CN1141718A

CN1141718A - Qiangluan-compound disinfectant for silkworm

Info

Publication number: CN1141718A
Application number: CN 95113712
Authority: CN
Inventors: 钟永玉
Original assignee: SHAANXI PROV SILKWORM INST
Current assignee: SHAANXI PROV SILKWORM INST
Priority date: 1995-07-31
Filing date: 1995-07-31
Publication date: 1997-02-05
Anticipated expiration: 2015-07-31
Also published as: CN1067518C

Abstract

The present invention relates to a compound disinfectant for silkworm-Qiangluan. It comprises tetrachloroglycoluril as main agent and adjuvant ammonium bicarbonate. Its technical key is as follows: synthesizing of tetrachloroglycoluril by using biformyl, urea and chlorine gas and compounding with ammonium bicarbonate according to the proportion of 1:9. The releasing quantity of effective chlorine of said invented product is up to 100%, and its effective rate for preventing and controlling silkworm disease is above 98%.

Description

Compound disinfectant Qiangli' an for silkworm

The invention relates to a disinfectant in the field of agricultural pesticides and pest repellents, in particular to a compound disinfectant Qiangluan for silkworms.

Silkworm diseases are the large enemies of sericulture, and cause 10-30% of losses to silkworm cocoon production every year due to silkworm diseases. Bleaching powder, lime and the like are widely adopted as disinfectants in the production of silkworm cocoons all the time, although the disinfection spectrum is wide and the disinfection effect is good, the disinfection effect is seriously influenced because the defects of easy moisture absorption and deliquescence, unstable drug property, no storage resistance, strong corrosivity and the like exist. In addition, some disinfectants cannot be used as the leading disinfectants due to high cost, great harm to people and low bactericidal spectrum.

The invention aims to overcome the defects in the prior art and develop the compound disinfectant Qiangluan for silkworms, which has the advantages of high efficiency, low toxicity, stability, small corrosion, low cost and convenient use.

The object of the invention can be achieved by the following measures:

the disinfectant Qiangluan for compound silkworm comprises two parts of main agent tetrachloroglycoluril and auxiliary agent ammonium bicarbonate, and the weight percentage between them is: 8-12% of tetrachloroglycoluril and 85-95% of ammonium bicarbonate. The main agent tetrachloroglycoluril is a chlorine disinfectant with the highest chlorine content in China at present, is originally used for disinfection and sterilization of military environments, drinking water sources and swimming pools, has low solubility (20 ℃, 55 mg/kg) in water, influences the practical effect and is gradually abandoned; the adjuvant is common chemical fertilizer ammonium bicarbonate, and the addition of the adjuvant fundamentally overcomes the defects of poor water solubility and poor practical effect of the tetrachloroglycoluril, so that the tetrachloroglycoluril is completely dissolved in water, and the release amount of effective chlorine is improved to 100 percent from the original 50 percent.

The sterilization mechanism of the compound disinfectant for silkworms, namely the Qiangluan, is mainly due to hypochlorous acid and chloramine which are generated when the tetrachloroglycoluril reacts with the ammonium bicarbonate. The ammonia generated by the hydrolysis of the ammonium bicarbonate can rapidly and thoroughly dissociate the four structural chlorine atoms in the tetrachloroglycoluril into water-soluble effective chlorine, so that the disinfection potential of the tetrachloroglycoluril is fully exerted. Strong chloramphor produces strong oxidizing bactericidal substance with hypochlorous acid and chloramine as main disinfectant component, and these oxidizing substances have high oxidizing potential and strong oxidizing effect on pathogenic microbe, so that the protoplasm protein is denatured and the pathogenic capability is lost.

During the hydrolysis of Qianglian, the following main reactions occur:② ③C₄H₂N₄O₂Cl₄＋4H₂O→4HOCl＋C₄H₆N₄O₂

PH＞8④

under the condition that no ammonia exists in the reaction, the tetrachloroglycoluril only depends on the hydrolysis reaction, the speed is slow, and only 50% of available chlorine is released, so that the maximum potential of sterilization can not be exerted.

Drawings and description of the drawings:

FIG. 1 is a schematic block diagram of glycoluril synthesis.

FIG. 2 is a schematic block flow diagram of glycoluril chlorination.

Fig. 3 is a schematic flow chart of the assembling block of the strong chloral.

The invention further details the production process flow of the strong chloran by combining the embodiment of theattached drawing:

the key technology for producing the strong chloran is to synthesize the tetrachloroglycoluril, and the main raw materials used in the synthesis are glyoxal, urea, chlorine and the like.

The synthetic route is expressed by the following chemical equation:

the synthetic route of glycoluril is shown in figure 1, the chlorination process of glycoluril is shown in figure 2, the total yield of glycoluril is increased to more than 77%, and the air leakage of equipment system is strictly prevented during the chlorination of glycoluril, so that the content of available chlorine is ensured to be more than 90%.

Ammonium bicarbonate (NH)₄HCO₃) The preparation is generally prepared by introducing carbon dioxide into ammonia water for saturation and then crystallizing, introducing conversion gas of synthetic ammonia into a concentrated ammonia water tower in the production of the fertilizer, absorbing the carbon dioxide in the conversion gas to obtain ammonium bicarbonate crystals, and separating.

The preparation is prepared by separately packaging the tetrachloroglycoluril and the ammonium bicarbonate, and because the solid tetrachloroglycoluril and the solid ammonium bicarbonate are mixed at normal temperature to produce violent reaction and release a large amount of irritant gas, the tetrachloroglycoluril and the ammonium bicarbonate are not folded and mixed together when not in use.

When in use, the tetrachloroglycoluril is sprayed or dipped, 10 g of tetrachloroglycoluril is added with a small amount of clear water to form paste, 50 kg of water is added for stirring, and a bag of 90 g of ammonium bicarbonate and 0.5 kg of fresh lime powder are added for stirringuniformly for use.

Compared with the prior art, the invention has the following advantages;

1. the compound disinfectant for silkworm uses the tetrachloroglycoluril as main agent and the ammonium bicarbonate as auxiliary agent, greatly improves the solubility of the tetrachloroglycoluril, has the effective chlorine release amount of 100 percent, and has the effective rate of preventing and treating silkworm diseases of more than 98 percent.

2. The strong chloran has stable chemical property, low toxicity, small dosage, high effect, low corrosivity, convenient packaging and transportation and low price.

Claims

1. The disinfectant Qianglaoan for silkworm is characterized by comprising main agent tetrachloroglycoluril and auxiliary agent ammonium bicarbonate, and the weight ratio is as follows:

8-12% of tetrachloroglycoluril and 85-95% of ammonium bicarbonate.

2. The disinfectant Qiangliang for silkworm according to claim 1, wherein Qiangliang has the following main reactions in the hydrolysis process:② ③

PH＞8④