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US06881356B2 Method for producing tanning agents containing sulphone 失效
标题翻译：生产鞣剂的方法
公开(公告)号：US06881356B2
公开(公告)日：2005-04-19
申请号：US10486208
申请日：2002-08-16
申请人： Gunther Pabst , Gerhard Wolf , Jürgen Kast , Jürgen Werner
发明人： Gunther Pabst , Gerhard Wolf , Jürgen Kast , Jürgen Werner
IPC分类号： C08G8/28 , C08L61/14 , C14C3/20 , C14G1/00 , C08G14/02
CPC分类号： C08G8/28 , C08L61/14 , C14C3/20
摘要： A process for preparing a solution of sulfone-containing tanning materials comprises a) preparing a component A by a1) reacting phenol with concentrated sulfuric acid, with oleum of an SO3 content of from 20 to 65% by weight or with a mixture of sulfuric acid and oleum of an SO3 content of from 20 to 65% by weight, the molar ratio of total sulfuric acid, reckoned as SO3, to phenol being in the range from 0.7:1 to 1.5:1, at from 100 to 180° C. to form a mixture containing phenolsulfonic acid, dihydroxydiphenyl sulfone and sulfuric acid, or mixing the individual components to prepare a corresponding mixture, a2) then condensing said mixture with from 0.25 to 4 mol of urea and with from 0.5 to 4 mol of an aliphatic aldehyde of 1 to 6 carbon atoms per mole of phenol units present at from 40 to 90° C., a3) optionally adding a base to set a pH of from 4 to 5, b) preparing a component B by b1) reacting dihydroxydiphenyl sulfone with from 0.5 to 5 mol of an aliphatic aldehyde of from 1 to 6 carbon atoms and with from 0.4 to 2 mol of sodium sulfite per mole of dihydroxydiphenyl sulfone at from 90 to 180° C., b2) optionally adding an acid to set a pH of from 3.5 to 5.5, c) mixing from 10 to 90% by weight of component A with from 90 to 10% by weight of component B, the sum total of A and B being 100% by weight, and, unless already effected in steps a3) and b2), setting the pH of the mixture to a value in the range from 3.5 to 5.5.
摘要翻译：制备含砜鞣制材料溶液的方法包括：a）通过a1）使苯酚与浓硫酸反应制备组分A，其中SO 3 SO 3含量的发烟硫酸含量为20-65％重量或硫酸和发烟硫酸的混合物，其SO 3 3含量为20至65重量％，总硫酸的摩尔比计为SO 3 N 3 ，苯酚在0.7:1至1.5:1的范围内，在100-180℃，以形成含有苯酚磺酸，二羟基二苯基砜和硫酸的混合物，或混合各组分以制备相应的混合物，a2 ），然后将所述混合物与0.25至4摩尔的尿素和0.5至4摩尔具有1至6个碳原子的脂族醛/摩尔在40至90℃下存在的苯酚单元缩合，a3）任选加入碱，以使pH为4至5，b）通过使二羟基二苯基砜与0.5至5mol的a 含有1至6个碳原子的脂族醛和0.4至2摩尔亚硫酸钠/摩尔二羟基二苯基砜在90至180℃，b2）任选加入酸以使pH为3.5至5.5，c ）混合10至90重量％的组分A和90至10重量％的组分B，A和B的总和为100重量％，除非在步骤a3）和b2）中已经实现，将混合物的pH设定在3.5至5.5的范围内。

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