Slide 1

BI TIU LUNAXIT TEREPHTALIC GVHD: PGS-TS: Phm Thanh HuynSVTH : L c TchBi Vn ThPhan Vn TnhL Th Thu Thy Trng Th Thanh Thy

NI DUNG CHNHTnh cht Phng php sn xutng dngCh tiu cht lngTn cha v bo qunc hi v an ton lao ng

1. Tnh cht:

1.1 nh ngha: Axit terephtalic l mt axit dicacboxilic thm, c cng thc cu to l vng benzen c gn hai nhm COOH v tr 1 v 4. ng vi axit ny c hai ng phn l axit izophtalic v axit phtalic

1.2 Tnh cht vt l

Axit terephtalic tn ti dng tinh th mu trng hoc dng btha tan t trong nc, axit acetic,metanol.Thng hoa 402 oC.Pht ra khi cay v khi kh chu khi b nung nng phn hy

nTrng lng phn t166,13im nng chy oC140,6im si oC288Mt tinh th(g/cm3)1,58Nhit hnh thnh(kj/mol)-816Nhit t chy 250C3189Hng s in li th nhtHng s in li th hainh la nhit trong khng kh

Bng mt s thng s vt l ca axit terephtalic: ha tan ca axit terephtalic(g/100g dung mi) 250 oC150 oC200 oC250 oCNc0.00170.241.712.6Metanol0.103.1Axit axetic0.0130.381.55.71.3 Tnh cht ha hc:

1.3.1 Tnh axit:y l axit phn ly 2 nc, nc 1 mnh hn nc 2

1.3.2 Phn ng este ha:

1.3.3 Phn ng trng ngng:

2. Phng php sn xutOxy ha p-xylen bng axit nitricCng ngh WittenCng ngh Amoco

2.1 Oxy ha p-xylen bng axit nitricy l qu trnh cng nghip u tin c s dng sn xut axit terephtaleic. Qu trnh ny s dng phn ng oxy ha pha lng p-xylen bng axit nitric 165 0C v 1MPa. Phn ng xy ra nh sau:

2.2 Cng ngh Witten:

2.3 Cng ngh Amoco:

3. ng dng: L nguyn liu quan trng sn xut si polyeste dng cho ngnh dt maySn xut nha polyetylen terephtalat(pet), nguyn liu sn xut chai nha vt liu bao b v mng mng.iu ch cht mu, dc phm.Tng hp lm ct sc k kh

4.Ch tiu cht lng:

5. Tn cha v bo qun:Axit terephtalic dng bt c bo qun v lu tr trong cc hm cha Vn chuyn ln bng xe t, xe ti ko, container vi ng ng bng polyetylen,xe ti c thng cha chuyn dng,vn ti bng bao, bao giy

6. c hi v an ton lao ng:Axit terephtalic c c tnh thp v gy kch ng cho da, mt v h thng h hpAxit terephtalic c th to hn hp n vi khng kh vi hm lng ti thiu 40g/m3

TI LIU THAM KHOTng hp hu c-ha du (Pgs.Ts Phm Thanh Huyn)Ullmanns Encyclopedia of Idustrial Chemistry.pdf-SumatraPDFHa hc hu c 2 (Pgs.Ts nh Rng)