公开(公告)号：WO1991018863A1

公开(公告)日：1991-12-12

申请号：PCT/FI1991000167

申请日：1991-05-28

Applicant: KEMIRA OY ,  SAARI, Kari ,  VUORI, Antti ,  MATTILA, Tapio

Inventor： KEMIRA OY

IPC: C07C51/44

CPC classification number: D21C3/20 ,  C07C51/44 ,  C13K1/04 ,  D21C11/10

Abstract: The invention relates to a process to a process for the recovery of lower aliphatic acids, such as formic acid, and sugars from the spent cooking liquor from a pulping process carried out with these same acids, lignin having been removed from the spent liquor. According to the invention, spent liquor is evaporated indirectly in a plurality of steps (1, 2, 3) by heating a preceding step (1, 2) with an acid-containing vapor (9, 13) obtained from the subsequent step (2, 3) and by diluting (4, 5) with the obtained condensate (11) the concentrated spent liquor (12) from the preceding step (2), water or a very dilute aqueous solution (14) being used in the last dilution step (3).

公开(公告)号：WO2004018404A1

公开(公告)日：2004-03-04

申请号：PCT/FI2003/000611

申请日：2003-08-19

Applicant: KEMIRA OYJ ,  PORKKA, Jani ,  SAARI, Kari ,  MATHIESEN, Flemming ,  LARSEN, Pia, Eigil

Inventor： PORKKA, Jani ,  SAARI, Kari ,  MATHIESEN, Flemming ,  LARSEN, Pia, Eigil

IPC: C07C51/41

CPC classification number: C07C51/412 ,  C07C53/06 ,  C07C53/122 ,  C07C53/10

Abstract: The invention relates to a process for manufacture of carboxylic acid salts in the form of alkali metal or alkaline-earth metal carboxylates of 1 to 3 carbon atoms. The continuous manufacturing process comprises: 1) passing carboxylate salt of a starting cation through one or several ion exchange beds containing solid cation exchanger charged with an alkali metal or alkaline-earth metal cation,2) collecting a product solution containing alkali metal or alkaline-earth metal carboxylate eluted from the one or several ion exchange beds in step 1,3) simultaneously with step 1, regenerating one or several ion exchange beds containing solid cation exchanger charged with the starting cation by passing a regenerating solution containing a salt formed by an anion and the alkali metal or alkaline-earth metal cation through the one or several ion exchange beds,4) collecting an effluent solution containing the starting cation and the anion eluted from the one or several ion exchange beds in step 3, and 5) shifting the inlet and outlet points of the solutions in the same direction to other ion exchange beds._________________________________________________________

Abstract translation: 本发明涉及一种制备1至3个碳原子的碱金属或碱土金属羧酸盐形式的羧酸盐的方法。 连续制造方法包括：1）将起始阳离子的羧酸盐通过含有碱金属或碱土金属阳离子的固体阳离子交换剂的一个或多个离子交换床，2）收集含碱金属或碱土金属阳离子的产物溶液， 在步骤1,3）同时从步骤1,3）中的一个或多个离子交换床洗脱的金属的金属羧酸盐与步骤1同时进行，再生含有起始阳离子的固体阳离子交换剂的一个或几个离子交换床，通过使含有由 阴离子和通过一个或多个离子交换床的碱金属或碱土金属阳离子，4）收集在步骤3中从一个或多个离子交换床洗脱的起始阳离子和阴离子的流出液，5） 溶液的入口点和出口点在与其他离子交换床相同的方向上。

公开(公告)号：WO1991018864A1

公开(公告)日：1991-12-12

申请号：PCT/FI1991000168

申请日：1991-05-28

Applicant: KEMIRA OY ,  MATTILA, Tapio ,  SAARI, Kari ,  VUORI, Antti

Inventor： KEMIRA OY

IPC: C07C51/44

CPC classification number: C07C51/445 ,  D21C3/20

Abstract: The invention relates to a process for the recovery of a lower aliphatic acid, such as formic acid, from chemical pulp. A pulp which contains formic acid is first vacuum evaporated at 70-100 °C, and ultimately the vacuum-evaporated pulp is washed with hot water or stripped with steam at 100-140 °C.

公开(公告)号：WO2007135229A1

公开(公告)日：2007-11-29

申请号：PCT/FI2007/000142

申请日：2007-05-24

Applicant: KEMIRA OYJ ,  SAARI, Kari ,  TIMONEN, Riikka ,  KERÄLÄ, Jori ,  PEKONEN, Pentti ,  HUKKANEN, Pentti ,  KOSKINEN, Heli ,  VUORI, Antti

Inventor： SAARI, Kari ,  TIMONEN, Riikka ,  KERÄLÄ, Jori ,  PEKONEN, Pentti ,  HUKKANEN, Pentti ,  KOSKINEN, Heli ,  VUORI, Antti

IPC: C01B33/14 ,  C04B14/04 ,  C04B28/24

CPC classification number: C04B12/04 ,  C01B33/14

Abstract: A process for producing an acid silicate solution from an amorphous silica raw-material. The process comprising dissolving the silica raw-material in an organic acid, and is carried out in a where the silica raw-material is suspended in a liquid which contains the acid to produce a silica-containing suspension having a dry solids content of at least 10 %, calculated from the weight of the liquid, and a second step where silica is reacted with the acid in the suspension to produce a silicate solution having a silicon content of at least 0.1 % by weight. The process can be carried out in a continuous fashion and by carrying out the suspension step at high dry matter content, the volume of water that needs to be evaporated during the use of the solution can be greatly reduced.

Abstract translation: 一种由无定形二氧化硅原料生产酸式硅酸盐溶液的方法。 该方法包括将二氧化硅原料溶解在有机酸中，并将二氧化硅原料悬浮在含有酸的液体中进行，以产生干固体含量至少为二氧化硅的悬浮液 10％，由液体的重量计算，第二步是使二氧化硅与悬浮液中的酸反应生成硅含量至少为0.1重量％的硅酸盐溶液。 该方法可以以连续的方式进行，并且通过以高干物质含量进行悬浮步骤，可以大大降低在使用溶液期间需要蒸发的水的体积。