公开(公告)号：WO1993022492A1

公开(公告)日：1993-11-11

申请号：PCT/CH1993000108

申请日：1993-04-30

Applicant: GRANIT S.A. ,  GORDON, Otto, W. ,  PLATTNER, Eric ,  DOPPENBERG, Frank

Inventor： GRANIT S.A.

IPC: D21C11/00

CPC classification number: D21C3/222 ,  D21C3/003 ,  D21C3/02 ,  D21C11/0057 ,  D21C11/14

Abstract: For the production of cellulose from wood and annual plants, a boiling process is proposed in which the boiling liquor contains free soda lye and sodium salts of the alkylbenzole sulphonic acids or aromatic and aliphatic carboxylic acids. Delignification is reinforced on the addition of anthraquinone or its derivatives to the boiling liquor. There is no need to restrict the quantities of the anthraquinone additive owing to its price since anthraquinone resists wet oxidation and can be recycled in the boiling process. The solubility and hence the effect of the anthraquinone is enhanced by the use of sulphonic acid salts. In order to recover the processing chemicals contained in the black liquor it is proposed that the dissolved lignin be precipitated with mineral or carboxylic acid, the hemi-celluloses be separated by ultra-filtration and the resins by extraction, where appropriate, and the remaining organic components except for the sulphonic and carboxylic acids salts be burned in the aqueous phase with air and/or oxygen. The chemical solution freed from the wood decomposition products may be returned to the liquor after caustification of the carbonates and, after the partial crystallisation of the aliphatic carboxylic acid salts, made available in the circuit for cellulose production. The sodium acetate isolated by crystallisation can be broken down into acetic acid and sodium hydroxide by diaphragm electrolysis. The soda lye is returned to the boiling process and the acetic acid treated separately.

公开(公告)号：WO1993022490A1

公开(公告)日：1993-11-11

申请号：PCT/CH1993000109

申请日：1993-04-30

Applicant: GRANIT S.A. ,  GORDON, Otto, W. ,  PLATTNER, Eric ,  DOPPENBERG, Frank

Inventor： GRANIT S.A.

IPC: D21C03/20

CPC classification number: D21C3/20 ,  D21C11/0057

Abstract: In order to recover inorganic chemicals from waste liquors in cellulose manufacturing processes it is proposed to separate the alkali or alkaline earth from the organic components by partial or complete oxidation in the aqueous phase with air and/or oxygen. Before this oxidation process, it is possible to separate the lignin in the black liquor by acidification and precipitation with a mineral acid, the resins by extraction and the demi-celluloses by ultra-filtration, whereupon the residual organic substances still remaining in solution are oxidised. Wet oxidation is possible such that the carboxylic acids, especially the acetic acid, is not burned as well and can be separated by crystallisation after caustification. The chemical solution thus freed of organic substances can be returned to the liquor by caustification and made available in the cellulose production cycle.

公开(公告)号：WO1984002522A1

公开(公告)日：1984-07-05

申请号：PCT/CH1983000145

申请日：1983-12-19

Applicant: L. GIVAUDAN & CIE SOCIÉTÉ ANONYME ,  COMNINELLIS, Christos ,  PLATTNER, Eric

Inventor： L. GIVAUDAN & CIE SOCIÉTÉ ANONYME

IPC: C07C47/542

CPC classification number: C25B1/00 ,  C07C45/28 ,  C07C47/542

Abstract: Production of a benzoic aldehyde of p-tert-butyl (TBB) by oxidation with a salt of Mn , which is produced by electrochemical oxidation of a salt of Mn , the chemical oxidation and the electro-chemical oxidation being effected in different reaction vessels.

Abstract translation: 通过Mn 2+盐的电化学氧化生成Mn-3+盐，通过氧化生成对叔丁基苯甲醛（TBB），化学氧化和电化学 在不同的反应容器中进行氧化。