90 results about "Mercuric ammonium chloride" patented technology

Disclosed is a low-mercury catalyst for acetylene hydrochlorination. Mercuric chloride is carried on activated carbon. Raw materials comprise, by weight, 100 parts of activated carbon, 4-5 parts of mercuric chloride, 8-10 parts of total essential assistant, 1-5 parts of total non-essential assistant, wherein the essential assistant comprises 2-5 parts of bismuth chloride, 1-5 parts of cerium chloride, 1-5 parts of barium chloride and 2-5 parts of copper chloride; and the non-essential assistant comprises at least one of potassium chloride, phosphoric acid, zinc chloride and cuprous chloride. After being subjected to surface subtraction and drying on acid and oxidizing conditions, activated carbon is in reflux treatment with urea solution; and the catalyst can be prepared by soaking the treated activated carbon with HgC12 dissolved in hydrochloric acid and assistant solution sufficiently after urea is removed by steps of heating, washing the activated carbon with hydrochloric acid and finally drying the same. The carrying capacity of mercuric chloride in the catalyst is lower so that cost for the catalyst is reduced and consumption of mercury resources is decreased. Furthermore, activity and stability of the low-mercury catalyst are much higher than those of the existing high-mercury catalyst, and reforming rate and selectivity of reaction of vinyl chloride can be 99.7% and be higher than 99.8%. Accordingly, the low-mercury catalyst for acetylene hydrochlorination is suitable for industry production and is environment-friendly.

Systems are disclosed for making and using micro-porous particulates at least partially composed of metal sulfides, particularly alkaline earth metal and transition metal sulfides, as sorbents for removal of mercury from flue gas. Calcium sulfide micro-porous powders derived from the high temperature reduction of calcium sulfate and calcium sulfite are disclosed to be reactive substrates for a group of sorbents for adsorption of mercury from coal combustion flue gases produced by the utilities industry, as well as from natural gas and gaseous and liquid hydrocarbons. The sorbents are useful for cost-effectively adsorbing elemental mercury and oxidized mercury species such as mercuric chloride from flue gases, including those containing acid gases (e.g., SO.sub.2, NO and NO.sub.2, and HCl), over a wide range of temperatures.

The invention discloses a method for extracting selenium from mercury-selenium acid mud waste; elemental selenium is refined by a wet method under the condition of normal temperature, impurities in the mercury-selenium acid mud are removed, equipment is simple in requirements and easy to operate, and used chemical reagents basically have no pollution to the environment. Strong oxidability of hydrogen peroxide makes selenium oxidized into high-valence ions to go into a solution system, and a lot of heat is released for the system; addition of sodium chloride provides chlorine ions for the reaction system; a main impurity mercury is removed in a manner of a white precipitate ammoniated mercuric chloride; strong reducibility of hydrazine hydrate makes the high-valence selenium sufficiently reduced into elemental selenium. Results show that the content of elemental selenium reaches 90% or more and the recovery rate also reaches up to 90% or more.

The invention relates to a method for measuring total iron, and belongs to the field of analysis and detection. The method comprises the following steps: S1, fusing an iron-containing test sample at high temperature by using alkali, and then leaching by using acid; S2, heating a leaching solution to be nearly boiled, dropping tin chloride (50-150g / L) to until the light yellow color appears, and cooling; S3, dropping a titanium trichloride solution until the tungsten blue color appears by taking sodium tungstate as an indicator; S4, dropping several drops of copper solutions, and shaking to fade the tungsten blue color; S5, adding a right amount of sulfuric-phosphorous mixed acid (2+3), and titrating until the purple color as an end point appears by taking sodium diphenylamine sulfonate (4-10g / L) as an indicator and using a standard potassium dichromate solution. The method disclosed by the invention substitutes that the traditional total iron measurement in which mercuric chloride needs to be applied, so that the environmental pollution is reduced, the reaction is easily controlled by adding the copper solution and mixed sulfuric acid, end point discoloration is relatively obvious, and the method is relatively accurate, fast, simple and convenient.

The invention discloses a fluorescence probe based on RB (rhodamine B), TEPA (tetraethylenepentamine) and PITC (phenyl isothiocyanate) as well as a preparation method and an application of the fluorescence probe. The preparation method comprises specific steps as follows: RB and TEPA react firstly to form a spiro amide structure with a stable property, a nitrogenous bridged fragment is introduced, and the mixture reacts with PITC to introduce sulfur atoms. By virtue of thiophilicity of mercuric ions, each molecule of a novel RB-phenylthiourea derivative RPTU obtained through the scheme can be bound with four mercuric ions, so that higher selectivity and detection sensitivity are achieved; and the fluorescence probe molecules can perform detection in a neutral buffer solution particularly an aqueous phase, can be further used for detecting the mercuric ions of mercuric chloride, and has better practicability.

The invention relates to an isolated culture method for peony ovules. After peony ovaries which are fertilized for 15 to 90 days are disinfected by mercuric chloride, the ovules are taken out and divided into a 15-to-48-day ovule group and a 49-to-90-day ovule group; the 15-to-48-day ovule group is inoculated into MS culture medium, cultured in the dark for 3 to 15 days, then inoculated into MS culture medium II, cultured in the dark for 10 days and then cultured in light for 7 to 27 days; afterwards, the 15-to-48-day ovule group is inoculated into the MS culture medium II again and cultured in light for 8 to 28 days, so that mature peony seeds I are obtained; and after being first cultured in the dark for 10 days, the 49-to-90-day ovule group is cultured in light for 7 to 27 days, then inoculated in the MS culture medium II again and cultured in light for 8 to 28 days, so that mature peony seeds II are obtained. The isolated culture method for peony ovules can be used in the isolatedresearch on peony embryo development, and solves the problems of the early abortion of the embryos of good-looking peony varieties and the abortion of distant somatic hybrid peonies, and by way of ovule culture, the improved research on peony varieties can be carried out as well.

