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1-methyl cyclopropene stable solution, preparation method thereof and preparation

A technology of methylcyclopropene and stabilizer, applied in the field of preparation method and preparation, 1-methylcyclopropene stabilized solution, can solve problems such as low solubility, and achieve the effects of simple process, convenient use and low cost

Active Publication Date: 2007-02-07
山东营养源食品科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] A kind of 1-methylcyclopropene stable solution will bring many conveniences to the production, use and product promotion of preparations, because the instability of 1-methylcyclopropene itself and its solubility in many solvents are relatively Low reason, still do not have the report of 1-methylcyclopropene stable solution and its preparation both at home and abroad

Method used

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Examples

Experimental program
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Effect test

example 1

[0013] The inventor discloses a kind of preparation method of 1-methylcyclopropene gas in the patent application cyclopropene composite antistaling agent and its preparation method that the application number is 20051004505.7, that is, a mechanical stirrer, a constant pressure titration funnel, a thermometer are equipped , into the three-neck flask of the condenser tube, feed N 2 , add 1000mL of paraffin oil and 100g of 90% sodium amide, start electric stirring, heat the reaction bottle with a heating mantle, when the temperature rises to 50°C, add 260g of 2-methyl-1,2-dibromopropane dropwise, and finish adding in 2h. Continue to stir for 6 hours after the dropwise addition, and keep the temperature in the bottle at 50-60°C to generate 1-methylcyclopropene gas. 450g and 50g of pentaerythritol in an absorbent bottle of 1000g in total, and the absorbent bottle was placed in a cooling circulation pump at a temperature of -20°C to obtain 1050g of 1-methylcyclopropene solution. Af...

example 2

[0015] The method provided by M. Magid et al. in "Journal of Organic Chemistry" 1971, volume 36 (M.MAGID.J.Org.Chem.1971.vol36.pp1320-1321). N 2 , add 1000mL of paraffin oil and 120g of 90% sodium amide, start electric stirring, heat the reaction bottle with a heating mantle, when the temperature rises to 50°C, add 140g of 2-methyl-3-chloropropene dropwise, and finish adding in 2h. Continue to stir for 6 hours after the dropwise addition, during which the temperature is kept at 50-60°C to generate 1-methylcyclopropene gas, which is filled with 1000g of ethanol, 50g of cyclohexane and 950g of propenyl alcohol in total through the condenser tube and gas washing bottle. In the bottle of 2000g absorbent (the absorbent bottle is placed in the cooling circulation pump, the temperature is -15~-25°C), and 2195g of 1-methylcyclopropene solution is obtained. After testing, the content of 1-methylcyclopropene is 1.84%, and the yield is 47%. Add 75 g of 4-tert-butyl 1.3-benzenediol to ob...

example 3

[0017] Synthesize as example 2, the 1-methylcyclopropene gas that generates, through condensing tube, washing bottle, import in the bottle that fills the absorbent of 1.2-propylene glycol 1500g (absorbent bottle is placed in the cooling circulation pump, and temperature is- 30~-35°C), and 1725 g of 1-methylcyclopropene solution was obtained. After detection, the content of 1-methylcyclopropene was 2.64%, and the yield was 53%. Adding 5 g of 1.2.4-glucinol, 1730 g of 1-methylcyclopropene stable solution was obtained, and the content remained unchanged through detection.

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Abstract

The invention discloses a 1-methyl cyclopropenyl stable solution and preparing method in the fine chemical domain, which is characterized by the following: adopting monobasic, bibasic and polyatomic alcohol as absorbent; adding specific stabilizer to produce stable solution with 0.5-3% 1-methyl cyclopropenyl at low temperature and indoor temperature; fitting for reserving fruit and vegetable as well as flowers.

Description

technical field [0001] The invention belongs to the technology of preservatives for fruits, vegetables and flowers, in particular to a stable solution of 1-methylcyclopropene, its preparation method and preparation. Background technique [0002] 1-Methylcyclopropene is an excellent fresh-keeping agent for fruits, vegetables and flowers discovered in recent years. It can not only block the generation of ethylene in fruits, vegetables and flowers, delay aging, but also prevent the influence of exogenous ethylene on fruits, vegetables and flowers, and reduce the Flower respiration strength, inhibition of enzyme activity to achieve the effect of freshness, with high efficiency, low toxicity, easy to use and so on. Its dosage is extremely low, generally at the ppm level (one part per million), or even at the ppb level (one part per billion), which can achieve very good results. [0003] 1-Methylcyclopropene has been widely used in the world as a fresh-keeping agent for fruits, v...

Claims

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Application Information

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IPC IPC(8): A23B7/154A01N3/02
Inventor 王庆国高风霜谢新记
Owner 山东营养源食品科技有限公司
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