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Spray flash dryer and surfactant solvent removal system

A flash dryer and ejector technology, which is applied in the field of surfactant removal technology, can solve the problems of high risk and explosive mixtures, and achieve high safety effects

Pending Publication Date: 2022-08-09
江苏优扬药业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, air and organic solvents are prone to form explosive mixtures, which are highly dangerous

Method used

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  • Spray flash dryer and surfactant solvent removal system
  • Spray flash dryer and surfactant solvent removal system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] like figure 2 Shown: a jet flash dryer, comprising a jet cylinder, an upper head 71 is fixed on the upper end of the jet cylinder, and a feed port 70 is provided on the upper head 71; A distribution plate 72, a first injector 73, a second distribution plate 74 and a second injector 75; the upper head 71 and the first injector 73 are connected by flanges, and the first distribution plate 72 is sandwiched between the two between. The first injector 73 and the second injector 75 are connected by flanges, and the second distribution plate 74 is sandwiched therebetween. The first distribution plate and the second distribution plate are respectively provided with small holes; the first injector and the second injector are respectively provided with injection pipes 731, and the injection pipes are provided with air intake holes 732; The lower end of the spray cylinder is connected to the gas-solid separation tank 79 through a flange.

[0023] In the jet flash dryer 7, 70% ...

Embodiment 2

[0026] like figure 1 As shown, a solvent removal system for surfactants includes the aforementioned jet flash dryer 7, and also includes a neutralization system 1, a feed pump 2, a preheater 3, a thermal circulation pump 4 and a discharge extruder 8; The discharge port of the neutralization system 1 is connected to the lower feed port of the preheater 3 through the feed pump 2; The lower feed port of the preheater 3 is provided with a check valve 5 on the pipeline; the other way is connected to the feed port 70 of the jet flash dryer 7, and the pipeline is provided with a back pressure valve 6; the injection The lower end of the flash dryer 7 is connected to the discharge extruder 8 .

[0027] The sulfonated acid ester, liquid caustic soda and solvent react in the neutralization system 1 to obtain high-concentration monomers. The materials in the neutralization system are transported by the feed pump 2 and mixed with the hot material transported by the circulating pump 4, and...

Embodiment 3

[0038] A solvent removal system as described in Example 2 was used.

[0039] MESA ester, liquid caustic soda and methanol generate 65% hexadecyl octadecyl fatty acid methyl ester sulfonate in neutralization system 1, the temperature is about 50 °C, and the materials at 130 °C are transported and circulated by feed pump 2 and mixed into the pre-treatment system. Heater 3 is heated, the temperature after heating is 130°C, and the back pressure is 0.9MPa. The circulation ratio is 5:1, that is, the flow rate in the preheater is increased by 5 times.

[0040] The preheated monomer material is transported to the jet flash dryer 7, and the pressure at the feed port drops to 0.4 MPa. Then it enters the injection pipe in the first injector 73 through the small holes on the upper head and the first distribution plate 72, and the temperature will drop. Then, it is sent to the injection pipe in the second injector 75 through the small holes on the second distribution plate 74, the outle...

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Abstract

The invention discloses a jet flash dryer and a solvent removal system for a surfactant. The jet flash dryer comprises a jet cylinder, an upper end socket is fixed to the upper end of the jet cylinder, and a first distribution plate, a first ejector, a second distribution plate and a second ejector are arranged in the jet cylinder; the upper sealing head and the first ejector are connected through a flange, and the first distribution plate is clamped between the upper sealing head and the first ejector; the first ejector and the second ejector are connected through a flange, and the second distribution plate is clamped between the first ejector and the second ejector; small holes are respectively formed in the first distribution plate and the second distribution plate; injection pipes are arranged in the first injector and the second injector respectively, and air inlet holes are formed in the injection pipes; and the lower end of the injection cylinder is connected with a gas-solid separation tank through a flange. According to the solvent removal system for the surface active agent, the relation between the boiling point of the volatile solvent and the evaporation pressure is utilized, and pipeline blockage caused by too low temperature due to evaporation heat absorption is prevented.

Description

technical field [0001] The invention relates to a jet flash dryer, which is especially suitable for the process of removing surfactants containing low-boiling volatile solvents into solid form after drying. Background technique [0002] The production of pharmaceutical excipients often requires the use of some dangerous solvents, and these solvents must be removed for the final product preparation. At present, the most commonly used removal methods are heating and flashing through the heating tower kettle or through the circulating heat exchanger, which is inefficient, takes a long time, and easily deteriorates the finished product. The change of the state of the material in the removal process causes the process to fail, or the removal is not complete. Some materials become solid after the release and are not used. [0003] For the production of solid hexadecanoyl sulfate, the current process is to first produce 20-30% of the monomer, and then carry out hot air spray dryi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/06
CPCB01D3/06Y02P70/10
Inventor 祝红元张欣刘海华
Owner 江苏优扬药业有限公司