33results about "Sulfo/sulfonyldioxy group formation/introduction" patented technology

A process and equipment assembly for reacting a substituent precursor with a cyclodextrin starting material to provide a raw product comprising a cyclodextrin derivative and 1% or less of an initial amount of the substituent precursor is provided. The process of the present invention provides cyclodextrin derivatives in substantially shorter time and with fewer side products than previous processes that utilize substantially the same starting materials.

A method and a device for the sulfonation or the sulfation of organic liquid raw materials with an S03 / air mixture and other reaction gases in order to perform rapid, highly exothermic gas-liquid reactions in conventional thin-layer falling-film reactors are disclosed. The introduction of the S03 / air mixture occurs through several feed locations, which are located within (along) the reaction tube or reaction tubes or in the annular gap of annular-gap falling-film reactors. High peak temperatures, undesirable byproducts, worsening of the color and local oversulfation or oversulfonation, which leads to side reactions, are largely avoided.

The invention relates to a novel process for cycle-absorbing and reusing sulfonated tail gas, belonging to the technical field of surfactant producing processes and aiming at providing a method which has reasonable design and simple operation and is suitable for the cycle-absorption and recovery of various sulfonated SO3 tail gases and a relative processing system. The technical solution of the invention comprises the following steps: A. mixture material resulted from the contact reaction of SO3 and organic material 1 in a sulfonator enters a gas liquid separation device; B. after the supplementary heating, the separated SO3 gas reacts with the organic material, and then a corresponding sulfonated product is generated; C. the sample of the generated sulfonated product is output for test; material discharge can be carried out upon the qualification, and the residual SO3 gas is discharged after the demisting; otherwise, the sulfonated product and the SO3 gas are subjected to a contact reaction again; and D. the residual SO3 gas output to a demister is output by the demister after being demisted, and then discharged after tail gas treatment.

The present invention relates to a gas phase SO3 film-scraping sulfonating technology which belongs to the technical field of production technology which prepares anionic surfactant by using gas phase SO3 film-scraping sulfonating liquid organic materials. The invention is carried out according to the following steps: A: liquid SO3 is vaporized to gas phase SO3, the gas phase SO3 is sucked in a mixer shaft through a turbo-blower, the gas phase SO3 is mixed with inert gases recycled in a sulfonating reactor to reaction gas with the volume concentration being 0.1 to 10 percent, and then the reaction gas goes into a reaction cylinder body through reaction gas distribution holes on the upper part of the scraping plate shaft; B: the organic materials go into the sulfonating reactor and downwards flow along the inner wall of the reaction cylinder body, a scraping plate is rotated along with the mixer shaft under the action of a transmission system, the organic materials are continuously suffered with film scaping-spread coating-film scaping in the inner wall of the reaction cylinder body, the organic material are alternately updated and uniformly coated on the inner wall of the reaction cylinder body, and the organic materials are completely contacted and reacted with the reaction gas which goes from the reaction gas distribution holes to form reaction products. The design of the technology is reasonable, and the invention can be suitable for sulfonating or sulphating materials with various viscosities.

A process produces a sulfonated solid particle by burning sulfur to yield gaseous sulfur dioxide, subjecting the gaseous sulfur dioxide to catalytic oxidation to yield gaseous sulfur trioxide, and sulfonating a dry powdery or granular solid particle with the gaseous sulfur trioxide in a gas phase-solid phase reaction.

The present invention relates to a sulfonated tail gas recycling method and a sulfonated tail gas recycling system. The purpose of the present invention is to provide the method and the system, wherein the method and the system have characteristics of less waste gas discharge and less wastewater discharge, and the system has characteristics of reasonable structure, easy manufacture, and low cost. The technical scheme is that: the sulfonated tail gas recycling method comprises the following steps that: dry air enters the lower part of a sulfur trioxide evaporator, and is subjected to counter current contact with liquid sulfur trioxide entering the upper part of an vaporizing mixer so as to evaporate into the sulfur trioxide gas; the sulfur trioxide gas is cooled, enters a sulfonator, is subjected to a contact reaction with an organic material in the sulfonator, and then is output; the sulfonated tail gas is separated from the liquid, wherein the separated liquid material is output and enters a neutralization system, the separated sulfonation tail gas enters an electrostatic demister to carry out a demisting treatment, the partial discharged sulfonated tail gas enters an alkali washing processing system, and the remaining sulfonated tail gas is conveyed to the lower part of the sulfur trioxide mixing evaporator to recycle. The pipeline system of the sulfonated tail gas recycling system is arranged according to the method.

