Venturi circulation loop reactor for continuous production of ethephon and method

Abstract

The invention discloses a venturi circulation loop reactor for continuous production of ethephon.The reactor comprises a reactor body, a venturi mixer located at the upper end of the reactor body and a circulating heat exchanger.The venturi mixer comprises a venturi nozzle, a mixing chamber and a diffusion chamber which are sequentially connected from top to bottom.An induction chamber is arranged on the outer side of the venturi nozzle which extends out of the top of the reactor body.One end of the circulating heat exchanger is connected with the bottom end of the reactor body, and the other end of the circulating heat exchanger is connected with the venturi nozzle.The outer side of the induction chamber is connected with an air inlet.The outer side of the nozzle is connected with a raw material port.Compared with the prior art, energy consumption and equipment investment expenses can be greatly reduced, the occupied area can be reduced, and investment of capital construction is saved.The technical route is simple, equipment is compact, product quality is good, energy is saved, consumption is reduced, and the requirement for sustainable development is met.

Description

technical field

[0001] The invention belongs to the field of material processing, and in particular relates to a venturi-type circulation loop reactor and method for continuous production of ethephon. Background technique

[0002] Ethephon is a plant growth regulator, the pure product is white needle crystal, the industrial product is light brown liquid, soluble in water, methanol, acetone, ethylene glycol, propylene glycol, slightly soluble in toluene, insoluble in petroleum ether. Ethephon is a high-quality and high-efficiency plant growth regulator, which has the effects of promoting fruit ripening, stimulating wound flow, and regulating gender transformation. At present, ethephon has been used in rubber flow, fruit ripening, tobacco leaf yellowing, etc., and has broad application prospects in agriculture and horticulture.

[0003] At present, the production method of ethephon mainly adopts the direct addition of phosphorus trichloride and ethylene oxide, followed by rea...

Examples

Embodiment 1

[0029] The raw material 2-chloroethyl phosphate bis(2-chloroethyl) is preheated to 90° C. and then pumped into the Venturi mixer of the Venturi loop reactor, and the injection velocity is controlled to be 50 m / s. After the hydrogen chloride gas reacts with the raw material 2-chloroethyl phosphate bis(2-chloroethyl) in the Venturi loop reactor, part of it is extracted after passing the test, and the remaining part is pumped to the heat exchanger for heat exchange by circulating pumps Back cycle to Venturi mixer. The conversion rate of the reaction was 95% through analytical test.

Embodiment 2

[0031] The raw material 2-chloroethyl phosphate bis(2-chloroethyl) is preheated to 100°C and then pumped into the Venturi mixer of the Venturi loop reactor, and the injection flow rate is controlled to be 60m / s. After the hydrogen chloride gas reacts with the raw material 2-chloroethyl phosphate bis(2-chloroethyl) in the Venturi loop reactor, part of it is extracted after passing the test, and the remaining part is pumped to the heat exchanger for heat exchange by circulating pumps Back cycle to Venturi mixer. The conversion rate of the reaction was 98% through analytical test.

Embodiment 3

[0033] The raw material 2-chloroethyl phosphate bis(2-chloroethyl) is preheated to 115°C and then pumped into the Venturi mixer of the Venturi loop reactor, and the injection flow rate is controlled to be 70m / s. After the hydrogen chloride gas reacts with the raw material 2-chloroethyl phosphate bis(2-chloroethyl) in the Venturi loop reactor, part of it is extracted after passing the test, and the remaining part is pumped to the heat exchanger for heat exchange by circulating pumps Back cycle to Venturi mixer. The conversion rate of the reaction was 99% through analytical test.

[0034] It can be seen from the above examples that the higher the injection velocity, the better the mixing effect and the higher the corresponding conversion rate. But if it exceeds 70m / s, the circulation volume of the circulation system is too large, the energy consumption and production requirements of the circulation pump are too high, and the investment is uneconomical. Due to the precise match...

technical field

[0001] The invention belongs to the field of material processing, and in particular relates to a venturi-type circulation loop reactor and method for continuous production of ethephon. Background technique

[0002] Ethephon is a plant growth regulator, the pure product is white needle crystal, the industrial product is light brown liquid, soluble in water, methanol, acetone, ethylene glycol, propylene glycol, slightly soluble in toluene, insoluble in petroleum ether. Ethephon is a high-quality and high-efficiency plant growth regulator, which has the effects of promoting fruit ripening, stimulating wound flow, and regulating gender transformation. At present, ethephon has been used in rubber flow, fruit ripening, tobacco leaf yellowing, etc., and has broad application prospects in agriculture and horticulture.

[0003] At present, the production method of ethephon mainly adopts the direct addition of phosphorus trichloride and ethylene oxide, followed by rea...

Examples

Embodiment 1

[0029] The raw material 2-chloroethyl phosphate bis(2-chloroethyl) is preheated to 90° C. and then pumped into the Venturi mixer of the Venturi loop reactor, and the injection velocity is controlled to be 50 m / s. After the hydrogen chloride gas reacts with the raw material 2-chloroethyl phosphate bis(2-chloroethyl) in the Venturi loop reactor, part of it is extracted after passing the test, and the remaining part is pumped to the heat exchanger for heat exchange by circulating pumps Back cycle to Venturi mixer. The conversion rate of the reaction was 95% through analytical test.

Embodiment 2

[0031] The raw material 2-chloroethyl phosphate bis(2-chloroethyl) is preheated to 100°C and then pumped into the Venturi mixer of the Venturi loop reactor, and the injection flow rate is controlled to be 60m / s. After the hydrogen chloride gas reacts with the raw material 2-chloroethyl phosphate bis(2-chloroethyl) in the Venturi loop reactor, part of it is extracted after passing the test, and the remaining part is pumped to the heat exchanger for heat exchange by circulating pumps Back cycle to Venturi mixer. The conversion rate of the reaction was 98% through analytical test.

Embodiment 3

[0033] The raw material 2-chloroethyl phosphate bis(2-chloroethyl) is preheated to 115°C and then pumped into the Venturi mixer of the Venturi loop reactor, and the injection flow rate is controlled to be 70m / s. After the hydrogen chloride gas reacts with the raw material 2-chloroethyl phosphate bis(2-chloroethyl) in the Venturi loop reactor, part of it is extracted after passing the test, and the remaining part is pumped to the heat exchanger for heat exchange by circulating pumps Back cycle to Venturi mixer. The conversion rate of the reaction was 99% through analytical test.

[0034] It can be seen from the above examples that the higher the injection velocity, the better the mixing effect and the higher the corresponding conversion rate. But if it exceeds 70m / s, the circulation volume of the circulation system is too large, the energy consumption and production requirements of the circulation pump are too high, and the investment is uneconomical. Due to the precise match...

Images