Usage of   L + -Tartaric Acid

L(+)-Tartaric acid is widely used as acidulates in beverage, and other foods, such as soft drinks, wine, candy, bread and some colloidal sweetmeats. With its optical activity, L(+)-Tartaric acid is used as chemical resolving agent to resolve DL-amino-butanol, an intermediate for anti-tubercular drug. And it is used as chiral pool to synthesize tartarate derivatives. With its acidity, it is used as catalyst in the resin finishing of polyester fabric or pH value regulator in oryzanol production. With its complexation, L(+)-Tartaric acid is used in electroplating, sulfur removal and acid pickling. It is also used as complexing agent, screening agent or chelating agent in chemical analysis and pharmaceutical inspection, or as resist agent in dyeing. With its reduction, it is used as reductive agent in manufacturing mirror chemically or imaging agent in photography. It can also complex with metal ion and can be used as cleaning agent or polishing agent of metal surface.

In recent ten years,We are constantly pursuing good service of supplying high quality of the product and  competitive price.Our customers come from USA,India,Pakistan,Malaysia  and some African countries.We have accumulated much import and export experience.
With our continuous efforts,we can provide the following series of certificates.If you have other needs, please let us know.

 

IN 25KG PP Bag or as requested
22 MT in 20'FCL.

Tianjin Hwashin Biotechnology Co., Ltd is located in the Tianjin Jinbin industrial park, which is 30km to Beijing Daxing International Airport, 70km to Tianjin Binhai International Airport, and 100km to the Xingang port.
Since 2004, We have devoted ourselves to the research & development, production and sales of food additives, feed additives products. Currently, we have 4 business departments: Food Additives department, Feed additives department, Cosmetics materials department, Industrial and Daily Chemicals department. We have 4 productions bases in Tianjin, Hebei provice, Shandong provice and Jiangsu provice. Besides, we worked with the leading Chinese biotechnical and chemical producers, we offer more than 200 products to over 10 countries in the world. 
Hwashin team have excellent knowledge of biotechnology, chemicals and international business. Relied on a strict quality control system, through years of continuous technical innovation, the company could provide customers with first-class products and services.

1.To supply high-quality products with reasonable prices in food  additive industry.
2.Research on the Market Knowledge & trend follow up and inform customers of price trends in the market timely.Timely Deliver & Stock Promotion on hot demanding products.
3.To follow orders and arrange shipping in time, providing complete documents for Customs clearance according to different export policies in different countries.
4.Reliable & Strictly follow the contract responsibility & after sales service
5.Professional on International Logistic Service, Legalization documents & Third Party Inspection process.

Our Aim is that the goods reach the customers quickly and safely.

With the spread of the epidemic abroad,the shipping market has been greatly affected.
Nomally, most suppliers can't rent a boat and book a space.
However,it not difficult for us to solve the problem.
We have joined the local freight forwarding alliance.
It help us to get the accurate shipping information and solve the shipping problem.
And then we can help customers to make accurate decisions.

1. What are your payment terms?
Usually L/C,D/P,T/T, western union, moneygram or paypal.

2.How can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3. What's your delivery time?
lt depends on order quantity, usually we will arrange shipment within 3-20 days.

4.When can I get reply?
our sales manager will contact you within 12 hours.

5. How about the validity of products?
According to the products you order, usually 2 years.

6. What documents do you provide?
Usually, we provide Commercial nvoice, Packing List, Bill of Loading and OriginCertificate,etc.
lf there are any special requirements in your market, please let us know.

7. Can l get sample before order?
Yes, we can provide free sample once price is agreed, and you have to pay us the delivery fee in advance.If place following order after geting free sample, we will refund the shipping cost of free sample.

8.How to start orders or make payments?
A: You can send us your Purchase order, or just send a simple confirmation by email or by Trade Manager, after communication then we will send you Proforma Invoice with our bank details for final confirmation, then you can make payment accordingly.
 

The specific steps of the preparation method are as follows:

1. Preparation of crude (2R, 3R) - 2,3-dihydroxysuccinic anhydride

By weight, 1 part of maleic anhydride, 6-10 parts of distilled water and 0.01-0.02 parts of catalyst are added to the reactor

After stirring evenly, add 1.09-1.32 parts of potassium iodate and 1.29-1.56 parts of iodine, and then raise the temperature to

Reflux reaction at 100-105 ºC for 4-6 hours, end the reaction, cool to room temperature, filter and collect the precipitated solid, and obtain it after drying

The crude product of (2R, 3R) - 2,3-dihydroxysuccinic anhydride is directly used in the next reaction;

2. Preparation of L - (+) - tartaric acid

By weight, add 1 part of crude (2R, 3R) - 2,3-dihydroxysuccinic anhydride obtained in step a to the reactor

And 4-8 parts of sulfuric acid solution, heated to 100-105 ºC under stirring conditions, kept under stirring conditions for 4-6 hours, and then cooled

When it reaches room temperature, precipitate crystals, filter and collect the precipitated crystals, and obtain L - (+) - tartaric acid after drying;

The catalyst described in step a is sodium tungstate or potassium tungstate; The mass fraction of sulfuric acid solution described in step B is

10%-20%.