61results about "Sulfur-halogen-hydrogen-oxygen compounds" patented technology

Provided is a visible active photocatalyst of formula BiOX wherein X=P or S and process of preparation and use thereof. Use of the catalyst is demonstrated in the photocatalytic degradation of pharmaceutical drug pollutants and pollutant dyes using solar radiation or artificial radiation.

Apparatus, materials, and methods for removing ammonia from fluid using metal hydroxides (e.g. zinc hydroxide) and metal cation loaded media (e.g. zinc loaded ion exchange resins); the metal hydroxides and metal cation loaded media may be regenerated with a weak acid (pK_a between 3 and 7). Alternatively, ammonia is removed from fluids by using H₂SO₄ and ZnSO₄ and metal cation loaded media; the metal cation loaded media may be regenerated with H₂SO₄ and ZnSO₄; the ammonia containing H₂SO₄ and H₂SO₄ may be concentrated as necessary to form (NH₄)₂SO₄.ZnSO₄.6H₂O (ammonium zinc sulfate hexahydrate) crystals. These crystals are removed from the mother liquor and heated to temperatures exceeding 200° C. releasing NH₃ and H₂O vapor upon the decomposition of the crystals.

The invention discloses a method for treating tail gas generated in chlorination reaction by using thionyl chloride. The existing traditional tail gas treatment method is costly due to a large amount of alkali consumption, and the pressure on environmental protection is high due to the final generation of a large amount of waste water containing heteroions. In the present invention, by controlling the amount of water, the hydrogen chloride in the tail gas is subjected to two-stage absorption with water, and the concentrated hydrochloric acid with a hydrogen chloride content close to saturation and a small amount of sulfur dioxide is obtained through the first-stage absorption; the second-stage absorption: after the first-stage absorption, the The exhaust gas is subjected to the second-stage absorption, and the added water is not discharged to obtain dilute hydrochloric acid containing a small amount of hydrogen chloride and a small amount of sulfur dioxide. The dilute hydrochloric acid is used as the raw material water for the first-stage absorption; after the above-mentioned secondary absorption treatment, it is then treated with alkali or alkali The third level of water absorption is used to absorb sulfur dioxide in the tail gas to obtain a relatively pure aqueous solution of sodium sulfite. The invention has high treatment efficiency, complete tail gas absorption, and reduces the pressure on environmental protection.

Described herein are methods for the bromine-facilitated synthesis of fluoro-sulfur compounds, that include SF₄, SF₅Cl, SF₅Br and SF₆. The methods described herein generally require lower temperature and pressure, produce higher yields, require less time, do not use corrosive or costly reactants and solvents that are commonly used in the synthesis of the fluoro-sulfur compounds, and do not produce deleterious waste products when compared to previously-used methods.

Disclosed herein is an apparatus for continuously producing and pelletizing gas hydrates. The apparatus includes a gas supply unit, a water supply unit and a reactor. Gas and water are respectively supplied from the gas supply unit and the water supply unit into the reactor. The gas and water react with each other in the reactor. The reactor includes a dual cylinder unit which forms a gas hydrate in such a way as to squeeze a slurry of reaction water formed by the reaction between the gas and water. The dual cylinder unit includes an upper cylinder, a lower cylinder and a connection pipe which connects the upper cylinder to the lower cylinder. The connection pipe has passing holes through which the reaction water in the reactor flows into and out of the connection pipe.

The present invention relates to a composition comprising water, more than 30% w/w of calcium hydroxide, and >0.2% w/w dispersant. A process for preparing such a composition is also disclosed. The composition which can be in the form of a 45-55% concentration lime slurry is particularly useful for converting concentrated ammonium lignosulfonate into calcium lignosulfonate, for converting ammonium lignosulfonate into low sulfate calcium, potassium, sodium, or magnesium lignosulfonate and mixtures thereof, for removing soluble sulfate from concentrated sodium, potassium, ammonium or magnesium lignosulfonate or for treating a weak liquor obtained from the pulp and paper industry.

The production of polyaluminum hydroxychlorosulfates (PACS) suitable for effective use as flocculants and coagulants in water treatment is described. The product is a fluid, clear solution that is stable with respect to precipitation and gelling for extended periods of time. Key features of the process include: i) the production of a PACS solution of about 12-16% Al₂O₃ and about 40-60% basicity at moderate temperatures (50-60° C.) using a zerovalent aluminum source, such as aluminum powder, ii) the addition of an alkali metal or alkali earth metal base at low temperatures (20-30° C.) to produce PACS products ranging from 9-12% Al₂O₃ with basicities ranging from 70-80%, iii) the addition of an alkali metal base at low temperatures without the use of high shear mixing, iv) a PACS product that does not contain significant amounts of the Al₁₃-mer Keggin complex , v) a product with greater than 80-95% of the aluminum polymers bimodally distributed in the range of 20,000-40,000 Daltons and 135-750 Daltons, and vi) the formation a PACS whereby greater than 95% of the sulfate is bound to aluminum and is contained in the aluminum polymers distributed in the range of 20,000-40,000 Daltons.

