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1-methylcyclopropene preparation and preparation method thereof

A technology of methylcyclopropene and preparations, which is applied in the fields of botany equipment and methods, biocides, animal repellants, etc., can solve the problems of slow release of 1-MCP gas, instability of 1-methylcyclopropene sodium, increased Larger 1-MCP polymerization probability and other issues, to achieve the effect of efficient storage and release, convenient transportation and storage, and expanded range

Active Publication Date: 2012-05-09
西安鲜诺生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] In order to solve this problem, in some reports, several absorption bottles are connected in series to improve the absorption efficiency, but this will lead to an increase in the pressure in the system and increase the probability of 1-MCP polymerization
Chinese patent CN1663370A adopts the method of continuously or intermittently adding α-cyclodextrin aqueous solution to ensure the efficiency of absorption, but this greatly increases the complexity of the process
[0016] The fourth is the slow and complicated process of releasing 1-MCP gas from the complex during use
[0020] Chinese patent CN1721420A discloses a synthetic method of 1-methylcyclopropene sodium, and releases 1-MCP by adding water to the sodium salt before use, but it is currently recognized that 1-methylcyclopropene sodium is a very unstable The substance, at the reaction temperature reported in the patent, will be transformed into 1-MCP immediately after formation, and it is impossible to exist stably

Method used

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  • 1-methylcyclopropene preparation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Activated carbon is used as the preparation of the 1-MCP preparation of adsorbent, comprises the following steps:

[0050] 1) Activation of activated carbon:

[0051] According to the following ratio: mix 250mL of 0.3mol / L hydrochloric acid and 250mL of 0.1mol / L nitric acid, then add 100g of 60-80 mesh coconut shell activated carbon, stir at room temperature for 30 minutes and then filter, wash the filter cake with deionized water until neutral , After drying at 250°C, activate at 600°C for more than 1 hour. After the above steps, the metal ions and organic matter in the activated carbon can be removed.

[0052] 2) Adsorption of 1-MCP by activated carbon

[0053] According to the following ratio: 10mL liquid paraffin, 10g powdered sodium amide and 0.4g hexamethyldisilazane were added to the reactor, and 20g 3-chloro-2- Methyl propylene was added dropwise into the flask, and the generated gas passed through two washing bottles and an absorbing bottle successively unde...

Embodiment 2

[0064] Activated carbon is used as the preparation of the 1-MCP preparation of adsorbent, comprises the following steps:

[0065] 1) Activation of activated carbon:

[0066] According to the following ratio: mix 250mL of 0.3mol / L hydrochloric acid and 250mL of 0.15mol / L nitric acid, then add 100g of 60-80 mesh coconut shell activated carbon, stir at room temperature for 30 minutes and filter, and wash the filter cake with deionized water until neutral , After drying at 200°C, activate at 800°C for more than 1 hour. After the above steps, the metal ions and organic matter in the activated carbon can be removed.

[0067] 2) Adsorption of 1-MCP by activated carbon

[0068] According to the following ratio: 10mL liquid paraffin, 10g powdered sodium amide and 0.4g hexamethyldisilazane were added to the reactor, and 20g 3-chloro-2- Methyl propylene was added dropwise into the flask, and the generated gas passed through two washing bottles and an absorbing bottle successively unde...

Embodiment 3

[0072] Preparation and Application of Zeolite Adsorbed 1-MCP Preparation

[0073] Wash the 5A zeolite with a particle size of 2-4mm in water, dry it at 200°C and activate it at 750°C for 2 hours; then suspend the zeolite in water according to the proportion of adding 500g of zeolite to 1500mL of water;

[0074] The preparation of 1-MCP, the carrying and scrubbing of nitrogen are the same as in Example 1. The 1-MCP carried by nitrogen is passed into the water suspended with zeolite for adsorption. Gas 1.5g; add 0.002% p-hydroxyanisole by zeolite mass, mix thoroughly and store in airtight.

[0075] The release operation is as follows: a total of 1.3 g of gas is released after heating the zeolite preparation to 80° C., and the purity is 98.6% after detection by GC.

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Abstract

The invention discloses 1-methylcyclopropene preparation and a preparation method thereof. A porous carrier suspending in preserving liquid is included. 1-methylcyclopropene is adsorbed in the porous carrier. The preserving liquid further contains polymerization inhibitor, the mass of which is 0.0001-0.1% of the mass of the porous carrier. According to the 1-methylcyclopropene preparation provided by the invention, the 1-methylcyclopropene is adsorbed by utilizing the activated porous carrier in a liquid environment; the mass of the adsorbed 1-methylcyclopropene is above 8% of the mass of the pours carrier; furthermore, the 1-methylcyclopropene after being adsorbed is released only by being heated; and the 1-methylcyclopropene preparation is a reagent product, which is simple for preparation and low in cost, thus, the 1-methylcyclopropene is effective to preserve and release.

Description

technical field [0001] The invention belongs to the technical field of preservation and release of 1-methylcyclopropene, and in particular relates to a 1-methylcyclopropene preparation and a preparation method thereof. Background technique [0002] Ethylene gas, one of the most common plant hormones, causes overripe and spoilage of fruits and vegetables. The ethylene released by fruits and vegetables is called endogenous ethylene, and the rest is exogenous ethylene. The ethylene in these two pathways can combine with specific receptor points of fruits and vegetables to cause them to overripe and rot. [0003] 1-Methylcyclopropene (abbreviated as 1-MCP) is an efficient and safe ethylene blocker, which can preferentially bind to the ethylene receptors of plants, and its binding ability is 10 times that of ethylene, so as to achieve freshness preservation and prevent fruit from falling , The effect of maintaining the taste. In addition, 1-MCP can also be used for drought resi...

Claims

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Application Information

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IPC IPC(8): A01N25/08A01N27/00A01P21/00
CPCA01N27/00A01N25/08A01N25/18
Inventor 王慎谦
Owner 西安鲜诺生物科技有限公司
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