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公开(公告)号：US4762862A
公开(公告)日：1988-08-09
申请号：US021647
申请日：1987-03-04
CPC分类号： C08F20/34 , C08F2/48 , Y10S522/903
摘要： A process for preparing particulate water-soluble cationic acrylic polymers having a high molecular weight, an excellent water solubility and a uniform particle size with a good productivity by adding a combined photoinitiator system of an azoguanyl compound and other usual photoinitiator to an aqueous monomer solution containing a cationic vinyl monomer, irradiating the aqueous monomer solution in the form of a thin layer on a moving support with ultraviolet rays in at least two stages, and finely dividing the produced aqueous polymer gel in a wet state by a roller cutter and then by a vertical cutter.
摘要翻译： 一种制备具有高分子量，优异的水溶性和均匀粒度的颗粒状水溶性阳离子丙烯酸类聚合物的方法，通过将偶氮芳基化合物和其它通常的光引发剂的组合光引发剂体系加入到含有 阳离子乙烯基单体，在至少两个阶段用紫外线照射移动的载体上的薄层形式的单体水溶液，并通过辊式切割机将所制备的湿态聚合物凝胶细分，然后通过 立式切割机
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公开(公告)号：US4996309A
公开(公告)日：1991-02-26
申请号：US416611
申请日：1989-10-03
IPC分类号： C07H13/06
CPC分类号： C07H13/06 , Y10S514/951
摘要： A process for preparing sucrose fatty acid esters by reacting sucrose and a fatty acid alkyl ester in an aqueous reaction system in the presence of a catalyst, adding water to the reaction mixture to dissolve it, adjusting the reaction mixture to a neutral ph region, adding a neutral salt to the solution to precipitate the sucrose fatty acid esters, separating and washing the precipitate with an acidic water, and subjecting the washing liquid to ultrafiltration. The precipitate washed with the acidic water is spray-dried in the form of an aqueous slurry to give a dry powder of the sucrose esters having low HLB, and the concentrate obtained by ultrafiltration is spray-dried to form a dry powder of the sucrose esters having high HLB, and the liquid obtained by separating the precipitate is contacted with a reverse osmosis membrane to recover sucrose. According to the invention, purifed sucrose fatty acid esters can be obtained without using an organic solvent, while sucrose can be recovered in high yield.
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公开(公告)号：US5144022A
公开(公告)日：1992-09-01
申请号：US516512
申请日：1990-04-30
CPC分类号： C07H13/06
摘要： The present invention provides a new method of purifying a high HLB sugar fatty acid ester without using any solvent and giving it as a powdery form, in which a crude sugar ester is neutralized in pH value, and added with water, a neutral salt and sugar to give a sediment; this sediment is washed with acidic water; the washed water containing the high HLB sugar fatty acid ester at higher concentration is added with a fatty acid to separate a deposition; and this deposition is neutralized and spray dried.
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公开(公告)号：US5017697A
公开(公告)日：1991-05-21
申请号：US373014
申请日：1989-06-28
CPC分类号： C07H13/06
摘要： A process for recovering, in a purified form, sucrose fatty acid esters having a high HLB included in a reaction mixture formed by a reaction of sucrose and a fatty acid alkyl ester in an organic solvent as reaction medium in the presence of a catalyst, which comprises adjusting the reaction mixture from which a part of the organic solvent may be previously removed and to which water is added to form an aqueous solution, to a neutral pH region, adding a neutral salt and sucrose to the solution to precipitate the sucrose fatty acid esters, separating and washing the precipitate with an acidic water, and subjecting the washing liquid to ultrafiltration. The concentrate obtained by ultrafiltration may be spray-dried to form a dry powder of the sucrose esters having high HLB, and the liquid obtained by separating the precipitate may be contacted with a reverse osmosis membrane to recover sucrose. According to the invention, purified sucrose fatty acid esters having high HLB can be obtained from the reaction mixture without using an organic solvent as purification solvent, while sucrose can be recovered in high yield.
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公开(公告)号：US5011922A
公开(公告)日：1991-04-30
申请号：US371892
申请日：1989-06-23
CPC分类号： C07H13/06
摘要： A process for purifying sucrose fatty acid esters included in a reaction mixture formed by a reaction of sucrose and a fatty acid alkyl ester in an organic solvent as reaction medium in the presence of a catalyst, which comprises adjusting the reaction mixture from which a part of the organic solvent as reaction medium may be previously removed and to which water is added to form an aqueous solution, to a neutral pH region, adding a neutral salt and sucrose to the solution to precipitate the sucrose fatty acid ester, filtering off the precipitate, and washing the precipitate with an acidic water. The washed precipitate in the form of slurry is spray-dried to form a dry powder, and the filtrate is contacted with a reverse osmosis membrane to recover sucrose. According to the invention, purified sucrose fatty acid esters can be obtained from the reaction mixture without using an organic solvent as purification solvent, while sucrose can be recovered in high yield.
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公开(公告)号：US5008387A
公开(公告)日：1991-04-16
申请号：US338012
申请日：1989-04-14
IPC分类号： C07H13/06
CPC分类号： C07H13/06
摘要： From a reaction mixture obtained by reaction of sucrose and a fatty acid alkyl ester in the presence of a catalyst, a purified sucrose fatty acid ester is prepared without using organic solvents for purification by adding water to the reaction mixture and subjecting the resulting aqueous solution to ultrafiltration, thereby removing the unreacted sucrose, the catalyst or a salt derived from the catalyst, and the volatile component used as the reaction medium together with water. A powder of the purified sucrose fatty acid ester is easily, economically and safely prepared by subjecting the aqueous solution remaining in the ultrafiltration to reverse osmosis and spray-drying the resulting concentrate.
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7.发明授权Process for recovering unreacted sucrose from reaction mixture in synthesis of sucrose fatty acid esters 失效在蔗糖脂肪酸酯的合成中从反应混合物中回收未反应的蔗糖的方法
公开(公告)号：US4995911A
公开(公告)日：1991-02-26
申请号：US365644
申请日：1989-06-13
摘要： A process for recovering unreacted sucrose from a reaction mixture of sucrose and a fatty acid alkyl ester in an organic solvent as reaction medium in the presence of a catalyst in the production of a sucrose fatty acid ester which comprises adjusting the reaction mixture from which a part of the organic solvent as reaction medium may be previously removed and to which water is added, to a neutral pH region, adding a neutral salt and sucrose to the reaction mixture to precipitate the sucrose fatty acid ester, filtering off the precipitate, and bringing the filtrate into contact with a reverse osmosis membrane to recover the unreacted sucrose. According to the invention, unreacted sucrose can be easily recovered, while the sucrose fatty acid ester not contaminated with the organic solvent as reaction medium can be obtained from the reaction mixture without using an organic solvent for purification.
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