A kind of preparation method of 2,4-hexadienoic acid
A technology of hexadienoic acid and hexadienoic acid polyester, applied in 2 fields, can solve the problems of large amount of waste water, depolymerization yield of only 80%, and difficult treatment of salty waste water, etc., and achieves the effect of high yield of finished products
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Embodiment 1
[0043] Embodiment 1: composite solid acid catalyst Pt-WO of the present invention 3 / ZrO 2 The preparation method:
[0044] 7.62gZrO(NO 3 ) 2 Make an aqueous solution, and then add ammonia water to obtain Zr(OH) 4 Precipitate, then filter, wash, dry, grind, impregnate with 104.75g ammonium tungstate for 6-8 hours, finally dry and roast to obtain WO 3 / ZrO 2 .
[0045] With cyclohexane as the continuous phase, cetyltrimethylammonium bromide (CTAB) as the surfactant, n-hexanol as the co-surfactant, 5.13ml, 0.15mol / L of chloroplatinic acid (H 2 PtCl 6 ) solution and 104.21g of 40% hydrazine hydrate (N 2 h 4 ·H 2 O) The water phase constitutes a microemulsion system, and the prepared WO is added to the microemulsion system 3 / ZrO 2 , add tetrahydrofuran under stirring to break the emulsification, separate, dry, and roast the solid at 400-550 degrees to obtain 100g of Pt-loaded WO 3 / ZrO 2 Solid super acid. The mass fraction of Pt is 0.15%, and the mass fraction of Z...
Embodiment 2
[0046] Embodiment 2: composite solid acid catalyst Ni-WO of the present invention 3 / ZrO 2 The preparation method:
[0047] 6.35gZrO(NO 3 ) 2 Make an aqueous solution, and then add ammonia water to obtain Zr(OH) 4 Precipitate, then filter, wash, dry, and finely grind, then impregnate with 105.42g ammonium tungstate for 6-8 hours, and finally dry and roast to obtain WO 3 / ZrO 2 .
[0048] Using cyclohexane as the continuous phase, cetyltrimethylammonium bromide (CTAB) as the surfactant, n-hexanol as the co-surfactant, and 3.38ml, 1mol / L NiCl 2 Solution and 109.68g mass fraction are 40% hydrazine hydrate (N 2 h 4 ·H 2 O) The water phase constitutes a microemulsion system, and the prepared WO is added to the microemulsion system 3 / ZrO 2 , add tetrahydrofuran under stirring to break the emulsion, separate, dry, and roast the solid at 400-550 degrees to obtain 100g of Ni-loaded WO 3 / ZrO 2 Solid super acid. The mass fraction of Ni is 0.2%, and the mass fraction of Zr...
Embodiment 3
[0049] Embodiment 3: composite solid acid catalyst Ni-MoO of the present invention 3 / MnO 2 The preparation method:
[0050] 6.87gMnCl 2 Make an aqueous solution, and then add ammonia water to obtain Mn(OH) 4 Precipitate, then filter, wash, dry, and finely grind, then impregnate with 116.55g of ammonium molybdate for 6-8 hours, and finally dry and roast to obtain MoO 3 / MnO 2 .
[0051] With cyclohexane as the continuous phase, nonylphenol polyoxyethylene ether (TX-10) as the surfactant, n-butanol as the co-surfactant, 3.38ml, 1mol / L NiCl 2 The solution and ammonia water form a microemulsion system as the water phase, and the prepared MoO is added to the microemulsion system 3 / MnO 2 , add tetrahydrofuran under stirring to break the emulsion, separate, dry, and roast the solid at 400-550 degrees to prepare Ni-loaded MoO 3 / MnO 2 Solid super acid. The mass fraction of Ni is 0.2%, and the mass fraction of Mn is 3%.
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