30results about How to "High sulfonation rate" patented technology

The invention discloses a resource treatment method of a wood pulp black liquor obtained by a sulfate method and belongs to the fields of pulping and papermaking, environmental protection and comprehensive utilization of resources. The resource treatment method comprises: carrying out centrifugation on a digestion black liquor obtained by the sulfate method wood pulp papermaking to separate waterinsoluble matters, filtering the digestion black liquor through a ceramic ultrafiltration membrane, recycling the filtrate, adjusting pH of the concentrated black liquor to precipitate lignin at pH less than 7 and carrying out separation purification on the lignin, washing purification, sulfurization reaction, evaporation concentration, simultaneous sulfonation modification, and spray drying to obtain sodium lignosulfonate. Sodium sulfide in the acid precipitation waste liquid is recovered and treated through an alkali recovery process and is used for digestion pulping. The sodium lignosulfonate product obtained by the method has high purity and good quality, can be used as a concrete water reducing agent and has performance indexes meeting the standard requirements of the concrete high-efficiency water reducing agent.

The invention relates to synthesis of polystyrolsulfon acid and its application. Recovered polystyrene is used as a raw material and is purified by ethyl acetate dissolution; and fuming sulphuric acid is used for sulfonation so as to prepare polystyrolsulfon acid which is used as a catalyst to be applied in catalyzing an esterification reaction between polyol and carboxylic acid. Research results show that, in comparison with benzenesulfonic acid, the catalyst has advantages of low production cost, high esterification rate, convenient recovery, simple product aftertreatment technology, high viscosity index of an esterification product and the like.

The invention relates to controlled-release fertilizer as well as a preparation method and application thereof. The controlled-release fertilizer is prepared by taking straw powder as a raw material,carrying out sulfonation treatment under the existence of sulfite, a buffer agent, anthraquinone and copper salt, then carrying out alkalization treatment by sodium hydroxide and finally carrying outchloroacetic acid treatment. The invention also provides the preparation method and the application of the controlled-release fertilizer. In the controlled-release fertilizer provided by the invention, the molecular weight of lignin is small, the sulfonating rate is high, and the lignin and cellulose in plant straw are fully utilized; the controlled-release fertilizer can be applied by adding water or be applied as base fertilizer or topdressed fertilizer, a slow release effect is good, and release of nutrients can be effectively controlled.

The invention provides a low-fluorescence sulfonating asphalt for a blocking agent for a drilling liquid. The high-temperature and high-pressure filter loss is 3.8 to 5.6ml/30min, the content of water-soluble matter is 79.4 to 87.6%, and the content of sodium sulfonate is 15.6 to 18.8%. The low-fluorescence sulfonating asphalt for the blocking agent for the drilling liquid is prepared by a methodwith the following steps of dispersing silica gel powder into petroleum ether, slowly adding chlorosulfonic acid, and stirring, so as to obtain a sulfonating agent; mixing the low-fluorescence asphaltand a solvent to obtain a reaction raw material, and sulfonating the reaction raw material by a sulfonating agent for 3 to 5h; neutralizing a product after sulfonating reaction and a sodium hydroxidewater solution to react until the pH (potential of hydrogen) value is 8 to 9; distilling and drying the product after neutralizing reaction, so as to obtain the low-fluorescence sulfonating asphalt for the blocking agent for the drilling liquid, wherein the solvent contains C6-C12 sodium alkyl benzene sulfonate and petroleum ether. The low-fluorescence sulfonating asphalt for the blocking agent for the drilling liquid has the advantages that the content of water-soluble matter is high, the sulfonating rate is high, and the high-temperature and high-pressure filter effect is good; the preparation method adopts mild reaction conditions, and is suitable for large-scale industrialized production.

The invention relates to a lignin fertilizer and a preparation method and application. The lignin fertilizer takes straw as a raw material, and straw together with sulfite, a buffering agent, anthraquinone and copper salt undergoes a one-step reaction to prepare a liquid fertilizer. The content of lignin is 1.5-3.5% according to a mass ratio, and the weight average molecular weight of lignin is 2000-5000. The invention further provides a preparation method and application of the lignin fertilizer. Lignin in plant straw is fully applied at a high value. The lignin is small in molecular weight,high in sulfonation rate, good in sulfonation and beneficial for crop absorption. The preparation step is simplified, and the lignin fertilizer is obtained through a one-step charging reaction.

The invention discloses a sulfonated leather greasing agent containing fatty acid low-carbon ester. The sulfonated leather greasing agent containing fatty acid low-carbon ester disclosed by the invention is prepared by comprising the following steps: sulfonating by taking saturated fatty acid low-carbon ester as the raw material so as to obtain sulfonated fatty acid low-carbon ester, adding grease or modified grease, uniformly mixing, putting in an aging tank to age, decolourizing, and finally, adjusting pH of the decolourized sulfonated fatty acid low-carbon ester to be 4-8 so as to obtain the leather greasing agent. The invention further discloses a preparation method of the leather greasing agent. Because of being a liquid product, the leather greasing agent disclosed by the invention is convenient for down-stream customers to use; furthermore, the leather greasing agent is steady in property and has good fillibility; and thus, leather is plump and soft in hand feeling and smooth in surface.

