical method is similar with above method or totally different. Conceptually the method is simmilar but the way the process is organized it is not neccesary the same. I foresee important opportunities for their process. Will you control the formals to a low spec by adjust the production method? As i explained in the reactor is defined how different reaction including side reations are driven, but formal will be created anyway. In order to remove formals a special treatment must be done adding specific equipments and assuming that the by products from that treatment has to be recycled to the process in order to keep overall yields under control I hope this explanation is enough for the time being. I they see these answers I am sure they will realize what I am talking about. In my perspective they a nice opportunity to improve their process based on my long term experience. I know trust is a long process in China, but they have to take a decission to start working or just close the option. I have been very open in this mail in order to encourage them to go. |
3樓2011-10-31 15:20:27
chembibi
銀蟲 (小有名氣)
- 應(yīng)助: 2 (幼兒園)
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- 性別: MM
- 專業(yè): 電能儲(chǔ)存與節(jié)電技術(shù)
【答案】應(yīng)助回帖
metal5555(金幣+10): 謝謝！有人翻譯完了！ 2011-10-31 16:56:08
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前面的是客氣話就不翻譯了哈：進(jìn)入正題~ a.反應(yīng)是一個(gè)流程的核心部分，反應(yīng)物的加料，溫度的反饋控制等一些其他的因素都是促進(jìn)主反應(yīng)，抑制副反應(yīng)發(fā)生的關(guān)鍵，這些都會(huì)影響到整個(gè)流程及最后產(chǎn)品的質(zhì)量。 b.甲醛和乙醛的混合液加入反應(yīng)器，同時(shí)逐滴加入氫氧化鈉。反應(yīng)是聚乙烯流程的關(guān)鍵步驟，會(huì)影響到下游流程。鈉在這兩個(gè)主要反應(yīng)力分別作為催化劑和反應(yīng)物，在大多數(shù)的PE流程中乙醛不能過量，而甲醛是過量的。 |
4樓2011-10-31 16:32:47
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