Simple method for preparing polyethylene wax from waste plastic

Abstract

The invention discloses a simple method for preparing polyethylene wax from waste plastic, which comprises raw materials, nitrogen, equipment and process flows. The method solves the problems that the prior art is not suitable for private small enterprises to implement on-site reclamation, treatment and utilization by adopting the technical problem that the conventional equipment is matched with simple and feasible process flows of extrusion of a screw extruder, feeding of a cracking kettle, cracking, distillate oil reclamation, emulsified oil reclamation, cooling and crushing, wherein the conventional equipment comprises the screw extruder, the cracking kettle with an electric heater and a stirrer, a stainless steel cooling kettle with a stirrer and a cooling jacket, a stainless steel accommodating tank with an open upper part, a jaw crusher, a vacuum pump, a stainless steel cracking gas reclamation kettle with a cooling jacket, a stainless steel cracking oil storage tank and a stainless steel tail gas emulsifying tank. The simple method for preparing the polyethylene wax from the waste plastic fulfills the purpose of suitability for on-site reclamation, treatment and utilization for the private small enterprises through the conventional equipment and the simple process.

Description

technical field

[0001] The invention relates to the preparation of polyethylene wax, in particular to a simple method for preparing polyethylene wax from waste plastics by using conventional equipment to pyrolyze waste plastics to obtain polyethylene wax. Background technique

[0002] Polyethylene wax is a petrochemical product, widely used as a lubricant and reinforcing agent for rubber products, as a pigment dispersant and brightener in plastic processing, and in the paper industry to improve paper surface gloss, hardness, and anti-sticking of paper. The use of waste plastics to produce polyethylene wax has important economic and social significance for the utilization of waste resources, the elimination of white pollution, and environmental protection.

[0003] The industrialized method of preparing polyethylene wax from waste plastics in the prior art is pyrolysis, such as, Japanese patent (Japanese Patent Laying-Open No. 4351608.1992-12-7. Method for making wax by therm...

Examples

Embodiment

[0036] Examples, see figure 1 ;

[0037] Product Name: Polyethylene Wax

[0038] Raw materials: waste polyethylene plastic particles; nitrogen purity is 99%;

[0039] conditions, equipment

[0040] Ambient air pressure: one atmosphere;

[0041] Ambient temperature: room temperature;

[0042] Preparation equipment: screw extruder, pyrolysis kettle, cooling kettle, material storage box, collar type pulverizer, vacuum pump, pyrolysis gas recovery kettle, pyrolysis oil storage tank, tail gas emulsification tank;

[0043] Process flow:

[0044] Preheating and flushing the screw extruder

[0045] Preheat the barrel of the screw extruder. The barrel is heated in steps of eight temperature zones. The temperature from the hopper mouth to the extrusion nozzle is 150, 200, 250, 300, 350, 400, 450, and 500°C; after reaching the temperature, Start the screw of the screw extruder, open the nitrogen valve of the extruder 3 and flush the barrel and screw with nitrogen, and finish;

[...

technical field

[0001] The invention relates to the preparation of polyethylene wax, in particular to a simple method for preparing polyethylene wax from waste plastics by using conventional equipment to pyrolyze waste plastics to obtain polyethylene wax. Background technique

[0002] Polyethylene wax is a petrochemical product, widely used as a lubricant and reinforcing agent for rubber products, as a pigment dispersant and brightener in plastic processing, and in the paper industry to improve paper surface gloss, hardness, and anti-sticking of paper. The use of waste plastics to produce polyethylene wax has important economic and social significance for the utilization of waste resources, the elimination of white pollution, and environmental protection.

[0003] The industrialized method of preparing polyethylene wax from waste plastics in the prior art is pyrolysis, such as, Japanese patent (Japanese Patent Laying-Open No. 4351608.1992-12-7. Method for making wax by therm...

Examples

Embodiment

[0036] Examples, see figure 1 ;

[0037] Product Name: Polyethylene Wax

[0038] Raw materials: waste polyethylene plastic particles; nitrogen purity is 99%;

[0039] conditions, equipment

[0040] Ambient air pressure: one atmosphere;

[0041] Ambient temperature: room temperature;

[0042] Preparation equipment: screw extruder, pyrolysis kettle, cooling kettle, material storage box, collar type pulverizer, vacuum pump, pyrolysis gas recovery kettle, pyrolysis oil storage tank, tail gas emulsification tank;

[0043] Process flow:

[0044] Preheating and flushing the screw extruder

[0045] Preheat the barrel of the screw extruder. The barrel is heated in steps of eight temperature zones. The temperature from the hopper mouth to the extrusion nozzle is 150, 200, 250, 300, 350, 400, 450, and 500°C; after reaching the temperature, Start the screw of the screw extruder, open the nitrogen valve of the extruder 3 and flush the barrel and screw with nitrogen, and finish;

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