The invention relates to a culture method for directly obtaining a plant by a pepper anther and a culture medium, and belongs to the field of plant cell engineering. The culture method comprises the steps: (1), selecting a flower bud with microspores in a mid-late uninucleate stage; (2), soaking the flower bud by alcohol with the concentration being 70 percent for 0.5-1min and mercuric chloride with the concentration being1.2 percent for 8-15min, washing for 3-5 times by using sterile water, sucking water to be dry by using sterile filter paper to obtain a sterile anther in the mid-late uninucleate stage; (3), floating the sterile anther in the mid-late uninucleate stage in the liquid culture medium, carrying out dark shake culture for 20-25 days, and then carrying out illumination shake culture; (4), after carrying out illumination shake culture for 10-20 days, transferring a formed cytoledon-stage embryo to an MSO solid culture medium for being cultured, and growing into a normal plant. The culture method disclosed by the invention has the advantages that (1), the induction frequency of a normal embryo is greatly increased, the regeneration frequency of the normal plant is remarkably increased; (2), the operation process is simple, and the plant can be directly obtained from microspores freely dispersing in the liquid culture medium; (3), the culture method is suitable for multiple types of peppers such as cow-horn peppers, capsicum, line peppers and sweetbell redpeppers.

The invention provides a method for reproducing purple yam seedlings by tissue culture. The method takes a purple yam tender stem tip of 1.0cm as an explant and comprises the following steps: sterilizing the explant by 75% alcohol and a 0.1% mercuric chloride solution; inoculating the explant on an initial culture medium MS0; after the stem tip is survived, treating a regenerated tender stem tip of 0.5-1.0 mm; carrying out stem tip induction culture, stem tip subculture multiplication culture and rooting culture with different culture media at different periods to obtain a purple yam bottle seedling; after the seedling height is about 2cm, transplanting the bottle seedling into a nutrition bowl substrate for hardening; and culturing for 50-60 days till the seedling grows to be as high as 10cm, thereby obtaining the purple yam seedling. A stem tip induction multiplication culture medium is formed by MS, 0.5mg / L of 6BA and 0.1mg / L of NAA; a rooting culture medium is formed by 1 / 2MS, 0.2mg / L of NAA and 0.2g / L of Ac; each culture medium contains 45g / L of edible sugar and 6g / L of agar, and the pH of each culture medium is 5.7. According to the method, a germination accelerating manner is simple and convenient and the germination speed is high; a detoxification manner is simple and rapid and the detoxification rate is high; the variety is high in quality and pure; with the method, the industrialized production of purple yam tissue culture seedlings and the popularization of breed improvement can be realized.

The invention provides a preparation method for a CdHgTe / CdS core-shell quantum dot. The preparation method comprises the following steps: A, preparing a potassium tellurium hydride solution which is prepared by reducing tellurium powder through potassium borohydrate; B, weighing a certain proportion of cadmium chloride and mercuric chloride crystal, dissolving the mixture with deionized water, and performing metered volume to obtain a mixed solution of cadmium chloride and mercuric chloride; C, adding quantified thioglycolic acid into the mixed solution; D, adjusting the solution with a potassium hydroxide solution to enable the solution to have a specific pH value; E, after inert gas is introduced for oxygen removal, adding the new prepared potassium tellurium hydride solution; F, irradiating through a UV light, and detecting through fluorescence spectrum analysis; G, adding isopropanol for purification, and drying through a freezer dryer to obtain CdHgTe / CdS core-shell quantum dot solid powder. According to the preparation method, the process is relatively simple; process parameters are easy to control; raw materials are inexpensive, the synthesized quantum dot is small in particle size and relatively uniform in particle size distribution, and the fluorescence quantum yield is relatively high.

The invention discloses application of mercuride in preparing antivenom medicaments, aiming at solving the problems of unobvious treatment effect, high death rate and the like in the prior art, wherein the mercuride is one of mercuric sulfide, mercuric oxide, mercuric sulfate, mercuric chloride and the like. Because the main component in the mercuride is heavy metal which has the characteristic of inactivating all proteins, the mercuride has fatal destructive effect on all the proteins; and snake venom is formed by mixing dozens of poisonous proteins, therefore, the mercuride can inactivate the poisonous proteins in the snake venom so as to enable the poisonous proteins to lose activity (toxicity), thereby achieving the purpose of resisting the snake venom.

The invention discloses a tissue culture method capable of increasing a quantity of garlic growing point differentiated adventitious buds. The method specifically comprises the following steps that S1, disinfection is performed: selected garlic cloves are pretreated, then are subjected to disinfecting with alcohol and mercuric chloride in sequence, and 0.5-1.0 mm tissues are stripped at the top ends of stem tips to obtain explants for later use; S2, a culture medium is prepared: an induction culture medium is prepared for later use; S3, the explants are grafted: the explants are grafted into the induction culture medium, and induction culture is performed under the conditions of sterile culture and illumination to obtain stem tip meristem seedlings; and S4, subculture and induced differentiation are performed: after new garlic leaves grow from the adventitious buds, subculture is performed, differentiation and growth of the adventitious buds are induced, and finally bud clusters are differentiated. The method is simple to operate, and under the same culture medium culture and culture conditions, only new leaves need to be stripped continuously, and a stem tip meristem is damaged and stimulated; meanwhile, the propagation coefficient is high and can generally reach 4-5 or higher; and a large quantity of adventitious buds are induced in one step, the time is short, the efficiency is high, and the production cost is effectively reduced.