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1987-07-16
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1985-12-17
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1993-09-30
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1989-12-14
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1989-10-16
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1985-12-17
Method of obtaining derivatives of 16-phenoxyprostratrienic acid
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1990-01-22
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1985-12-17
Method of obtaining novel derivatives of 6-methylenepenicillanic acid
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1989-08-07
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1986-10-21
Method of obtaining derivatives of nitroapovincaminic acid
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1988-07-13
Solutions of permonosulphuric acid
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1988-03-02
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1992-06-15
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1989-04-17
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1985-11-19
Method of obtaining concentrated solutions of acid caseine
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1982-10-28
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1988-11-10
Method of regenerationg acid baths
ZW20585A1
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1986-03-12
Neutralisation of acid contained in aqueous acid solutions
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1984-12-17
Method of manufacture of sulfuric acid
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1984-09-10
Method of manufacture of sulfuric acid
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1987-04-21
Energy-saving method of obtaining sulfuric acid
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1986-04-29
Preparation process of 3-hydroxy-3-methyl-glutaric acid
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1984-07-30
Method of manufacture of anhydrous sodium sulfate
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1991-05-06
Method of obtaining alkali salts of polymaleic acid
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1986-04-23
Sodium acid sulphate