First, it's important to determine what is causing the swallowing difficulties. You need to discuss this with a health provider.
If you still have this difficulty once the cause is known and treated, you should consult a dietitian who will work with you to try different juices to find which one will work best. There are many types of thickeners that may be added to liquids, as well as premade thick liquids, to help with swallowing.
With so many varieties and combinations of juices on the market, make sure you are buying 100-percent juice. Many types of juice are loaded with sugars and other substances.