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A kind of devolatilization method and devolatilization system

A technology for removing and volatile matter, which is applied in the field of devolatilization methods and devolatilization systems, and can solve the problems of no continuous removal and inability to efficiently remove small molecule volatiles.

Active Publication Date: 2022-04-15
绍兴福膜新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Chinese Patent Publication No. CN 201287457Y (2009) discloses a solution to the problem that the existing devolatilization system cannot efficiently remove the small molecule volatiles produced in the extrusion process of polypropylene blends, and provides a method to improve the The devolatilization efficiency of propylene blends in the screw extrusion process, the small molecule volatiles removal system for efficiently removing small molecule volatiles
[0013] However, with the upgrading of the national industrial policy, the improvement of environmental protection standards, and the revision of the indoor air quality pollution limit, the above-mentioned disclosed technology has a positive effect on maleated polymers, i.e. hydrophobic polymers with polarity. Low molecular weight volatiles of radicals and non-polar segments do not have effective continuous removal capability

Method used

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  • A kind of devolatilization method and devolatilization system
  • A kind of devolatilization method and devolatilization system
  • A kind of devolatilization method and devolatilization system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0132] The blend to be treated is:

[0133]

[0134] Append figure 1 As shown, the blend to be processed is supplied from 601 to the feed segment 12 of the twin-screw extruder after 602, and the blend of the feed section 12 is 260 kg / hr, and the temperature is 30. At ° C, the total carbon exudation value was detected, i.e., VOCS of about 4200 μg C / g, about 1092 g / hr. System 12, system 13, and system 14 constitute a twin screw extruder, extruded long range ratio of L / D = 40, rotational speed 400R / min, temperature control 180-230 ° C, melt pressure 2.2 MPa.

[0135] The mixed solvent 801 consists of polar ethanol and non-polar n-hexane, a ratio of molar ratio 1: 10, mass flow rate of 30 kg / hr. The melting and mixing segment 13 of the double screw extruder is injected through the 802 injection system 18. The shear and stretch of the twin screw extruder, the molten blend is mixed with the mixed solvent, wherein the n-hexane swollen PP polymer, the polarity of ethanol is ...

Embodiment 2

[0139] The blend to be treated is:

[0140]

[0141]

[0142] Append figure 1 As shown, the blend to be processed is supplied from 601 to the feed segment 12 of 602, and the blending of the feed section 12 is 280 kg / hr, and the temperature is 30 At ° C, the total carbon exudation value of the detected, that is, the VOCS is about 5000 μgc / g, about 1400 g / hr. System 12, system 13, and system 14 form a twin screw extruder, extruder length diameter ratio of l / d = 40, rotational speed 420 r / min, temperature control 190-230 ° C, melt pressure 2.0 MPa.

[0143] The mixed solvent 801 consists of polar ethanol and non-polar n-hexane, the ratio is molar ratio of 1:10, and mass flow is 25 kg / hr. The melting and mixing segment 13 of the double screw extruder is injected through the 802 injection system 18. The shear and stretch of the twin screw extruder, the molten blend is mixed with the mixed solvent, wherein the n-hexane swollen PP polymer, the polarity of ethanol is mixed...

Embodiment 3

[0147] The blend to be treated is:

[0148]

[0149] Append figure 1 As shown, the blend to be treated is fed into the feed segment 12 of 602 after 602, and the blend of the feed section 12 is 320 kg / hr, and the temperature is 30. At ° C, the total carbon exudation value was detected, i.e., VOCs of about 3800 μgc / g, about 1216 g / hr. System 12, system 13, and system 14 constitute a twin screw extruder, extruded long range ratio of L / D = 40, rotational speed 450 r / min, temperature control 180-230 ° C, melt pressure 1.5 MPa.

[0150] The mixed solvent 801 consists of polar ethanol and non-polar n-hexane, the ratio of molar ratio 1:10, and mass flow is 40 kg / hr. The melting and mixing segment 13 of the double screw extruder is injected through the 802 injection system 18. The shear and stretch of the twin screw extruder, the molten blend is mixed with the mixed solvent, wherein the n-hexane swollen PP polymer, the polarity of ethanol is mixed with the melt blend, and the...

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Abstract

The invention discloses a devolatilization method and a system for realizing the devolatilization method. The system includes a main body portion including a feed section, a melt mixing section connected to the feed section, a delivery exhaust section connected to the melt mixing section, and a cooling cooling section connected to the delivery exhaust section, and appendages. Cutting and drying part; auxiliary devices include solvent introduction system, vacuum devolatilization system and volatile organic compound treatment system. The method is to remove the volatiles in the copolymer under vacuum or high vacuum conditions in the way of continuous feeding and discharging, and adopt the method of solvent entrainment, so as to realize the isolation state of materials, environment and operators during the devolatilization process Under the devolatilization, increase efficiency and reduce energy consumption. The invention mainly discloses a devolatilization method and system.

Description

Technical field [0001] The present invention relates to the field of polymer projection, and more particularly to a diathating method and a die-proof system. Background technique [0002] With the improvement of living standards, people's environmental awareness has gradually increased, and air pollution is increasingly received by everyone, and the air quality requirements for closed space are increasing. Interior materials are one of the main sources of air pollution in the closed space, which exudes low molecular organic volatiles to cause serious harm to human liver, kidney, respiratory system, hematopoietic organ, immune function. Low molecule organic volatility derived from no polymer monomers, solvents, low molecular weight polymers, uncrosslinked additives and reaction by-products, and the like. This requires new requirements for indoor decorative materials and plastic products for vehicles. [0003] Polymer polymethacrylic acid, polymethyl methacrylate, polypropylene, po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/18B01D53/14C08L51/06C08L23/08C08K3/26C08K5/134
CPCB01D53/18B01D53/1487C08L51/06C08K2003/265C08L23/08C08K3/26C08K5/1345
Inventor 刘会举顾方明修国华
Owner 绍兴福膜新材料有限公司
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