The invention relates to a method for preparing a polyether polycarboxylic acid type high-efficiency water reducing agent from polyethylbenzene tower bottom high-boiling residues. The polyether polycarboxylic acid type high-efficiency water reducing agent is prepared by free radical polymerization of arone olefin, a double-bond-containing macromonomer and a micromolecular monomer, and the arone olefin is prepared by catalytic acylation of poly-ethylbenzene sulfonic acid and unsaturated acylate by using a bifunctional molecular sieve encapsulated catalyst. The bifunctional molecular sieve encapsulated catalyst is prepared by one-step hydrothermal reaction of sodium metaaluminate, sodium hydroxide, modified silicon dioxide, N,N,N-trimethyl-1-amantadine, carbon nanotubes and (2,2'-bipyridine) nickel diiodide. The polyethylbenzene sulfonic acid is prepared by sulfonating the high-boiling residues at the bottom of a polyethylbenzene tower. According to the method, the polyethylbenzene tower bottom high-boiling residues serve as raw materials, polyether polycarboxylic acid type high-efficiency water reducing agent molecules are prepared through the steps of sulfonation, acylation, free radical polymerization and the like, and the polyether polycarboxylic acid type high-efficiency water reducing agent is practically applied to the building field and has important significance in resourceful treatment of the ethylbenzene tower bottom high-boiling residues.

Method of using SO*-air mixture to produce alkylphenol sulfonic acid and salts thereof via film sulfonator sulfonated alkylphenol, belongs to sulphonate preparing technology field. The invention uses alkylphenol as raw material, and uses SO[3]-air mixture to sulfonate the raw material via film sulfonator to obtain alkylphenol sulfonic acid, and uses alkaline solution such as NaOH to neutralize the alkylphenol sulfonic acid to obtain alkylphenol sulphonate, the alkylphenol used is a alkylphenol containing one or two C[1]-C[20] straight-chain or branched chain alkyl; the alkylphenol sulfonic acid and salt thereof prepared by the method has high sulphonation rate, low free oil content, low inorganic salt content and producing no spend acid, which is no corrosion to equipments and helpful for environmental protection.

The invention relates to a method for preparing sulphated castor oil. The method comprises the following specific steps of: sulphating: carrying out sulphation reaction by adding a catalyst into the castor oil and dropping fuming sulphuric acid, wherein the dropping temperature is 20-28 DEG C; and the dropping time is 1-2 h; continuously reacting for 3-5 h, controlling the temperature at 28-38 DEG C, and obtaining a castor oil sulphate solution; salt washing: washing the castor oil sulphate solution by using saturated salt water to obtain salt washed castor oil sulphate; and neutralizing: neutralizing the salt washed castor oil sulphate by using ammonia water, and controlling the pH value at 7-8 to obtain the sulphated castor oil. According to the method disclosed by the invention, the catalyst is used in the castor oil sulphation process, therefore, the castor oil sulphation speed is increased; the sulphonated rate is increased; the catalyst can be recycled in the salt washing process; the sulphation reaction temperature is 20-38 DEG C; the by-products in the reaction process are reduced; the product impurities are reduced; the product performance is better; the neutralization process is easy to master by using ammonia water; and the excess neutralization is difficult.

The invention a method for green synthesis of tertiary oil recovery petroleum sulfonates in a high gravity reactor and belongs to the field of fine chemicals. The method comprises the steps: using distillate oil as a raw , sulfonating and aging the distillate oil through the high gravity-screw combination reactor to obtain an obtained petroleum sulfonate surfactant, and then neutralizing the obtained petroleum sulfonate surfactant. The method is mainly characterized in that the wide distillate oil is used as the raw material, and gas phase SO3 is used as a sulfonation agent; the petroleum sulfonates obtained after neutralizing with ammonium hydroxide is free of solvent removal process, so that the process is shortened; sulfonation efficiency is high, the content of active matters is high and the interfacial tension is low; and in the method, the production equipment and process which can realize processing strengthening, safety, high efficiency and cleaning are used. The method is suitable for scale and continuous production of the tertiary oil recovery petroleum sulfonates.

The invention discloses a method for producing sodium lignosulfonate by using pulping black liquor of a sulphate method, which belongs to the fields of pulping and papermaking, environmental protection and comprehensive utilization of resources. The process adopts the pulping black liquor of a sulphate method as a main raw material, and produces sodium lignosulfonate by filtration, evaporation concentration, sulfonation modification, spray drying, etc. The black liquor is turned into wealth from wastes, and resources are made full use of, to produce high value-added fine chemical products, andreduce waste of resources. The sodium lignosulfonate product produced by the method is used for a concrete water reducing agent, and various performance indexes meet the standard requirements of a concrete high-efficiency water reducing agent.