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Method and device for producing cyclopropenyl compound

A technology for cyclopropene and complexes, applied in the field of producing cyclopropene compounds

Inactive Publication Date: 2003-11-26
ROHM & HAAS CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On a large scale, this process can take days, but may still leave significant amounts of unreleased cyclopropene

Method used

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  • Method and device for producing cyclopropenyl compound
  • Method and device for producing cyclopropenyl compound
  • Method and device for producing cyclopropenyl compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] This example compares alternative methods for releasing 1-MCP from 1-MCP / [alpha]-CD complexes into small volume environments.

[0071] The 1-MCP / α-CD complex that 50g powdery concentration is 0.14% is put into the 1000ml beaker that 250ml water is housed, also put a Mini Jet MN404 submersible pump (from IPSD company, San Diego, California) in the beaker obtained), the flow rate was set at about 200 L / hr. The system was then placed in a 36L Plexiglas containment chamber fitted with a bulkhead for the insertion of gas sampling syringes. The temperature was set at 22°C.

[0072] After the chamber is sealed, the pump is turned on, creating a fountain of flow in the beaker. The release of 1-MCP was detected by air sampling in the sealed chamber at regular intervals. Analysis was performed by gas chromatography with a flame ionization detector.

[0073] For comparison, the above procedure was repeated twice without using the pump. The first comparative experiment involve...

Embodiment 2

[0090] This example shows the effectiveness of gas sparging to accelerate the release of 1-MCP in a small scale environment.

[0091]50 g of powdery concentration of 0.14% 1-MCP / α-CD complex was put into a 600 ml beaker with 250 ml of water, and a 10 inch long section of bubble wall air diffuser (IPSD, San Diego, California) was placed in the beaker. company). The air diffuser was connected to a Tetratec(R) air pump (Tetra Corporation, Blacksburg, VA) by a flexible connecting tube. The flow rate of the pump was set at 100 L / hr. The system was then placed in a 36L Plexiglas containment chamber fitted with a bulkhead for the insertion of gas sampling syringes.

[0092] After the chamber is sealed, the pump is turned on and the gas is bubbled through the aqueous suspension. The release rate of 1-MCP was detected by regularly sampling the air in the sealed chamber. Analysis was performed by gas chromatography with a flame ionization detector. The results are shown in Table 2....

Embodiment 3

[0103] This example shows the release of 1-MCP into a large scale environment such as a fruit storage warehouse using gas sparging.

[0104] 3400 g of powdery concentration of 0.14% 1-MCP / α-CD complex was placed in a 20 L plastic container containing 11 L of water and a 56 inch long segment of a cell wall air diffuser (IPSD, Inc., San Diego, California). ). The air diffuser was connected to a Pro Gold(R) Profile 400 air pump by means of a flexible connecting tube. The air flow rate of the pump was set at 400 L / hr. The temperature was set at 22°C.

[0105] The container is covered and fitted with an outlet tube through which all escaping air must pass. After starting the pump, periodically sample the air exiting the vessel to determine the 1-MCP content. Analysis was performed by gas chromatography with a flame ionization detector. The results are shown in Table 3.

[0106] table 3

[0107] Time (hrs) Percentage of 1-MCP released

[0108] ...

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PUM

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Abstract

A device and method for generating cyclopropene gas comprising bubbling a gas through a vessel that contains water. A cyclopropene / cyclodextrin complex is added to the water to form an aqueous suspension. Cyclopropenes are used to inhibit the ethylene response in plants and plant products, such as fruits a nd vegetables. The device of the invention may treat small volume facilities as well as very large volume storage facilities, such as warehouses and the like. The bubbled gas rapidly and completely liberates the cyclopropene gas from its cyclodextrin carrier to provide a cost effective and efficient treatment against the ethylene response in plants.

Description

technical field [0001] The present invention relates to a new method and apparatus for producing cyclopropene compounds. The method and the so-called cyclopropene generator device make it possible to release gaseous cyclopropene into a specific closed atmosphere. The cyclopropene generator may be in the form of a container which provides a convenient means for delivering large quantities of cyclopropene compound to the plants to maintain the plants at as freshly harvested quality. The term "plant" is used herein in its conventional sense and includes woody stem plants such as trees and shrubs, and includes whole plants and any parts thereof such as field crops, pot plants, cut flowers (stems and flowers) and harvested fruit and vegetable. The cyclopropene compound and its derivatives such as methylcyclopropene can inhibit the reaction caused by ethylene in plants. Cyclopropene generators are especially suitable for places where plants are stored in closed large spaces such ...

Claims

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Application Information

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IPC IPC(8): A01N3/00A01N27/00B01J7/02A23B7/152B01J8/00B01J8/22B01J10/00C07C7/00C07C13/04
CPCB01J7/02B01J2219/185A01N27/00A01N3/00B01J10/002B01J2208/00017B01J2219/1943B01J2219/1946B01J8/22B01J8/0005B01J4/002A01N25/34A01N25/28A01N25/18A01N2300/00A01N25/10A01N25/00A01M13/00
Inventor E·C·考斯坦赛克L·A·威赛尔C·L·沃兹
Owner ROHM & HAAS CO
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