31 results about "Amberlyst-15" patented technology

The invention relates to a method used for catalyzed synthesis of tert-butyl acrylate. The method comprises following steps successively:1) acrylic acid, a catalyst combination, a polymerization inhibitor A, and a polymerization inhibitor B are delivered into a sealed reaction kettle, and liquefied isobutylene is added dropwise for esterification, wherein the catalyst combination is composed of nanosolid superacid SO<4><2-> / SnO<2>, Amberlyst-15, D001 resin, and NKC-9 resin; 2) after adding, heat preservation is carried out; 3) after heat preservation, the sealed reaction kettle is subjected to pressure relief, an obtained mixture is subjected to filtration, and an obtain liquid ingredient is pumped into a rectifying tower; and 4) by-products tert-butyl alcohol, diisobutylene, and the target product tert-butyl acrylate are obtained via separation successively. Yield of tert-butyl acrylate is higher than 98%; reuse ratio of the catalyst is high; the method is simple; and no pollution is caused.

A method for preparing dibutoxymethane using dimethoxymethane and n-butanol as raw materials, relates to a method for preparing dibutoxymethane, the method includes the following process: using dimethoxymethane and n-butanol as raw materials , using liquid acid and supported liquid acid as catalysts, reacting at a reaction temperature of 0-160°C and a reaction pressure of 0.1-10.0 MPa to generate dibutoxymethane with high selectivity; the resin catalyst is KAD302 containing sulfonic acid functional groups, One or more resin catalysts such as KC107, NKC‑9, DA‑330, D009B, Amberlyst‑15, D072H; the reaction temperature is 0-160°C, and the reaction pressure is 0.1-10.0 MPa. The product of the method of the invention is relatively single, the selectivity is high, the required raw materials are cheap and easy to obtain, the whole process is simple to operate, no chemical substances polluting the environment are produced, and it belongs to an environmentally friendly process path.

The invention discloses a preparation method of a quinoxaline derivative. The method is characterized by condensing an o-diamino compound with an o-dicarbonyl compound in a polar solvent in the presence of catalyst Amberlyst-15 or NKC-9 dry hydrogen catalyzed resin Styrene-DVB to prepare the quinoxaline derivative. The preparation method takes ordinary tap water instead of a toxic organic solventas the solvent for a condensation reaction to obtain the quinoxaline derivative with high yield and high content. The catalyst can be recovered and can be reused for at least three times in a condition of no loss of the catalytic activity, thus effectively reducing the production cost. The preparation method of the quinoxaline derivative has the advantages of simple process operation, no environment pollution, and is fit for large-scale industrialized production.

A method for preparing ethoxymethoxymethane, relates to a method for preparing methane, the method uses dimethoxymethane and ethanol as raw materials, and uses resin as a catalyst under temperature and pressure to prepare ethoxymethane Resin catalyst is one or more resin catalysts of KAD302, KC107, NKC-9, DA-330, D009B, Amberlyst-15, D072H; Resin catalyst is based on the resin catalyst containing sulfonic acid group; The reaction temperature is 0-160°C, the reaction pressure is 0.1-10.0 MPa; the filling gas is an inert gas, which is one of argon, helium, carbon dioxide, or nitrogen or a mixture thereof; the reactor is a fixed bed or tank type Reactor; the molar ratio of raw materials dimethoxymethane and ethanol is 1:2 to 5:1. The synthesis process of the invention has simple products, fewer side reactions, and high selectivity of the required product ethoxymethoxymethane; meanwhile, the method of the invention basically does not pollute the environment.

The invention discloses an oleophobic property reinforcing method of catalyst surface, which comprises the following steps: coating certain acid catalyst with oleophobic property such as Teflonx-{[(HSiW) / (SiO2)]y)(1-x), Teflonx / Amberlyst-15 and Teflonx / Amberlyst-35; detecting the finishing and finished touch corner of solid acid surface and soybean oil drip through droplet shape analyzer.

The invention discloses a method for preparing D-serine by kinetic resolution. The method takes DL-serine as raw material and is implemented by esterifying DL-serine with methanol under catalysis of Amberlyst-15 ion exchange resin to obtain DL-serinemethylester, carrying out dynamic kinetic resolution on DL-serinemethylester and resolving agent L-DBTA under action of racemization catalyst to obtain dibasic DL-serinemethylester.L-DBTA, dissociating with hydrochloric acid, and hydrolyzing to obtain D-serine, the target product of the invention. Compared with the prior art, by using the racemization catalyst in the invention, the dynamic continuous conversion of dibasic L-serinemethylester.L-DBTA into dibasic DL-serinemethylester.L-DBTA can be realized with the theoretic conversion rate being approximate to 100%, thus greatly enhancing yield of resolution, reducing operation cost, stabilizing product quality and being suitable for industrialized production.

