Technology for recycling paraffin-resin mold material
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Embodiment 1
[0024] A recycling process for paraffin-resin molding materials,
[0025] A), adding hydrochloric acid HCL of 2% of the weight of the recycled material to the recycled material; the pH value of the hydrochloric acid HCL is 1;
[0026] B), add 30% water of recycled material weight to recycled material;
[0027] C), feed steam into the recovered material added with water and hydrochloric acid to make the recovered material boil for 10 minutes;
[0028] D), the recovered material obtained in step C) is allowed to stand still for at least 20 minutes; and the temperature is kept at 80°C to obtain a mixed solution; the obtained mixed solution is filtered through a 150-mesh sieve;
[0029] E) Cool the mixed liquid obtained in step D) naturally, let off the acid water, and obtain the finished wax plate.
Embodiment 2
[0031] A recycling process for paraffin-resin molding materials,
[0032] A), adding hydrochloric acid HCL of 2% of the weight of the recycled material to the recycled material; the pH value of the hydrochloric acid HCL is 1;
[0033] B), add 30% water of recycled material weight to recycled material;
[0034] C), feed steam into the recovered material added with water and hydrochloric acid to make the recovered material boil for 10 minutes;
[0035] D), the recovered material obtained in step C) is allowed to stand still for at least 20 minutes; and the temperature is kept at 80°C to obtain a mixed solution; the obtained mixed solution is filtered through a 150-mesh sieve;
[0036] E) Naturally cool the mixed liquid obtained in step D) to normal temperature, let off the acid water, and obtain the finished wax plate or wax liquid.
Embodiment 3
[0038] A recycling process for paraffin-resin molding materials,
[0039] A), adding hydrochloric acid HCL of 4% of the weight of the recycled material to the recycled material; the pH value of the hydrochloric acid HCL is 1.5;
[0040] B), add 35% water of recycled material weight to recycled material;
[0041] C), feed steam into the recovered material added with water and hydrochloric acid to make the recovered material boil for 15 minutes;
[0042] D), the reclaimed material obtained in step C) is allowed to stand still for at least 20 minutes; and the temperature is kept at 90°C to obtain a mixed solution; the obtained mixed solution is filtered through a 150-mesh sieve;
[0043] E) Naturally cool the mixed liquid obtained in step D) to 50°C, let off the acid water, and obtain the finished wax liquid.
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