Diphenol ba wani sinadarin hydrocarbon mai ƙamshi bane domin yana ɗauke da sinadarin oxygen kuma wani sinadari ne mai ƙamshi.
Ana amfani da 2-naphthol na masana'antu a matsayin naphthol mai inganci, tare da 96-98% sulfonation na 2-naphthol sulfonic acid, sannan tare da sodium sulfite neutralization don samar da gishirin sodium, sannan kuma tare da haɗin sodium hydroxide alkali na 2-naphthol sodium, sannan tare da acidification na sulfuric acid na 2-naphthol danyen samfura, bayan tafasa, wankewa, busarwa, da kuma distillation na samfuran 2-naphthol.
Gurɓatar wannan tsari yana da matuƙar tsanani kuma matsalar kare muhalli ta fi bayyana.
Ci gaban cyanamine na Amurka na 2-isopropylnaphthalene tare da samar da acetone 2-naphthol, saboda farashin kariyar muhalli da wasu dalilai da kuma dakatar da samarwa.
A halin yanzu, manyan ƙasashen da ke samar da 2-naphthol a duniya sune China, Indiya, Japan, Italiya da wasu ƙasashe a Gabashin Turai.
Kasar Sin ta fara samar da nau'in naphthol guda biyu a shekarar 1957. Tun daga shekarun 1980, yayin da kasashen da suka ci gaba suka daina samar da nau'in naphthol guda daya bayan daya, kasar Sin ta zama babbar mai samar da nau'in naphthol guda biyu.
Tun daga shekarar 1990, kasuwar 2-naphthol ta fuskanci gagarumin ci gaba. A cikin 'yan shekarun nan, an ci gaba da samar da tan dubu 8-100 a kowace shekara, kuma fitar da kayayyaki ta kuma ci gaba da samun ci gaba mai yawa, inda fitar da kayayyaki ta kai tan 8,227 a shekarar 2005, tan 15,924 a shekarar 2006, da kuma tan 15,307 daga watan Janairu zuwa Oktoba na shekarar 2007.
Yawan shan 2-naphthol a China kusan kashi 60% na sinadaran rini ne, kashi 20% na abubuwan da ake ƙarawa a roba, kashi 10% na rini da launuka, da kuma kashi 10% na wasu.
Yayin da buƙatar rini da launuka ke ƙaruwa, haka nan buƙatar 2-naphthol za ta ƙaru.
Inganta tsarin samarwa, adana makamashi da rage amfani da shi, rage sharar gida guda uku ko kuma haɓaka sabbin hanyoyin tsaftacewa ya zama muhimmin alkibla ga ci gaba da kuma ci gaba da lafiya a masana'antar samar da 2-naphthol.
Na biyu, aikace-aikacen a cikin masana'antar rini da pigment
Rini da tsaka-tsakin launi sune manyan wuraren da ake amfani da 2-naphthol a China. Babban dalili shi ne cewa samar da tsaka-tsakin rini yana fuskantar canjin yanayi a duk duniya. Misali, 2, 3 acid, J acid, γ acid, R acid da chromophenol AS duk suna da mahimmanci a cikin fitarwa a China, wanda ya kai fiye da rabin jimlar yawan amfanin gida.
Baya ga haɗakar dyestuff da tsaka-tsakin pigment, ana iya amfani da 2-naphthol a matsayin ɓangaren azo, da kuma mahaɗan diazo don samar da dyestuff 1, 2, 3 acid.
2, 3 Sunan kimiyya na ƙara acidification: 2-hydroxy-3-naphthic acid, hanyar haɗa shi ita ce [1]: 2-naphthol da sodium hydroxide amsawa, rage matsewar ruwa, samun 2-naphthol sodium, sannan a yi martani da CO2 don samun 2-naphthol da 2, 3 sodium gishiri, cire 2-naphthol, ƙara acidification, samun 2, 3 acid.
A halin yanzu, manyan hanyoyin haɗa abubuwa sune hanyar mataki mai ƙarfi da hanyar narkewa, kuma hanyar narkewa ita ce yanayin ci gaba gabaɗaya.
Ana haɗa launukan tafki masu ɗauke da acid 2,3 a matsayin abubuwan haɗin gwiwa ta hanyar fara yin abubuwan diazo zuwa gishirin diazo, tare da haɗa su da acid 2,3, sannan ta amfani da gishirin ƙarfe na alkali da na ƙasa na alkali za a iya canza su zuwa launukan tafki marasa narkewa.
Babban chromatogram na launukan tafki 2,3 na acid shine ja.
Misali: CI Pigment Red 57:1, CI Pigment Red 48:1, da sauransu.
Ana amfani da sinadarai 2, 3 sosai wajen haɗa jerin chromophenol na rini masu launin kankara. A cikin Ma'aunin Rini na 1992, an haɗa chromophenols 28 ta hanyar acid 2, 3.
Lakabi phenol AS jerin abubuwan haɗin gwiwa na launin azo, hanyoyin roba na wannan nau'in fenti an yi su ne da gishirin diazonium na diazonium da farko, da kuma launin haɗin phenol AS jerin abubuwan da aka samo asali, kamar su sassan diazo kawai suna ɗauke da zoben alkyl aromatic, halogen, nitrocellulose, ƙungiyoyin alkoxy, kamar launin da aka saba samu daga amsawar phenol AS jerin rini na azo don abubuwan haɗin gwiwa,
Misali, zoben ƙamshi na abubuwan da ke cikin diazo suma sun ƙunshi ƙungiyoyin sulfonic acid, da kuma abubuwan da suka samo asali daga jerin chromophenol AS, sannan za a iya canza gishirin ƙarfe na alkali da alkali zuwa rini na tafki marasa narkewa.
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