A method for synthesizing diethoxymethane with dimethoxymethane and ethanol relates to a method for preparing methane, using dimethoxymethane and ethanol as raw materials, using liquid acid and loaded liquid acid as catalysts, and using dimethoxymethane and ethanol as catalysts. React under the conditions of reaction temperature 0-160°C and reaction pressure 0.1-10.0 MPa to form diethoxymethane with high selectivity; resin catalysts are KAD302, KC107, NKC‑9, DA‑330, D009B, Amberlyst containing sulfonic acid functional groups ‑15, D072H one or more resin catalysts; the reaction temperature is 0-160°C, the reaction pressure is 0.1-10.0 MPa; the filling gas is an inert gas, which is one of argon, helium, carbon dioxide, or N2 mixed gas species or mixture. The product of the invention is relatively single, has high selectivity, and has good application prospects. Moreover, the raw materials required by the method are cheap and easy to obtain, and the whole process is easy to operate. At the same time, the method does not produce any chemical substances that pollute the environment, and belongs to an environmentally friendly process path.

This invention relates to the development of processes for the preparation of functionalized castor oil derivatives namely ring-opened glyceryl ricinoleates, epoxy alkyl ricinoleates and ring-opened alkyl ricinoleates with tailorable properties from epoxidized castor oil as raw material using heterogeneous acid and base catalysts. More particularly, the invention employs two reaction chemistries namely ring-opening and transesterification using Amberlyst 15 as solid acid catalyst for the former and oxides derived from CaAl layered double hydroxide (CaAl-LDH) as solid base catalyst for the latter and combinations thereof. Furthermore, both the catalysts are reusable and the products are easily separable after the reaction by simple physical processes.

The invention discloses a synthesis method of high-4,4'-isomer-content bisphenol F, which comprises the following step: by using phenol and formaldehyde as raw materials, synthesizing bisphenol F by a two-step process by using Amberlyst-36 and Amberlyst-15 cation exchange resins as catalysts, wherein the mass percent of the 4,4'-isomer bisphenol F is up to 60% or above, and the mass yield of the bisphenol F is up to 90% or above. The catalysts are commercial cation exchange resins, can be easily purchased, separated and recovered, and are recyclable. The method has the advantages of low reaction temperature, short reaction time and no corrosiveness to equipment, is suitable for continuous production of tubular reactors, and has favorable industrial application prospects.

A method of utilizing an ester solvent to process a polystyrene sulfonic acid resin catalyst relates to a method for processing a resin catalyst, the method comprising the following steps: adding a polystyrene sulfonic acid resin catalyst to a container containing an ester solvent, Introduce a gas with a pressure of 0.1-20.0 MPa, control the treatment temperature at 35-150°C, and the treatment time at 0.5-20.0 h. The polar organic ester solvent is also used as a water-carrying agent, a pore-enlarging agent and a structural modifier of the sulfonic acid resin. It works; the catalyst is a resin catalyst containing sulfonic acid functional groups, which is one or more mixtures of D-009B, DA-330, NKC-9, D-006, Amberlyst-15, and D-072. The method of the present invention adopts polar organic ester solvent heat treatment polystyrene sulfonic acid resin catalyst, and after the treatment, the sulfonic acid resin catalyst is used for methylal carbonylation reaction, and compared with the sulfonic acid resin catalyst that has not been treated with ester, it shows extremely Excellent reactivity, stability and selectivity to methyl methoxyacetate.

The invention discloses an oxapium iodide preparation method. The method comprises the steps of S1, preparing 2-phenyl-2-hexamethylene-4-methanol-1,3-dioxolane, S2, preparing 2-phenyl-2-hexamethylene-4-piperidinemethyl-1, 3-dioxolane, and S3, preparing the oxapium iodide. The step S1 comprises the steps of mixing uniformly cyclohexyl phenyl ketone, glycerol, Amberlyst-15 exchange resin and allochroic silicagel, heating, maintaining the temperature, stirring, filtering, taking the filtered solution, adding saturated sodium hydrogen carbonate aqueous solution for washing, keeping static, taking organic layer, drying, releasing pressure, distilling to acquire material A, purifying material A, drying to acquire 2-phenyl-2-hexamethylene-4-methanol-1, 3-dioxolane. The method has the advantages of being mild in reaction condition, simple in operation, suitable for industrialized production, low in material toxicity, easy and cheap for material access, low in cost and good in comprehensive yield rate.