Process for resourcing municipal solid waste
A process for converting organic MSW into liquid fuels or chemical products in almost quantitative yield via catalytic one-pot hydrolytic depolymerization of organic MSW. The organic MSW comprises all organic materials that exists in municipal solid waste, such as paper and paperboard, food scraps, yard trimmings, rubber, leather, textiles, wood, plastics, etc. The process is the first one over the world for resourcing municipal solid waste.
1. A process for converting organic Municipal Solid Waste (MSW) into liquid fuels or chemical products in quantitative yield via a catalytic one-pot hydrolytic depolymerization of the organic MSW, comprising the steps of:
(a) providing the organic MSW;
(b) subjecting the organic MSW to a catalytic one-pot hydrolytic depolymerization in the presence of a catalyst and an alkaline earth metal oxide or hydroxide or a transition metal oxide or hydroxide; wherein the catalyst is an organic chemical of formula I or II:
wherein in formula I and formula II, R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 are the same or different, and are selected from H, SO 3 H, NO 2 , NH 2 and OH;
(c) filtering out the depolymerization product of the organic MSW; and
(d) alkylating the product of depolymerization.
2. The process according to claim 1 in which filtering out the depolymerization product of organic MSW occurs at a temperature below ten degrees Celsius.
3. The process according to claim 2 in which the organic MSW comprises paper, paperboard, food scraps, yard trimmings, rubber, leather, textiles, wood and plastics.
4. The process according to claim 1 in which the filtering is pressed filtration carried out at a temperature above 60 degrees Celsius wherein a brown color solid product is obtained.
5. The process according to claim 2 in which the metal oxides or hydroxides are selected from magnesium, calcium, strontium, barium, iron or copper.
6. The process according to claim 2 in which the ratio of organic MSW to oxide or hydroxide is in the range of 50 grams of organic MSW:1 molar equivalent of oxide or hydroxide anion to 100 grams of organic MSW:1 molar equivalent of oxide or hydroxide anion.
7. The process according to claim 2 in which the alkylation step produces liquid fuels.
8. The process according to claim 7 in which the alkylation step is a one step process and is performed using dimethyl sulfate or dimethyl carbonate as alkylation reagents.
9. The process of claim 7 wherein the liquid fuels are separated into aromatic and non-aromatic chemicals.
10. The process of claim 9 in which the aromatic chemicals are used as the catalysts.