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A kind of recycling method of waste diatomite filter cake in plasticizer factory

A technology for waste diatomite and soil filter cake is applied in the field of reuse of waste diatomite filter cake in plasticizer factories, which can solve the problems of high treatment cost, secondary pollution, waste gas environmental pollution and the like, and achieves a simple production process. , Conducive to environmental protection, small investment effect

Active Publication Date: 2016-04-27
中山联成化学工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The harmless treatment of waste diatomaceous earth in other chemical fields is mainly activation and reuse, but the activation process is complicated. After activation, it can generally be used for about 6 times, and solid waste is still generated in the end, resulting in secondary pollution; and the activation process requires the addition of oxidants , high-temperature treatment, high treatment cost, the organic matter contained in the waste diatomite is easily oxidized, and waste gas is generated to cause environmental pollution, and there are hidden dangers in production safety
In a word, the existing technology for treating waste diatomite is complex, technically difficult, and operability is not strong, and secondary pollution occurs during or after treatment, so it is not suitable for waste diatomite filter cake in plasticizer factories. Harmless treatment

Method used

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  • A kind of recycling method of waste diatomite filter cake in plasticizer factory

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Weigh raw materials:

[0035] 100 parts by weight of polyvinyl chloride resin (PVC),

[0036] 120 parts by weight of spent diatomite filter cake,

[0037] Composite heat stabilizer 3 parts by weight.

[0038] The composite heat stabilizer is a mixture of calcium isooctanoate, zinc isooctanoate, calcium benzoate, and phosphite antioxidant 3010 (Zhiyi Seika) in a mass ratio of 3:3:2:1.

[0039] Among them, the waste diatomite filter cake is screened, and impurities (such as screws, iron slag, etc.) are removed by rolling sieves, vibrating sieves, and translational sieves, dried and ground to 60 mesh.

[0040] 2) Transport the raw materials to a high-speed mixer for kneading according to the proportioning ratio to obtain a mixture. The kneading temperature is 130° C. and the kneading time is 10 minutes.

[0041] 3) The mixture is fed by a screw feeder and conveyed to a conical twin-screw extruder for extrusion. The temperature of the body of the extruder is 170°C, an...

Embodiment 2

[0045] 1) Weigh raw materials:

[0046] PVC100 parts by weight,

[0047] 100 parts by weight of waste diatomite filter cake,

[0048] Plasticizer DOTP20 parts by weight,

[0049] Composite heat stabilizer 3 parts by weight.

[0050] The composite heat stabilizer is a mixture of calcium isooctanoate, zinc isooctanoate, calcium benzoate, barium benzoate, and phosphite (WESTON) in a mass ratio of 5:5:4:1:1.

[0051] Among them, the waste diatomite filter cake is screened, dried and ground to 100 mesh.

[0052] 2) Transport the raw materials to a high-speed mixer according to the proportion and knead them to obtain a mixture. The kneading temperature is 100° C. and the kneading time is 30 minutes.

[0053] 3) The mixture is fed by a screw feeder and conveyed to a conical twin-screw extruder for extrusion. The temperature of the body of the extruder is 150°C, and the temperature of the head of the extruder is 155°C.

[0054] 4) Extrude the strip-shaped plastic, and cut it into...

Embodiment 3

[0057] 1) Weigh raw materials:

[0058] PVC100 parts by weight,

[0059] 200 parts by weight of spent diatomite filter cake,

[0060] 0.2 parts by weight of paraffin,

[0061] 0.3 parts by weight of calcium stearate,

[0062] Composite heat stabilizer 5 parts by weight.

[0063] The composite heat stabilizer is a mixture of barium isooctanoate, zinc benzoate, and phosphite (WESTON) in a mass ratio of 6:5:1.

[0064] Among them, the waste diatomite filter cake is screened, dried and ground to 100 mesh.

[0065] 2) Transport the raw materials to a high-speed mixer for kneading according to the proportioning ratio to obtain a mixture. The kneading temperature is 130° C. and the kneading time is 10 minutes.

[0066] 3) The mixture is fed by a screw feeder and conveyed to a conical twin-screw extruder for extrusion. The temperature of the body of the extruder is 170°C, and the temperature of the head of the extruder is 180°C.

[0067]4) Extrude the strip-shaped plastic, and c...

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Abstract

The invention discloses a recycling method of waste diatomite filter cake from a plasticizer factory, optimizes the production line of polyvinyl chloride plastic granules, uses the waste diatomite filter cake produced by a plasticizer factory as the main raw material, and makes economic value Higher polyvinyl chloride plastic pellet products. The method is a physical mixing process, directly utilizes all the waste diatomite, no waste water is generated, no new solid waste is generated, and no secondary pollution is generated. The limited resources are fully and effectively used, and it is also beneficial to environmental protection and beneficial to the environment. Significant economic and social benefits. The production process of the invention is simple, the existing polyvinyl chloride plastic granule production device can be used to realize the reuse of waste diatomite, and the investment is small.

Description

technical field [0001] The invention relates to a method for reusing waste diatomite filter cake in a plasticizer factory. Background technique [0002] Diatomaceous earth is a kind of biological sedimentary rock composed of the remains (shell) of diatoms, radiolarians or sponges. It has light weight, good chemical stability, high porosity, sound insulation, wear resistance, strong adsorption, and high melting point. It has been widely used in various industrial sectors as filter aids and fillers. In the process of producing plasticizer, diatomaceous earth is used as a filter aid in the filtration process to remove remaining catalysts and other impurities to ensure the color and volume resistivity of the product. The waste diatomite filter cake after use mainly contains diatomite (about 50-80%), plasticizer (about 20-50%), sodium salt (terephthalic acid, phthalic acid, adipic acid, etc. ), the washed catalyst product (about 0.5-5%), the micropores that act as a filter are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K13/02C08K3/34
Inventor 刘旭斌李中兴吴勇刘治河王陈禹
Owner 中山联成化学工业有限公司
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