The invention relates to a dechloridation device and process in a chlorinated paraffin production process. The dechloridation process comprises the following steps: connecting a tail gas discharge pipe of a chlorination reaction kettle with a dechloridation kettle; introducing the chlorination tail gas produced by the chlorination reaction into hot liquid wax to perform a dechloridation reaction;eliminating the gas after the dechloridation reaction from a hydrogen chloride outlet; and eliminating the generated liquid material containing the liquid wax and using the eliminated liquid materialcontaining the liquid wax as a raw material for continuous chlorination reactions. The process provided by the invention is a gas-gas two-phase material separation technology, can improve the chlorine utilization rate and the hydrogen chloride purity and remove impurities in the liquid wax and improve the product quality of chlorinated paraffin, and has tremendous economical benefits and practicability. By adopting the technology, the chlorine content in hydrogen chloride is less than or equal to 0.1%, the hydrogen chloride purity is improved to satisfy the use of a chlorosulfonic acid device; and meanwhile, the quality of liquid wax is improved, and the improvement of comprehensive quality of the product is facilitated.

The invention relates generally to processes for the production of high-basicity and ultr-high basicity polyaluminum chlorides including aluminum chlorohydrate. The processes can produce products of a wide range of basicities and are particularly useful in producing high basicity products. The process can produce a wide range of solution concentrations and are particularly useful in producing high solution concentrations. The processes described generate high purity products, which are free of by-product salt(s). The processes described herein can also be utilized to produce enhanced efficacy polyaluminum chlorides including aluminum chlorohydrate. When compared to conventional processes for manufacturing these compounds the processes disclosed herein are unique in so far as the disclosed processes do not require aluminum metal as a starting material. The products of the processes are suitable in applications including water purification, catalysts, and antiperspirants. In addition, the invention is directed to the products prepared by the processes described herein.

A process for producing BrSF₅ includes providing a first reactant including a metal fluoride of fluorine and a metal M selected from the group consisting of alkali metals, alkaline earth metals, and Ag, providing a second reactant including BrF₃, combining the first reactant and the second reactant to form a mixture, wherein the first reactant and the second reactant are allowed to contact for a period of time sufficient to produce MBrF₄ in an amount stoichiometrically equivalent to a quantity of BrF₃, and providing a third reactant including SF₄, wherein the third reactant reacts with MBrF₄. The process for producing BrSF₅ can further include providing a fourth reactant including Br₂, wherein the fourth reactant is provided before, during and/or after providing the first reactant, the second reactant and/or the third reactant. BrSF₅ is produced in a yield of from about 50% to about 99.99% based on the amount of SF₄.

The invention relates to a method for continuously synthesizing trifluoroacetyl chloride and sulfuryl fluoride, which comprises the following process: continuously introducing sulfur trioxide and trifluorotrichloroethane (F113a) into a reaction rectifying tower containing a catalyst and a filler thorough the lower part in the tower according to a mol ratio of 1:1, wherein the temperature of the tower is controlled to range between 120 DEG C and 130 DEG C, and the reflux ratio at the top of the tower is 2.5-3; introducing tower bottoms into a sulfuryl chloride separating tower for rectification and separation, wherein the tower temperature is 145-150 DEG C, and the reflux ratio is 0.5-1.0; returning pyrosulfuryl chloride in the separating tower to the middle upper part of the reaction rectifying tower, heating the sulfuryl chloride rectified off from the top of the tower to 150 DEG C, and then introducing the rectified sulfuryl chloride and preheated recycled and newly-added hydrogen fluoride gas into a reactor containing a palladium/charcoal catalyst, wherein the reaction temperature is controlled to range between 150 DEG C and 160 DEG C; separating out unreacted hydrogen fluoride from the reaction product through a cold trap, and returning to the reactor for further use; and then absorbing and separating hydrogen chloride through a falling film, drying, compressing, and condensing to obtain the sulfuryl fluoride. The invention has the advantage of easy acquisition of raw materials, and the sulfuryl chloride byproduct can be directly used for the synthesis of sulfuryl fluoride.

A process for synthesizing high-concentration chlorosulfonic acid from low-concentration SO2 features that the SO3 generated by directly decomposing the fuming sulfuric acid by the fume converted from sulfuric acid and the hydrogen chloride are used as raw materials. Its advantages are wide range of the concentrations for hydrogen chloride, and little environmental pollution.

The disclosure herein relates to a lithium ion conducting electrolyte. This electrolytic material has improved ionic conductivity. The material disclosed herein is an amorphous compound of the formula Li_xSM_wO_yN_z wherein x is between approximately 0.5 and 3, y is between 1 and 6, z is between 0.1 and 1, w is less than 0.3 and M is an element selected from B, Ge, Si, P, As, Cl, Br, I, and combinations thereof. The material can be prepared in the form of a thin film. The electrolyte material can be used in microbatteries and electronic systems.

