CN1067518C

CN1067518C - Qiangluan-compound disinfectant for silkworm

Info

Publication number: CN1067518C
Application number: CN95113712A
Authority: CN
Inventors: 王进; 肖乃康; 刘永奎; 王建芳; 付凤玲; 王代刚; 朱龙泉; 刘鸿
Original assignee: SHAANXI PROV SILKWORM INST
Current assignee: SHAANXI PROV SILKWORM INST
Priority date: 1995-07-31
Filing date: 1995-07-31
Publication date: 2001-06-27
Anticipated expiration: 2015-07-31
Also published as: CN1141718A

Abstract

The present invention relates to an agriculture use insecticide, particularly to a compound disinfectant for silkworms in the field of destructive insect dispelling agents, namely Qianglvan. The present invention is prepared from tetrachloroglycine urea used as primary agents and ammonium bicarbonate used as adjuvant agents. Qianglvan is produced by the key techniques: the tetrachloroglycine urea is synthetized by glyoxal, urea and chlorine gas; the finished products of Qianglvan are prepared from the tetrachloroglycine urea and ammonium bicarbonate by mixture, and the ratio of the tetrachloroglycine urea to ammonium bicarbonate is 1:9. The effective chlorine release quantity of the present invention reaches 100%, the effective ratio of controlling silkworm disease reaches more than 98%, and Qianglvan has the advantages of stable chemical property, less toxicity, less dosage, convenient transportation and low price.

Description

Compound disinfectant for silkworm

The invention relates to a sanitary disinfectant for silkworms, in particular to a compound disinfectant for silkworms, which is called Qiangliang in the market trade name.

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 avoid the defects in the prior art and develop the compound disinfectant 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 compound disinfectant for silkworms comprises two parts, namely main agent tetrachloroglycoluril and auxiliary agent ammonium bicarbonate, and the weight percentage of the main agent tetrachloroglycoluril and the auxiliary agent ammonium bicarbonate is as follows: tetrachloroglycoluril and ammonium bicarbonate 8-12: 85-95. 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 is mainly due to hypochlorous acid and chloramine generated when tetrachloroglycoluril reacts with 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

③

PH＞8

④

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 the attached 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,in the production of chemical fertilizer, the converted gas of synthetic ammonia is introduced into concentrated ammonia water tower to absorb carbon dioxide in the converted gas to obtain ammonium bicarbonate crystal, which is separated to obtain the product.

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 stirring uniformly for use. The measures of the above technical solution can also be taken as an example: namely the weight ratio of the components is as follows: tetrachloroglycoluril and ammonium bicarbonate = 10% to 90%, and the preparation method is the same as above.

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 compound disinfectant for silkworms is characterized by comprising main agent tetrachloroglycoluril and auxiliary agent ammonium bicarbonate, and the weight ratio is as follows:

tetrachloroglycoluril and ammonium bicarbonate = 10% to 90%