Simple and convenient synthesis method and application of waste grease based polyhydric alcohol

[0016] A kind of simple and convenient synthetic method of waste grease-based polyol of the present embodiment comprises the following steps:

[0017] Step 1 Pretreatment process of waste oil

[0018] After heating the swill oil to 60°C, filter it with a sand core to remove impurities such as soil, food residues, detergents, etc., then use vacuum distillation at 110°C to remove the water in the oil, and finally, add acid clay for Adsorption and decolorization can obtain the treated swill oil.

[0019] Step 2 Synthesis of waste oil-based polyols

[0020] Stir and mix the pretreated swill oil and 3-amino-1,2-propanediol, control the mass ratio of waste oil to amino alcohol to 1:0.5, heat and stir at 140°C for 3 h, and distill under reduced pressure to remove the by-products. The product water was cooled, and the insolubles were filtered out to obtain swill oil 3-amino-1,2-propanediol polyol with a hydroxyl value of 283 mgKOH / g.

[0021] This embodiment has the following ch

[0023] A kind of simple and convenient synthetic method of waste grease-based polyol of the present embodiment comprises the following steps:

[0024] Step 1 Pretreatment process of waste oil

[0025] After heating the waste frying oil to 60°C, filter it with a sand core to remove impurities such as soil, food residues, detergents, etc., and then use vacuum distillation at 110°C to remove the moisture in the oil, and finally, add acid The white clay is adsorbed and decolorized to obtain the treated waste oil for frying.

[0026] Step 2 Synthesis of waste oil-based polyols

[0027] Stir and mix the pretreated waste oil from frying with tris(hydroxymethyl)aminomethane, control the mass ratio of waste oil to amino alcohol to 1:0.4, heat and stir at 160°C for 12 h, then distill under reduced pressure The by-product is cooled in water, and the insoluble matter is filtered out to obtain the tris(hydroxymethyl)aminomethane polyol product of frying waste oil, with a hydroxyl value o

[0030] A kind of simple and convenient synthetic method of waste grease-based polyol of the present embodiment comprises the following steps:

[0031] Step 1 Pretreatment process of waste oil

[0032] After heating the waste oil to 60°C, filter it with a sand core to remove impurities such as soil, food residues, detergents, etc., then use a vacuum distillation method at 110°C to remove the water in the oil, and finally add acid white clay for Adsorption decolorization, that is, the treated waste oil.

[0033] Step 2 Synthesis of waste oil-based polyols

[0034] Stir and mix the pretreated waste oil and 3,4-pyrrolidinediol, control the mass ratio of waste oil to amino alcohol to 1:0.7, heat and stir at 120°C for 15 hours, and distill off the by-product water under reduced pressure After cooling, the insolubles were filtered off to obtain the waste oil 3,4-pyrrolidinediol polyol product with a hydroxyl value of 343 mgKOH / g.

[0035] This embodiment has the following character