Alunite type compound particles represented by the following general formula (I) and having a specific value of D₇₅/D₂₅ when D₂₅ is the particle diameter of particles which account for 25% of the total and D₇₅ is the particle diameter of particles which account for 75% of the total in the cumulative particle size distribution curve measured by a laser diffraction method:

M_a[Al_1-xM′_x]₃(SO₄²⁻)_y(OH)_z.mH₂O  (I)

wherein M is at least one cation selected from the group consisting of Na⁺, K⁺, NH₄⁺ and H₃O⁺, M′ is at least one cation selected from the group consisting of Cu²⁺, Zn²⁺, Ni²⁺, Sn⁴⁺, Zr⁴⁺ and Ti⁴⁺, and a, m, x, y and z satisfy 0.8≦a≦1.35, 0≦m≦5, 0≦x≦0.4, 1.7≦y≦2.5, and 4≦z≦7, respectively.

The above particles of the present invention have a small average particle diameter, are spherical, disk-like or hexagonal and have an extremely narrow particle size distribution.

The invention relates to a chlorosulfonic acid production process and equipment thereof, which belong to the technical field of chemical process. In the process, the tail gas of a benzyl chloride device and a chlorcosane device reacts with SO3 gas from a niacin evaporator. The equipment of the chlorosulfonic acid production process comprises a synthesizing tower, an acid-washing tower and a tail gas absorption tower, wherein the synthesizing tower is connected with a treating column; the treating column is connected with a gas buffer slot; the gas buffer slot is connected with an HCL drying washer by two HCL fans; and the HCL drying washer is connected with the benzyl chloride device and the chlorcosane device. The invention sufficiently utilizes the waste gas as the raw material, thereby saving resources, reducing pollution and reducing cost.

Disclosed is a method for an energy-efficient improvement in the production of sulfur hexafluoride, and eliminates the generation of other byproducts. The process is an oxidative fluorination of sulfur tetrafluoride by CoF₃/F₂, where CoF₃ is solid stationary phase that can be regenerated.

A separation, purification and recovery method of SF₆, HFCs or PFCs is disclosed, which comprises a step for forming a gas hydrate including components in addition to SF₆, HFCs or PFCs. It is possible to separate and recover fluoro-gas at a much lower cost as compared to a conventional method for thereby obtaining an economical effect and preventing an emission of SF₆, HFCs or PFCs which corresponds to Non-CO₂ having a higher earth warming index, which leads to preventing an earth warming phenomenon. So, the present invention might be widely applied.

A process for producing an ammonium polythiomolybdate of the formula (NH₄)₂Mo₃S₁₃.nH₂O where n is 0, 1 or 2 in which an aqueous ammoniacal molybdate solution is reacted with hydrogen sulfide gas in a closed system at superatmospheric pressure until the H₂S is no longer absorbed by the solution to form a slurry of solid ammonium tetrathiomolybdate containing a portion of the starting molybdenum in a mother liquor containing the balance of the molybdenum and thereafter heat soaking the reaction product in the presence of elemental sulfur to form the desired product.

The present invention is process and apparatus for preparing chlorosulfonic acid. The process includes the following steps: pre-treating high purity hydrogen chloride and excessive sulfur trioxide gas, and synthesizing in a synthesizing tower; absorbing the gaseous resultant with the sprayed liquid resultant and reacting to produce small drop as the coarse liquid chlorosulfonic acid product; further reacting the coarse liquid chlorosulfonic acid product with hydrogen chloride gas in a refining tower to operate product, and absorbing un-reacted gas to reach exhaust standard. The present invention has the advantages of high product converting rate, small size of cooler, compact structure of synthesizing tower, high product purity, etc.

The invention relates to a method for inhibiting generation of chlorosulfuric acid in a thionyl chloride preparation process. The method comprises the following steps: feeding a raw material gas mixture prepared from sulfur dioxide, sulfur dichloride and chlorine to a catalytic reactor after pre-heating, and reacting to obtain thionyl chloride; and preheating the gas mixture to 120-180 DEG C. Chlorosulfuric acid in a crude product thionyl chloride is inhibited within 1% from 2%, so that the quality of the crude product thionyl chloride is greatly improved; reduction of the content of chlorosulfuric acid in subsequent refined products is facilitated; and the generation condition through chlorosulfuric acid is avoided.

The invention provides a sulfuryl fluoride preparation method using sulfuryl chloride as a raw material by two-stage fluorination reaction, the sulfuryl fluoride preparation method has the advantages of simple technology and equipment, easy enlarging production, high product purity and the like, and prepared sulfuryl fluoride can be used as a fumigant to replace methyl bromide.

A method of preparing a composition comprising dry mixing commercial grade alumina and a solid sulfating agent to form a mixture and calcining the mixture to form a sulfated alumina support.