Industrial Tyrosine Method 25, Industrial Tyrosine Method

H2O and H2SO4 will undergo a centering reaction".

I think it's unlikely, these elements can't have a neutralization reaction of h are all +1 valence, o are all -2 valence, s only one substance has many ways to make sulfuric acid industrially.

The most advanced are: (as far as I know) energy-saving refining sulfuric acid furnace equipment know of several of them:

1. Sulfuric acid production method by enriching low-concentration sulfur dioxide gas by amino acid method 2. Integrated process using on-site regenerated sulfuric acid as catalyst 3. Utilization of sulfuric acid waste liquid in oxalic acid production.

4. Purification and concentration process of waste sulfuric acid obtained from nitration of mixed acid of aromatic compounds 5, regeneration method of waste sulfuric acid solution discharged from titanium oxide production process 6, method of separating organophosphorus compounds and other impurities from dilute sulfuric acid 7, method of sulfuric acid from sulfur-containing by-products of preparation of 2-hydroxy-4-methylthiobutyric acid (MHA) process.

8. Catalytic oxidation of ** method containing organic waste sulfuric acid.

9. Sulfuric acid production device for batteries.

10. Liquid phase conversion method from sulfur dioxide source to sulfuric acid.

11. Method for preparing sulfuric acid by roasting sulfur in boiling furnace.

12. The first utilization of dilute acid in the boiling furnace doping sulfur production device 13. The production method of high concentration sulfur dioxide gas three turns and three absorption of sulfuric acid.

14. Wear-resistant shaft sleeve for high-temperature concentrated sulfuric acid submerged pump.

15. High-efficiency anodic protection shell and tube type concentrated sulfuric acid cooler.

16. Energy-saving refining sulfuric acid furnace device.

17. Method for preparing sulfuric acid by incineration of refined benzene regeneration acid.

18. Method and device for using waste sulfuric acid regeneration liquid.

19. The use of acid gas containing hydrogen sulfide and sulfur to produce high-concentration sulfuric acid 20, the use of acidic gas containing hydrogen sulfide to produce high-concentration sulfuric acid.

1. Alkali dissolution section.

Raw material: tertiary mother liquor (tertiary neutralization stage product in L-cystine production).

Excipients: liquid alkali, pure water, activated carbon.

The mother liquor of the tertiary nucleus is passed into the alkali dissolution tank, and the liquid alkali, pure water, activated carbon, temperature 90, alkali dissolution time 6h, filtered.

End product: 1, filter residue (**utilization) 2, filtrate (to neutralize the stage).

Second, a neutralization segment.

Excipients: hydrochloric acid.

The filtrate entered the primary neutralization tank, hydrochloric acid was introduced, the temperature was 80, the neutralization time was 6h, the end point pH = was filtered.

End product: 1, filtrate (**utilization) 2, filter residue (decolorization).

Third, the decolorization section.

Excipients: hydrochloric acid, steam, pure water, activated carbon.

The filter residue enters the decolorization tank, passes (throws) hydrochloric acid, steam, pure water, activated carbon, temperature 80, decolorization time 2h, end point pH=, filtration.

End product: 1, filter residue (**utilization) 2, filtrate (to secondary neutralization section).

Fourth, the secondary neutralization section.

Excipients: ammonia.

The filtrate enters the secondary neutralization tank, ammonia is introduced, the temperature is 80, the neutralization time is 4h, the end point pH = crystallization, and filtration.

End-point products: 1, filtrate (**utilization) 2, filter residue (i.e., L-tyrosine crude book, de-refining section).

Fifth, the refining section.

Excipients: distilled water, steamed orange steam.

Rinse the products in the upper process with distilled water and centrifuge to dry, send them to the dryer, pass into the steam to dry, pack, store, dry at a temperature of 100, air pressure, and a drying time of 5h.

End product: L-tyrosine finished product.

First, a condensed section.

Raw material: primary mother liquor (primary neutralization stage product in cystine production).

Excipients: steam.

The primary mother liquor is passed into the primary concentration tank, steam is introduced, the temperature is 120, the air pressure is MPa, the concentration time is 6h, crystallization and filtration.

End product: crystallization solution (primary decolorization section) crystal, (NH4Cl)** utilization.

Second, a decolorization section.

Excipients: activated carbon, pure water.

The crystallization liquid enters the primary decolorization tank, and is put into activated carbon, pure water, temperature 70, decolorization time 2h, and filtered.

End product: 1, filter residue (**utilization) 2, solution (go to the upper column section).

Third, the upper column section.

Excipients: cation exchange resin, pure water, ammonia.

The solution enters the cation exchange column (flow rate 500L h), the upper column volume: 100kg 2 columns, the upper column is finished, the quantitative water washing, the amount of pure water is twice the column volume, the solution is eluted with ammonia water after water washing and collected until the second column effluent has histidine when the Pauly reaction stops.

End-point product: histidine collection solution (de-concentration ammonia expulsion section).

Fourth, concentrate the ammonia section.

Excipients: pure water.

Histidine collection solution Yong high-efficiency film is concentrated to a viscous state, properly diluted with pure water, discharged, and the end product: concentrated dilution (decolorization section).

Fifth, decolorization.

Excipients: 6mol L of HCl

Concentrate the diluent Yong 6mol l HCl to adjust, add activated carbon for decolorization, plate and frame pressing, and the filtrate is pumped into the concentrator with a pump.

End product: 1, decolorization filtrate (deconcentrated crystallization section).

Sixth, concentrate the crystallization section.

The concentrate is in the concentrator at 80-90 degrees, vacuum concentrated until a large number of crystals appear, discharge, cold discussion, centrifugal collection of histidine, that is, the crude product of histidine, the mother liquor, and reuse.

Seventh, refining section.

Add water to the crude histidine product, raise the temperature to 70 degrees, correct the pH value, add activated carbon for decolorization, heat preservation and stirring for 1h, the light transmittance of decolorization should reach more than 99%, plate and frame filtration, after ultrafiltration, the filtrate is pumped into the concentrator with a pump, in a high vacuum, below 80-90 degrees, concentrated until a large number of crystals appear, discharge, cold analysis, centrifugal collection of histidine, that is, histidine boutique, mother liquor, reuse.

Histidine products are dried in a double-cone rotary evaporation dryer until the moisture reaches the standard.