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A continuous process method for producing methyl silicone oil with various viscosities

A technology of methyl silicone oil and process method, applied in the direction of separation method, chemical instrument and method, filtration separation, etc., can solve the problems that the content of low-molecular substances cannot be guaranteed not to exceed the standard, difficult to control product technical indicators, and low equipment efficiency, etc., to achieve The effect of simple structure, reduced energy consumption, and small space required for equipment

Active Publication Date: 2022-02-22
JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low viscosity of low-viscosity silicone oil, it is difficult to form a liquid film in the de-lowering thin film evaporator, resulting in low equipment efficiency, and it cannot guarantee that the content of low-molecular substances in the product does not exceed the standard, so it is not suitable for the removal of low-viscosity silicone oil. low molecular weight
At present, multiple thin-film evaporators are connected in parallel or in series. Although the volatile content in the product can be limited to a certain extent, the equipment investment cost is high and the energy consumption is large.
Other low-molecular-weight removal process equipment includes tube-and-tube type and scraper type, both of which need to use high-temperature conditions (close to 300°C) in a large space to remove low-molecular weight and can only produce high-viscosity methyl silicone oil products. Moreover, in the process of producing a batch of methyl silicone oil, more than 2 / 3 of the time is in the lowering process, which requires strict sealing performance of the lowering equipment, otherwise the technical indicators of the product will be difficult to control

Method used

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  • A continuous process method for producing methyl silicone oil with various viscosities
  • A continuous process method for producing methyl silicone oil with various viscosities
  • A continuous process method for producing methyl silicone oil with various viscosities

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The continuous process of methyl silicone oil producing a plurality of viscosities, including the following steps:

[0050] (1) 1 ton of the raw material dimethylcycloysiloxane mixture (DMC) and the hexamethiloxane (mm) 350 kg are delivered into the bumper tank according to the mass ratio 1: 2.857, and stir evenly, resulting in a mixture;

[0051] (2) Enter the mixture into the first preheater (steam preheater), and set the temperature of the first preheater to 100 ° C;

[0052] (3) The preheating mixture enters the acidic resin (604 resin) fixed bed reactor by the rotor flow meter, the reaction temperature is 100 ° C, the flow rate is 300 l / hr, the reaction residence time is 0.5 h, and the methyl is obtained. Silicone oil polymer;

[0053] (4) The methyl silicone polymer obtained by step (3) enters the second preheater (silicone oil heater) heating, and the temperature of the first preheater is 140 ° C;

[0054] (5) After the preheating, the methyl silicone polymer is in...

Embodiment 2

[0078] The continuous process method of the production of a plurality of viscosity of the present embodiment is the same as in Example 1.

[0079] The multilayer thin film evaporator of the present embodiment, such as figure 2 As shown, the positioning rod 3 penetrates all of the film discs and is only fixed to all of the first thin film discs, and two guide rods 12 are provided around the positioning rod 3, and the guide rod 12 penetrates all of the film discs and only with all of the second thin film disc. The 901 is fixed, and the positioning rod 3 is moved up and down. The spacing of 901. The other structure of the thin film evaporator is the same as in Example 1.

Embodiment 3

[0081] The continuous process method of the production of a plurality of viscosity of the present embodiment is the same as in Example 1.

[0082] The multilayer thin film evaporator of the present embodiment is a vertical thin film evaporator. The top is provided with a steam outlet 1 for discharging a low molecular material; a feed port 2 is provided on the upper side; the inside is provided with a five sets of films. The dish is made such that the methyl silicone polymer can form a continuous liquid film on each group of thin film trays; the spacing of the thin film disc is adjusted by the positioning rod 3 to accommodate a different viscosity methyl silicone polymer; thin film evaporator The bottom is provided with a discharge port 4 for discharging the product. The exterior of the thin film evaporator is provided with a heating jacket, and a high-temperature silicone oil is input in the jacket as a heating source.

[0083] The structure of the positioning rod 3 and the film d...

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Abstract

The present invention relates to a kind of continuous process method of producing the methyl silicone oil of various viscosity, described process method comprises the following steps: (1) mix raw material dimethyl cyclosiloxane mixture (DMC) and hexamethyldisiloxane (MM) After batching, the first stage of preheating is carried out; (2) After the first stage of preheating, the raw materials are polymerized in the acid resin fixed bed reactor to obtain methyl silicone oil polymer material; (3) methyl silicone oil polymerization After the material is heated in the second stage, it enters a multi-layer thin film evaporator for low-molecular removal treatment to obtain a silicone oil product. The multi-layer film evaporator provided by the present invention is specially designed for the de-lowering process of low-viscosity methyl silicone oil. Removal greatly shortens the time for lowering, so that the material can complete the lowering after passing through the multi-layer film disc, and directly enter the next process, that is, realize the continuous production process.

Description

Technical field [0001] The present invention belongs to the technical field of methyl silicone oil production, and more particularly to a continuous process of producing a plurality of viscosity of methyl silicone oil. Background technique [0002] Silicone oil is a general title of silicon compound containing silicon oxygen bond (-Si-Si-), which is much specifically. Among them, methyl silicone oil has excellent heat resistance, cold resistance, high low temperature, water resistance, chemical stability, electrical insulation, compression, shear, physiological inert, light transmittance, low surface tension Many excellent physical chemistry properties. According to the viscosity, methyl silicone oil is mainly used in electronic appliances, building materials, motor manufacturing, transportation, petrochemical, textile, leather and personal nursing field, and the market demand is large. [0003] The existing process is to react with methylcyclosiliciloxane (D4) or dimethyla cyclo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/06C08G77/34B01D36/00B01J8/02
CPCC08G77/06C08G77/34B01D36/00B01J8/02
Inventor 陈彩宁武丽美张振楼康冷发钱熊耀
Owner JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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