Processes for the production of xylitol
    3.
    发明申请
    Processes for the production of xylitol 有权
    生产木糖醇的方法

    公开(公告)号:US20050272961A1

    公开(公告)日:2005-12-08

    申请号:US11093091

    申请日:2005-03-25

    CPC分类号: C25B3/02 C07C29/141 C07C31/18

    摘要: Methods of producing xylitol comprising the oxidative decarboxylation of a reactant substrate are provided herein. The oxidative decarboxylation is performed in one of two ways. In the first, the oxidative decarboxylation is performed by an electrochemical process, preferably an anodic odixative decarboxylation of a reactant substrate. In the second, the oxidative decarboxylation of the reactant substrate is carried out by a series of oxidation-reduction chemical reactions.

    摘要翻译: 本文提供了包含反应物底物的氧化脱羧作用的木糖醇的生产方法。 氧化脱羧以两种方式之一进行。 首先,通过电化学方法进行氧化脱羧,优选反应物底物的阳极氧化脱羧。 第二,通过一系列氧化还原化学反应进行反应物底物的氧化脱羧作用。

    Process for the preparation of pentaerythritol
    5.
    发明授权
    Process for the preparation of pentaerythritol 失效
    季戊四醇的制备方法

    公开(公告)号:US5741956A

    公开(公告)日:1998-04-21

    申请号:US756340

    申请日:1996-11-26

    申请人: Lluis Eek

    发明人: Lluis Eek

    CPC分类号: C07C29/38

    摘要: A process for the preparation of pentaerythritol, comprising reacting formaldehyde, acetaldehyde and sodium hydroxide and acidification with formic acid. These steps take place in a reactor with supplies of formaldehyde, sodium hydroxide, acetaldehyde and formic acid and at the end the solution formed is evacuated to a buffer tank of larger capacity than the reactor. In the reactor new reactions and acidifications are successively reinitiated by new supplies. In the first place a formaldehyde solution is added, followed by simultaneous but separate additions of sodium hydroxide solution and acetaldehyde, forming a reaction mixture in such a way that the flowrates of the solutions vary with the time and that the temperature at which the reactions are conducted also varies with the time. The outflow from the buffer tank is constant and continuous.

    摘要翻译: 一种制备季戊四醇的方法,包括使甲醛,乙醛和氢氧化钠反应并与甲酸酸化。 这些步骤在具有甲醛,氢氧化钠,乙醛和甲酸供应的反应器中进行,最后将形成的溶液抽空到比反应器容量更大的缓冲罐中。 在反应堆中,新的反应和酸化被新的用品相继重新开始。 首先加入甲醛溶液,然后同时但分开加入氢氧化钠溶液和乙醛,形成反应混合物,使溶液的流速随时间而变化,反应温度为 进行也随时间而变化。 缓冲罐的流出是恒定的和连续的。

    Low-caloric sweetening composition of microcrystalline appearance
    6.
    发明授权
    Low-caloric sweetening composition of microcrystalline appearance 失效
    低温烧结组合物的微晶外观

    公开(公告)号:US5080916A

    公开(公告)日:1992-01-14

    申请号:US504084

    申请日:1990-03-30

    申请人: Tsutomu Kondou

    发明人: Tsutomu Kondou

    CPC分类号: A23F5/465 A23L27/34

    摘要: A low-caloric sweetening composition of micro-crystalline appearance comprises microcrystalline mesoerythritol particles whose surface is coated with a sweetening component containing at least one nonsugar sweetener, an amount of which is adjusted to within ranges from 9.4 to 2.6, preferably 6.5 to 2.6, with respect to a product of a weight part of the nonsugar sweetener per weight part of the mesoerythritol as one and a relative sweetness of the nonsugar sweetener to a sucrose. When plural nonsugar sweeteners are contained, the product is calculated as a sum of the products obtained in terms of each nonsugar sweetener.

    Method for hydrogenating aqueous solutions of carbohydrates
    8.
    发明授权
    Method for hydrogenating aqueous solutions of carbohydrates 失效
    氢化碳水化合物水溶液的方法

    公开(公告)号:US4487980A

    公开(公告)日:1984-12-11

    申请号:US489925

    申请日:1983-04-29

    申请人: Blaise J. Arena

    发明人: Blaise J. Arena

    摘要: Zerovalent Group VIII metals dispersed on titanium dioxide reduced and calcined at a temperature less than about 300.degree. C. are hydrothermally stable hydrogenation catalysts which may be used advantageously in the reduction of aqueous solutions of carbohydrates. The use of ruthenium on titanium dioxide in the hydrogenation of glucose affords sorbitol in excellent yields with quite high selectivity.

    摘要翻译: 分散在二氧化钛上的零价VIII族金属在低于约300℃的温度下还原并煅烧,是水热稳定的氢化催化剂,可有利地用于还原碳水化合物的水溶液。 在二氧化钛在葡萄糖氢化中使用钌以极高的选择性提供山梨糖醇的良好产率。

    Treatment of waste stream from pentaerythritol production
    9.
    发明授权
    Treatment of waste stream from pentaerythritol production 失效
    从季戊四醇生产废弃物处理

    公开(公告)号:US4328366A

    公开(公告)日:1982-05-04

    申请号:US124650

    申请日:1980-02-25

    CPC分类号: C07C53/06 C07C29/38

    摘要: This invention provides a process for recovery of sodium formate from an aqueous waste stream which is a byproduct mother liquor derived from a reaction system in which pentaerythritol is produced by the reaction of formaldehyde with acetaldehyde in the presence of sodium hydroxide catalyst.As one of its important features, the invention process involves contacting the mother liquor with a monoalkylamine solvent which is highly selective for extraction of organic materials to the exclusion of sodium formate.

    摘要翻译: 本发明提供了一种从废水流中回收甲酸钠的方法,该废水是从氢氧化钠催化剂存在下通过甲醛与乙醛的反应生成季戊四醇的副产物母液。 作为其重要特征之一,本发明方法包括使母液与单烷基胺溶剂接触,所述单烷基胺溶剂对于萃取有机材料至排除甲酸钠是高选择性的。

    Hydroxylation of unsaturated diols to prepare novel tetraols
    10.
    发明授权
    Hydroxylation of unsaturated diols to prepare novel tetraols 失效
    不饱和二醇的羟基化以制备新型四醇

    公开(公告)号:US3991126A

    公开(公告)日:1976-11-09

    申请号:US612417

    申请日:1975-09-11

    申请人: Robert Bacskai

    发明人: Robert Bacskai

    IPC分类号: C07C31/24 C07C29/00 C07C31/18

    CPC分类号: C07C31/24

    摘要: Tetraols of the formula ##EQU1## wherein R is hydrogen or hydroxy; R' is hydrogen or hydroxy and differs from R; n is an integer from 1 to about 6; and m is an integer from 0 to 6, are prepared by epoxidation of select unsaturated diols to form 1,2- epoxides, followed by hydroxylation of the epoxides.

    摘要翻译: 式R 2 CH 2 | CH 2 - (CH 2)n -C-CH-(CH 2)m -CH 2 CH 2 OHOHR'OH的四醇其中R是氢或羟基; R'是氢或羟基,并且不同于R; n是1至约6的整数; m为0〜6的整数,通过选择性不饱和二醇的环氧化形成1,2-环氧化物,然后进行环氧化物的羟基化而制备。