- ZEOLITE CATALYZED PROCESS FOR THE AMINATION OF PROPYLENE OXIDE
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The present invention relates to a process for the conversion of propylene oxide to 1-amino-2- propanol and/or di(2-hydroxypropyl)amine comprising (i) providing a catalyst comprising a zeolitic material comprising YO2 and optionally comprising X2O3 in its framework structure, wherein Y is a tetravalent element and X is a trivalent element, wherein the zeolitic material has a framework-type structure selected from the group consisting of MFI and/or MEL, including MEL/MFI intergrowths; (ii) providing a mixture in the liquid phase comprising propylene oxide and ammonia; (iii) contacting the catalyst provided in (i) with the mixture in the liquid phase provided in (ii) for converting propylene oxide to 1-amino-2-propanol and/or di(2-hydroxypropyl)amine.
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Page/Page column 20-21
(2021/05/29)
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- Preparation method of isopropanolamine
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A preparation method of isopropanolamine comprising the following steps: 1, weighing isopropanolamine with the mole content of 80% or more and hydrochloric acid according to a ratio of 1:1, wherein the isopropanolamine is MIPA, DIPA and TIPA; 2, adding a calculated amount of hydrochloric acid to a flask with three necks, adding a calculated amount of commercial MIPA or TIPA in batches under stirring until the pH value is 2 at below 40DEG C, precipitating crystals, continuously stirring for cooling to 0DEG C, filtering to respectively obtain MIPA.HCl or TIPA.HCl, mixing the above obtained two mother liquors, and carrying out reduced pressure dewatering to obtain DIPA.HCl; or adding the calculated amount of hydrochloric acid to the flask with three necks, adding a calculated amount of commercial DIPA in batches under stirring until the pH value is 2 at below 40DEG C, cooling to 0DEG C, filtering to obtain a filter cake to be processed, and carrying out reduced pressure distillation under 100mmHg on the obtained filtrate until no precipitate precipitates to obtain DIPA.HCl; and 3, respectively carrying out a free reaction on the MIPA.HCl, DIPA.HCl and TIPA.HCl and an equivalent amount of a methanol solution of sodium methoxide, filtering to remove salt, and carrying out reduced pressure distillation on the above obtained methanol recovered solution to respectively obtain high-quality MIPA, DIPA and TIPA with the content of 97-99%. The obtained isopropanolamine can completely substitute imported products, meets domestic needs, and has substantial benefits.
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Paragraph 0019
(2017/01/23)
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- PROCESS OF MAKING BETA-HYDROXYAMINO COMPOUNDS
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The present application relates to molecules comprising one or more beta-hydroxyamine moieties, for example, aminosilicones and compositions such as consumer products comprising such molecules, as well as processes for making and using such molecules and such compositions. The aforementioned process is safer, more efficient and thus more economical. Thus, the aforementioned moleculers may be more widely used.
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Page/Page column 10
(2013/02/27)
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- Method of preparing bioerodible polymers having pH sensitivity in the acid range and resulting product
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Biodegradible polymers are provided which may contain a biologically active substance, e.g. a drug such as insulin, which is released over a period of time as the polymer erodes when in contact with a body fluid. The polymer contains an amine functionality whereby it erodes faster at low acid pH's than at higher acid pH's. As an example, the polymer may contain insulin and may contain or may have an encapsulating hydrogel containing glucose oxidase. As the blood sugar level of a diabetic person rises, e.g., afte a meal, glucose diffuses into the polymer or hydrogel and is converted to gluconic acid which lowers the pH, and accelerates erosion and the release of insulin.
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- Organic quaternary ammonium compounds and process for the preparation thereof
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Quaternary ammonium compounds having the general formula: STR1 in which, R1 is an alkyl or aryl group, unsubstituted or substituted by at least two ester groups; R2, R3 and R4 are alkyl, aryl, aryl alkyl or alkyl aryl groups substituted by ester groups comprising no more than 10 carbon atoms; m, r and n are whole numbers; A r- is an anion such that m×r=n. The compounds are obtained by treatment of a tert.alcohol-amine with an alkylating or arylating agent and an acylating agent. They may be used as activators of persalts in wash compositions.
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