[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-324749-105":59,"doc-detail-324749-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","a-process-for-the-manufacture-of-acetone-cyanhydrin","A Process for the Manufacture of Acetone Cyanhydrin","","A refined process for manufacturing acetone cyanohydrin is provided, based on reacting hydrocyanic acid with acetone in the presence of an alkali catalyst, neutralizing the acid, and then performing a controlled distillation sequence. The method controls water/moisture in the reaction liquid and withdraws hydrocyanic acid and acetone below specified column-bottom temperatures. Vacuum operation at pressures from 10 to 70 Torr is used to suppress rapid decomposition and manage freezing concerns related to hydrocyanic acid.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/a-process-for-the-manufacture-of-acetone-cyanhydrin/324749/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/a-process-for-the-manufacture-of-acetone-cyanhydrin/324749.png","ImageObject",300,407,{"name":92,"@type":93},"Riley","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-04","2026-09-21",true,{"@type":102,"interactionType":103,"userInteractionCount":52},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What reaction is used to produce acetone cyanohydrin in the claimed process?","Question",{"text":112,"@type":113},"Hydrocyanic acid and acetone are reacted together in the presence of an alkali catalyst.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does the method address decomposition during distillation?",{"text":117,"@type":113},"It maintains column-bottom temperatures below 110°C and uses vacuum conditions so decomposition of acetone cyanohydrin is prevented.",{"name":119,"@type":110,"acceptedAnswer":120},"What operational ranges are specified for the second-stage distillation?",{"text":121,"@type":113},"The second stage is operated at pressures from 10 to 70 Torr with a column-bottom temperature below 110°C while withdrawing and separating hydrocyanic acid and acetone from water/moisture.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},324749,1790710363,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":52,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145,"preview_page_count":4},1374391975076,"https://ap-avatar.wpscdn.com/avatar/14000253ca4ec9f6853?x-image-process=image/resize,m_fixed,w_180,h_180&k=1783305029341752051","# A process for the manufacture of acetone cyanhydrin.16 p.\n\nPatent (Japanese)No.57-18655(1982).FILED:   TRANSLATION NO.4860.  \naeotu~yrawo hycliC nuwJMaleuu2edLttomofost memethacrylatekeu20l-七mcuoel。fsamee eop2  \nTranslator's Note:  Many characters were obliterated in the copyingof the origina1.  Hence,exact translation can-not be guaranteed.  Where this condition exists,a note is made:  characters obscured.  \nJapanese Patent No.57-18655  \n# \"A Process for the Manufacture of Acetone Cyanhydrin\"\n\n## 1.  Title of the Invention\n\nA process for the manufacture of acetone cyanhydrin.  \n## 2.Limits of the Patent Claims\n\nA process for the manufacture of refined acetone cyanhydrincharacterized by the fact that hydrocyanic acid and acetone arereacted together in the presence of an alkali catalyst,the acid inthe reaction liquid is neutralized and then refined by means of adistillation procedure,the water in the reaction liquid is ad just-ed(=controlled)and the moisture in the column bottom liquid(=sump?)is 2 to 10%by weight,and it is subjected to a one-stagedistillation below a column bottom temperature of 110c and the hy-drocyanic and as wel1 as acetone are withdrawn,and separated fromthe water(=moisture)by a distillation as the second stage whichis operated at pressures from 10 to 70 Torr and a column bottomtemperature below 110c.  \n## 3.  A detailed Description of the Invention\n\nThis invention is concerned with the process for the manufactureof acetone cyanhydrin which has a high degree of purity and whichis obtained by the reaction of hydrocyamic acid and acetone and the  \nDigitized by the Internet Archivein 2019  \nhttps://archive.org/details/processformanufa00unse  \n—2—  \nacetone cyanhydrin reaction liquid is treated to give the above.  \nIn genera1,with regard to the method for synthesizing acetonecyanhydrin from hydrocyanic acid and acetone,up to now,in orderto swing the equilibrium condition there were means in the reactionfor the application of an a1kaline catalyst,and this alkalinecatalyst that was contained in the reaction liquid was neutralized,and subsequent1y there was a procedure for the separationa1 remova1of the salts that were formed,and then afterwards the unreactedhydrocyamic acid as wel1 as unreacted acetone were collected bymeans of a distillation operation;furthermore,the acetone cyanhy-drin thus obtained was refined by means of a fractionating distilla-tion for the remova1 of the water that was formed by means of theneutralization of the alkaline catalyst Is wel1 as the water thatwas introduced into the reaction system,which contained the alka-line catalyst as wel1 as the acetone and hydrocyamic acid startingmaterials.  \nFurthermore,with regard to distillation column concerning theunreacted acetone as wel1 as unreacted hydrocyamic acid were collect-ed from this reaction liquid,since there is a large difference be-tween the boiling point of the acetone cyanhydrin in the liquidwhich condensed in the column bottom and the boiling point of theacetone and the hydrocyamic acid that is collected,the temperaturedifference in the head of the column is not necessarily large.  More-over,if there is a temperature in the bottom of the column or forthat matter if the temperature of the acetone cyanhydrin exceeds  \n—3—  \n110c,there are conditions for a rapid decomposition of the acetonecyanhydrin,and it is then necessary to prevent this by maintaininga temperature below this point by using a vacuum system;and thisapplies to the,concentrating vessel of the distillation column aswell,and it is necessary to maintain the concentration of the hy-drocyanic acid and the acetone at a low vapor pressure;and it isa1so necessary to use a cooling medium at an extremely low tempera-ture that wil1 maintain a sufficient1y low cooling condition.  \nFurthermore,from the fact that the boiling point of the hydro-cyanic acid is -13c,this must be maintained in the concentratingvessels or the acid solidifies.  In view of that,a cooling mediumthat brin","cbCaiezJ90qx0R6l","https://ap.wps.com/l/cbCaiezJ90qx0R6l","pdf",1175573,36,"English","# A process for the manufacture of acetone cyanhydrin\n## 1. Title of the Invention\n## 2. Limits of the Patent Claims\n## 3. A detailed Description of the Invention","[{\"question\":\"What reaction is used to produce acetone cyanohydrin in the claimed process?\",\"answer\":\"Hydrocyanic acid and acetone are reacted together in the presence of an alkali catalyst.\"},{\"question\":\"How does the method address decomposition during distillation?\",\"answer\":\"It maintains column-bottom temperatures below 110°C and uses vacuum conditions so decomposition of acetone cyanohydrin is prevented.\"},{\"question\":\"What operational ranges are specified for the second-stage distillation?\",\"answer\":\"The second stage is operated at pressures from 10 to 70 Torr with a column-bottom temperature below 110°C while withdrawing and separating hydrocyanic acid and acetone from water/moisture.\"}]","A Process for the Manufacture of Acetone Cyanhydrin | PDF",1789968771,91]