The invention discloses a preparation method of a heparinoid, comprising: taking chondroitin sulfate as a raw material, and obtaining heparinoid after sulfonation reaction; the solvent used in the sulfonation reaction is formamide, and the sulfonating agent used is free trisodium Sulfur oxide, oleum or pyridinic sulfur trioxide. The preparation method of heparinoid according to the present invention has simple synthesis process, easy control of production operation, no special requirements for production equipment, stable molecular weight range of the product, control of physical and chemical indicators within the range of quality standards, high product yield, and is suitable for large-scale industrialization Production.

The invention discloses a method for detecting process and end point of sulfur trioxide sulfonation. The method comprises the following steps that: (1) a conductance-detecting electrode is inserted into reactant subjected to sulfonation; the conductance of the reactant is detected and displayed in real time; the conductance of the reactant decreases along with the process of sulfonation; and sulfur dioxide gas is adopted as a sulfonating agent in the sulfonation; and (2) when the conductance of the reactant is detected to decrease to zero, the sulfonation reaches the end for sure. The method has the advantages of tracking the process of the sulfonation in real time through the conductance change of sulfonation solution, accurately judging the end point of the sulfonation, reminding operators in real time, ensuring that reaction cannot exceed the end point, leaving out the trouble of chemical sampling detection and avoiding the phenomenon that the chemical sampling detection is not timely and accurate enough in results.

The invention discloses a separation method of a sulfonic acid combination. The separation method of the sulfonic acid combination comprises the following step of: separating the acidity dependence of a hydroxy compound as well as a sulfonic acid combination thereof rapidly by taking a mixture of a substrate of the hydroxy compound (containing phenolic hydroxyl group and alcoholic hydroxyl group) after chemical derivation or biological conversion as raw materials in virtue of chromatographic columns filled by composite materials, and meanwhile through utilizing eluents with different pH values. The separation method of the sulfonic acid combination provided by the invention has wide application in preparing the sulfonic acid combination, and is suitable for the purification and preparation of all sulfonic acid combinations which contain phenolic (alcohol) hydroxyl group, but not contain acidity groups.

The invention relates to a wiped-film sulfonator, belonging to the manufacturing technical field for a reaction device for producing an anion active agent through sulphonation or sulphation of gas SO3. The device comprises an orthostatic reaction cylinder body (8), a stirring shaft (10) with a scraping plate (9) arranged in the orthostatic reaction cylinder body (8), a lower tube plate (11) and an upper plate(5) with a sealed tube plate (4) which are arranged at the two ends of the orthostatic reaction cylinder body; an upper head (2) with a SO3 gas inlet (1) which is arranged at the upper part of the sealed tube plate, a lower head (12) with a reactant outlet (16) arranged at the lower part of the lower tube plate (11), a motor (18) with a reducer (17) which is connected with the stirring shaft (10) and fixed at the upper head (2) or the lower head (12) and 1-3 section cooling jackets (14) with a cooling water inlet (13) and a cooling water outlet (15) which is arranged at the periphery of the orthostatic reaction cylinder body (8), etc. The general structure is designed reasonably, the operation is flexible, the manufacture is easy and the investment is small.

An azasteroid mimic or an intermediate for the preparation of an azasteroid and azasteroid mimic is formed via an oxocycloalkenyl isoxazolium anhydrobase and its dimer. The dimer can be used to form mono- and dihydrazones, which can be an azasteroid mimic or an intermediate for the preparation of an azasteroid and azasteroid mimic. A method of preparation of the dimer and the azasteroid mimic or an intermediate for the preparation of an azasteroid and azasteroid mimic occurs with hydrazonation and, optionally, a subsequent dehydrazonation. The dimer can be converted by inserting a nitrogen atom into the six membered ring of to a C-17 position cyclohexenone moiety of the dimer to yield a reduced tetrazolo[1,5-a]azepin-8-yl group. A subsequent hydrozone formation at a benzylic ketone can be carried out to generate an azasteroid mimic with a (triazol-4-yl)imino substituent. Monohydrazones can be converted to their thione equivalents.

The present invention provides a catalyst composition comprising: (a) at least one catalyst, (b) at least one silicon additive, and (c) optionally a base. The present invention also provides the catalyst composition or catalyst according to the present invention for catalyzing 2 Use of a nucleophilic substitution reaction of a compound of the F group with a nucleophile. Catalyst or catalyst composition according to the present invention can fully activate the 2 F group compounds and nucleophiles, so that they can efficiently carry out nucleophilic substitution reactions. In addition, the nucleophilic substitution reaction using the catalyst composition or catalyst according to the present invention is easy to operate, has high yield, and is suitable for large-scale production.